Enhanced method for dispersing carbon nanotubes in silicone compositions

Abstract

The present invention relates to the field of material science and engineering, specifically to the formulation of silicone compositions containing carbon nanotubes. It introduces a novel method for achieving superior dispersion of Carbon Nanotubes (CNTs) within a silicone matrix, which is a significant challenge in the current state of the art. This process not only preserves the mechanical properties of the silicone material but also achieves a desired level of electrical conductivity.

Description

[0001]2912909-120000 ENHANCED METHOD FOR DISPERSING CARBON NANOTUBES IN SILICONE COMPOSITIONS TECHNICAL FIELD The present invention relates to the field of material science and engineering, specifically to the formulation of silicone compositions containing carbon nanotubes. It introduces a novel method for achieving superior dispersion of carbon nanotubes (CNTs) within a silicone matrix, which is a significant challenge in the current state of the art. This process not only preserves the mechanical properties of the silicone material but also achieves a desired level of electrical conductivity. The invention is particularly relevant to the development of new liquid silicone rubber compositions containing carbon nanotubes. These compositions, upon curing, exhibit the advantage of having a volume resistivity of less than 10 ohm-cm, a property that is beneficial in various applications where electrical conductivity of the silicone rubber is important. In addition to the aforementioned benefits, the process of creating these novel liquid silicone rubber compositions containing carbon nanotubes allows for the preservation of key physical properties. Notably, the Tensile Strength, Tear Strength, and Elongation characteristics of cured materials are maintained at optimal levels. This balance between enhanced electrical conductivity and robust physical properties makes this invention highly advantageous for a wide range of applications This invention represents a significant advancement in the field of material science and engineering, particularly in the formulation of silicone compositions for applications in industries such as medical, automotive, electronics, and aerospace sectors. BACKGROUND OF THE INVENTION In the rapidly advancing field of wearable technology, a key area of focus is the development of devices capable of delivering therapeutic interventions. These interventions cover a wide range, including heat therapies and electro-stimulation, among others. The efficacy of these wearable devices is largely dependent on the quality and characteristics of the materials used in their fabrication. Silicone rubber has emerged as a preferred material for such applications, due to its exceptional properties. These include flexibility, superior biocompatibility, robust chemical resistance, stability over a wide temperature range, and ease of manufacturing. Silicone rubber is commonly known to be an insulating material. Hence, a primary challenge in the development of wearable devices is the integration of electrical conductivity into silicone rubber, a critical component for the delivery of electrical therapies. Traditionally, this has been achieved using additives such as carbon black, silver-coated glass spheres, or heavy metal fillers like silver flakes. However, these conventional additives present several obstacles. The cost factor is significant, particularly with silver- based additives. Purity is another concern, as impurities can affect the overall performance and longevity of the device. Purity is of particular concern in sensitive medical applications, such as bio-manufacturing 2912909-120000 and neuroscience. The consistency of electrical performance in small fabricated parts is crucial for the reliability of wearable devices, and traditional additives often fall short in this regard. Additionally, these additives can lead to processing difficulties, complicating the manufacturing process and potentially impacting the durability and lifespan of the device. Therefore, the search for alternative materials that can overcome these hurdles is a key focus in the field of wearable device development. Carbon nanotubes (CNTs), including Single-Walled Carbon Nanotubes (SWCNTs), Multi-Walled Carbon Nanotubes (MWCNTs), and Crosslinked Carbon Nanotubes (CCNTs), offer a promising alternative. Their high electrical conductivity and high aspect ratio make them effective in modifying the electrical properties of silicone elastomers. However, their application introduces its own set of challenges. Single-Walled Carbon Nanotubes (SWCNTs)^are nanostructures comprising a singular layer of carbon atoms arranged in a hexagonal lattice, forming a hollow cylindrical configuration. These structures exhibit exceptional thermal, mechanical, and electrical properties, attributable to their unique atomic arrangement and nanoscale dimensions, typically in the range of 0.5–2.0 nanometers in diameter. The formation of SWCNTs can be conceptualized as a two-dimensional graphene sheet, seamlessly rolled to create a hollow cylinder. Multi-Walled Carbon Nanotubes (MWCNTs)^are elongated, hollow cylindrical nanostructures composed of multiple layers of carbon atoms arranged in a hexagonal lattice. The diameter of these structures typically ranges from 3 to 30 nanometers, and they can extend several centimeters in length, resulting in an aspect ratio that can vary between 10 and ten million. The wall thickness of a MWCNT is fairly constant along the axis, providing a straight inner channel. These nanotubes are distinguishable from their single-walled counterparts by their larger diameter and their unique Raman spectrum. Crosslinked Carbon Nanotubes (CCNTs)^represent a class of carbon nanotubes that have undergone a process of crosslinking, a procedure that creates covalent bonds between separate carbon nanotube structures. These CCNTs consist of a multitude of carbon nanotubes (CNTs) interconnected in a polymeric structure. The interconnection of these CNTs can be achieved through various means such as branching, interdigitation, entanglement, or the sharing of common walls. In addition to crosslinking, these CCNTs are also branched, meaning they have multiple arms or extensions stemming from a single carbon nanotube structure. This unique configuration of branched and crosslinked CCNTs forms an integral part of the present invention and offers a promising solution to the aforementioned challenges. They could provide a cost-effective, pure, and consistent means of integrating electrical conductivity into silicone rubber, thereby enhancing the performance and reliability of wearable devices. Their use could also simplify the manufacturing process and improve the durability and lifespan of the device. Thus, carbon nanostructures, specifically branched and crosslinked carbon nanotubes, represent a promising avenue for future research and development in the field of wearable devices. CNTs are manufactured and sold as entangled agglomerates, which if not disentangled, can adversely affect the mechanical and electrical properties of silicone material. Ensuring sufficient dispersion of CNTs throughout the silicone matrix is crucial to guarantee high and uniform electrically conductive performance and provide the desired mechanical properties. 2912909-120000 Moreover, the integration of CNTs into a liquid silicone composition requires a delicate balance. It is essential to achieve the desired conductive performance while maintaining the mechanical properties required for the wearable device application. Furthermore, the percolation threshold, the critical concentration of the conductive additive in the silicone elastomer necessary to exhibit electrically conductive characteristics, plays a pivotal role. At this threshold, there are sufficient additive-to-additive connections within the silicone matrix to transmit electrical charge. The percolation threshold, a fundamental concept in the realm of electrically conductive silicone molding, is influenced by numerous factors. These factors include the type of conductive additive used, the particle size of the additive, the aspect ratio, the loading level or the weight percentage (wt%) of the additive in the silicone elastomer, and the degree of dispersion of the additive in the silicone matrix. The type of conductive additive plays a significant role as different additives have varying conductive properties. For instance, CNTs due to their high conductivity and high aspect ratio, are effective in modifying the electrical properties of silicone elastomers. In the context of composites, particularly those involving CNT-silicone, the role of particle size is multifaceted and complex. While smaller particles can enhance additive-to-additive connections within the silicone matrix, potentially lowering the percolation threshold, the influence of particle size on the electrical properties of the composite is not straightforward. It is known that the relationship between particle size and electrical conductivity is material dependent, and for nanomaterials, the electrical properties can vary significantly from their bulk counterparts. In the case of CNT-silicone composites, the conductivity is found to depend upon higher moments of CNT length. This is explained by a combined effect between the particle size polydispersity and clustering. However, the factors of CNT polydispersity and the quality of dispersion are still not fully understood and can substantially alter the desired properties of the composite. Therefore, the specific impact of particle size on the electrical properties of the composite will depend on the nature of the additive material used, its dispersion quality within the matrix, and its size polydispersity. The loading level or the weight percentage (wt%) of the additive is also crucial. It’s a delicate balance as increasing the wt% can improve the conductive performance but substantially alters the materials rheology and processability, as well as may degrade the mechanical properties of the silicone elastomer. Therefore, determining the optimal wt% is essential to achieve the desired conductive performance while delivering the required mechanical properties. Suppliers of CNTs often note that these nanotubes are more readily dispersed in polar thermoplastics. This is due to the unique π-electron-rich structures of CNTs, which allow for a variety of modifications and alterations of their chemical and electronic properties. However, achieving good dispersion in non-polar materials, such as silicones, presents a significant challenge. This difficulty arises from the high aspect ratio and strong inter-tube van der Waals interactions of CNTs, which make them difficult to disperse homogeneously in polymers. Furthermore, CNTs are chemically inert in nature because they lack functional groups on their surface, resulting in low solubility in solvents and poor compatibility with polymer matrices. 2912909-120000 In the production of a liquid silicone composition containing carbon nanotubes (CNTs), including Single-Walled Carbon Nanotubes (SWCNTs), Multi-Walled Carbon Nanotubes (MWCNTs), and Crosslinked Carbon Nanotubes (CCNTs), several challenges arise due to the inherent properties of the materials and the methods employed in the prior art. These challenges necessitate meticulous control of the quantity of nanotubes and the mixing process to achieve the desired balance of properties. Controlled Degree of Dispersion: The controlled degree of dispersion of the additive in the silicone matrix is of paramount importance. When CNTs are sufficiently dispersed, it ensures uniform conductive performance across the molded silicone component and helps maintain the mechanical properties of the material. It’s important to note that CNTs are supplied in an agglomerated state. The challenge lies in achieving a sufficient disentanglement of these agglomerates and dispersion within the silicone matrix. Once adequately dispersed into the silicone matrix, the CNTs do not re-agglomerate. However, it’s crucial to avoid over-dispersion or over-processing of CNTs, as this can lead to a drop in the electrical performance of the composition. Therefore, the initial dispersion process is crucial as it directly impacts the mechanical properties, processing, and electrical performance of the silicone material. Large Specific Surface Area (SSA) of Carbon Nanotubes (CNTs): The large SSA of CNTs enables them to interact effectively, particularly when the CNTs are of sufficient length to entangle. This attribute is impactful as it implies that even a minimal quantity of CNTs can lead to a significant increase in the viscosity of the liquid silicone composition in which they are mixed. This viscosity augmentation is attributed to the high aspect ratio of the nanotubes and their propensity to form a network structure within the liquid silicone composition, particularly in the case of longer CNTs. As the nanotubes are disentangled and dispersed into the silicone composition, they establish a complex, interconnected structure that hinders the flow of the liquid silicone composition, thereby escalating its viscosity. This phenomenon is especially noticeable in liquid silicone compositions with initial low viscosity, where the introduction of a small amount of nanotubes can result in a substantial increase in viscosity. Furthermore, the disentanglement of nanotubes can also amplify the mechanical properties of the liquid silicone composition, rendering it more robust and durable. This is particularly advantageous in applications where enhanced mechanical strength is desired, such as in the fabrication of composite materials or in the development of wearable devices. Viscosity Increase: The addition of CNTs to the liquid silicone composition can lead to a significant increase in viscosity due to high volume and particle interactions. This heightened viscosity can pose challenges in terms of processing and handling of the liquid silicone composition, making it more difficult to mix, apply in thin layers, or use to prepare small parts. Mechanical Destruction of CNTs: Many prior art methods involve high-speed mixers, kneaders, or ultrasonic treatments. It has been evidenced that these methods can lead to partial mechanical destruction of the CNTs, resulting in a quick collapse of the conductivity of the mixtures. Use of Solvents: Many of the prior art methods require the use of solvents to aid in the disentanglement of CNT agglomerates, which necessitates an additional operating step to remove the solvent. Solvent residues can cause blistering in the product and impair the mechanical properties. Moreover, the use of solvents can have negative impacts on handling and shipping. Solvents can pose safety risks during handling and may require special precautions or packaging during shipping, adding to 2912909-120000 the overall cost and complexity. Additionally, solvents can have environmental implications. The disposal of used solvents needs to be managed carefully to prevent environmental contamination, and the evaporation of solvents can contribute to air pollution. Therefore, methods that avoid or minimize the use of solvents are highly desirable from a safety, cost, and environmental perspective. These challenges underscore the need for an improved method for producing a liquid silicone masterbatch containing carbon nanotubes, which the present invention aims to address. In this context, the potential of Multi-Walled Carbon Nanotubes (MWCNTs) is being explored as the primary focus of this patent. MWCNTs, due to their unique properties and structures, may offer a promising solution to the aforementioned challenges. They could provide a cost-effective, pure, and consistent means of integrating electrical conductivity into silicone rubber, thereby enhancing the performance and reliability of wearable devices. Their use could also simplify the manufacturing process and improve the durability and lifespan of the device. However, this patent also encompasses the use of Single-Walled Carbon Nanotubes (SWCNTs) and Crosslinked Carbon Nanotubes (CCNTs). These materials, due to their unique properties and structures, may also offer promising solutions to the challenges faced in the field of wearable devices. Thus, carbon nanostructures, including MWCNTs, SWCNTs, and CCNTs, represent a promising avenue for future research and development in the field of wearable devices. This patent aims to provide a comprehensive solution by considering all these forms of carbon nanotubes. In the realm of fabricating liquid silicone masterbatches containing carbon nanotubes (CNTs), the known methodologies delineated in prior art US-2022 / 0380551 have been identified to possess a multitude of constraints. It was stated that these techniques predominantly employ high-temperature crosslinking silicone elastomers that exhibit a substantial viscosity, frequently surpassing 1,000,000 mPa.s. It was also quoted that the manufacturing was customarily executed via kneaders and / or roller mills which have been subjected to critique for their labor-intensive nature, protracted duration and most importantly that they bear a notable drawback in that the conductivity of the mixtures precipitously deteriorates. This was ostensibly attributable to the partial mechanical disintegration of the CNTs during the production process. Furthermore, the inclusion of carbon nanotubes (CNTs) in electrically conductive silicone compositions can substantially increase material hardness. For instance, in a formulation with a high durometer, the integration of CNTs can escalate the hardness by over 10 Shore A points. This increased hardness can pose a challenge when formulating highly electrically conductive silicone elastomers with a low durometer. Processing such formulations with apparatus such as a 3-roll mill mixing device can present its own set of challenges. It necessitates meticulous consideration of the processing conditions to circumvent any adverse impacts on the final product. In the field of electroconductive carbon nanotube-silicone composition mixtures, inventors face a significant challenge. The electroconductivity of these mixtures, which are often processed via methods such as a three-roll mill, is largely dependent on the dispersion quality of the carbon nanotubes within the silicone matrix. A superior dispersion quality typically leads to a more conductive mixture. However, with 2912909-120000 the technology available, achieving a Volume Resistivity lower than 10 ohm-cm in the cured silicone material containing carbon nanotubes has proven to be a substantial hurdle. This forms the core issue that the present invention is designed to tackle. SUMMARY OF THE INVENTION In the pursuit of the objectives outlined herein, the present inventors have undertaken exhaustive and meticulous investigations. These investigations have led to the realization of an invention that provides a method for achieving the optimal dispersion of Carbon Nanotubes (CNTs) within both non-curable liquid silicone masterbatches and curable liquid silicone compositions. This method not only ensures the preservation of the present invention but also significantly enhances its utility and effectiveness. Furthermore, as a result of the inventive process, the inventors have been able to prepare new liquid silicone compositions containing carbon nanotubes. Upon curing, these compositions yield a silicone material with a Volume Resistivity lower than 10 ohm-cm. This achievement represents a significant advancement in the field and underscores the transformative potential of the present invention. Despite these challenges, this method ensures the preservation of the mechanical properties’ integrity while concurrently striving for the desired level of conductivity. This novel approach addresses the challenges associated with the integration of electrical conductivity into silicone rubber, thereby laying the groundwork for substantial advancements in the field of wearable technology and beyond. Maintaining the integrity of the mechanical properties while concurrently achieving the desired level of conductivity is a challenge. This novel approach addresses the difficulties associated with integrating electrical conductivity into silicone rubber, thereby laying the groundwork for substantial advancements in the field of wearable technology and beyond. The potential applications of this technology extend well beyond its immediate scope, permeating various industries including, but not limited to, medical, automotive, electronics, and aerospace sectors. As such, the invention signifies a considerable advancement in the field of material science and engineering, demonstrating the transformative power of innovative material design and processing techniques. This invention illustrates the potential of silicone material science when combined with advanced nanotechnology, suggesting new possibilities for the development of next-generation wearable devices and other applications. While the immediate application of this technology is primarily centered on the silicone field, particularly with an emphasis on emerging medical trends, its potential extends well beyond this domain. The ability to incorporate electrical conductivity into silicone rubber heralds a plethora of possibilities across various industries. For instance, within the automotive industry, this technology could revolutionize the development of sensors and actuators. An application area of significant importance is Electromagnetic Interference (EMI) shielding. Carbon Nanotubes (CNTs) have demonstrated advantages over metal fillers, offering a lightweight solution without compromising on performance. Notably, CNTs exhibit superior shielding effectiveness at 2912909-120000 frequencies exceeding 5-6G, making them highly suitable for emerging technologies operating above those frequencies. The incorporation of CNTs into silicone rubber could catalyze considerable advancements in EMI shielding applications, thereby expanding the potential applications of this technology. It is evident that the superior shielding performance of CNTs at frequencies higher than 5-6G, coupled with their lightweight nature, makes them an ideal choice for future technologies operating at these higher frequencies. Moreover, the potential application areas are vast, ranging from railroad and mass transit systems, medical equipment, IT and Telecom, automotive, industrial equipment, consumer electronics, to defense and aerospace. Each of these sectors has specific EMI challenges that can be effectively addressed by our technology. In the electronics industry, it could catalyze the creation of more flexible and durable components. Even within the aerospace sector, this technology could find applications in the fabrication of lightweight, yet robust components used in satellites, fighter jets, or radar systems. Consequently, the potential of this technology is not only vast but also diverse, marking it as a significant advancement in the field of material science and engineering. This underscores the transformative power of this invention, poised to redefine the boundaries of what is possible in these industries. In one aspect, there is provided a process for producing a liquid silicone masterbatch containing carbon nanotubes, comprising the steps of: 1) providing a liquid silicone composition containing carbon nanotubes agglomerates; 2) optionally pre-mixing the carbon nanotubes in the liquid silicone composition using a suitable mixer, such as a high-speed mixer or a planetary mixer, to wet out the carbon nanotubes by applying a suitable level of shear stress; and most preferably pre-mixing the components with a planetary mixer or a Schold's Mixer; 3) providing a mixing apparatus; 4) mixing the liquid silicone composition containing the carbon nanotube agglomerates by applying a shear stress at a sufficient level to initiate the breakdown and disentanglement of the carbon nanotube agglomerates, 5) reprocessing the resulting mixture by repeating step 4) with the following additional conditions: the shear stress is increased, and to complete a second cycle, 6) optionally reprocessing at least once the resulting mixture of the preceding step with the following additional conditions: the shear stress is increased, and to complete another cycle; 7) optionally reprocessing at least once the resulting mixture of the preceding step by maintaining, increasing, or diminishing the shear stresses to complete final cycle(s); and 8) recovering the liquid silicone composition containing carbon nanotubes. 2912909-120000 In a second aspect, there is provided a process for producing a non-curable liquid silicone masterbatch containing carbon nanotubes, comprising the steps of: 1) providing a non-curable liquid silicone masterbatch containing carbon nanotubes agglomerates; 2) optionally pre-mixing the carbon nanotubes in the liquid silicone composition using a suitable mixer, such as a high-speed mixer or a planetary mixer, to wet out the carbon nanotubes; and most preferably pre-mixing the components with a planetary mixer or a Schold's Mixer; 3) providing a 3-roll mill apparatus: i. comprising a first roll (feed roll), a second roll (center roll) and a third roll (apron roll) with diameters of at least 0.05 m, ii. regulating the rotation speed of the rolls such that the apron roll rotates at a minimum speed of 50 RPM; iii. setting a first gap width between the feed roll and the center roll to be less than or equal to 100 µm, preferably less than or equal to 75 µm or less than or equal to 60 µm; iv. setting a second gap width between the center roll and the apron roll to be less than or equal to 100 µm, preferably less than or equal to 75 µm, less than or equal to 50 µm, less than or equal to 40 µm; less than or equal to 30 µm; and 4) processing the liquid silicone composition containing the carbon nanotube agglomerates by introducing it into the first gap between the feed roll and the center roll, where a first set of shear rate and shear stress conditions are applied, and then passed through the second gap between the center roll and the apron roll, where a second set of shear rate and shear stress conditions are applied, both shear stresses are defined to a sufficient level to initiate the breakdown and disentanglement of the carbon nanotube agglomerates, to complete a first cycle; 5) reprocessing the resulting mixture by repeating step 4) with the following additional conditions: • the shear stress which occurs within the first gap width between the feed roll and the center roll is increased, and • the shear stress which occurs within the second gap width between the center roll and the apron roll is increased; to complete a second cycle, and preferably the shear stresses are increased by diminishing the first gap width between the feed roll and the center roll and the second gap width between the center roll and the apron roll compared to the previous cycle; 6) optionally reprocessing at least once the resulting mixture of the preceding step with the following additional conditions: the shear stress is increased, and to complete another cycle; 7) optionally reprocessing at least once the resulting mixture of the preceding step by maintaining, increasing, or diminishing the shear stresses to complete final cycle(s); and 8) recovering the non-curable liquid silicone masterbatch. 2912909-120000 In another aspect, there is provided a process for producing a curable liquid silicone composition containing carbon nanotubes, the process comprises: 1) preparing a non-curable liquid silicone masterbatch that contains carbon nanotubes according to the process of the invention and as described therein; 2) adding to the non-curable liquid silicone masterbatch: a) a hydrosilylation catalyst E in an amount to render the composition curable by hydrosilylation reactions, preferably the hydrosilylation catalyst is provided as a catalyst masterbatch comprising at least one hydrosilylation catalyst E and at least one vinyl siloxane polymer, and more preferably said hydrosilylation catalyst is provided as a catalyst masterbatch comprising at least one platinum-based catalyst E1 and at least one vinyl siloxane polymer; b) optionally an amount by weight of at least one cure rate controller F to slow the curing reaction, and c) optionally an amount by weight of at least one additive G. In a fourth aspect, the invention concerns a non-curable liquid silicone masterbatch containing carbon nanotubes and a curable liquid silicone rubber composition containing carbon nanotubes, and prepared according to the invention and useful for preparing a cured silicone rubber material having a durometer from over 40 Shore A to 90 Shore A. The curable composition can also be provided as a two- part component composition or as a multi-part component composition. In a fifth aspect, the invention concerns a non-curable liquid silicone masterbatch containing carbon nanotubes and a curable liquid silicone rubber composition containing carbon nanotubes, prepared according to the process of the invention and useful for preparing a cured silicone rubber material having a durometer from 10 Shore A to 40 Shore A. The curable composition can also be provided as a two-part component composition or as a multi-part component composition. In another aspect, there is provided an electrically conductive silicone rubber material obtained by curing the curable liquid silicone rubber compositions obtained according to the process of the invention. In another aspect, there is provided a process for producing a molded silicone rubber product M1 containing carbon nanotubes via injection molding comprising the following steps: a) feeding into a base feed line the non-curable liquid silicone masterbatch that contains carbon nanotubes according to the invention and as described therein; b) feeding into a separate catalyst feed line a hydrosilylation catalyst E in an amount to render the composition curable by hydrosilylation reactions, preferably the hydrosilylation catalyst is provided as a catalyst masterbatch comprising at least one hydrosilylation catalyst E and at least one vinyl siloxane polymer, and more preferably said hydrosilylation catalyst is provided as a catalyst masterbatch comprising at least one platinum-based catalyst E1 and at least one vinyl siloxane polymer; c) optionally feeding into a separate feed line a cure rate controller F to slow the curing reaction, 2912909-120000 d) optionally feeding into a separate additive feed line at least one additive G, e) directing said non-curable liquid silicone masterbatch, said hydrosilylation catalyst E, optionally said cure rate controller F and optionally said additive G either into a mixing tank prior directing the resulting mixture into a barrel of an injection machine or directly into said barrel to obtain a curable liquid silicone rubber composition containing carbon nanotubes; and f) allowing the resulting mixture to cure, preferably by heating at a temperature ranging from 80°C to up to 220°C, so as to obtain a molded silicone rubber product M1 containing carbon nanotubes. The injection molding process is initiated by introducing the curable liquid silicone rubber composition containing carbon nanotubes into the injection machine. This machine is equipped with a heated barrel, which uses a reciprocating screw to thoroughly mix and heat the composition, thereby facilitating the curing process. The heated and mixed composition is then injected into a mold under high pressure. This mold is designed to match the desired shape of the final silicone rubber product M1. The high pressure ensures that the composition fills and conforms to every part of the mold. Once the composition is injected, it is allowed to cool and cure within the mold. The curing process is expedited by the application of heat, preferably at a temperature ranging from 80°C to up to 220°C. This heat-induced curing solidifies the composition, transforming it into a durable silicone rubber. After the curing process is complete, the mold is opened, and the silicone rubber product M1 is ejected. The product retains the shape of the mold, featuring the unique properties imparted by the carbon nanotubes. The entire process, from the introduction of the composition to the ejection of the final product, is controlled and monitored to ensure consistency and quality in the produced silicone rubber products. Adjustments can be made to the process parameters as needed, based on the specific requirements of the product and the performance of the composition during the molding process. In another aspect of the present invention, there is provided an article which comprises a portion of material prepared from an electrically conductive silicone rubber material according to the invention. Specifically, the article may comprise a first portion and a second portion, wherein the first portion is made from the electrically conductive silicone rubber material and the second portion is non-conductive. This configuration allows for the selective application of conductive properties to specific areas of the article, thereby providing enhanced functionality and versatility. For instance, in the case of a dental device, a portion of it may be made from the electrically conductive silicone rubber material, while another portion remains traditional Liquid Silicone Rubber (LSR) which is non-conductive. This unique combination of materials allows for the creation of a dental device that is both safe for use and capable of conducting electrical signals, thereby opening up new possibilities for data collection and health monitoring. The invention provides an article which comprises a portion of material prepared from an electrically conductive silicone rubber material according to the invention. This article could take various forms, such as a sensor, a biosensor, a dental device, silicone dots used as an interface between a machine and skin for diagnostic readings, or a point-of-care device. In addition, the silicone composition containing Carbon Nanotubes (CNTs) prepared according to the invention has potential uses in a wide range of fields, including but not limited to the following: 2912909-120000 1. Bio-manufacturing and Bio-pharma processes: The silicone composition could be used to create sensors that monitor conditions in bio-manufacturing processes. The high sensitivity and conductivity of CNTs make them ideal for detecting minute changes in environmental conditions, which can be critical in bio-pharma processes. 2. Neuroscience: In the field of neuroscience, the silicone composition could be used in long-term implantable devices. The biocompatibility and flexibility of silicone, combined with the electrical conductivity of CNTs, could allow for devices that interact directly with neural tissue without causing damage or inflammation. 3. Detection and Drug Delivery Systems: The silicone composition could be used to create devices for targeted drug delivery. The conductivity of CNTs could be used to control the release of drugs in response to specific triggers, improving the efficacy and reducing the side effects of treatments for conditions such as Alzheimer’s and Parkinson’s diseases. 4. Biosensors: The silicone composition could be used to create biosensors for a variety of applications. The high surface area and conductivity of CNTs make them ideal for detecting specific biological markers, which could be used in everything from medical diagnostics to athletic performance monitoring. 5. Diagnostics: In diagnostics, the silicone composition could be used to create strain sensors or piezo-resistive devices that collect bio-signals. The flexibility and conductivity of the silicone-CNT composite make it ideal for wearable devices that need to conform to the body while still accurately collecting data. 6. Radio Technology: In radio technology, the silicone composition could be used in the fabrication of antennas. The conductivity of CNTs and the flexibility of silicone could allow for antennas that are lightweight, flexible, and highly efficient. 7. Cables, Radiation Shields, Light-Absorption Devices, and Heat Spreaders: The silicone composition could be used in a variety of other applications due to the unique properties of CNTs. Their high thermal conductivity makes them ideal for heat spreaders, while their electrical conductivity could be used in cables and radiation shields. Their ability to absorb light could also be used in light-absorption devices. 8. Adaptive Camouflage: The conductive properties of the silicone composition could be utilized in hunting sport to create adaptive camouflage systems that can change color or pattern in response to environmental conditions. 9. Bio-Reactive Devices: The silicone composition could be used in the creation of bio-reactive devices that can interact with biological systems, potentially providing new solutions in the field of medical technology. 10. Electro-Adaptive Coatings: The silicone composition could be used to create coatings that can change their properties in response to electrical signals, opening up possibilities for smart surfaces and interfaces. 2912909-120000 ADVANTAGEOUS EFFECTS OF THE INVENTION The present invention provides a process for producing a non-curable or curable liquid silicone masterbatch containing carbon nanotubes, which offers significant advantages over existing methods. One of the key advantages is the ability to control the elemental composition, and thereby the conductivity, of the silicone masterbatch through the optimization of the mixing process parameters. Scanning Electron Microscopy (SEM) imaging and Energy Dispersive Analysis X-ray spectroscopy (EDX) are employed to provide further insights into the microstructures and elemental composition of the silicone masterbatch. Specifically, the SEM images reveal the presence of spherical and tubular carbon- based objects within the non-curable or curable liquid silicone masterbatch. Notably, these carbon-based objects are of lower size and less in numbers compared to the similar formulation but just after the wet-out process (step 2). These objects were identified as carbon-based materials. The process of the present invention effectively downsizes the agglomerates of carbon nanotubes and diminishes their number, increasing CNT dispersion, which is a critical factor in enhancing the conductivity of the silicone masterbatches. The presence of these downsized and fewer agglomerates contributes to the enhanced conductivity of the silicone masterbatches, demonstrating the effectiveness of the present process. The present invention introduces a novel method for preparing a silicone composition containing carbon nanotubes, offering several distinct advantages, in particular in the wearable device industry. The invention provides a silicone composition containing carbon nanotubes with a lower volume resistivity, indicative of enhanced conductivity. This feature can amplify the sensitivity and response time of the sensors embedded within the wearable device. This amplification improves the device’s proficiency in accurately capturing and transmitting data, such as heart rate or movement, thereby augmenting the user’s experience. Furthermore, the silicone composition, upon curing, exhibits a uniform distribution of electrical resistivity across the object. This uniformity is a critical feature for the reliable performance of wearable devices, ensuring consistent sensor readings and power consumption across the device. The processability of the silicone masterbatch is improved, with enhanced moldability, and die-cut capabilities of cured objects, leading to less scrap. From a sustainability standpoint, the lower filler loading is four times lower than carbon black, leading to lower CO2 emissions. This invention signifies a substantial progression in the wearable device industry by introducing a silicone composition that enhances sensor performance and user experience through the provision of lower volume resistivity. This unique approach to preparing silicone compositions containing carbon nanotubes sets this invention apart, offering a tailored solution for wearable device manufacturers. Therefore, the invention facilitates significant progress in the realm of wearable technology. It enables the creation of wearable devices capable of delivering therapeutic interventions via electrically conductive silicone rubber. 2912909-120000 The versatility of the technology is underscored by its potential applicability across a diverse range of industries. These include, but are not limited to, the medical, automotive, electronics, and aerospace sectors. The invention successfully addresses the challenges associated with the incorporation of conductivity into silicone rubber. It achieves this without compromising the mechanical properties of the silicone or the ease of its processing. Another significant application area of this invention is in Electromagnetic Interference (EMI) shielding. The Carbon Nanotubes (CNTs) incorporated in the silicone rubber offer a lightweight solution without compromising on performance. Notably, these CNTs exhibit superior shielding effectiveness at frequencies exceeding 5-6G, making them highly suitable for emerging technologies operating above these frequency ranges. This incorporation of CNTs into silicone rubber could catalyze considerable advancements in EMI shielding applications, thereby expanding the potential applications of this technology. The superior shielding performance of CNTs at frequencies higher than 5-6G, coupled with their lightweight nature, makes them an ideal choice for future technologies operating at these higher frequencies This innovative approach constitutes a substantial advancement in the field of material science and engineering, paving the way for future developments. DETAILED DESCRIPTION The present invention will be described in detail below. The invention concerns a process for producing a liquid silicone masterbatch containing carbon nanotubes, comprising the steps of: 1) providing a liquid silicone composition containing carbon nanotubes agglomerates; 2) optionally pre-mixing the carbon nanotubes in the liquid silicone composition using a suitable mixer, such as a high-speed mixer or a planetary mixer, to wet out the carbon nanotubes by applying a suitable level of shear stress; and most preferably pre-mixing the components with a planetary mixer or a Schold's Mixer; 3) providing a mixing apparatus; 4) mixing the liquid silicone composition containing the carbon nanotube agglomerates by applying a shear stress at a sufficient level to initiate the breakdown and disentanglement of the carbon nanotube agglomerates, 5) reprocessing the resulting mixture by repeating step 4) with the following additional conditions: the shear stress is increased, and to complete a second cycle, 6) optionally reprocessing at least once the resulting mixture of the preceding step with the following additional conditions: the shear stress is increased, and to complete another cycle; 7) optionally reprocessing at least once the resulting mixture of the preceding step by maintaining, increasing, or diminishing the shear stresses to complete final cycle(s); and 8) recovering the liquid silicone composition containing carbon nanotubes. 2912909-120000 The present invention provides a novel and innovative process for producing a liquid silicone masterbatch containing carbon nanotubes. This process is characterized by a meticulous approach to shear stress application, which is divided into distinct stages serving specific purposes. Step 1: Provision of Liquid Silicone Composition: The process begins with the provision of a liquid silicone composition containing carbon nanotube agglomerates. This composition serves as the base material to produce the masterbatch. Step 2: Pre-mixing and Wetting Out: In this optional but advantageous step, the carbon nanotubes are pre-mixed with the liquid silicone composition using a suitable mixer, such as a high-speed mixer or a planetary mixer. The application of a suitable level of shear stress ensures that the carbon nanotubes are adequately wetted out, which means they are completely or almost completely surrounded and coated by the liquid silicone composition. This step is advantageous in preparing the carbon nanotubes for the subsequent dispersion process while maintaining their integrity. An effective wet-out process results in the transformation of the carbon nanotubes from a free-flowing powder into a state where they are no longer free-flowing. The term "suitable shear stress" in this context refers to a level of shear stress that is sufficient to ensure the carbon nanotubes are coated with enough of the liquid silicone composition such that there is no longer a free-flowing powder present, but not so high as to cause significant breakage of the carbon nanotube agglomerates or damage to the carbon nanotubes themselves. This is typically a lower level of shear stress compared to the subsequent stages of the process. The application of a suitable level of shear stress in step 2) is advantageous for several reasons: • Effective Wetting Out: A suitable level of shear stress ensures that the carbon nanotubes are adequately wetted out, which means they are coated with enough of the liquid silicone composition such that there is no longer a free-flowing powder present. This is an advantageous step in preparing the carbon nanotubes for the subsequent dispersion process. • Protection of Material Integrity: By applying a suitable level of shear stress, the integrity of the carbon nanotubes and the composition structure is protected. This reduces the risk of potential damage that could adversely affect the properties and performance of the final product. • Process Efficiency: The application of a suitable level of shear stress in this step significantly contributes to the efficiency of the overall process. It prepares the materials for the subsequent stages of processing, thereby facilitating a more effective and efficient dispersion process. Furthermore, this step enhances the handling characteristics of the materials. Specifically, it is much easier to handle a masterbatch containing carbon nanotubes (CNT) when introduced into the 3RM, as compared to handling the pre-wet material or individual components on the mill. This ease of handling not only improves the safety and convenience of the process but also contributes to the overall efficiency by reducing the time and effort required for material handling. 2912909-120000 In the context of the present invention, the utilized liquid silicone composition can be any suitable non-curable liquid silicone composition. The selection of the silicone formulation may hinge on various factors. These include the desired properties of the final product, the compatibility with Carbon Nanotubes (CNTs), and the conditions under which the process is executed. The liquid silicone composition, to which the CNTs are added, can either be an individual silicone component or a compounded / formulated blend of components, depending on the specific requirements of the application. In accordance with one embodiment of the present invention, a method for determining a suitable level of shear stress in step 2) comprises the following steps a) to c): • Step a): Initial Shear Stress Application In the initial stage, a shear stress at a lower end of a targeted range, is applied during this optional pre-mixing stage. The dispersion of the carbon nanotubes in the liquid silicone composition is monitored using techniques known in the art, such as microscopy or spectroscopy. • Step b): Incremental Shear Stress Increase If the carbon nanotubes are not adequately wetted out at this initial shear stress level, the shear stress is incrementally increased, for instance. Following each increase, the dispersion of the carbon nanotubes in the liquid silicone composition is again monitored. Step c): Optimal Shear Stress Identification This process is continued until the carbon nanotubes are adequately wetted out. An effective wet-out process results in the transformation of the carbon nanotubes from a free-flowing powder into a state where they are no longer free-flowing. The shear stress level at this point is considered the optimal shear stress for the pre-mixing stage. This method allows for the determination of optimal shear stress levels that ensure adequate wetting out of the carbon nanotubes, while minimizing the risk of significant breakage or disentanglement of the carbon nanotube agglomerates or damage to the carbon nanotubes themselves. This contributes to the efficiency of the overall process and the quality of the final product. During this stage, a relatively lower shear stress is typically applied. The value will depend on the viscosity and the amount of carbon nanotubes present in the liquid silicone composition. This lower shear stress is sufficient to ensure the carbon nanotubes are adequately wetted out without causing significant breakage or disentanglement of the agglomerates. In an even more preferred embodiment, the components are pre-mixed with a planetary mixer or a Schold's Mixer. These types of mixers are especially suitable for this step due to their ability to provide a controlled and efficient mixing process, which are advantageous for achieving an effective wetting out of the carbon nanotubes. Step 3: Provision of Mixing Apparatus: A suitable mixing apparatus is provided. This apparatus is specifically designed or chosen for its ability to apply a shear stress sufficient to initiate the breakdown and disentanglement of the carbon nanotube agglomerates. This mixing apparatus is preferably a high shear mixing apparatus, which can include but is not limited to a 3RM, a rotor stator mixer, a sonolator, an inductor, or other high shear mixing equipment. The term ‘high shear’ in this context refers to mixers that generate substantial shear forces to effectively disperse the carbon nanotubes within the silicone 2912909-120000 composition. The exact level of shear is not specified, as it can vary depending on the specific equipment used and the desired properties of the final product. The primary aim of Step 4) is to initiate the breakdown and disentanglement of the carbon nanotube agglomerates and to start dispersing them uniformly within the liquid silicone composition. The shear stress applied in this step is significantly higher than that in Step 2), facilitating more effective dispersion. However, it is carefully controlled to ensure the carbon nanotubes are starting to disperse without causing any damage. The determination of the required shear stress in this step 4) can be achieved through a method comprising the following steps: • Step 4a: Initial Shear Stress Application An initial shear stress, higher than that applied in step 2), is applied to the mixture. This can be done using the mixing apparatus provided in step 3). The dispersion of the carbon nanotubes in the liquid silicone composition is monitored using techniques known in the art, such as microscopy or spectroscopy. • Step 4b: Incremental Shear Stress Increase If the carbon nanotube agglomerates breakdown is not initiated at this initial shear stress level, the shear stress is incrementally increased. ²After each increase, the dispersion of the carbon nanotubes in the liquid silicone composition is again monitored. • Step 4c: Optimal Shear Stress Identification This process is continued until the carbon nanotube agglomerates breakdown is initiated. The shear stress level at this point is considered the optimal shear stress for the mixing stage of step 4). Step 5): Reprocessing with Increased Shear Stress: In this step, the resulting mixture from the preceding step is reprocessed by repeating the mixing process, but with an increased shear stress. The increase in shear stress serves to further break down the carbon nanotube agglomerates and enhance their dispersion within the liquid silicone composition. The determination of the increased shear stress level can be achieved through a method similar to that described in step 4), with the initial shear stress level set at a higher point. In the context of the present invention, the term 'reprocessing' refers to a specific sequence of operations that begins with the recovery of the adduct resulting from the previous step. This recovered adduct, which is a mixture of the liquid silicone composition and the carbon nanotubes, serves as the starting material for the next cycle of the process. In each reprocessing step 5), 6), and 7), the recovered adduct is subjected to mixing under specific conditions of shear stress. The shear stress is increased in steps 5) and 6) and increased, maintained, or diminished in step 7) depending on the composition of the silicone composition containing carbon nanotubes. This sequence of recovery and mixing is repeated in each reprocessing step, thereby ensuring a controlled and effective dispersion of the carbon nanotubes within the liquid silicone composition. The repeated cycles of reprocessing serve to gradually break down and disentangle the carbon nanotube 2912909-120000 agglomerates and enhance their dispersion within the liquid silicone composition, contributing to the overall quality and performance of the final product. Step 6: Optional additional Reprocessing Cycles The resulting mixture of the preceding step is reprocessed at least once with the following additional conditions: the shear stress is increased, and to complete another cycle. This step allows for further dispersion of the carbon nanotubes and helps to ensure a uniform distribution within the liquid silicone composition. The number of additional cycles can be determined based on the desired level of dispersion and the specific properties of the carbon nanotubes and the liquid silicone composition. Step 7: Optional final Reprocessing Cycles The resulting mixture of the preceding step is reprocessed at least once by maintaining, increasing, or diminishing the shear stresses to complete the final cycle(s). This step helps to consolidate the dispersion of the carbon nanotubes and finalize the structure of the masterbatch. The decision to maintain, increase or diminish the shear stresses can be based on the observed dispersion of the carbon nanotubes in the liquid silicone composition and the desired properties of the final product. These steps, characterized by their meticulous approach to shear stress application and their distinct stages of processing, offer significant advantages over existing methods. They ensure a controlled and effective dispersion of carbon nanotubes in the liquid silicone composition, enhancing the overall quality and performance of the final product. This clear progression and distinct methodology significantly contribute to the patentability of this invention, offering an inventive step over existing methods. In the context of this invention, the level of shear stress applied during the mixing process can significantly impact the dispersion of carbon nanotubes, particularly low viscous silicone formulation and / or silicone formulations that contain lubricious components. Higher shear stress is required for these types of formulations to ensure proper dispersion of the carbon nanotubes. Lubricious components, as referred to in this document, are used in liquid silicone rubber (LSR) formulations and can include, but are not limited to, classes of compounds such as Polydimethylsiloxane (PDMS) oil, vinyl functional PDMS oil, crosslinkers, monovinyl functional PDMS oil, and the like. In a preferred embodiment, in step 4) mixing the liquid silicone composition containing the carbon nanotube agglomerates is accomplished by applying a shear rate of at least 5000 (1 / s), preferably at least 10000 (1 / s), and even more preferably 15000 (1 / s), under conditions that initiate the breakdown and disentanglement of the carbon nanotube agglomerates, and in step 5) a shear rate of at least 10000 (1 / s), preferably at least 20000 (1 / s), and even more preferably 30000 (1 / s), under conditions that further disperse the carbon nanotubes within the silicone composition. In another preferred embodiment, in step 3) the preferred mixing apparatus is a 3-roll mill apparatus. In another preferred embodiment, the invention concerns a process for producing a non-curable liquid silicone masterbatch containing carbon nanotubes, comprising the steps of: 1) providing a liquid silicone composition containing carbon nanotubes agglomerates; 2912909-120000 2) optionally pre-mixing the carbon nanotubes in the liquid silicone composition using a suitable mixer, such as a high-speed mixer or a planetary mixer, to wet out the carbon nanotubes; and most preferably pre-mixing the components with a planetary mixer or a Schold's mixer; 3) providing a 3-roll mill apparatus: i. comprising a first roll (feed roll), a second roll (center roll) and a third roll (apron roll) with diameters of at least 0.05 m, preferably with diameters from 0.05 m to 0.80 m, ii. regulating the rotation speed of the rolls such that the apron roll rotates at a minimum speed of 50 RPM, more preferably at minimum speeds of 100 RPM, 125 RPM, 150 RPM, or 200 RPM, and most preferably within a range of 50 to 300 RPM, 100 to 300 RPM, or 150 to 300 RPM; iii. setting a first gap width between the feed roll and the center roll to be less than or equal to 100 µm, preferably less than or equal to 75 µm or less than or equal to 60 µm; iv. setting a second gap width between the center roll and the apron roll to be less than or equal to 100 µm, preferably less than or equal to 75 µm, less than or equal to 50 µm, less than or equal to 40 µm; less than or equal to 30 µm; and 4) processing the liquid silicone composition containing the carbon nanotube agglomerates by introducing it into the first gap between the feed roll and the center roll, where a first set of shear stress and shear rate conditions are applied, and then passed through the second gap between the center roll and the apron roll, where a second set of shear stress and shear rate conditions are applied, both shear stresses are defined to a sufficient level to initiate the breakdown and disentanglement of the carbon nanotube agglomerates, to complete a first cycle; preferably it is chosen within the range from 12000 Pa to 15000 Pa. 5) reprocessing the resulting mixture by repeating step 4) with the following additional conditions: • the shear stress which occurs within the first gap width between the feed roll and the center roll is increased, preferably it is chosen within the range from 13000 Pa to 16000 Pa, and • the shear stress which occurs within the second gap width between the center roll and the apron roll is increased; to complete a second cycle, and preferably the shear stresses are increased by diminishing the first gap width between the feed roll and the center roll and the second gap width between the center roll and the apron roll compared to the previous cycle; 6) optionally reprocessing at least once the resulting mixture of the preceding step with the following additional conditions: the shear stress is increased, preferably it is chosen within the range from 14000 Pa to 17000 Pa for the 3rd cycle, to complete another cycle; 7) optionally reprocessing at least once the resulting mixture of the preceding step by maintaining, increasing, or diminishing the shear stresses to complete final cycle(s); and 8) recovering the non-curable liquid silicone masterbatch. 2912909-120000 The reprocessing stage denotes the supplementary processing cycles that the mixture of liquid silicone and carbon nanotubes undergoes following the initial processing phase within the 3RM apparatus. During this secondary stage, an increase in shear stress occurs within the first and second gap widths. Shear stress represents the material's innate resistance to shearing or sliding deformation prompted by the rotation of the mill apparatus's rolls. In this context, the material refers to the silicone-CNT mixture. As the shear stress intensifies, so does the force applied to the mixture, thereby enhancing the dispersion of the CNTs throughout the silicone matrix. In a preferred embodiment, in step 4) mixing the liquid silicone composition containing the carbon nanotube agglomerates is accomplished by applying a shear rate of at least 5000 (1 / s), preferably at least 10000 (1 / s), and even more preferably 15000 (1 / s), under conditions that initiate the breakdown and disentanglement of the carbon nanotube agglomerates, and in step 5) a shear rate of at least 10000 (1 / s), preferably at least 20000 (1 / s), and even more preferably 30000 (1 / s), under conditions that further disperse the carbon nanotubes within the silicone composition. One approach to accomplish this boost in shear stress is achieved by reducing the gap widths between the feed roll and the center roll, as well as between the center roll and the apron roll, and / or by augmenting the shear rate of the rolls. The narrowing of these gaps subjects the mixture to heightened forces as it passes through, effectively aiding in the breakdown and disentanglement of any remaining CNT agglomerates and ensuring a more homogeneous distribution of the CNTs within the silicone matrix. Shear stress: in a 3RM the shear stress is the force that the rolls apply to the material to cause it to deform. The shear stress can be calculated from the shear rate and the viscosity of the material, usingthe equation: Here, μ is the dynamic viscosity of the material, and γ is the shear rate. Shear Rate (γ): In a 3RM, the shear rate is the rate at which the material is deformed or “worked” as it passes through the gaps between the rolls. The shear rate can be controlled by adjusting the size of the rolls, speed of the rolls and the gap between them. For example, a larger gap or slower roll speed will result in a lower shear rate, while a smaller gap or faster roll speed will result in a higher shear rate. It canbe calculated by the following formula: ^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^,^^^^ (^^^^−^^^^) = ^^^^^^^^^^^^ • dV = difference in linear velocity between rollers (unit = m / s) • h = roller gap (unit = m) The increase in the rolls' shear rate also contributes to the elevation of shear stress within the mixture. Upon the mixture's passage through the diminished gaps and its subsequent exposure to the amplified shear stress, the additional processing cycle, referred to as the second cycle in the claim, is completed. This process can be repeated, with each following cycle upholding the heightened shear stress conditions, until the desired level of dispersion and homogeneity of CNTs within the silicone matrix is achieved. 2912909-120000 In essence, the reprocessing step, as defined in the invention, entails multiple cycles of processing within the 3RM apparatus under heightened shear stress conditions. These conditions can be realized by decreasing the gap widths between the rolls. This method facilitates the homogeneous dispersion of carbon nanotubes within the silicone composition, thereby enhancing the overall quality and performance of the resulting non-curable liquid silicone masterbatch. In a preferred embodiment, in step 5) to complete a second cycle when reprocessing the resulting mixture by repeating step 4), it is preferred that: • The shear stress which occurs within the first gap width between the feed roll and the center roll is increased by at least 50%, preferably by at least 75%, even more preferably by at least 100%, by at least 125%, by at least 150%, by at least 175%, by at least 200%, and • The shear stress which occurs within the second gap width between the center roll and the apron roll is increased by at least 50%, preferably by at least 75%, even more preferably by at least 100%, by at least 125%, by at least 150%. In another preferred embodiment, in step 6) when reprocessing at least once the resulting mixture of the preceding step the shear stress is increased to complete a third cycle; it is preferred that: • the shear stress which occurs within the first gap width between the feed roll and the center roll is increased by at least 50%, preferably by at least 75%, even more preferably by at least 100%, by at least 125%, by at least 150%, by at least 175%, by at least 200%, and • the shear stress which occurs within the second gap width between the center roll and the apron roll is increased by at least 50%, preferably by at least 75%, even more preferably by at least 100%, by at least 125%, by at least 150%. In another preferred embodiment, in step 4) processing the liquid silicone composition containing the carbon nanotube agglomerates by introducing it into the first gap between the feed roll and the center roll with a shear rate of at least 3000 (1 / s), preferably at least 4000 (1 / s), and even more preferably 5000 (1 / s), and then passed through the second gap between the center roll and the apron roll with a shear rate of at least 10000 (1 / s), preferably of at least 20000 (1 / s) and even more preferably 30000 (1 / s), for a diameter of the rollers of at least 0.05 m and a speed of the apron roll of at least around 150 RPM, and preferably at least 200 RPM, to complete a first cycle. In accordance with the preferred embodiment delineated, the following observations are made: Efficient Processing: The procedure outlined in step 4) adeptly processes the liquid silicone composition laden with carbon nanotube agglomerates. The employment of distinct shear rates in the initial and subsequent gaps assures the optimal dispersion of the CNTs within the silicone matrix. Controlled Shear Rates: The shear rates, specifically of at least 3000 (1 / s), preferably at least 4000 (1 / s), and even more preferably 5000 (1 / s), and then passed through the second gap between the center roll and the apron roll with a shear rate of at least 10000 (1 / s), preferably of at least 20000 (1 / s) and even more preferably 30000 (1 / s), for a diameter of the rollers of at least 0.05 m and a speed of the apron roll of at least around 150 RPM, and preferably at least 200 RPM, to complete a first cycle, are selected to 2912909-120000 strike a balance between the necessity for sufficient dispersion of CNTs and the preservation of the silicone's mechanical properties. Roller Specifications: The stipulated roller diameter of no less than 0.05 m and an apron roll speed of approximately 50 RPM are likely optimized for the processing of the silicone composition. These parameters may be pivotal in achieving the desired conductivity and mechanical properties of the end product. In another embodiment, in step 5) processing the liquid silicone composition containing the carbon nanotube agglomerates by introducing it into the first gap between the feed roll and the center roll with a shear rate of at least 10000 (1 / s), preferably at least 12000 (1 / s), and even more preferably 14000 (1 / s), and then passed through the second gap between the center roll and the apron roll with a shear rate of at least 30000 (1 / s), for a diameter of the rollers of at least 0.05 m and a speed of the apron roll of at least around 150 RPM, and preferably at least 200 RPM, to complete a second cycle. In another preferred embodiment, step 6) is accomplished and repeated at least twice according to the conditions described above. In another embodiment, the present invention, as detailed herein, pertains to a process for producing a liquid silicone masterbatch containing carbon nanotubes, comprising the following steps: 1) Provision of a liquid silicone composition containing carbon nanotube agglomerates; 2) Optional pre-mixing of the carbon nanotubes in the liquid silicone composition using an appropriate mixer, such as a high-speed mixer or a planetary mixer, to wet out the carbon nanotubes by applying a suitable level of shear stress; most preferably pre-mixing the components with a planetary mixer or a Schold’s Mixer; 3) Optionally, the components are mixed utilizing cavitation techniques; 4) Provision of a mixing apparatus; 5) Mixing of the liquid silicone composition containing the carbon nanotube agglomerates by applying a shear stress at a level sufficient to initiate the breakdown and disentanglement of the carbon nanotube agglomerates; 6) Reprocessing of the resulting mixture of the preceding step under the following additional conditions: the shear stress is increased, and a second cycle is completed; 7) Optionally reprocessing of the resulting mixture the preceding step at least once according to the conditions of step 5) to complete an additional cycle; 8) Optional reprocessing of the resulting mixture of the preceding step at least once by maintaining, increasing or reducing the shear stresses to complete the final cycle(s); and 9) Recovery of the liquid silicone composition containing carbon nanotubes. Cavitation techniques refer to the process of formation and collapse of vacuum cavities within a liquid. This can occur when a liquid is subjected to rapid changes of pressure that cause the formation of cavities where the pressure is relatively low. When subjected to higher pressure, these cavities, called “bubbles” or “voids”, collapse and can generate shock waves that are very strong and very short, technically known as microjets and shock waves. 2912909-120000 As a preferred embodiment, the process according to the invention comprise the following steps: 1) Provision of a liquid silicone composition containing carbon nanotube agglomerates; 2) pre-mixing of the carbon nanotubes in the liquid silicone composition using an appropriate mixer, such as a high-speed mixer or a planetary mixer, to wet out the carbon nanotubes by applying a suitable level of shear stress; most preferably pre-mixing the components with a planetary mixer or a Schold’s Mixer; 3) Provision of a mixing apparatus; 4) Mixing of the liquid silicone composition containing the carbon nanotube agglomerates by applying a shear stress at a level sufficient to initiate the breakdown and disentanglement of the carbon nanotube agglomerates (cycle n°1 or pass n°1); 5) Reprocessing of the resulting mixture of the preceding step under the following additional conditions: the shear stress is increased, and a second cycle (or pass n°2) is completed; 6) reprocessing of the resulting mixture the preceding step at least once according to the conditions of step 5 to complete an additional cycle (third cycle or pass n°3); 7) reprocessing of the resulting mixture of the preceding step at least once by maintaining, the shear stresses to complete the final cycle (cycle 4 orpPass n°4); and 8) Recovery of the liquid silicone composition containing carbon nanotubes. As another preferred embodiment, the in-process Shear Stress (Pa) is as follow for the following passes or cycles: • Pass n°1: the in-process shear stress is chosen according to the condition set in step 4) and is ranging from12500 Pa to 15000 Pa. • Pass n°2: the in-process shear stress is chosen according to the condition set in step 5) and is from 13200 Pa to 16000 Pa; • Pass n°3: the in-process shear stress is chosen according to the condition set in step 6) and is from 14500 Pa to 17000 Pa; • Pass n°4: the in-process shear stress is chosen according to the condition set in step 7) and is from 14500 Pa to 17000 Pa. One specific embodiment of the invention concerns a process according to the invention and as described above, wherein in step 1) the liquid silicone composition containing carbon nanotubes agglomerates is a non-curable liquid silicone rubber masterbatch containing carbon nanotubes agglomerates masterbatch and comprising: (a) for 100 parts by weight of at least one polydiorganosiloxane A of general formula (I): [(R2)b(Alk)cSiO2 / 2]a[(Alk)(R2)2SiO1 / 2]2(I) - wherein symbols R are independently of one another selected from the group consisting of (i) unsubstituted or fluorinated C1-C20 hydrocarbon radical and (ii) phenyl radical; - wherein symbol Alk is a C2-C6alkenyl group; and preferably said alkenyl groups are chosen from the group consisting of vinyl, allyl, and hexenyl; - where b=1 or 2, c= 0 or 1 and b+c=2; and 2912909-120000 - wherein the index a>1, preferably a is from 5 to 1500, most preferably a is from 5 to 1500, c=0 and b=2, and even more preferably a is from 100 to 1200, c=0 and b=2 or a is from 100 to 1000, c=0 and b=2; (b) from 1 parts by weight to 80 parts by weight of at least one silicone resin B containing vinyl groups, preferably from 5 parts by weight to 50 parts by weight and most preferably from 10 parts by weight to 40 parts by weight; (c) from 1 part by weight to 80 parts by weight of at least one filler C preferably from 5 part by weight to 50 parts by weight and most preferably from 10 part by weight to 40 parts by weight; (d) from 1 part by weight to 60 parts by weight of at least one organosilicon crosslinker XL containing at least 3 silicon-bonded hydrogen atoms per molecule when structured as a linear molecule, or at least two silicon-bonded hydrogen atoms when it takes the form of a branched polymer, preferably from 5 parts by weight to 40 parts by weight, and most preferably from 10 parts by weight to 30 parts by weight; (e) from 0.01 parts by weight to 20 parts by weight of at least one electrically conductive filler D chosen from the group of single-walled carbon nanotubes, multi-walled carbon nanotubes, crosslinked carbon nanotubes and their corresponding blends, preferably from 0.1 part by weight to 10 parts by weight and most preferably from 0.25 part by weight to 10 parts by weight; and (f) from 0 part by weight to 40 parts by weight of at least one polydiorganosiloxane XL3 containing at least 3 silicon-bonded C2-C6alkenyl groups per polymer; (g) from 0 part by weight to 20 parts by weight of at least one diorganohydrogensiloxy- terminated polydiorganosiloxane CE1, and (h) from 0 part by weight to 20 parts by weight of at least one polydiorganosiloxane M containing a single silicon-bonded C2-C6alkenyl group per polymer. This specific embodiment produces of non-curable liquid silicone masterbatches which are useful for the preparation of cured silicone rubber material having a durometer from over 40 Shore A to 90 Shore A and after addition of the catalyst part and optionally the addition of a control part containing curing inhibitors or cure rate control component and curing the resulting formulation. In the context of the present invention, the term 'Shore A hardness' is used to denote the hardness of the cured silicone rubber material. Shore A hardness is a measure of the resistance of a material to indentation, with higher values indicating a harder material and lower values indicating a softer material (example of useful standard to measure a Shore A hardness is standard ASTM D2240). In the specific embodiment of the invention described, the cured silicone rubber material has a Shore A hardness ranging from over 40 to 90. This range indicates that the material has a moderate to high level of hardness, which can contribute to its durability and resistance to wear and tear. Another specific embodiment of the invention is a process according to the invention and as described above wherein in step 1) the liquid silicone composition containing carbon nanotubes 2912909-120000 agglomerates is a non-curable liquid silicone rubber masterbatch containing carbon nanotubes agglomerates masterbatch and comprising: (a) for 100 parts by weight of at least one polydiorganosiloxane A of general formula (I): [(R2)b(Alk)cSiO2 / 2]a [(Alk)(R2)2SiO1 / 2]2 (I) - wherein symbols R are independently of one another selected from the group consisting of (i) unsubstituted or fluorinated C1-C20hydrocarbon radical and (ii) phenyl radical; - wherein symbol Alk is a C2-C4alkenyl group; - where b=1 or 2, c= 0 or 1 and b+c=2; and - wherein the index a is from 1 to 1200, (b) from 1 part by weight to 80 parts by weight of at least one filler C preferably from 5 part by weight to 50 parts by weight and most preferably from 10 part by weight to 40 parts by weight; (c) from 0.01 parts by weight to 10 parts by weight of at least one organosilicon crosslinker XL containing at least 3 silicon-bonded hydrogen atoms per molecule when structured as a linear molecule, or at least two silicon-bonded hydrogen atoms when it takes the form of a branched polymer, preferably from 0.1 part by weight to 5 parts by weight, and most preferably from 0.2 part by weight to 2.5 parts by weight; (d) from 0.01 parts by weight to 20 parts by weight of at least one electrically conductive filler D chosen from the group of single-walled carbon nanotubes, multi-walled carbon nanotubes, crosslinked carbon nanotubes and their corresponding blends, preferably from 0.1 part by weight to 10 parts by weight and most preferably from 0.25 part by weight to 10 parts by weight; (e) from 0 part by weight to 15 parts by weight of at least one diorganohydrogensiloxy- terminated polydiorganosiloxane CE, and preferably from 0.1 part by weight to 15 parts by weight; (f) from 0 part by weight to 120 parts by weight of a monovinyl functional polydimethylsiloxane polymer; and (g) from 0 part by weight to 10 parts by weight of at least one polydimethylsiloxane polymer. This specific embodiment results in non-curable liquid silicone masterbatches. These masterbatches play a crucial role in the creation of cured silicone rubber material, which exhibits a durometer ranging from slightly above 10 Shore A to 40 Shore A. The process involves the addition of a catalyst component and, optionally, a control component that contains curing inhibitors or cure rate control constituents. Following these additions, the resulting formulation is subjected to a curing process. This methodological approach underscores the innovative nature of the present invention in the realm of material science and engineering. According to a preferred embodiment, the invention concerns a non-curable liquid silicone rubber masterbatch obtained from the process of the invention and as described above, and which is useful for preparing a cured silicone rubber material having a durometer from over 40 Shore A to 90 Shore A and comprising: (a) for 100 parts by weight of at least one polydiorganosiloxane A of general formula (I): 2912909-120000 [(R2)b(Alk)cSiO2 / 2]a [(Alk)(R2)2SiO1 / 2]2 (I) - wherein symbols R are independently of one another selected from the group consisting of (i) unsubstituted or fluorinated C1-C20hydrocarbon radical and (ii) phenyl radical; - wherein symbol Alk is a C2-C6 alkenyl group; and preferably said alkenyl groups are chosen from the group consisting of vinyl, allyl, and hexenyl; - where b=1 or 2, c= 0 or 1 and b+c=2; and - wherein the index a>1, preferably a is from 5 to 1500, most preferably a is from 5 to 1500, c=0 and b=2, and even more preferably a is from 100 to 1200, c=0 and b=2 or a is from 100 to 1000, c=0 and b=2; (b) from 1 parts by weight to 80 parts by weight of at least one silicone resin B containing vinyl groups, preferably from 5 parts by weight to 50 parts by weight and most preferably from 10 parts by weight to 40 parts by weight; (c) from 1 part by weight to 80 parts by weight of at least one filler C preferably from 5 part by weight to 50 parts by weight and most preferably from 10 part by weight to 40 parts by weight; (d) from 1 part by weight to 60 parts by weight of at least one organosilicon crosslinker XL containing at least 3 silicon-bonded hydrogen atoms per molecule when structured as a linear molecule, or at least two silicon-bonded hydrogen atoms when it takes the form of a branched polymer, preferably from 5 parts by weight to 40 parts by weight, and most preferably from 10 parts by weight to 30 parts by weight; (e) from 0.01 parts by weight to 20 parts by weight of at least one electrically conductive filler D chosen from the group of single-walled carbon nanotubes, multi-walled carbon nanotubes, crosslinked carbon nanotubes and their corresponding blends, preferably from 0.1 part by weight to 10 parts by weight and most preferably from 0.25 part by weight to 10 parts by weight; and (f) from 0 part by weight to 40 parts by weight of at least one polydiorganosiloxane XL3 containing at least 3 silicon-bonded C2-C6alkenyl groups per polymer; (g) from 0 part by weight to 20 parts by weight of at least one diorganohydrogensiloxy- terminated polydiorganosiloxane CE1, and (h) from 0 part by weight to 20 parts by weight of at least one polydiorganosiloxane M containing a single silicon-bonded C2-C6alkenyl group per polymer. According to another preferred embodiment, the invention concerns a non-curable liquid silicone rubber masterbatch obtained from the process according to the invention and as described therein, and which is useful for preparing a cured silicone rubber material having a durometer from 10 Shore A to up to 40 Shore A and comprising: (a) for 100 parts by weight of at least one polydiorganosiloxane A of general formula (I): [(R2)b(Alk)cSiO2 / 2]a [(Alk)(R2)2SiO1 / 2]2 (I) - wherein symbols R are independently of one another selected from the group consisting of (i) unsubstituted or fluorinated C1-C20 hydrocarbon radical and (ii) phenyl radical; 2912909-120000 - wherein symbol Alk is a C2-C4 alkenyl group; - where b=1 or 2, c= 0 or 1 and b+c=2; and - wherein the index a is from 1 to 1200, (b) from 1 part by weight to 80 parts by weight of at least one filler C preferably from 5 part by weight to 50 parts by weight and most preferably from 10 part by weight to 40 parts by weight; (c) from 0.01 parts by weight to 10 parts by weight of at least one organosilicon crosslinker XL containing at least 3 silicon-bonded hydrogen atoms per molecule when structured as a linear molecule, or at least two silicon-bonded hydrogen atoms when it takes the form of a branched polymer, preferably from 0.1 part by weight to 5 parts by weight, and most preferably from 0.2 part by weight to 2.5 parts by weight; (d) from 0.01 parts by weight to 20 parts by weight of at least one electrically conductive filler D chosen from the group of single-walled carbon nanotubes, multi-walled carbon nanotubes, crosslinked carbon nanotubes and their corresponding blends, preferably from 0.1 part by weight to 10 parts by weight and most preferably from 0.25 part by weight to 10 parts by weight; (e) from 0 part by weight to 15 parts by weight of at least one diorganohydrogensiloxy- terminated polydiorganosiloxane CE, and preferably from 0.1 part by weight to 15 parts by weight; (f) from 0 part by weight to 120 parts by weight of a monovinyl functional polydimethylsiloxane polymer; and (g) from 0 part by weight to 10 parts by weight of at least one polydimethylsiloxane polymer. This specific embodiment results in non-curable liquid silicone masterbatches. These masterbatches play a crucial role in the creation of cured silicone rubber material, which exhibits a durometer ranging from slightly above 10 Shore A to 40 Shore A. The process involves the addition of a catalyst component and, optionally, a control component that contains curing inhibitors or cure rate control constituents. Following these additions, the resulting formulation is subjected to a curing process. This methodological approach underscores the innovative nature of the present invention in the realm of material science and engineering. According to another embodiment, the invention concerns a process for producing a curable liquid silicone composition containing carbon nanotubes, the process comprises: 1) preparing a non-curable liquid silicone masterbatch that contains carbon nanotubes according to the invention and as described above; 2) adding to the prepared non-curable liquid silicone masterbatch: a) a hydrosilylation catalyst E in an amount to render the composition curable by hydrosilylation reactions, preferably the hydrosilylation catalyst is provided as a catalyst masterbatch comprising at least one hydrosilylation catalyst E and at least one vinyl siloxane polymer, and more preferably said hydrosilylation catalyst is provided as a 2912909-120000 catalyst masterbatch comprising at least one platinum-based catalyst E1 and at least one vinyl siloxane polymer; b) optionally an amount by weight of at least one cure rate controller F to slow the curing reaction, and c) optionally an amount by weight of at least one additive G. Scanning Electron Microscopy (SEM) imaging and Energy Dispersive Analysis X-ray spectroscopy (EDX) were employed to provide further insights into the microstructures and elemental composition of the silicone masterbatch. Specifically, the SEM images reveal the presence of spherical and tubular carbon- based objects within the non-curable or curable liquid silicone masterbatch. Notably, these spherical carbon-based materials are of lower size and less in numbers compared to the similar formulation but just after the wet-out process (step 2). These objects are carbon-based materials. The present invention introduces a curable silicone composition containing carbon nanotubes, prepared according to a unique process. This process effectively reduces the size and quantity of carbon nanotube agglomerates, a critical factor in enhancing the electrical conductivity of silicone masterbatches. The presence of these downsized and fewer agglomerates significantly contributes to the enhanced conductivity of the silicone masterbatches. The invention provides a silicone composition containing carbon nanotubes that exhibits a lower volume resistivity, indicative of superior conductivity. This characteristic can significantly enhance the sensitivity and response time of sensors embedded within various devices. This enhancement, in turn, improves the device's ability to accurately capture and transmit data, such as heart rate or movement, thereby enriching the user's experience. This unique approach to preparing silicone compositions containing carbon nanotubes sets this invention apart, offering a tailored solution for manufacturers across various industries. The superior conductivity offered by this silicone composition has the potential to revolutionize the standards in the design and manufacture of a wide range of devices. This invention represents a substantial progression in the field by offering a silicone composition that enhances sensor performance and user experience through superior conductivity. According to another embodiment, the invention concerns a process for producing a curable liquid silicone composition containing carbon nanotubes and useful for preparing silicone rubber material having a durometer from over 15 Shore A to 80 Shore A the process comprises: 1) providing two non-curable liquid silicone masterbatches containing carbon nanotubes which are: a) a non-curable liquid silicone rubber masterbatch useful for preparing a cured silicone rubber material having a durometer from over 40 Shore A to 90 Shore A and according to the invention and as described above, and b) a non-curable liquid silicone rubber masterbatch useful for preparing a cured silicone rubber material having a durometer having a durometer from 10 Shore A to up to 40 Shore A and according to the invention and as described above; 2912909-120000 2) mixing said non-curable liquid silicone rubber masterbatches in a mixing ratio by weight (or volume) from 1:100 to 100:1; and 3) adding to the prepared non-curable liquid silicone masterbatch: a) a hydrosilylation catalyst E in an amount to render the composition curable by hydrosilylation reactions, preferably the hydrosilylation catalyst is provided as a catalyst masterbatch comprising at least one hydrosilylation catalyst E and at least one vinyl siloxane polymer, and more preferably said hydrosilylation catalyst is provided as a catalyst masterbatch comprising at least one platinum-based catalyst E1 and at least one vinyl siloxane polymer; b) optionally an amount by weight of at least one cure rate controller F to slow the curing reaction, and c) optionally an amount by weight of at least one additive G. The embodiment of the invention as described above offers significant advantages, particularly in the context of injection molding of liquid silicone rubber to prepare molded silicone material containing CNT. The process allows for the mixing of the two compositions in varying ratios, thereby enabling the user to easily achieve a desired Shore A hardness. The term ‘intermediate Shore A hardness’ refers to the range of hardness that can be achieved by varying the mixing ratio of the two different silicone masterbatches. This flexibility in the mixing ratio allows for the production of silicone materials with a hardness that falls between the hardness levels of the two original masterbatches. In practical terms, this means that the user can customize the hardness of the silicone material based on specific application requirements, providing a level of adaptability that is a significant advantage in the field of silicone rubber material production. Thus, this embodiment of the invention provides a versatile and efficient solution to the challenges faced in the field. According to another embodiment, the invention concerns a curable liquid silicone composition containing carbon nanotubes and prepared according to the invention as described above. According to another embodiment, the invention concerns a curable liquid silicone rubber composition containing carbon nanotubes prepared according to the invention and as described above, and useful for preparing a cured silicone rubber material having a durometer from over 40 Shore A to 90 Shore A and comprising: (a) for 100 parts by weight of at least one polydiorganosiloxane A of general formula (I): [(R2)b(Alk)cSiO2 / 2]a[(Alk)(R2)2SiO1 / 2]2(I) - wherein symbols R are independently of one another selected from the group consisting of (i) unsubstituted or fluorinated C1-C20 hydrocarbon radical and (ii) phenyl radical; - wherein symbol Alk is a C2-C6alkenyl group; and preferably said alkenyl groups are chosen from the group consisting of vinyl, allyl, and hexenyl; - where b=1 or 2, c= 0 or 1 and b+c=2; and 2912909-120000 - wherein the index a>1, preferably a is from 5 to 1500, most preferably a is from 5 to 1500, c=0 and b=2, and even more preferably a is from 100 to 1200, c=0 and b=2 or a is from 100 to 1000, c=0 and b=2; (b) from 1 parts by weight to 80 parts by weight of at least one silicone resin B containing vinyl groups, preferably from 5 parts by weight to 50 parts by weight and most preferably from 10 parts by weight to 40 parts by weight; (c) from 1 part by weight to 80 parts by weight of at least one filler C preferably from 5 part by weight to 50 parts by weight and most preferably from 10 part by weight to 40 parts by weight; (d) from 1 part by weight to 60 parts by weight of at least one organosilicon crosslinker XL containing at least 3 silicon-bonded hydrogen atoms per molecule when structured as a linear molecule, or at least two silicon-bonded hydrogen atoms when it takes the form of a branched polymer, preferably from 5 parts by weight to 40 parts by weight, and most preferably from 10 parts by weight to 30 parts by weight; (e) from 0.01 parts by weight to 20 parts by weight of at least one electrically conductive filler D chosen from the group of single-walled carbon nanotubes, multi-walled carbon nanotubes, crosslinked carbon nanotubes and their corresponding blends, preferably from 0.1 part by weight to 10 parts by weight and most preferably from 0.25 part by weight to 10 parts by weight; and (f) from 0 part by weight to 40 parts by weight of at least one polydiorganosiloxane XL3 containing at least 3 silicon-bonded C2-C6alkenyl groups per polymer; (g) from 0 part by weight to 20 parts by weight of at least one diorganohydrogensiloxy-terminated polydiorganosiloxane CE1, and (h) from 0 part by weight to 20 parts by weight of at least one polydiorganosiloxane M containing a single silicon-bonded C2-C6alkenyl group per polymer. (i) a hydrosilylation catalyst E in an amount to render the composition curable by hydrosilylation reactions, preferably the hydrosilylation catalyst is provided as a catalyst masterbatch comprising at least one hydrosilylation catalyst E and at least one vinyl siloxane polymer, and more preferably said hydrosilylation catalyst is provided as a catalyst masterbatch comprising at least one platinum-based catalyst E1 and at least one vinyl siloxane polymer; (j) optionally an amount by weight of at least one cure rate controller F to slow the curing reaction, preferably from 0.01 part by weight to 10 parts by weights and (k) optionally an amount by weight of at least one additive G, preferably from 0.1 part by weight to 10 parts by weight; and said curable liquid silicone rubber composition having the following properties: • a Shore A hardness when cured from over 40 Shore A to 90 Shore A, • an uncured rheology profile characterized by a viscosity of over 1,000,000 mPa.s at a shear rate of 1 s-1and a viscosity of over 100,000 mPa.s at a shear rate of 10 s-1, preferably 2912909-120000 a viscosity of from 1,000,000 mPa.s to 5,000,000 mPa.s at a shear rate of 1 s-1and a viscosity of from 300,000 mPa.s to 800,000 mPa.s at a shear rate of 10 s1, and • when cured, a volume resistivity of less than 10 ohm-cm. In another preferred embodiment, said curable liquid silicone rubber composition having the following properties: • A Shore A hardness, when cured, ranging from over 40 Shore A up to 90 Shore A. • A Shear Thinning Index of equal to or more than 7.5, preferably equal to or more than 8.5, and even more preferably ranging from 8.5 up to 14; • An uncured viscosity at shear rate of 10 / s ranging from 400000 mPa.s to 1000000 mPa.s, preferably ranging from 500000 to 750000 mPa.s, and • When cured, a volume resistivity of less than 10 ohm-cm. The Shear Thinning Index is measured by the ratio of the viscosity of liquid composition at two different shear rates (1 / s and 10 / s). The ASTM D 2240 standard and the JIS K 7194 standard were utilized to measure the properties of the cured electroconductive silicone materials. Specifically, the ASTM D 2240 standard was used to determine the Shore A hardness of the cured material. This test method measures the hardness of a material by indenting the material with a standardized tip under a defined force. The Shore A scale, which is used for testing soft elastomers, rubber, and natural rubber, provided a measure of the hardness of the cured silicone materials. On the other hand, the JIS K 7194 standard was used to measure the volume resistivity of the cured material. This standard specifies a testing method for resistivity of electrically conductive silicone material with a four-point probe array. The resistivity is calculated based on the measured resistance, the thickness of the sample, and a correction factor. This provided a measure of how strongly the cured silicone material opposes the flow of electric current. Cured silicone slabs of about 2 mm thickness were cut into 50 mm round disks and stacked 2-ply for a sample thickness of about 4 mm. According to another embodiment, the invention concerns a curable liquid silicone rubber composition containing carbon nanotubes prepared according to the invention and as described above, and useful for preparing a cured silicone rubber material having a durometer from 10 Shore A to up to 40 Shore A and comprising: (a) for 100 parts by weight of at least one polydiorganosiloxane A of general formula (I): [(R2)b(Alk)cSiO2 / 2]a [(Alk)(R2)2SiO1 / 2]2 (I) - wherein symbols R are independently of one another selected from the group consisting of (i) unsubstituted or fluorinated C1-C20hydrocarbon radical and (ii) phenyl radical; - wherein symbol Alk is a C2-C4 alkenyl group; - where b=1 or 2, c= 0 or 1 and b+c=2; and - wherein the index a is from 1 to 1200, 2912909-120000 (b) from 1 part by weight to 80 parts by weight of at least one filler C preferably from 5 part by weight to 50 parts by weight and most preferably from 10 part by weight to 40 parts by weight; (c) from 0.01 parts by weight to 10 parts by weight of at least one organosilicon crosslinker XL containing at least 3 silicon-bonded hydrogen atoms per molecule when structured as a linear molecule, or at least two silicon-bonded hydrogen atoms when it takes the form of a branched polymer, preferably from 0.1 part by weight to 5 parts by weight, and most preferably from 0.2 part by weight to 2.5 parts by weight; (d) from 0.01 parts by weight to 20 parts by weight of at least one electrically conductive filler D chosen from the group of single-walled carbon nanotubes, multi-walled carbon nanotubes, crosslinked carbon nanotubes and their corresponding blends, preferably from 0.1 part by weight to 10 parts by weight and most preferably from 0.25 part by weight to 10 parts by weight; (e) from 0 part by weight to 15 parts by weight of at least one diorganohydrogensiloxy-terminated polydiorganosiloxane CE, and preferably from 0.1 part by weight to 15 parts by weight; (f) from 0 part by weight to 120 parts by weight of a monovinyl functional polydimethylsiloxane polymer; and (g) from 0 part by weight to 10 parts by weight of at least one polydimethylsiloxane polymer. (h) a hydrosilylation catalyst E in an amount to render the composition curable by hydrosilylation reactions, preferably the hydrosilylation catalyst is provided as a catalyst masterbatch comprising at least one hydrosilylation catalyst E and at least one vinyl siloxane polymer, and more preferably said hydrosilylation catalyst is provided as a catalyst masterbatch comprising at least one platinum-based catalyst E1 and at least one vinyl siloxane polymer; (i) optionally an amount by weight of at least one cure rate controller F to slow the curing reaction, preferably from 0.01 part by weight to 10 parts by weights and (j) optionally an amount by weight of at least one additive G, preferably from 0.1 part by weight to 10 parts by weight; and said curable liquid silicone rubber composition having the following properties: - When cured, it has a Shore A hardness ranging from 10 Shore A up to 40 Shore A; - An uncured rheology profile characterized by a viscosity of over 1,000,000 mPa.s at a shear rate of 1 s-1and a viscosity of over 100,000 mPa.s at a shear rate of 10 s-1, preferably a viscosity of from 1,000,000 mPa.s to 5,000,000 mPa.s at a shear rate of 1 s-1and a viscosity of from 300,000 mPa.s to 800,000 mPa.s at a shear rate of 10 s1, and - When cured a volume resistivity of less than 10 ohm-cm. In another preferred embodiment, said curable liquid silicone rubber composition having the following properties: • A Shore A hardness when cured from 10 Shore A up to 40 Shore A, • A Shear Thinning Index of equal to or more than 6.3, preferably equal to or more than 7.5, and even more preferably ranging from 7.5 up to 12, • An uncured viscosity at shear rate of 10 / s ranging from 300000 mPa.s to 900000 mPa.s, preferably ranging from 450000 mPa.s to 700000 mPa.s, and 2912909-120000 • when cured a volume resistivity of less than 10 ohm-cm. In a preferred embodiment, for the curable liquid silicone rubber composition containing carbon nanotubes prepared according to the invention and as described therein, and useful for preparing a cured silicone rubber material having a durometer from 10 Shore A to up to 40 Shore A , the total vinyl content linked to a silicon atom is maintained within a range of 0.03 to 0.49% by weight. Additionally, the loading of conductive filler D is kept between 0.25 to 5% by weight, relative to the total weight of the formulation. According to another embodiment, the invention concerns a two-part curable liquid silicone rubber composition useful for preparing a cured silicone rubber material having a durometer from over 40 Shore A to 90 Shore A and comprising: • A first part, which includes components (a) to (e) and optionally components (f), (g), (h), and (k), but does not include component (i). The amounts and descriptions of these components are also as specified in the invention for the silicone composition which, after curing, has a durometer ranging from over 40 Shore A to 90 Shore A; and • A second part, which includes components (a), (c), and (i), and optionally component (j), but does not include components (d), (f), and (g). The amounts and descriptions of these components are also as specified in the invention for the silicone composition which, after curing, has a durometer ranging from over 40 Shore A to 90 Shore A. According to another embodiment, the invention concerns a two-part curable liquid silicone rubber composition useful for preparing a cured silicone rubber material having a durometer from 10 Shore A to up to 40 Shore A and comprising: • a first part comprising components (a) to (e) and optionally components (f), (g), (i) and (j) but not component (h). The amounts and descriptions of these components are as specified in the invention for the silicone composition which, after curing, has a durometer ranging from 10 Shore A to 40 Shore A; and • a second part comprising components (a), (b) and (h) and optionally component (i) but not components (c) and (e). The amounts and descriptions of these components are also as specified in the invention for the silicone composition which, after curing, has a durometer ranging from 10 Shore A to 40 Shore A. According to another embodiment, the invention concerns a multi-part curable liquid silicone rubber composition useful for preparing a cured silicone rubber material having a durometer from over 40 Shore A to 90 Shore A and comprising: • a first part comprising components (a), (b), (c), (d), (e), and optionally (f), (g) and (h) according to the invention and as described therein; • a second part comprising component (i) according to the invention and as described therein; • a third part comprising component (j) according to the invention and as described therein , and • optionally a fourth part comprising component (k) according to the invention and as described therein. 2912909-120000 According to another embodiment, the invention concerns a multi-part curable liquid silicone rubber composition useful for preparing a cured silicone rubber material having a durometer from 10 Shore A to up to 40 Shore A and comprising: • a first part comprising components (a), (b), (c) and (d) and optionally, (e), (f), and (g) according to the invention and as described therein; • a second part comprising component (h) according to the invention and as described therein; • a third part comprising component (i) according to the invention and as described therein; and • optionally a fourth part comprising component (j) the invention and as described therein. According to another embodiment, the invention concerns a method for additive manufacturing an article comprising an electrically conductive silicone material comprising the steps of: 1) printing a first silicone composition prepared by combining the components of the curable liquid silicone composition according to the invention and as described above on a substrate with a 3D printer, preferably selected from an extrusion 3D printer to form a first layer, 2) printing a second silicone composition prepared by combining the components of the curable liquid silicone composition according to the invention and as described above on the first or previous layer with the said 3D printer to form a subsequent layer, 3) optionally repeating step 2) with independently selected said curable liquid silicone composition for any additional layer needed, and 4) allowing the first and subsequent layers to crosslink, optionally by heating, to obtain an article comprising an electrically conductive silicone material. Utilization of pressure in conjunction with the extrusion printer can facilitate the printing process of the material, enhancing the precision and quality of the final product. In the above embodiment, the silicone composition of the invention, which incorporates Carbon Nanotubes (CNTs), is 3D-printed. This composition may serve as a silicone-based ink used for direct ink writing of a shoe insole demonstrator with embedded piezoresistive sensors. This embodiment holds particular relevance in the context of the escalating demand for more precise and personalized health monitoring, originating not solely from the medical sector but also from athletes and sports enthusiasts. Personalized soft wearable sensing systems are under development to provide physiological health metrics over extended periods without compromising user comfort. One target application for continuous health monitoring is the analysis of gait, which can provide insight into overall health, aging, sports performance, and injury recovery. The deployment of electronic footwear, embodied in the form of socks and insoles equipped with integrated sensors, offers a robust strategy for the reliable measurement of gait, concurrently providing a superior level of comfort for the user. Insoles, by virtue of their capacity to be seamlessly and non- intrusively incorporated into a shoe, emerge as prime candidates for gait motion monitoring. The customization of the insole’s shape, position, and material affords the opportunity to not only augment the gait but also to avert potential health complications by rectifying posture and optimizing the distribution of 2912909-120000 plantar pressure. Furthermore, the performance in sports activities can be significantly enhanced through the employment of insoles characterized by adjustable stiffness and geometry. In addition to the benefits previously mentioned, the integration of such sensors into the shoe facilitates the assessment of pressure distribution and sweat analysis. This yields a comprehensive evaluation of the user’s foot health and performance metrics. The data procured from these sensors can be relayed to the user, offering real-time feedback that can be utilized to modify running technique, boost performance, and circumvent potential injuries. This multi-dimensional approach to gait analysis and improvement highlights the innovative essence and extensive applicability of this electronic footwear technology. The incorporation of sensors into cutting-edge insoles presents a formidable challenge in manufacturing. Numerous elastomeric smart plantar sensing systems have been devised with integrated mechanical sensing mechanisms, encompassing capacitive, piezoresistive, force-sensitive resistor, and triboelectric pressure sensors. Nonetheless, contemporary methodologies continue to depend on conventional manufacturing workflows, which fall short of satisfying the escalating demand for digitalization and personalization. In this context, the method provided by this invention leverages the unique properties of CNTs incorporated into the silicone material, prepared according to the invention, and the capabilities of 3D printing technologies. The silicone-based inks, containing CNTs, are meticulously designed and used for the direct ink writing of a shoe insole demonstrator with encapsulated sensors capable of measuring both normal and shear forces. By fine-tuning the material properties to match the expected plantar pressures, the patient- customized shoe insole is fully 3D printed at room temperature, enabling the measurement of in-situ gait forces during physical activity. Moreover, the digitized approach allows for rapid adaptation of the sensor layout to meet specific user needs, thereby facilitating the fabrication of improved insoles in multiple quick iterations. This method enables the precise and efficient production of articles with complex geometries and internal structures, which may not be achievable with traditional manufacturing methods. Furthermore, upon curing, the silicone composition exhibits a uniform distribution of resistivity across its surface. This uniformity is a critical feature for the reliable performance of wearable devices, ensuring consistent sensor readings and power consumption across the device. In another embodiment, the invention provides a method for additive manufacturing an article comprising an electrically conductive silicone material. This method includes the following steps: Printer Calibration: Prior to the printing process, the 3D printer is calibrated. This calibration ensures optimal performance and includes aligning the print bed, setting the nozzle temperature for optimal extrusion of the silicone composition, and adjusting the speed of the print head. Printing the First Layer: A first silicone composition is prepared by combining the components of the curable liquid silicone composition according to the invention as described above. This composition is then printed on a substrate using a 3D printer, preferably selected from an extrusion 3D printer to form a first 2912909-120000 layer. The thickness of this layer is predetermined and can affect the strength, print time, and resolution of the final product. Printing Subsequent Layers: A second silicone composition is prepared in the same manner as the first. This composition is printed on the first or previous layer with the 3D printer to form a subsequent layer. The thickness of these layers is also predetermined and consistent with the first layer. Optional Repeating of Step 3: Step 3 may be repeated with independently selected curable liquid silicone compositions for any additional layers needed. Each layer is printed with the same considerations for thickness and printer calibration as the first and second layers. It can also be added curable compositions of various hardness to vary the hardness within the same object printed. Crosslinking: The first and subsequent layers are allowed to crosslink, optionally by heating, to obtain an article comprising an electrically conductive silicone material. The crosslinking process binds the layers together and solidifies the structure of the article. This method allows for the precise and efficient production of articles with complex geometries and internal structures, which may not be achievable with traditional manufacturing methods. According to another embodiment, the invention concerns an electrically conductive silicone rubber material obtained by curing a curable liquid silicone rubber composition according to the invention and as described therein and having the following properties: • a durometer from over 40 Shore A to 90 Shore A; and • a volume resistivity of less than 10 ohm-cm. According to another embodiment, the invention concerns an electrically conductive silicone rubber material obtained by curing a curable liquid silicone rubber composition according to the invention and as described therein and having the following properties: • a durometer hardness ranging from 10 Shore A to 40 Shore A; and • a volume resistivity of less than 10 ohm-cm. It is important to note that key attributes of this material include its hardness, conductivity, and moldability. However, there is a notable scarcity of silicone rubber solutions that exhibit both low hardness and high conductivity, which are suitable for injection molding. This is primarily due to the challenges associated with formulating and processing carbon nanotube-filled silicones (CNT). The present invention addresses this gap, providing a solution that balances these key attributes effectively. The cured material demonstrates an optimal balance of flexibility and tear strength, a critical attribute considering its intended use in wearable applications that necessitate such durability. In addition to the aforementioned attributes, another significant feature of our curable silicone composition containing CNT is its excellent die-cuttability. This characteristic becomes particularly relevant when preparing small parts, as it supports a reduction in scrap during the manufacturing process. 2912909-120000 According to another embodiment, the invention concerns an article which comprises a portion of material prepared from an electrically conductive silicone rubber material according to the invention and as described above. According to another embodiment, the invention concerns a process for producing a molded silicone rubber product M1 containing carbon nanotubes via injection molding comprising the following steps: a) feeding into a base feed line the non-curable liquid silicone masterbatch that contains carbon nanotubes according to the invention and as described therein; b) feeding into a separate catalyst feed line a hydrosilylation catalyst E in an amount to render the composition curable by hydrosilylation reactions, preferably the hydrosilylation catalyst is provided as a catalyst masterbatch comprising at least one hydrosilylation catalyst E and at least one vinyl siloxane polymer, and more preferably said hydrosilylation catalyst is provided as a catalyst masterbatch comprising at least one platinum-based catalyst E1 and at least one vinyl siloxane polymer; c) optionally feeding into a separate feed line a cure rate controller F to slow the curing reaction, d) optionally feeding into a separate additive feed line at least one additive G, e) directing said non-curable liquid silicone masterbatch, said hydrosilylation catalyst E, optionally said cure rate controller F and optionally said additive G either into a mixing tank prior directing the resulting mixture into a barrel of an injection machine or directly into said barrel to obtain a curable liquid silicone rubber composition containing carbon nanotubes; and f) allowing the resulting mixture to cure, preferably by heating at a temperature ranging from 80° C to up to 220° C, so as to obtain a molded silicone rubber product M1 containing carbon nanotubes. Following the detailed description of the preferred embodiment, it is important to underscore the significant advantages this process offers. The embodiment presents a unique solution that optimizes the liquid injection molding process. Unlike traditional two-part liquid silicone rubbers, this advanced system comprises a base polymer (non-curable liquid silicone masterbatch), a catalyst polymer, and an inhibitor (also known as a cure rate controller or “control”). The base polymer is pumped through the system with the catalyst and control added via a side stream process at levels deemed most efficient to the individual molding application. By adjusting the amount of the cure rate controller, the time to cure can be increased or decreased. It gives an average reduction of cure time of 40-50%. This system also allows for complete fill of intricate mold geometries, resolving fill issues such as scorch and short shots, which can save time with process concerns. Due to the dosing process of this advanced system, lower temperatures can be utilized to achieve cure. This reduction of cure temperature, to as low as 80° C, allows for more design freedom to use additional substrates for over-molding applications, and allows for over-molding of sensitive electronics in a more efficient molding operation versus the traditional manual potting process. Another advantage of 2912909-120000 lower temperature cure is for process flexibility as it relates to thermal expansion within the mold cavity. By reducing cavity pressure, common issues such as flash can be eliminated. This advanced process can be advantageously used with two liquid silicone masterbatches with different durometers: so that they can be blended to achieve specific durometers, for example from 20 Shore A to 70 Shore A. This flexibility allows for customization of physical properties based on specific application requirements, thereby offering a versatile and efficient solution to the challenges faced in the field of electrically conductive silicone rubber material production. The injection molding process is initiated by introducing the curable liquid silicone rubber composition containing carbon nanotubes into the injection machine. This machine is equipped with a heated barrel, which uses a reciprocating screw to thoroughly mix and heat the composition, thereby facilitating the curing process. The heated and mixed composition is then injected into a mold under high pressure. This mold is designed to match the desired shape of the final silicone rubber product M1. The high pressure ensures that the composition fills and conforms to every part of the mold. Once the composition is injected, it is allowed to cool and cure within the mold. The curing process is expedited by the application of heat, preferably at a temperature ranging from 80° C to up to 220° C. This heat-induced curing solidifies the composition, transforming it into a durable silicone rubber. After the curing process is complete, the mold is opened, and the silicone rubber product M1 is ejected. The product retains the shape of the mold, featuring the unique properties imparted by the carbon nanotubes. The entire process, from the introduction of the composition to the ejection of the final product, is controlled and monitored to ensure consistency and quality in the produced silicone rubber products. Adjustments can be made to the process parameters as needed, based on the specific requirements of the product and the performance of the composition during the molding process. This detailed description of the injection molding process provides a comprehensive understanding of how the silicone rubber product M1, containing carbon nanotubes, is produced according to the present invention. It also underscores the critical role of each component and step in achieving the desired properties and performance of the final product. According to another embodiment, the invention concerns an article according to the invention and as described above which is which is a sensor, a biosensor, dental device such as a dental device, silicone dots used as an interface between a machine and skin to allow diagnostic readings, a point-of-care device, flexible electronics, a medical implant, a seal, a gasket, a connector, a device for bio-manufacturing or bio- pharma processes, a long-term implantable device for neuroscience, a device for targeted drug delivery systems, a bio-sensor, a strain sensor or piezo-resistive device for diagnostics, an antenna for radio technology, or a cable, radiation shield, light-absorption device, heat spreader, or an EMI shielding material. 2912909-120000 This embodiment of the invention, the innovative process and resulting electrically conductive silicone rubber material, which contains Carbon Nanotubes (CNTs), opens up a multitude of advantageous applications such as: - Bio-manufacturing and Bio-pharma processes: The silicone composition could be used to create sensors that monitor conditions in bio-manufacturing processes. The high sensitivity and conductivity of CNTs make them ideal for detecting minute changes in environmental conditions, which can be critical in bio-pharma processes. - Neuroscience: In the field of neuroscience, the silicone composition could be used in long-term implantable devices. The biocompatibility and flexibility of silicone, combined with the electrical conductivity of CNTs, could allow for devices that interact directly with neural tissue without causing damage or inflammation. - Detection and Drug Delivery Systems: The silicone composition could be used to create devices for targeted drug delivery. The conductivity of CNTs could be used to control the release of drugs in response to specific triggers, improving the efficacy and reducing the side effects of treatments for conditions such as Alzheimer’s and Parkinson’s diseases. - Sensors and Biosensors: The electrically conductive and biocompatible nature of the silicone rubber material makes it an ideal candidate for the creation of wearable sensors that monitor vital signs or environmental conditions. Additionally, the silicone composition could be used to create biosensors for a variety of applications. The high surface area and conductivity of CNTs make them ideal for detecting specific biological markers, which could be used in everything from medical diagnostics to athletic performance monitoring. - Diagnostics and Silicone Dots for Diagnostic Readings: In diagnostics, the silicone composition could be used to create strain sensors or piezo-resistive devices that collect bio-signals. The flexibility and conductivity of the silicone-CNT composite make it ideal for wearable devices that need to conform to the body while still accurately collecting data. Furthermore, the silicone dots can serve as an interface between a machine and skin for diagnostic readings, taking advantage of the material’s biocompatibility and electrical conductivity. - Point-of-Care Devices: The silicone rubber material can be used to create components for point-of- care devices, potentially improving their performance and durability. - Flexible Electronics: The silicone rubber material’s electrical conductivity and flexibility make it an excellent choice for applications such as flexible displays, wearable electronics, and bendable batteries. - Medical Implants: Given its biocompatibility, the silicone rubber material can be used in medical implants, with its electrical conductivity beneficial in implants that require electrical stimulation. - Radio Technology: In radio technology, the silicone composition could be used in the fabrication of antennas. The conductivity of CNTs and the flexibility of silicone could allow for antennas that are lightweight, flexible, and highly efficient. 2912909-120000 - Cables, Radiation Shields, Light-Absorption Devices, and Heat Spreaders: The silicone composition could be used in a variety of other applications due to the unique properties of CNTs. Their high thermal conductivity makes them ideal for heat spreaders, while their electrical conductivity could be used in cables and radiation shields. Their ability to absorb light could also be used in light-absorption devices. - Dental devices: The balance of hardness and flexibility in the silicone rubber material can be leveraged to produce comfortable and durable dental devices. - Automotive Applications: The silicone rubber material’s durability, resistance to extreme temperatures, and notably, its lightweight nature compared to alternative technologies, make it suitable for demanding automotive applications such as sensors, seals, gaskets, and connectors. This lightweight characteristic can contribute to overall vehicle efficiency, a critical aspect in the automotive industry. - Adaptive Camouflage: The conductive properties of the silicone composition could be utilized in hunting sport to create adaptive camouflage systems that can change color or pattern in response to environmental conditions. - Bio-Reactive Devices: The silicone composition could be used in the creation of bio-reactive devices that can interact with biological systems, potentially providing new solutions in the field of medical technology. - Electro-Adaptive Coatings: The silicone composition could be used to create coatings that can change their properties in response to electrical signals, opening up possibilities for smart surfaces and interfaces. These potential applications underscore the transformative potential and broad applicability of the present invention across various industries. COMPONENTS The polydiorganosiloxane A according to the invention is of general formula (I): [(R2)b(Alk)cSiO2 / 2]a[(Alk)(R2)2SiO1 / 2]2(I) - wherein symbols R are independently of one another selected from the group consisting of (i) unsubstituted or fluorinated C1-C20 hydrocarbon radical and (ii) phenyl radical; - wherein symbol Alk is a C2-C6alkenyl group; and preferably said alkenyl groups are chosen from the group consisting of vinyl, allyl, and hexenyl; - where b=1 or 2, c= 0 or 1 and b+c=2; and preferably b=2 and c=0 and - wherein the index a>1, preferably a is from 5 to 1500, most preferably a is from 5 to 1500, c=0 and b=2, and even more preferably a is from 100 to 1200, c=0 and b=2 or from a is from 100 to 1000, c=0 and b=2. Examples of preferred polydiorganosiloxane A according to the invention are polymers of the following formula (1): 2912909-120000 Formula in which: • R and R”, are chosen independently of one another and are monovalent saturated hydrocarbon radicals, which typically contain from 1 to 2 carbon atoms, or monovalent aromatic hydrocarbon radicals, which typically contain from 6 to 12 carbon atoms, which are unsubstituted or substituted with groups that do not interfere with curing reaction, such as halogen atoms. Preferred species of the silicon-bonded organic groups are, for example, alkyl groups such as methyl, ethyl, and propyl; halogenated alkyl groups such as 3,3,3-trifluoropropyl; and aryl groups such as phenyl; • R’ are alkenyl groups each containing from 2 to 6 carbon atoms, preferably said alkenyl groups are chosen from the group consisting of vinyl, allyl and hexenyl, and most preferably said alkenyl groups are vinyl groups, and most preferably R’ is a vinyl radical and • The index n represents a degree of polymerization, and it should be sufficient so that it achieves a viscosity of at least 10 mPa.s at 25 °C. Preferably the index n is from 5 to 1500, most preferably n is from 5 to 1500, and even more preferably n is from 100 to 1200 or from 100 to 1000. All the viscosities under consideration in the present specification correspond to a dynamic viscosity magnitude that is measured, in a manner known per se, at 25°C, to work according to the Searle principle, using a Rotational rheometer, Anton-Paar M302. As regards to fluid products, the viscosity under consideration in the present specification is the dynamic viscosity at 25°C, known as the "Newtonian" viscosity, i.e. the dynamic viscosity that is measured, in a manner known per se, at a sufficiently low shear rate gradient so that the viscosity measured is independent of the rate gradient. In embodiments of the present invention, the viscosity of polydiorganosiloxane A typically ranges from approximately 0.01 to 100 Pa.s, measured at a temperature of 25 °C. Suitable polydiorganosiloxane A include dimethylvinylsiloxy-endblocked dimethylpolysiloxanes; dimethylvinylsiloxy-endblocked methylvinylpolysiloxanes; dimethylvinylsiloxy-endblocked methylvinylphenylsiloxanes; dimethylvinylsiloxy-endblocked dimethylvinylsiloxane-methylvinylsiloxane copolymers; dimethylvinylsiloxy-endblocked dimethylsiloxane-methylphenylsiloxane copolymers; dimethylvinylsiloxy-endblocked dimethylsiloxane-diphenylsiloxane copolymers; and mixtures comprising at least one of the preceding organopolysiloxanes. In a preferred embodiment, organopolysiloxane A is chosen among the followings: dimethylvinylsiloxy-terminated polydimethylsiloxane, dimethylvinylsiloxy-terminated polymethyl-3,3,3- trifluoropropylslioxane, dimethylvinylsiloxy-terminated dimethylsiloxane-3,3,3-trifluoropropylmethylsiloxne copolymer, and dimethylvinylsiloxy- terminated dimethylsiloxane / methylphenylsiloxane copolymer. Examples of suitable silicone resin B containing vinyl groups include the following silicone resins: 2912909-120000 - MDViQ where vinyl groups are included in the D units, - MDViTQ where vinyl groups are included in the D units, - MMViQ where vinyl groups are included in a portion of the M units, - MMViTQ where vinyl groups are included in a portion of the M units, - MMViDDViQ where vinyl groups are included in a portion of the M and D units, - and mixtures thereof, with: - MVi= siloxyl unit of formula (R)2(vinyl)SiO1 / 2 - DVi= siloxyl unit of formula (R)(vinyl)SiO2 / 2 - T = siloxyl unit of formula (R)SiO3 / 2- Q = siloxyl unit of formula SiO4 / 2 - M = siloxyl unit of formula (R)3SiO1 / 2-D = siloxyl unit of formula (R)2SiO2 / 2and the R functional groups, which are identical or different, are monovalent hydrocarbon groups selected from: alkyl groups having from 1 to 8 carbon atoms inclusive, such as methyl, ethyl, propyl, and 3,3,3-trifluoropropyl groups, and aryl groups such as xylyl, tolyl, and phenyl. Preferably, the R functional groups are methyl groups. Suitable filler C may be optionally subjected to a surface treatment using a fatty acid, a fatty acid ester such as stearate, organosilanes, organosiloxanes, or organosilazanes like hexamethyl disilazane or short chain siloxane diols. Such fillers may be comprised of reinforcing fillers, non-reinforcing fillers (also known as semi-reinforcing fillers), or a combination thereof. The aforementioned fillers 'C', are optimally mineral-based, and more specifically, silica-based. Silica-based materials serve as effective reinforcing or semi-reinforcing fillers. The reinforcing silica fillers can be chosen from colloidal silicas, silica powders derived from combustion or precipitation, or a mixture of these. These powders typically exhibit an average particle size less than 0.1 μm (micrometer) and a BET specific surface area exceeding 30 m2 / g, ideally ranging between 30 and 600 m2 / g. Semi-reinforcing silica fillers, such as diatomaceous earth or crushed quartz, may also be utilized. In relation to non-silica mineral materials, they can function as semi-reinforcing mineral fillers. These non-silica fillers, which can be used independently or in conjunction, include carbon black, titanium dioxide, aluminum oxide, hydrated alumina, both expanded and unexpanded vermiculite, calcium carbonate optionally surface treated by fatty acids, zinc oxide, mica, talc, iron oxide, barium sulfate, and slaked lime. These fillers generally possess a particle size ranging between 0.001 and 300 μm (micrometers) and a BET surface area less than 100 m2 / g. In a practical but not restrictive context, the fillers used may be a mixture of quartz and silica. The fillers may undergo treatment with any appropriate substance. Another example of a suitable filler is hydrophobic silica aerogel which is a nanostructured material with high specific surface area, high porosity, low density, low dielectric constant and excellent heat insulation properties. Silica aerogels are synthesized either via supercritical drying process or via ambient 2912909-120000 pressure drying technique so as to obtain porous structure. It is now widely commercially available. Hydrophobic silica aerogel is characterized by a surface area ranging from 500 to 1500 m2 / g, alternatively of from 500 to 1200 m2 / g, in each case determined via the BET method. The hydrophobic silica aerogel may further be characterized by its porosity above 80 %, alternatively above 90%. Hydrophobic silica aerogel may have an average particle size ranging from 5 to 1000 μm, alternatively of from 5 to 100 μm, alternatively of from 5 to 25 μm as measured by means of laser light scattering. An example of hydrophobic silica aerogel is a trimethyl silylated aerogel. The hydrophobic silica aerogel maybe presents in the curable liquid silicone rubber composition in an amount of from 1 to 30 % weight relative to the total weight of the curable liquid silicone rubber. Suitable organosilicon crosslinker XL containing at least 3 silicon-bonded hydrogen atoms per molecule is an organohydrogenpolysiloxane comprising from 0.45% to 40% SiH by weight, more preferably between 0.5% to 35% SiH by weight, more preferably between 0.5% to 15% SiH by weight or between 5% to 12% SiH by weight. In some embodiments, the organosilicon crosslinker XL comprises: (i) at least 3 siloxy units of formula (XL-1) which may be identical or different: (H)(Z)eSiO(3-e) / 2 (XL-1) in which: - the symbol H represents a hydrogen atom, - the symbol Z represents an alkyl having from 1 to 8 carbon atoms inclusive, and - the symbol e is equal to 0, 1 or 2, preferably e is equal to 1 or 2; and (ii) at least one, and preferably from 1 to 550 of siloxy unit(s) of formula (XL-2): (Z)gSiO(4-g) / 2(XL-2) in which: - the symbol Z represents an alkyl having from 1 to 8 carbon atoms inclusive, and - the symbol g is equal to 0, 1, 2 or 3, preferably g is equal to 2; in which Z in XL-1 and XL-2 can be the same or different. In some embodiments, the symbol Z is selected from methyl, ethyl, propyl and 3,3,3-trifluoropropyl groups, cycloalkyl groups, and aryl groups. In some embodiments, Z is a cycloalkyl group selected from cyclohexyl, cycloheptyl, and cyclooctyl groups. In other embodiments, Z is an aryl group selected from the group consisting of xylyl, tolyl, and phenyl groups. In other embodiments, Z is a methyl group. In a preferred embodiment, the symbol “e” in XL-1 is 1 or 2. In a preferred embodiment, the symbol “g” in XL-2 is 2. In a preferred embodiment, the organosilicon crosslinker XL comprises from 3 to 60 siloxy units of formula (XL-1) and from 1 to 250 siloxy unit(s) of formula (XL-2). 2912909-120000 In some embodiments, the organosilicon crosslinker XL comprises from 3 to 60 siloxy units of formula (XL-1) and from 1 to 250 siloxy unit(s) of formula (XL-2). • As organosilicon XL which has a crosslinking function and which is of use according to the invention, mention may be made of those of formulae MHDxDHwMH, MHDxDHyM and MDxDHzM, in which formula: - MH= siloxyl unit of formula: (H)(CH3)2SiO1 / 2 - DH= siloxy unit of formula: (H)(CH3)SiO2 / 2- D = siloxyl unit of formula: (CH3)2SiO2 / 2, and - M = siloxyl unit of formula: (CH3)3SiO1 / 2, with: - x is a number between 0 and 500, preferably between 2 and 250 and even more preferentially between 5 and 80; - w is a number between 1 and 500, preferably between 1 and 250 or between 1 and 100 and even more preferentially between 1 and 70; y is a number between 2 and 500, preferably between 3 and 250 or between 2 and 100 and even more preferentially between 2 and 70; and - z is a number between 3 and 500, preferably between 3 and 250 or between 3 and 100 and even more preferentially between 3 and 70, and comprising between 0.5% and 15.0% by weight of Si-H function per polymer, preferably between 1.0% and 12.5% by weight of Si-H function per polymer, and even more preferentially between 1.5% and 10.0% by weight of Si-H function per polymer. The organosilicon crosslinker XL may have a dynamic viscosity of 5 mPa.s to 1000 mPa.s at 25°C, preferably 5 mPa.s to 500 mPa.s at 25°C, more preferably 5 mPa.s to 500 mPa.s at 25°C. The organosilicon crosslinker XL may have Si-H content of 0.5wt% to 30wt%, preferably 1.0 wt% to 12.5 wt%, more preferably 1.5wt% to 10.0 wt%, based on the total weight of organosilicon crosslinker XL. Preferably, the organopolysiloxane crosslinker XL may be trimethylsiloxy-terminated polymethylhydrogensiloxane, or dimethylhydrogen-terminated polymethylhydrogensiloxane. Examples of suitable crosslinkers XL containing at least two silicon-bonded hydrogen atoms per molecule when it is a branched polymer include but are not limited to: silicone resins MHQ comprising: (H)(CH3)2SiO1 / 2siloxy units (MH) and SiO4 / 2siloxy units (Q units), silicone resins MMHQ comprising: (CH3)3SiO1 / 2siloxy units (M), (CH3)2HSiO1 / 2siloxy units (MH) and SiO4 / 2(Q), silicone resins MHDHQ comprising: (CH3)2HSiO1 / 2 siloxy units (MH), (CH3)HSiO2 / 2 (DH) and SiO4 / 2 siloxy units (Q) and silicone resins MMHDHQ comprising: (CH3)3SiO1 / 2 units (M units), (CH3)2HSiO1 / 2 (MH), (CH3)HSiO2 / 2 (DH) and SiO4 / 2 units (Q). In an embodiment, the crosslinker XL is a MHQ silicone resin wherein MHsiloxy units is of formula R2HSiO1 / 2 and Q is a siloxy unit of formula SiO4 / 2, formulas where H is a hydrogen atom and where R is a one to forty carbon atom monovalent hydrocarbon radical, preferably a one to twenty carbon monovalent 2912909-120000 hydrocarbon radical, more preferably selected from the group consisting of methyl, ethyl, propyl, iso- propyl, n-butyl, iso-butyl, sec-butyl, tert-butyl, pentyl, hexyl, heptyl, phenyl, benzyl, and mesityl; and most preferably selected from the group consisting of methyl and phenyl. In another embodiment the crosslinker XL is a MHQ silicone resin having the formula: MHw Qz where Q has the formula SiO4 / 2and where MHhas the formula R2HSiO1 / 2, where H is a hydrogen atom and R is a one to forty carbon atom monovalent hydrocarbon radical, preferably a one to twenty carbon monovalent hydrocarbon radical, more preferably selected from the group consisting of methyl, ethyl, propyl, iso-propyl, n-butyl, iso-butyl, sec-butyl, tert-butyl, pentyl, hexyl, heptyl, phenyl, benzyl, and mesityl; and most preferably selected from the group consisting of methyl and phenyl, with the subscripts w and z having a ratio of 0.5 to 4.0 respectively, preferably 0.6 to 3.5, more preferably 0.75 to 3.0, and most preferably 1.0 to 3.0. In another embodiment the crosslinker XL is a MHQ silicone resin having the formula: (MHwQz)jwhere Q has the formula SiO4 / 2and where MHhas the formula R2HSiO1 / 2, where H is a hydrogen atom and R is a one to forty carbon atom monovalent hydrocarbon radical, preferably a one to twenty carbon monovalent hydrocarbon radical, more preferably selected from the group consisting of methyl, ethyl, propyl, iso-propyl, n-butyl, iso-butyl, sec-butyl, tert-butyl, pentyl, hexyl, heptyl, phenyl, benzyl, and mesityl; and most preferably selected from the group consisting of methyl and phenyl, with the subscripts w and z having a ratio of 0.5 to 4.0 respectively, preferably 0.6 to 3.5, more preferably 0.75 to 3.0, and most preferably 1.0 to 3.0; and the subscript j ranging from about 2.0 to about 100, preferably from about 2.0 to about 30, more preferably from about 2.0 to about 10, and most preferably from about 3.0 to about 5.0. In another embodiment, the crosslinker XL is a silicone resin having from 0.10 wt. % to 2.00 wt. % H as SiH and comprising MHsiloxy units of formula R2HSiO1 / 2 and Q siloxy unit of formula SiO4 / 2, where H is a hydrogen atom and R is a one to forty carbon atom monovalent hydrocarbon radical, preferably a one to twenty carbon monovalent hydrocarbon radical, more preferably selected from the group consisting of methyl, ethyl, propyl, iso-propyl, n-butyl, iso-butyl, sec-butyl, tert-butyl, pentyl, hexyl, heptyl, phenyl, benzyl, and mesityl; and most preferably selected from the group consisting of methyl and phenyl. Electrically conductive filler D is preferably chosen from the group of single-walled carbon nanotubes, multi-walled carbon nanotubes, crosslinked carbon nanotubes and their corresponding blends. The present invention pertains to various forms of carbon nanostructures, including Single-Walled Carbon Nanotubes (SWCNTs), Multi-Walled Carbon Nanotubes (MWCNTs), and Crosslinked Carbon Nanotubes (CCNTs). Single-Walled Carbon Nanotubes (SWCNTs) are a unique allotrope of carbon, characterized by a singular, seamless cylindrical layer of graphene. The diameters of these structures typically fall within about 0.4 to 2.22 nm range. Owing to their distinctive structure, SWCNTs exhibit remarkable mechanical strength, exceptional electrical conductivity, and superior thermal properties. Examples are TuballTMseries (in particular “TuballTMgraphene nanotubes and the series 601, 602, and 613) sold by OCSiAl company. 2912909-120000 Multi-Walled Carbon Nanotubes (MWCNTs), another form of carbon allotrope, are composed of multiple concentric cylindrical layers of graphene, forming a structure akin to nested tubes. The diameters of MWCNTs can vary, ranging from 1 to 100 nm range. MWCNTs also possess high mechanical strength and thermal stability. Their electrical properties, however, are influenced by the relative orientation of the individual graphene layers. Appropriate materials for the implementation of the present invention may include products from the NANOCYL®NC7000™ series, marketed by Nanocyl SA. These NANOCYL®products consist of thin multiwall carbon nanotubes, synthesized through the Catalytic Chemical Vapor Deposition (CCVD) process. Both SWCNTs and MWCNTs can undergo derivatization, a process that chemically modifies the nanotubes to incorporate functional groups, resulting in derivatized single-walled carbon nanotubes and derivatized multi-walled carbon nanotubes. These functional groups, which contain heteroatoms such as O, N, S, P, or halogens (F, Cl, Br, or I), are covalently bonded to a carbon atom of the nanotube wall. Examples of such functional groups include —NO3, —SO3H, —PO3H, —OH, —COOH, and —NH2. However, one experienced in the art would recognize the limitations of using these functionalized CNTs in a hydrosilylation curable silicone composition. In addition, graphenated carbon nanotubes, hybrid structures featuring a graphitic foliate covalently bonded to a sidewall of either a SWCNT or MWCNT, may also be included in the composition. Crosslinked Carbon Nanotubes (CCNTs) are a unique configuration of carbon nanostructures (CNSs) that consist of a multitude of carbon nanotubes (CNTs) interconnected in a polymeric structure. The interconnection of these CNTs can be achieved through various means such as branching, interdigitation, entanglement, or the sharing of common walls. During the preparation of the compositions described herein, operations may generate fragments of CNSs and / or fractured CNTs. These fragments, like the larger CNSs, consist of multiple CNTs that are interconnected in a polymeric structure. Fractured CNTs, derived from CNSs, are branched and share common walls with one another. It is hypothesized that these fragments of CNSs and / or fractured CNTs are produced from CNSs during one or more processing steps involved in the preparation of the systems described herein. Exemplary embodiments of this technology can be found in US-A-2023146093 or with the ATHLOS™ CARBON NANOSTRUCTURES (in particular ATHLOS™ SR1200 CNS) marketed by the Cabot Corporation. Examples of suitable polydiorganosiloxane XL3 include trimethylsiloxy-endblocked methylvinylpolysiloxanes, dimethylvinylsiloxy-endblocked methylvinylpolysiloxanes; dimethylvinylsiloxy- endblocked methylvinylphenylsiloxanes; dimethylvinylsiloxy-endblocked dimethylvinylsiloxane- methylvinylsiloxane copolymers and mixtures comprising at least one of the preceding organopolysiloxanes. The viscosity of polydiorganosiloxane XL3 typically ranges from approximately 0.01 to 100 Pa.s, measured at a temperature of 25 °C. In accordance with the present invention, the component diorganohydrogensiloxy-terminated polydiorganosiloxane CE1, also referred to as the "chain extender" or simply "extender," is an 2912909-120000 organopolysiloxane which is characterized by the presence of exactly two terminal-hydrogen atoms, each bonded to a silicon (Si) atom, located at each end of the polymer chain. The diorganohydrogensiloxy-terminated polydiorganosiloxane chain extender CE1, as per the invention, may comprise: ● Two siloxyl end units, which may be identical or different, of formula (CE1-1): (H)(R1)2SiO1 / 2wherein R1represents a C1to C8alkyl group or a C6to C10aryl group, and H denotes a hydrogen atom. ● At least one siloxyl unit of formula (CE1-2): (R2)2SiO2 / 2 wherein R2signifies a C1 to C8 alkyl group or a C6to C10aryl group. Preferably, the chain extender CE1 contains, per polymer, two siloxyl units of formula (CE1-1) and at least one siloxyl unit of formula (CE1-2). Exemplary organopolysiloxane CE1 includes polydimethylsiloxanes with dimethylhydrosilyl end groups. These have a dynamic viscosity at 25°C ranging from 1 mPa.s to 1000 mPa.s, preferably between 5 mPa.s and 500 mPa.s, and most preferentially between 5 mPa.s and 300 mPa.s. Particularly advantageous organopolysiloxanes CE conform to the formula MHDxMH, where: - MHrepresents a siloxyl unit of formula: (H)(CH3)2SiO1 / 2 - D represents a siloxyl unit of formula: (CH3)2SiO2 / 2- and x is an integer between 1 and 200, preferably between 1 and 150, and most preferentially between 3 and 120. The organopolysiloxane CE1 is termed a "chain extender" due to its presumed role in increasing the mesh size of the network during crosslinking when the SiH reactive functions are at the chain end. The component CE1 may exhibit a dynamic viscosity at 25°C ranging from 1 mPa.s to 1000 mPa.s, preferably 5 mPa.s to 500 mPa.s, and most preferably 5 mPa.s to 300 mPa.s. The component CE1 may have a Si-H content ranging from 0.2wt% to 10wt%, preferably 0.3wt% to 8.0wt%, and most preferably 0.4wt% to 6.0wt%, based on the total weight of component CE1. Preferably, the organopolysiloxane extender CE1 may be a dimethylhydrogen-terminated polydimethylsiloxane. In embodiments of the present invention, the component, referred to as polydiorganosiloxane M contains a single silicon-bonded C2-C6alkenyl group per polymer. This component exhibits a dynamic viscosity of less than or equal to 150000 mPa-s. The viscosity preferably falls within the range of 20 to 100000 mPa-s, and more preferably, it is within the range of 20 to 1000 mPa-s. In accordance with the present invention, a hydrosilylation catalyst, denoted as E, is incorporated in a quantity sufficient to render the composition curable via hydrosilylation reactions. 2912909-120000 A person skilled in the art will understand that the quantity of the catalyst to be incorporated can be judiciously determined based on the specific reaction conditions and objectives. Such determination falls within the purview of routine experimentation for a skilled artisan, without necessitating undue experimentation. Preferably, the hydrosilylation catalyst is supplied as a catalyst masterbatch, comprising at least one hydrosilylation catalyst E and at least one vinyl siloxane polymer. Preferably, the hydrosilylation catalyst is provided as a catalyst masterbatch that includes at least one platinum-based catalyst, denoted as E1, and at least one vinyl siloxane polymer. Suitable catalysts encompass hydrosilylation catalysts such as Karstedt’s catalyst, as disclosed in U.S. Pat. No.3,715,334, or other platinum catalysts known to those skilled in the art. The scope of suitable catalysts also extends to microencapsulated hydrosilylation catalysts, for instance, those disclosed in U.S. Pat. No.5,009,957. The catalyst may optionally be combined with an inert or active support. Preferred catalysts encompass platinum-type catalysts such as chloroplatinic acid, alcohol solutions of chloroplatinic acid, complexes of platinum and olefins, complexes of platinum and 1,3-divinyl-1,1,3,3- tetramethyldisiloxane (known as Karstedt catalyst), and powders on which platinum is supported, Speier’s catalyst complex, H[(C3H6)PtCl3] in isopropanol, H2PtCl6, Speier’s Zeise-type dimer (C3H6)2Pt2Cl4. Ashby’s catalyst, tetramethyl tetravinyl cyclotetrasiloxane platinum(0) (CAS: 68585-32-0), Marko’s catalyst and other Pt-carbene type catalysts, among others. These platinum catalysts are extensively described in the literature and have been found to be particularly effective. Specifically, the complexes of platinum and an organic product, as described in U.S. Pat. Nos. 3,159,601, 3,159,602, and 3,220,972, and European Patents EP-A-057,459, EP-188,978, and EP-A- 190,530, may be mentioned. Additionally, the complexes of platinum and vinylated organopolysiloxane, as described in U.S. Pat. Nos. 3,419,593, 3,715,334, 3,377,432, 3,814,730, and 3,775,452, may also be utilized. In accordance with the present invention, the component referred to as the cure rate controller F serves as an inhibitor for hydrosilylation reactions. Its primary function is to decelerate the curing reaction, thereby providing greater control over the reaction rate. Cure rate controllers are well known in the art and examples of such materials can be found in U.S. Patents. U.S. Patent 3,923,705 refers to the use of vinyl contained cyclic siloxanes. U.S. Patent 3,445,420 describes the use of acetylenic alcohols. U.S Patent 3,188,299 shows the effectiveness of heterocyclic amines. U.S. Patent 4,256,870 describes alkyl maleates used to control cure. Olefinic siloxanes can also be used as described in U.S. Patent 3,989,667. Polydiorganosiloxanes containing vinyl radicals have also been used and this art can be seen in U.S. Patents 3.498,945, 4,256,870, and 4,347, 346. Preferred inhibitors for this composition are 1,3,5,7- tetramethyl-1,3,5,7-tetravinyl-cyclotetrasiloxane; 3-methyl-1-butyn-3-ol, 2-methyl-3-butyn-2-ol, 3-butyn-1- ol, 3-butyn-2-ol, propargylalcohol, 2-phenyl-2-propyn-1-ol, 3, 5-dimethyl-1-hexyn-3-ol, 1- ethynylcyclopentanol, 1-phenyl-2-propynol, 3-methyl-1-penten-4-yn-3-ol, 1-ethynyl-1-cyclohexanol (ECH) and mixtures thereof, with the most preferred being the 1-ethynyl-1-cyclohexanol (ECH). 2912909-120000 Additional suitable inhibitor classes include hydrazines, triazoles, phosphines, mercaptans, organic nitrogen compounds, acetylenic alcohols, silylated acetylenic alcohols, maleates, fumarates, ethylenically or aromatically unsaturated amides, ethylenically unsaturated isocyanates, olefinic siloxanes, unsaturated hydrocarbon monoesters and diesters, conjugated ene-ynes, hydroperoxides, nitriles and diaziridines. In a preferred embodiment of the invention, the cure rate controller F is selected from the group consisting of 1-ethynyl-1-cyclohexanol, 2-methyl-3-butyn-2-ol, 3-butyn-1-ol, 3-butyn-2-ol, propargylalcohol, 2-phenyl-2-propyn-1-ol, 3,5-dimethyl-1-hexyn-3-ol, 1-ethynylcyclopentanol, 1-phenyl-2- propynol, 3-methyl-1-penten-4-yn-3-ol, and mixtures thereof. Typical additives G useful for the invention include UV light stabilizers, wetting agent, compression set additive, plasticizer, self-bonding additives, anti-microbial additives, heat stabilizers, flame retardants, adhesion promoters, thermally conductive fillers, non-conductive fillers, lubricants, antistatic additives, low compression set additives, durometer adjustment additives, low coefficient of friction additives (such as tung oil), oil resistance additives, anti-crepe hardening additives, mold release additives, plasticizers, thickening or consistency increase additives, and combinations thereof. Examples of heat stabilizers include iron oxides and carbon blacks, Iron carboxylate salts, cerium hydrate, titanium dioxide, barium zirconate, cerium and zirconium octoates, and porphyrins. Flame retardants may include for example, carbon black, hydrated aluminum hydroxide, magnesium hydroxide, huntite / hydromagnesite blends, zinc borate and silicates such as wollastonite, platinum and platinum compounds and mixtures or derivatives thereof. Aluminium trihydrate (ATH) is a common flame retardant. It decomposes when heated above 180-200°C at which point it absorbs heat and releases water to quench the flame. Magnesium hydroxide (MDH) has a higher thermal stability than ATH. Endothermic (heat absorbing) decomposition starts at 300°C whereupon water is released which could act as a fire retardant. Huntite / Hydromagnesite blends (Mg3Ca(CO3)4 / Mg5(CO3)4(OH)2·4H2O). Huntite and hydromagnesite occur, almost invariably, as mixtures in nature. The hydromagnesite starts to decompose between 220°C (open air) and 250°C (under pressure in an extruder), which is high enough so that it can be used as a flame retardant. The hydromagnesite gives off water and absorbs heat, much like ATH and MDH do. In contrast, the huntite decomposes above 400°C, absorbing heat but liberating carbon dioxide. Examples of non-conductive fillers include quartz powder, diatomaceous earth, talc, clay, alumina, mica, calcium carbonate, magnesium carbonate, hollow glass and in particular hollow glass beads such as hollow borosilicate glass microspheres also known as glass bubbles or glass microbubbles, glass fiber, hollow resin and plated powder, and mixtures or derivatives thereof. However, the use of these non- conductive fillers should be judiciously controlled. The quantity and type of filler used must be carefully calibrated to achieve the targeted electrical resistivity of the final product. Overuse or inappropriate selection of these fillers could potentially compromise the desired electrical properties of the material. Examples of adhesion promoters include aluminum, titanium and zirconium chelates and silanes such as 3-glycidoxypropyl trimethoxysilane, 3-glycidoxypropyl triethoxysilane, 3-glycidoxypropyl methyldimethoxysilane, 4-glycidoxybutyl trimethoxysilane, 5, 6-epoxyhexyl triethoxysilane, 2- (3, 4- epoxycyclohexyl) ethyltrimethoxysilane, 2- (3, 4-epoxycyclohexyl) ethyltriethoxysilane, methacryloxymethyl-trimethoxysilane, 3-methacryloxypropyl-tirmethoxysilane, 3-methacryloxypropyl- 2912909-120000 methyldimethoxysilane, 3-methacryloxypropyl-dimethylmethoxysilane, 3-methacryloxypropyl- triethoxysilane, 3-methacryloxypropyl-methyldiethoxysilane, 3- methacryloxyisobutyl-trimethoxysilane, 3- acryloxypropyl-trimethoxysilane, 3-acryloxypropyl-methyldimethoxysilane, 3-acryloxypropyl-dimethyl- methoxysilane and 3-acryloxypropyl-triethoxysilane, and mixtures thereof. EXAMPLES 1) Definition of the ingredients - Component (A): Polydimethylsiloxane with dimethylvinylsiloxy groups present at the terminal ends (viscosity around 100000 mPa.s and weight-average molecular weight (Mw) around 84500 g / mol). - Component (B): Polydimethylsiloxane with dimethylvinylsiloxy groups present at the terminal ends (viscosity around 60000 mPa.s). - Component (C): Polydimethylsiloxane with dimethylvinylsiloxy groups present at the terminal ends (viscosity around 3500 mPa.s and weight-average molecular weight (Mw) around 24195 g / mol). - Component (C-1): Polydimethylsiloxane with one dimethylvinylsiloxy groups present (viscosity around 400-600 mPa.s, weight-average molecular weight (Mw) from 15000 to 20000 g / mol, MCR-25 sold by Gelest) - Component (C-2): Polydimethylsiloxane with one dimethylvinylsiloxy groups present (viscosity around 2000 mPa.s - LSR 30 base available from Elkem Silicones USA corp. containing polydimethylsiloxane with dimethylvinylsiloxy groups present at the terminal ends and silica. Component (E): silicone resin of formula MMViQ with: • M = siloxyl unit of formula (CH3)3SiO1 / 2 • MVi= siloxyl unit of formula (CH3)2(vinyl)SiO1 / 2 • Q = siloxyl unit of formula SiO4 / 2 - Component (F) % by weight= 40%wt. component (E) + 40%wt. component (B) + 20%wt. component (C). - Component (G): α,ω-Dimethylhydrogenosiloxane end-blocked poly(dimethyl) (hydrogenomethyl) siloxane having a viscosity of around 22 mPa.s (weight-average molecular weight (Mw) around 2490 g / mol). - Component (H): α,ω-Dimethylhydrogenosiloxane end-blocked poly(dimethyl) (hydrogenomethyl) siloxane having a viscosity of around 8.5 mPa.s (weight-average molecular weight (Mw) around 950 g / mol). - Component (I): α,ω-Dimethylhydrogenosiloxane end-blocked polydimethylsiloxane having a viscosity of around 275 mPa.s (weight-average molecular weight (Mw) around 11000 g / mol). - MWCNT: Multi-walled carbon nanotubes MWCNT, NanocylTMNC7000 (average diameter 9.5 nm, average length 1.5 μm; surface area 250-300 m² / g and volume resistivity 10-4W.cm). 2912909-120000 - CCNTs: Crosslinked Carbon Nanotubes (CCNTs) , ATHLOS™ SR1200 CNS marketed by the Cabot Corporation; Pellet Size ~5 mm (L) x 1 mm (D); Bulk Density 0.135 g / cm3(ASTM D7481), Surface Area 200 m2 / g (ASTM D6556) and % Carbon >97%. - SWCNT1: Single-walled carbon nanotubes, TUBALL™ MATRIX 601TMgraphene nanotubes in vinyl- terminated polydimethylsiloxane carrier and marketed OCSiAl company. - LSR Select Control: cure rate controller (LSR SELECT CONTROL from Elkem Silicones USA Corp.). - LSR SELECT CATA: a catalyst masterbatch containing platinum catalyst (from Elkem Silicones USA Corp.). Formulations Table 1: Components used in Formulation n°1. Table 2: Components used in Formulation n°2 and n°2B . Example 1 1. Preparation of Polymer Masterbatch Polymer masterbatches were prepared utilizing a Schold’s mixer. The first mixture, denoted as A1, comprised the LSR Base and components (F), (G), and (I) in the quantities specified in Table 1 (Formulation n°1). Two additional mixtures were prepared: Mixture A2, which consisted of the LSR Base 2912909-120000 and components (B), (G), and (H), and Mixture A3, which included the LSR Base and components (C1), (G), and (H). The details of these mixtures are provided in Table 2. 2. Incorporation of Carbon Nanotubes into the Polymer Masterbatch The resulting Mixture A1, with a viscosity of 70,000 mPa.s, was placed in a FlackTek SpeedMixer®. A quantity of carbon nanotubes (MWCNT), as per Table 1, was then added. The mixing conditions adhered to were as follows: 2000 RPM, a container radius of 0.04 m, a shear rate for the second axis of 8.41 / s, and a shear stress of 586.4 Pa. The resulting Mixtures A2 and A3 were processed under identical conditions, with the added components detailed in Table 2. Example 2: Inventive Test n°1 (Inv. Test n°1) A 3RM apparatus is provided. The apparatus comprises a first roll (feed roll), a second roll (center roll), and a third roll (apron roll), each with diameters of approximately 0.08 m. The polymer masterbatch A1 mixture, containing MWCNT as prepared in Example 1 (Formulation 1), is introduced into the first gap between the feed roll and the center roll. A specific set of shear stress and shear rate conditions are applied. The composition is then passed through the second gap between the center roll and the apron roll. At this stage, a second set of shear stress and shear rate conditions are applied to further facilitate the breakdown and disentanglement of the carbon nanotube agglomerates. This completes the first cycle of the process, also known as Pass No.1. The distances between rolls 1 and 2, as well as between rolls 2 and 3, diminish after each pass. This adjustment in the apparatus setup allows for more efficient processing and better dispersion of the carbon nanotubes within the silicone composition. The parameters for each pass, including the speeds and velocities of the rollers, the gap widths between the rollers, and the shear rates and stresses applied, are detailed in the following table (Table 3). Table 3. Process parameters for mixing with 3 roll-mill apparatus 2912909-120000 A sample of the CNT masterbatch was collected after each pass. Components of LSR Select Control and LSR Select Cata were then added to the resulting mixture. This was done using a FlackTekTMmixer at a speed of 2000 rpm for 30 seconds for each component. The specific amounts of each component added are detailed in Table 1. The resulting mixtures were cured in a compression mold for 60 min at 150 °C. These cured slabs were then assessed for physical properties performance. An analysis utilizing Scanning Electron Microscopy (SEM) was performed to assess the dispersion quality of the Carbon Nanotube (CNT) filler. An approximate particle count was determined, quantifying the number of filler aggregates present and establishing the size range of these aggregates. This determination was facilitated by the use of 35x zoom images captured with a Hitachi TM4000 electron microscope (see Figures 7 & 8). The images were subsequently analyzed to yield the following information: • Particle / Aggregate Count: This refers to an approximate count of the number of filler aggregates present in each sample. This count serves to provide insight into the concentration of filler aggregates within the samples. • Size Range of Aggregates: This refers to the dimensions of the largest and smallest aggregate present in each sample. This range offers valuable information about the dispersion and distribution of the filler aggregates within the samples Table 4. Particle / aggregate count & Size range of aggregates – after Pass 1 & 4 Components of LSR Select Control and LSR Select Cata were then added to the resulting mixture. This was done using a FlackTekTMmixer at a speed of 2000 rpm for 30 seconds for each component. The specific amounts of each component added are detailed in Table 1 for Inv. Test N°1 and in Table 2 for Inv. Tests N°4 and N°5. The resulting mixtures were cured to assess the properties of the cured materials (see Example 7 for Inv. Test n°1 and Example 9 for Inv. Tests n°4 and 5). Example 3: Comparative Test n°1 (Comp. test n°1) A 3RM apparatus is provided. The apparatus comprises a first roll (feed roll), a second roll (center roll), and a third roll (apron roll) with diameters of approximately 0.05 m. The mixture of polymer masterbatch A1 containing MWCNT is introduced into the first gap between the feed roll and the center roll. A specific set of shear stress and shear rate conditions are applied to initiate the breakdown and disentanglement of the carbon nanotube agglomerates. The composition is then passed through the second gap between the center roll and the apron roll. At this stage, a second set of shear stress and shear rate conditions are applied to further facilitate the breakdown and disentanglement of the carbon nanotube agglomerates. This completes the first cycle of the process, also known as Pass number 1. The distances between rolls 1 and 2, as well as between rolls 2 and 3, are not modified for the following passes (total of 4 passes). 2912909-120000 Components of LSR Select Control and LSR Select Cata were then added to the resulting mixture. This was done using a FlackTekTMmixer at a speed of 2000 rpm for 30 seconds for each component. The resulting mixture was cured in a compression mold for 60 min at 150 °C. The cured slab was then assessed for physical properties performance. Example 4: Comparative test n°2 (Comp. test n°2) The mixture of the polymer masterbatch A1 containing MWCNT is first wet-out according to Example 1 and then mixed through a cavitation process. It is introduced into a cavitation apparatus. This apparatus uses the principle of cavitation which involves creating a rapid change in pressure within the liquid silicone composition, which leads to the formation of vapor-filled cavities or "bubbles". These bubbles collapse when subjected to higher pressure, generating shock waves that help to break down the CNT agglomerates. Components of LSR Select Control and LSR Select Cata were then added to the resulting mixture. This was done using a FlackTekTMmixer at a speed of 2000 rpm for 30 seconds for each component. The specific amounts of each component added are detailed in Table 1. The resulting mixtures were cured in a compression mold for 60 min at 150 °C. The cured slab was then assessed for physical properties performance. Example 5: Inventive test n°2 (Inv. test n°2) The resulting mixture of Example 4 is then subjected to the same mixing process as described in Example 2. Components of LSR Select Control and LSR Select Cata were then added to the resulting mixture. This was done using a FlackTekTMmixer at a speed of 2000 rpm for 30 seconds for each component. The specific amounts of each component added are detailed in Table 1. The resulting mixture was cured in a compression mold for 60 min at 150 °C. The cured slab was then assessed for physical properties performance. Example 6: Comparative test n°3 (Comp. test n°3) To the resulting mixture A1 of Example 1 which contains MWCNT was added components of LSR Select Control and LSR Select Cata. The mixture was not processed through 3RM apparatus but with a FlackTekTMmixer at a speed of 2000 rpm for 30 seconds. The specific amounts of each component added are detailed in Table 1. The resulting mixture was cured in a compression mold for 60 min at 150 °C. The cured slab was then assessed for physical properties performance. Example 7: Results In the following section, we present the results of various tests conducted on both comparative and inventive examples. The tests were carried out to evaluate the properties of the uncured silicone formulations and the corresponding cured silicone materials. The properties evaluated include Durometer (Shore A), Volume Resistivity, Tensile Strength, Elongation, Tear Strength, Modulus at 100% elongation, Specific Gravity, Viscosites at different shear rates (1 / s and 10 / s), and the Shear Thinning Index. The Shear Thinning Index is a measure that quantifies the degree of shear thinning behavior in a fluid. It 2912909-120000 is calculated as the ratio of the fluid’s viscosity at a shear rate of 1 / s to its viscosity at a shear rate of 10 / s. The test methods used for each property are specified in Table 4. Table 5. Properties of the uncured silicone formulations and the corresponding cured silicone materials. The viscosities under consideration correspond to a dynamic viscosity magnitude that is measured, in a manner known per se to work according to the Searle principle, at 25 °C, using a Rotational rheometer, Anton-Paar M302. Viscosity was determined using a flow curve whereby the shear rate is increased stepwise, and the resulting shear stress is measured. The compositions described herein can be described as shear thinning. This means the material’s viscosity becomes lower at higher shear rate. One of the key findings from these tests is the Volume Resistivity. All the volume resistivities measured for examples according to the invention are below 10 ohm-cm. This is a significant improvement over the comparative tests, where the volume resistivities are all above 10 ohm-cm. Lower volume resistivity indicates better electrical conductivity, which is beneficial in applications where electrical conductivity of the silicone masterbatch is important. 2912909-120000 It is noteworthy to mention that achieving such low resistivity is particularly challenging when silica is present. Given that our invention also incorporates a substantial amount of silica, the results obtained are not only impressive but also unexpected, thereby underscoring the innovative nature of our invention. Furthermore, it is important to highlight the observed relationship between the shear thinning index and resistivity. As the dispersion of the CNTs improves, the shear thinning index increases concurrently with a decrease in volume resistivity. Specifically, for high durometer materials, a shear thinning index greater than 7.5 coincides with a volume resistivity of less than 10 ohm-cm. This correlation underscores the effectiveness of our invention in achieving both optimal dispersion of CNTs and desirable electrical properties. The Shear Thinning Index (STI) serves as a quantifiable measure of the degree of shear thinning exhibited by a fluid. Shear thinning, a characteristic behavior of certain non-Newtonian fluids, is a phenomenon wherein the viscosity of the fluid decreases under shear strain. This behavior is frequently observed in polymer solutions and molten polymers. In the context of the inventive silicone compositions, a higher STI is indicative of a more pronounced degree of shear thinning. This property is particularly desirable in the processing of the silicone compositions, especially in applications that involve extrusion or injection molding. When the silicone composition is subjected to shear stress, such as during extrusion through a die or injection into a mold, the viscosity of the composition decreases. This facilitates the flow of the material, making it easier to process and shape into the desired form. Once the shear stress is removed, the viscosity of the silicone composition increases, helping the material to retain its shape. Therefore, the higher STI of the inventive silicone compositions, as evidenced by the test results, is a testament to their superior processability compared to the comparative examples. This property, along with the other advantageous properties demonstrated by the inventive examples, underscores the novelty and utility of the present invention Example 8 In this embodiment, samples were obtained after each step of the milling process (after wet-out, and after passes 1-4) and then the components of LSR Select Control and LSR Select Cata were added to the resulting mixtures. This was done using a FlackTekTMmixer at a speed of 2000 rpm for 30 seconds for each component. The specific amounts of each component added are detailed in Table 1. The resulting mixtures were cured in a compression mold for 60 min at 150 °C as delineated in Examples 2 and 3. The cured slabs were then subjected to scrutiny utilizing Scanning Electron Microscopy (SEM) and Energy- Dispersive X-ray Spectroscopy (EDX), an analytical modality employed for elemental analysis or chemical characterization of a specimen. This modality is particularly germane in the context of the present invention, which encompasses a silicone matrix containing Carbon Nanotubes (CNTs). EDX operates on the principle of ejecting ‘core’ electrons from an atom utilizing high energy electromagnetic radiation (X-rays), a phenomenon known as Moseley’s Law. The energy liberated during the relaxation process subsequent to electron ejection is unique to each element on the periodic table. 2912909-120000 Thus, bombarding a specimen with X-rays can be utilized to identify the elements present in the specimen, as well as the proportion in which they are present. In the context of the present invention, the EDX modality is utilized to monitor the dispersion of CNTs in the silicone matrix throughout the milling operation. Notably, both spherical and tubular objects were identified in the silicone masterbatch. This is achieved by monitoring the Carbon percentage in the specimen at various stages of processing. The data procured from the EDX analysis is presented in Table 4, with each row representing the atomic percentages of Silicon, Oxygen, and Carbon at a specific stage of the milling operation. Table 6. Summary table for the elemental composition of objects observed in silicone masterbatch. Figures 1, 2 and 3 display scanning electron microscopy photographs (apparatus TM4000 series from Hitachi, accelerating voltage = 15 kilovolts (kV)) taken from samples of Example 1 after the wet-out process but no milling step. Some spherical and tubular carbon-based objects are observed in the imaging. EDX elemental analysis shows that the spherical and tubular objects in the images have higher carbon content than the silicone matrix. Table 7. EDX element analysis of samples of Example 1 after the wet-out process but no milling step. Figures 4 and 5 display scanning electron microscopy photographs taken from samples of Example 2 according to the invention after pass n°4. A few spherical and tubular objects were identified within the images. EDX elemental analysis shows that the spherical and tubular objects in the images have higher carbon content than the silicone matrix. 2912909-120000 Table 8. EDX element analysis of samples of Example 2 according to the invention after pass n°4. Upon examination of Tables 7 and 8, it is observed that the Carbon atomic percentage in the matrix only (silicone polymer) and on-object (spherical and tubular objects indicative of carbon nanotubes) varies between the samples from Example 1 (no milling process) and Example 2 (according to the invention). Example 9: Inv. Test n°4 & n°5 Mixtures of polymer masterbatch A2 and A3, containing MWCNT (as per the formulation in Table 2 (Formulation 2 = Inv. Test n°4 and 2B= Inv. Test n°5) prepared in Example 1, were processed in accordance with Example 2. This involved 4 passes under the conditions specified in Table 3. The properties of both the cured and uncured materials are detailed in Table 9 below. Table 9. Properties of the uncured silicone formulations and the corresponding cured silicone materials. Example 10: Inv. Test n° 6 & Inv. Test n°6B A mixture of polymer masterbatch A4, containing CCNTs, the LSR Base, and components (F), (G), and (I) (as detailed in Table 10 below), was processed in accordance with Example 2. This involved 4 passes under the conditions specified in Table 3. 2912909-120000 Table 10: Components used in formulation. Following the addition of LSR Select Control and LSR Select Cata, as per the specifications in Table 10, the properties of the cured material are detailed in Table 11 below. Table 11. Properties of the uncured silicone formulations and the corresponding cured silicone materials. Example 11: Inv. Test n°7 A formulation was prepared by mixing Parts A and B (as detailed in Table 12) in quantities sufficient to achieve a SiH / SiVinyl ratio of 2. Table 12: Components used in formulation. Subsequently, LSR Select Control and LSR Select Cata were added at 3% by weight and 1.0% by weight, respectively. The resulting mixture was processed in accordance with Example 2, involving 4 passes under the conditions specified in Table 3. The properties of the cured material are detailed in Table 13 below. Table 13. Properties of the uncured silicone formulations and the corresponding cured silicone materials. 2912909-120000 Example 12: Comparative Rheological Analysis of four Formulations: Comp. Test n°1 (from Example 3) and Inv. test n°1 (from Example 2 and after Pass n°4). This study presents a comparative rheological analysis of two formulations: Comparative Test n°1 (from Example 3), Inventive Test n°1 (from Example 2 and after Pass n°4). Inv.test n)8 and Inv. Test 9 are prepared from Example 2 (after Pass n°4) but by modifying contents of some component according to the invention. The analysis was conducted prior to the addition of the LSR Select catalyst and control (non- curable masterbatches). Methodology: The shear rate (γ; s-1) is defined by Equation 1.^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^^^.^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^,^^^^ (^^^^−^^^^) = ^^^^^^^^^^^^ Where: • dV = difference in linear velocity between the two roller surfaces (m / s) • h = gap between the rollers (m) For a 2 or 3-roll milling process, Equation 1 can be rewritten as Equation 2. Where: • D1 = Diameter of a first roller (m) • D2 = Diameter of a second roller (m) • RPM1 = Rotational speed of the first roller (1 / min) • RPM2= Rotational speed of the second roller (1 / min) • h = Gap between the two rollers. For a 3RM, the gap between roller 1 & roller 2 or roller 2 & roller 3. (m) For the inventive and comparative material, viscosity versus shear rate (ranging from 1 / s to 100 / s) was determined via the Anton Paar rheometer under the conditions described previously. Using the experimental data, a log-log plot of viscosity (µ) versus shear rate (g) was established to determine the materials in-process dynamic viscosity (μ; Pa.s). The viscosity versus shear rate plot was transformed into a log-log plot from which the coefficients a and b were derived from a linear best fit of the log-log transformed viscosity versus shear rate curve. The coefficients a and b describe the slope and y- intercept of the viscosity (µ) versus shear rate (g) curve respectively for each material. Shear stress (t, Pa) is defined by Equation 3. ^^^^^^^^^^^^ ^^^^.^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^, ^^^^ (^^^^^^^^) = ^^^^ ∗ ^^^^Where: 2912909-120000 • γ is the shear rate (s-1) • µ = material dynamic viscosity (Pa.s) When Equation 2 is substituted into Equation 3, along with the dynamic viscosity µ, Equation 4 is derived. This allows for the estimation of the in-process shear stress at each shear rate for a specific material. This method is particularly important due to the shear thinning properties of the materials, for which viscosity decreases as the shear rate increases.^^^^^^^^^^^^ ^^^^.^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^, ^^^^ (^^^^^^^^) = (^^^^^^^^^^^^^ ∗ ^^^^^^^^^ ) ∗ ^^^^Where: • a = slope • b = y-intercept from the linearized log-log viscosity versus shear rate plots for each material. The following results were determined and quoted in Table 14. Table 14. As a preferred embodiment, formulations prepared according to the process of the invention would have the following values for the slope a and the intercept b as described above and by Figure 6: • a = slope : from -0.85 to -0.95; and • b = y-intercept: from 3.53 to 3.96.

Claims

2912909-120000 The invention claimed is: Claim 1. A process for producing a liquid silicone masterbatch containing carbon nanotubes, comprising the steps of: 1) providing a liquid silicone composition containing carbon nanotubes agglomerates; 2) optionally pre-mixing the carbon nanotubes in the liquid silicone composition using a suitable mixer, such as a high-speed mixer or a planetary mixer, to wet out the carbon nanotubes by applying a suitable level of shear stress; and most preferably pre-mixing the components with a planetary mixer or a Schold's Mixer; 3) providing a mixing apparatus; 4) mixing the liquid silicone composition containing the carbon nanotube agglomerates by applying a shear stress at a sufficient level to initiate the breakdown and disentanglement of the carbon nanotube agglomerates, 5) reprocessing the resulting mixture by repeating step 4) with the following additional conditions: the shear stress is increased, and to complete a second cycle, 6) optionally reprocessing at least once the resulting mixture of the preceding step with the following additional conditions: the shear stress is increased, and to complete another cycle; 7) optionally reprocessing at least once the resulting mixture of the preceding step by maintaining, increasing, or diminishing the shear stresses to complete final cycle(s); and 8) recovering the liquid silicone composition containing carbon nanotubes. Claim 2. A process according to claim 1 wherein in step 4) mixing the liquid silicone composition containing the carbon nanotube agglomerates is accomplished by applying a shear rate of at least 5000 (1 / s), preferably at least 10000 (1 / s), and even more preferably 15000 (1 / s), under conditions that initiate the breakdown and disentanglement of the carbon nanotube agglomerates, and in step 5) a shear rate of at least 10000 (1 / s), preferably at least 20000 (1 / s), and even more preferably 30000 (1 / s), under conditions that further disperse the carbon nanotubes within the silicone composition. Claim 3. A process according to claim 1 for producing a non-curable liquid silicone masterbatch containing carbon nanotubes, comprising the steps of: 1) providing a non-curable liquid silicone masterbatch containing carbon nanotubes agglomerates; 2) optionally pre-mixing the carbon nanotubes in the liquid silicone composition using a suitable mixer, such as a high-speed mixer or a planetary mixer, to wet out the carbon nanotubes by applying a suitable level of shear stress; and most preferably pre-mixing the components with a planetary mixer or a Schold's Mixer; 3) providing a 3-roll mill apparatus:2912909-120000 i. comprising a first roll (feed roll), a second roll (center roll) and a third roll (apron roll) with diameters of at least 0.05 m, preferably with diameters from 0.05 m to 0.80 m, ii. regulating the rotation speed of the rolls such that the apron roll rotates at a minimum speed of 50 RPM, more preferably at minimum speeds of 100 RPM, 125 RPM, 150 RPM, or 200 RPM, and most preferably within a range of 50 to 300 RPM, 100 to 300 RPM, or 150 to 300 RPM; iii. setting a first gap width between the feed roll and the center roll to be less than or equal to 100 µm, preferably less than or equal to 75 µm or less than or equal to 60 µm; iv. setting a second gap width between the center roll and the apron roll to be less than or equal to 100 µm, preferably less than or equal to 75 µm, less than or equal to 50 µm, less than or equal to 40 µm; less than or equal to 30 µm; and 4) processing the liquid silicone composition containing the carbon nanotube agglomerates by introducing it into the first gap between the feed roll and the center roll, where a first set of shear stress and shear rate conditions are applied, and then passed through the second gap between the center roll and the apron roll, where a second set of shear stress and shear rate conditions are applied, both shear stresses are defined to a sufficient level to initiate the breakdown and disentanglement of the carbon nanotube agglomerates, to complete a first cycle; 5) reprocessing the resulting mixture by repeating step 4) with the following additional conditions: • the shear stress which occurs within the first gap width between the feed roll and the center roll is increased, and • the shear stress which occurs within the second gap width between the center roll and the apron roll is increased; to complete a second cycle, and preferably the shear stresses are increased by diminishing the first gap width between the feed roll and the center roll and the second gap width between the center roll and the apron roll compared to the previous cycle; 6) optionally reprocessing at least once the resulting mixture of the preceding step with the following additional conditions: the shear stress is increased, and to complete another cycle; 7) optionally reprocessing at least once the resulting mixture of the preceding step by maintaining, increasing, or diminishing the shear stresses to complete final cycle(s); and 8) recovering the non-curable liquid silicone masterbatch. Claim 4. A process according to claim 3 wherein in step 4) processing the liquid silicone composition containing the carbon nanotube agglomerates by introducing it into the first gap between the feed roll and the center roll with a shear rate of at least 3000 (1 / s), preferably at least 4000 (1 / s), and even more preferably 5000 (1 / s), and then passed through the second gap between the center roll and the apron roll with a shear rate of at least 10000 (1 / s), preferably of at least 20000 (1 / s) and even more preferably 300002912909-120000 (1 / s) for a diameter of the rollers of at least 0.05 m and a speed of the apron roll of at least around 150 RPM, and preferably at least 200 RPM, to complete a first cycle. Claim 5. A process according to claim 3 wherein in step 5) processing the liquid silicone composition containing the carbon nanotube agglomerates by introducing it into the first gap between the feed roll and the center roll with a shear rate of at least 10000 (1 / s), preferably at least 12000 (1 / s), and even more preferably 14000 (1 / s), and then passed through the second gap between the center roll and the apron roll with a shear rate of at least 30000 (1 / s), for a diameter of the rollers of at least 0.05 m and a speed of the apron roll of at least around 150 RPM, and preferably at least 200 RPM, to complete a second cycle. Claim 6. A process according to claim 1 or 3 wherein in step 1) the liquid silicone composition containing carbon nanotubes agglomerates is a non-curable liquid silicone rubber masterbatch containing carbon nanotubes agglomerates masterbatch and comprising: (a) for 100 parts by weight of at least one polydiorganosiloxane A of general formula (I): [(R2)b(Alk)cSiO2 / 2]a [(Alk)(R2)2SiO1 / 2]2 (I) - wherein symbols R are independently of one another selected from the group consisting of (i) unsubstituted or fluorinated C1-C20hydrocarbon radical and (ii) phenyl radical; - wherein symbol Alk is a C2-C6 alkenyl group; and preferably said alkenyl groups are chosen from the group consisting of vinyl, allyl, and hexenyl; - where b=1 or 2, c= 0 or 1 and b+c=2; and - wherein the index a>1, preferably a is from 5 to 1500, most preferably a is from 5 to 1500, c=0 and b=2, and even more preferably a is from 100 to 1200, c=0 and b=2 or a is from 100 to 1000, c=0 and b=2; (b) from 1 parts by weight to 80 parts by weight of at least one silicone resin B containing vinyl groups, preferably from 5 parts by weight to 50 parts by weight and most preferably from 10 parts by weight to 40 parts by weight; (c) from 1 part by weight to 80 parts by weight of at least one filler C preferably from 5 part by weight to 50 parts by weight and most preferably from 10 part by weight to 40 parts by weight; (d) from 1 part by weight to 60 parts by weight of at least one organosilicon crosslinker XL containing at least 3 silicon-bonded hydrogen atoms per molecule when structured as a linear molecule, or at least two silicon-bonded hydrogen atoms when it takes the form of a branched polymer, preferably from 5 parts by weight to 40 parts by weight, and most preferably from 10 parts by weight to 30 parts by weight; (e) from 0.01 parts by weight to 20 parts by weight of at least one electrically conductive filler D chosen from the group of single-walled carbon nanotubes, multi-walled carbon nanotubes, crosslinked carbon nanotubes and their corresponding blends, preferably from2912909-120000 0.1 part by weight to 10 parts by weight and most preferably from 0.25 part by weight to 10 parts by weight; and (f) from 0 part by weight to 40 parts by weight of at least one polydiorganosiloxane XL3 containing at least 3 silicon-bonded C2-C6 alkenyl groups per polymer; (g) from 0 part by weight to 20 parts by weight of at least one diorganohydrogensiloxy- terminated polydiorganosiloxane CE1, and (h) from 0 part by weight to 20 parts by weight of at least one polydiorganosiloxane M containing a single silicon-bonded C2-C6 alkenyl group per polymer. Claim 7. A process according to claim 1 or 3 wherein in step 1) the liquid silicone composition containing carbon nanotubes agglomerates is a non-curable liquid silicone rubber masterbatch containing carbon nanotubes agglomerates masterbatch and comprising: (a) for 100 parts by weight of at least one polydiorganosiloxane A of general formula (I): [(R2)b(Alk)cSiO2 / 2]a [(Alk)(R2)2SiO1 / 2]2 (I)- wherein symbols R are independently of one another selected from the group consisting of (i) unsubstituted or fluorinated C1-C20 hydrocarbon radical and (ii)phenyl radical; - wherein symbol Alk is a C2-C4 alkenyl group; - where b=1 or 2, c= 0 or 1 and b+c=2; and - wherein the index a is from 1 to 1200, (b) from 1 part by weight to 80 parts by weight of at least one filler C preferably from 5 part by weight to 50 parts by weight and most preferably from 10 part by weight to 40 parts by weight; (c) from 0.01 parts by weight to 10 parts by weight of at least one organosilicon crosslinker XL containing at least 3 silicon-bonded hydrogen atoms per molecule when structured as a linear molecule, or at least two silicon-bonded hydrogen atoms when it takes the form of a branched polymer, preferably from 0.1 part by weight to 5 parts by weight, and most preferably from 0.2 part by weight to 2.5 parts by weight; (d) from 0.01 parts by weight to 20 parts by weight of at least one electrically conductive filler D chosen from the group of single-walled carbon nanotubes, multi-walled carbon nanotubes, crosslinked carbon nanotubes and their corresponding blends, preferably from 0.1 part by weight to 10 parts by weight and most preferably from 0.25 part by weight to 10 parts by weight; (e) from 0 part by weight to 15 parts by weight of at least one diorganohydrogensiloxy- terminated polydiorganosiloxane CE, and preferably from 0.1 part by weight to 15 parts by weight; (f) from 0 part by weight to 120 parts by weight of a monovinyl functional polydimethylsiloxane polymer; and2912909-120000 (g) from 0 part by weight to 10 parts by weight of at least one polydimethylsiloxane polymer. Claim 8. A non-curable liquid silicone rubber masterbatch obtained from the process of claim 6 useful for preparing a cured silicone rubber material having a durometer from over 40 Shore A to 90 Shore A and comprising: (a) for 100 parts by weight of at least one polydiorganosiloxane A of general formula (I): [(R2)b(Alk)cSiO2 / 2]a [(Alk)(R2)2SiO1 / 2]2 (I) - wherein symbols R are independently of one another selected from the group consisting of (i) unsubstituted or fluorinated C1-C20hydrocarbon radical and (ii) phenyl radical; - wherein symbol Alk is a C2-C6 alkenyl group; and preferably said alkenyl groups are chosen from the group consisting of vinyl, allyl, and hexenyl; - where b=1 or 2, c= 0 or 1 and b+c=2; and - wherein the index a>1, preferably a is from 5 to 1500, most preferably a is from 5 to 1500, c=0 and b=2, and even more preferably a is from 100 to 1200, c=0 and b=2 or a is from 100 to 1000, c=0 and b=2; (b) from 1 parts by weight to 80 parts by weight of at least one silicone resin B containing vinyl groups, preferably from 5 parts by weight to 50 parts by weight and most preferably from 10 parts by weight to 40 parts by weight; (c) from 1 part by weight to 80 parts by weight of at least one filler C preferably from 5 part by weight to 50 parts by weight and most preferably from 10 part by weight to 40 parts by weight; (d) from 1 part by weight to 60 parts by weight of at least one organosilicon crosslinker XL containing at least 3 silicon-bonded hydrogen atoms per molecule when structured as a linear molecule, or at least two silicon-bonded hydrogen atoms when it takes the form of a branched polymer, preferably from 5 parts by weight to 40 parts by weight, and most preferably from 10 parts by weight to 30 parts by weight; (e) from 0.01 parts by weight to 20 parts by weight of at least one electrically conductive filler D chosen from the group of single-walled carbon nanotubes, multi-walled carbon nanotubes, crosslinked carbon nanotubes and their corresponding blends, preferably from 0.1 part by weight to 10 parts by weight and most preferably from 0.25 part by weight to 10 parts by weight; and (f) from 0 part by weight to 40 parts by weight of at least one polydiorganosiloxane XL3 containing at least 3 silicon-bonded C2-C6alkenyl groups per polymer; (g) from 0 part by weight to 20 parts by weight of at least one diorganohydrogensiloxy- terminated polydiorganosiloxane CE1, and2912909-120000 (h) from 0 part by weight to 20 parts by weight of at least one polydiorganosiloxane M containing a single silicon-bonded C2-C6 alkenyl group per polymer. Claim 9. A non-curable liquid silicone rubber masterbatch obtained from the process of claim 7 useful for preparing a cured silicone rubber material having a durometer from 10 Shore A to up to 40 Shore A and comprising: (a) for 100 parts by weight of at least one polydiorganosiloxane A of general formula (I): [(R2)b(Alk)cSiO2 / 2]a [(Alk)(R2)2SiO1 / 2]2 (I) - wherein symbols R are independently of one another selected from the group consisting of (i) unsubstituted or fluorinated C1-C20 hydrocarbon radical and (ii)phenyl radical; - wherein symbol Alk is a C2-C4 alkenyl group; - where b=1 or 2, c= 0 or 1 and b+c=2; and - wherein the index a is from 1 to 1200, (b) from 1 part by weight to 80 parts by weight of at least one filler C preferably from 5 part by weight to 50 parts by weight and most preferably from 10 part by weight to 40 parts by weight; (c) from 0.01 parts by weight to 10 parts by weight of at least one organosilicon crosslinker XL containing at least 3 silicon-bonded hydrogen atoms per molecule when structured as a linear molecule, or at least two silicon-bonded hydrogen atoms when it takes the form of a branched polymer, preferably from 0.1 part by weight to 5 parts by weight, and most preferably from 0.2 part by weight to 2.5 parts by weight; (d) from 0.01 parts by weight to 20 parts by weight of at least one electrically conductive filler D chosen from the group of single-walled carbon nanotubes, multi-walled carbon nanotubes, crosslinked carbon nanotubes and their corresponding blends, preferably from 0.1 part by weight to 10 parts by weight and most preferably from 0.25 part by weight to 10 parts by weight; (e) from 0 part by weight to 15 parts by weight of at least one diorganohydrogensiloxy- terminated polydiorganosiloxane CE, and preferably from 0.1 part by weight to 15 parts by weight; (f) from 0 part by weight to 120 parts by weight of a monovinyl functional polydimethylsiloxane polymer; and (g) from 0 part by weight to 10 parts by weight of at least one polydimethylsiloxane polymer. Claim 10. A process for producing a curable liquid silicone composition containing carbon nanotubes, the process comprises : 1) preparing a non-curable liquid silicone masterbatch that contains carbon nanotubes according to claim 8 or 9;2912909-120000 2) adding to the prepared non-curable liquid silicone masterbatch: a) a hydrosilylation catalyst E in an amount to render the composition curable by hydrosilylation reactions, preferably the hydrosilylation catalyst is provided as a catalyst masterbatch comprising at least one hydrosilylation catalyst E and at least one vinyl siloxane polymer, and more preferably said hydrosilylation catalyst is provided as a catalyst masterbatch comprising at least one platinum-based catalyst E1 and at least one vinyl siloxane polymer; b) optionally an amount by weight of at least one cure rate controller F to slow the curing reaction, and c) optionally an amount by weight of at least one additive G. Claim 11. A process for producing a curable liquid silicone composition containing carbon nanotubes useful for preparing silicone rubber material having a durometer from 15 Shore A to 80 Shore A, the process comprises : 1) providing two non-curable liquid silicone masterbatches containing carbon nanotubes which are: a) a non-curable liquid silicone rubber masterbatch useful for preparing a cured silicone rubber material having a durometer from over 40 Shore A to 90 Shore A and according to claim 8, and b) a non-curable liquid silicone rubber masterbatch useful for preparing a cured silicone rubber material having a durometer having a durometer from 10 Shore A to up to 40 Shore A and according to claim 9; 2) mixing said non-curable liquid silicone rubber masterbatches in a mixing ratio by weight (or volume) from 1:100 to 100:1; and 3) adding to the prepared non-curable liquid silicone masterbatch: a) a hydrosilylation catalyst E in an amount to render the composition curable by hydrosilylation reactions, preferably the hydrosilylation catalyst is provided as a catalyst masterbatch comprising at least one hydrosilylation catalyst E and at least one vinyl siloxane polymer, and more preferably said hydrosilylation catalyst is provided as a catalyst masterbatch comprising at least one platinum-based catalyst E1 and at least one vinyl siloxane polymer; b) optionally an amount by weight of at least one cure rate controller F to slow the curing reaction, and c) optionally an amount by weight of at least one additive G. Claim 12. A process for producing a molded silicone rubber product M1 containing carbon nanotubes via injection molding comprising the following steps:2912909-120000 a) feeding into a base feed line the non-curable liquid silicone masterbatch that contains carbon nanotubes according to claim 8 or 9; b) feeding into a separate catalyst feed line a hydrosilylation catalyst E in an amount to render the composition curable by hydrosilylation reactions, preferably the hydrosilylation catalyst is provided as a catalyst masterbatch comprising at least one hydrosilylation catalyst E and at least one vinyl siloxane polymer, and more preferably said hydrosilylation catalyst is provided as a catalyst masterbatch comprising at least one platinum-based catalyst E1 and at least one vinyl siloxane polymer; c) optionally feeding into a separate feed line a cure rate controller F to slow the curing reaction, d) optionally feeding into a separate additive feed line at least one additive G, e) directing said non-curable liquid silicone masterbatch, said hydrosilylation catalyst E, optionally said cure rate controller F and optionally said additive G either into a mixing tank prior directing the resulting mixture into a barrel of an injection machine or directly into said barrel to obtain a curable liquid silicone rubber composition containing carbon nanotubes; and f) allowing the resulting mixture to cure, preferably by heating at a temperature ranging from 80°C to up to 220°C, so as to obtain a molded silicone rubber product M1 containing carbon nanotubes. Claim 13. A curable liquid silicone composition containing carbon nanotubes prepared according to claim 10. Claim 14. A curable liquid silicone rubber composition containing carbon nanotubes prepared according to claim 6 useful for preparing a cured silicone rubber material having a durometer from over 40 Shore A to 90 Shore A and comprising: (a) for 100 parts by weight of at least one polydiorganosiloxane A of general formula (I): [(R2)b(Alk)cSiO2 / 2]a[(Alk)(R2)2SiO1 / 2]2(I) - wherein symbols R are independently of one another selected from the group consisting of (i) unsubstituted or fluorinated C1-C20 hydrocarbon radical and (ii) phenyl radical; - wherein symbol Alk is a C2-C6alkenyl group; and preferably said alkenyl groups are chosen from the group consisting of vinyl, allyl, and hexenyl; - where b=1 or 2, c= 0 or 1 and b+c=2; and - wherein the index a>1, preferably a is from 5 to 1500, most preferably a is from 5 to 1500, c=0 and b=2, and even more preferably a is from 100 to 1200, c=0 and b=2 or a is from 100 to 1000, c=0 and b=2; (b) from 1 parts by weight to 80 parts by weight of at least one silicone resin B containing vinyl groups, preferably from 5 parts by weight to 50 parts by weight and most preferably from 10 parts by weight to 40 parts by weight;2912909-120000 (c) from 1 part by weight to 80 parts by weight of at least one filler C preferably from 5 part by weight to 50 parts by weight and most preferably from 10 part by weight to 40 parts by weight; (d) from 1 part by weight to 60 parts by weight of at least one organosilicon crosslinker XL containing at least 3 silicon-bonded hydrogen atoms per molecule when structured as a linear molecule, or at least two silicon-bonded hydrogen atoms when it takes the form of a branched polymer, preferably from 5 parts by weight to 40 parts by weight, and most preferably from 10 parts by weight to 30 parts by weight; (e) from 0.01 parts by weight to 20 parts by weight of at least one electrically conductive filler D chosen from the group of single-walled carbon nanotubes, multi-walled carbon nanotubes, crosslinked carbon nanotubes and their corresponding blends, preferably from 0.1 part by weight to 10 parts by weight and most preferably from 0.25 part by weight to 10 parts by weight; and (f) from 0 part by weight to 40 parts by weight of at least one polydiorganosiloxane XL3 containing at least 3 silicon-bonded C2-C6 alkenyl groups per polymer; (g) from 0 part by weight to 20 parts by weight of at least one diorganohydrogensiloxy- terminated polydiorganosiloxane CE1, and (h) from 0 part by weight to 20 parts by weight of at least one polydiorganosiloxane M containing a single silicon-bonded C2-C6 alkenyl group per polymer. (i) a hydrosilylation catalyst E in an amount to render the composition curable by hydrosilylation reactions, preferably the hydrosilylation catalyst is provided as a catalyst masterbatch comprising at least one hydrosilylation catalyst E and at least one vinyl siloxane polymer, and more preferably said hydrosilylation catalyst is provided as a catalyst masterbatch comprising at least one platinum-based catalyst E1 and at least one vinyl siloxane polymer; (j) optionally an amount by weight of at least one cure rate controller F to slow the curing reaction, preferably from 0.01 part by weight to 10 parts by weights and (k) optionally an amount by weight of at least one additive G, preferably from 0.1 part by weight to 10 parts by weight; and said curable liquid silicone rubber composition having the following properties: • a Shore A hardness when cured from over 40 Shore A to 90 Shore A, • an uncured rheology profile characterized by a viscosity of over 1,000,000 mPa.s at a shear rate of 1 s-1and a viscosity of over 100,000 mPa.s at a shear rate of 10 s-1, preferably a viscosity of from 1,000,000 mPa.s to 5,000,000 mPa.s at a shear rate of 1 s-1and a viscosity of from 300,000 mPa.s to 800,000 mPa.s at a shear rate of 10 s1, and • when cured a volume resistivity of less than 10 ohm-cm. Claim 15. A curable liquid silicone rubber composition containing carbon nanotubes prepared according to claim 14 having the following properties:2912909-120000 • A Shore A hardness, when cured, ranging from over 40 Shore A up to 90 Shore A. • A Shear Thinning Index of equal to or more than 7.5, preferably equal to or more than 8.5, and even more preferably ranging from 8.5 up to 14; • An uncured viscosity at shear rate of 10 / s ranging from 400000 mPa.s to 1000000 mPa.s, preferably ranging from 500000 to 750000 mPa.s, and • When cured, a volume resistivity of less than 10 ohm-cm. Claim 16. A curable liquid silicone rubber composition containing carbon nanotubes prepared according to claim 7 useful for preparing a cured silicone rubber material having a durometer from 10 Shore A to up to 40 Shore A and comprising: (a) for 100 parts by weight of at least one polydiorganosiloxane A of general formula (I): [(R2)b(Alk)cSiO2 / 2]a[(Alk)(R2)2SiO1 / 2]2(I) - wherein symbols R are independently of one another selected from the group consisting of (i) unsubstituted or fluorinated C1-C20 hydrocarbon radical and (ii) phenyl radical; - wherein symbol Alk is a C2-C4alkenyl group; - where b=1 or 2, c= 0 or 1 and b+c=2; and - wherein the index a is from 1 to 1200, (b) from 1 part by weight to 80 parts by weight of at least one filler C preferably from 5 part by weight to 50 parts by weight and most preferably from 10 part by weight to 40 parts by weight; (c) from 0.01 parts by weight to 10 parts by weight of at least one organosilicon crosslinker XL containing at least 3 silicon-bonded hydrogen atoms per molecule when structured as a linear molecule, or at least two silicon-bonded hydrogen atoms when it takes the form of a branched polymer, preferably from 0.1 part by weight to 5 parts by weight, and most preferably from 0.2 part by weight to 2.5 parts by weight; (d) from 0.01 parts by weight to 20 parts by weight of at least one electrically conductive filler D chosen from the group of single-walled carbon nanotubes, multi-walled carbon nanotubes, crosslinked carbon nanotubes and their corresponding blends, preferably from 0.1 part by weight to 10 parts by weight and most preferably from 0.25 part by weight to 10 parts by weight; (e) from 0 part by weight to 15 parts by weight of at least one diorganohydrogensiloxy- terminated polydiorganosiloxane CE, and preferably from 0.1 part by weight to 15 parts by weight; (f) from 0 part by weight to 120 parts by weight of a monovinyl functional polydimethylsiloxane polymer; and (g) from 0 part by weight to 10 parts by weight of at least one polydimethylsiloxane polymer.2912909-120000 (h) a hydrosilylation catalyst E in an amount to render the composition curable by hydrosilylation reactions, preferably the hydrosilylation catalyst is provided as a catalyst masterbatch comprising at least one hydrosilylation catalyst E and at least one vinyl siloxane polymer, and more preferably said hydrosilylation catalyst is provided as a catalyst masterbatch comprising at least one platinum-based catalyst E1 and at least one vinyl siloxane polymer; (i) optionally an amount by weight of at least one cure rate controller F to slow the curing reaction, preferably from 0.01 part by weight to 10 parts by weights and (j) optionally an amount by weight of at least one additive G, preferably from 0.1 part by weight to 10 parts by weight; and said curable liquid silicone rubber composition having the following properties: • When cured, it has a Shore A hardness ranging from 10 Shore A up to 40 Shore A; • an uncured rheology profile characterized by a viscosity of over 1,000,000 mPa.s at a shear rate of 1 s-1and a viscosity of over 100,000 mPa.s at a shear rate of 10 s-1, preferably a viscosity of from 1,000,000 mPa.s to 5,000,000 mPa.s at a shear rate of 1 s-1and a viscosity of from 300,000 mPa.s to 800,000 mPa.s at a shear rate of 10 s1, and • when cured a volume resistivity of less than 10 ohm-cm. Claim 17. A two-part curable liquid silicone rubber composition useful for preparing a cured silicone rubber material having a durometer from over 40 Shore A to 90 Shore A and comprising: • a first part comprising components (a) to (e) and optionally components (f), (g), (h), and (k) but not component (i) according to claim 14; and • a second part comprising components (a), (c) and (i) and optionally component (j) but not components (d), (f) and (g) according to claim 14. Claim 18. A two-part curable liquid silicone rubber composition useful for preparing a cured silicone rubber material having a durometer from 10 Shore A to up to 40 Shore A and comprising: • a first part comprising components (a) to (e) and optionally components (f), (g), (i) and (j) but not component (h) according to claim 22; and • a second part comprising components (a), (b) and (h) and optionally component (i) but not components (c) and (e) according to claim 22. Claim 19. A multi-part curable liquid silicone rubber composition useful for preparing a cured silicone rubber material having a durometer from over 40 Shore A to 90 Shore A and comprising : • a first part comprising components (a), (b), (c), (d), (e), and optionally (f), (g) and (h) according to claim 14; • a second part comprising component (i) according to claim 14; • a third part comprising component (j) according to claim 14, and2912909-120000 • optionally a fourth part comprising component (k) according to claim 14. Claim 20. A multi-part curable liquid silicone rubber composition useful for preparing a cured silicone rubber material having a durometer from 10 Shore A to up to 40 Shore A and comprising : • a first part comprising components (a), (b), (c) and (d) and optionally, (e), (f), and (g) according to claim 16; • a second part comprising component (h) according to claim 16; • a third part comprising component (i) according to claim 16, and • optionally a fourth part comprising component (j) according to claim 16. Claim 21. A curable liquid silicone rubber composition containing carbon nanotubes prepared according to claim 16 having the following properties: • A Shore A hardness when cured from 10 Shore A up to 40 Shore A, • A Shear Thinning Index of equal to or more than 6.3, preferably equal to or more than 7.5, and even more preferably ranging from 7.5 up to 12, • An uncured viscosity at shear rate of 10 / s ranging from 300000 mPa.s to 900000 mPa.s, preferably ranging from 450000 mPa.s to 700000 mPa.s, and • when cured a volume resistivity of less than 10 ohm-cm. Claim 22. A method for additive manufacturing an article comprising an electrically conductive silicone material comprising the steps of: 1) printing a first silicone composition prepared by combining the components of the curable liquid silicone composition according to anyone of claims 13 to 21 on a substrate with a 3D printer, preferably selected from an extrusion 3D printer to form a first layer, 2) printing a second silicone composition prepared by combining the components of the curable liquid silicone composition according to anyone of claims 13 to 21 on the first or previous layer with the said 3D printer to form a subsequent layer and 3) optionally repeating step 2) with independently selected said curable liquid silicone composition for any additional layer needed, and 4) allowing the first and subsequent layers to crosslink, optionally by heating, to obtain an article comprising an electrically conductive silicone material. Claim 23. An electrically conductive silicone rubber material obtained by curing a curable liquid silicone rubber composition according to claim 14 and having the following properties: • a durometer from over 40 Shore A to 90 Shore A; and • a volume resistivity of less than 10 ohm-cm.2912909-120000 Claim 24. An electrically conductive silicone rubber material obtained by curing a curable liquid silicone rubber composition according to claim 16 and having the following properties: • a durometer hardness ranging from 10 Shore A to 40 Shore A; and • a volume resistivity of less than 10 ohm-cm. Claim 25. An article which comprises a portion of material prepared from an electrically conductive silicone rubber material according to the invention according to claim 23 or 24. Claim 26. An article according to claim 25 which is a sensor, a biosensor, a dental device, silicone dots used as an interface between a machine and skin to allow diagnostic readings, a point-of-care device, flexible electronics, a medical implant, a seal, a gasket, a connector, a device for bio-manufacturing or bio- pharma processes, a long-term implantable device for neuroscience, a device for targeted drug delivery systems, a biosensor, a strain sensor or piezo-resistive device for diagnostics, an antenna for radio technology, or a cable, radiation shield, light-absorption device, heat spreader, or an EMI shielding material.

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