22 results about "Silicone matrix" patented technology

Compression pad comprising densified granules and silicone resin binder A compression pad for use in a battery assembly comprising a composite comprising: • 35 to 95 wt% silicone resin, which forms at least part of a silicone resin matrix; • 0 to 40 wt% optional additives • 5 to 65 wt% granules comprising fumed silica and an IR opacifier, said granules dispersed within the silicone resin matrix; one or both of said silicone resin matrix and said granules further comprise the optional additives. The granules comprise pores filled with the silicone resin to form impregnated granules. The granules are made by blending fumed silica, IR opacifiers and the optional additives and densifying the mixture by mechanical densification. The granules are then mixed with the silicone resin. Methods of forming te composite for use in the compression pad are also disclosed. In a preferred embodiment, commercially available granules comprising fumed silica and silicon carbide (SiC) as an IR opacifier may be used.

The invention relates to the technical field of liquid silica gel forming, and discloses a liquid color silica gel forming process and clothing application, and the liquid color silica gel forming process comprises the following steps: step 1, base material pretreatment: selecting a flexible base material, cutting according to the size of a formed part, removing corner burrs, and sequentially carrying out ultrasonic cleaning, hot air drying and plasma activation; 2, according to the forming color requirement corresponding to the qualified flexible substrate obtained in the step 1, color paste preparation and dispersion are carried out, a bi-component addition type liquid silica gel matrix and special color paste are taken according to the mass ratio of 100: 8, 0.8% of surface modified nano-silica dispersion media are added, a dynamic shearing-ultrasonic two-stage dispersion technology is adopted for treatment, and the flexible substrate is obtained. According to the liquid color silica gel forming process, a two-stage dispersion process is adopted, a special dispersion medium is matched, uniform dispersion of color paste is achieved, and the liquid color silica gel forming process has the core advantages of being stable in color, washable and free of fading, good in silica gel fluidity after dispersion and suitable for scenes with high color requirements such as garment decoration.

The present invention relates to a composite for use in a battery assembly comprising: • 35 to 95 wt% silicone resin, which forms at least part of a silicone resin matrix; • 0 to 40 wt% optional additives • 5 to 65 wt% granules comprising fumed silica and an IR opacifier, said granules dispersed within the silicone resin matrix; one or both of said silicone resin matrix and said granules further comprise the optional additives. The granules comprise pores filled with the silicone resin to form impregnated granules.

The application relates to the field of color paste, in particular to a silicone leather color paste and a preparation method thereof. The silicone leather color paste comprises the following raw materials in mass parts: 55-75 parts of film-forming resin, 10-30 parts of colorant, 9-15 parts of combined reinforcing agent, 3-6 parts of dispersing agent, 3-10 parts of filler, 2-4 parts of wetting agent, 3-10 parts of water, 2-10 parts of thickening agent, 0.3-0.5 parts of defoaming agent, 0.2-0.4 parts of ultraviolet absorber and 5-10 parts of polymeric emulsion. The finally prepared color paste material has excellent pigment dispersibility and compatibility with a silicone matrix, can avoid the use of organic solvents, avoid greater environmental problems, can finally maintain good stability and storage performance and the like, the comprehensive performance is greatly improved, and the higher application performance requirement of the silicone leather for the color paste can be effectively met.

This invention relates to a transparent polishing pad for photoelectrochemical mechanical polishing (PECMP), its preparation method, and its application method. The polishing pad is made of a highly transparent silicone matrix with ultraviolet light transmittance, and nano-silica abrasive particles are uniformly dispersed within the pad, giving it both excellent light transmission and stable mechanical polishing capabilities. This enables effective synergy of optical, electrical, chemical, and mechanical multi-energy fields in semiconductor PECMP processes. The transparent pad has excellent ultraviolet light transmittance, allowing ultraviolet light to penetrate the polishing pad during processing, achieving in-situ photochemical irradiation and chemical etching of the workpiece surface processing area, effectively improving the chemical reaction rate of the workpiece. Furthermore, the nano-silica abrasive particles dispersed in the transparent polishing pad maintain optical path continuity while providing stable mechanical cutting micro-actions. The transparent polishing pad with abrasive properties can achieve a dynamic balance of chemical and mechanical properties across the entire processing surface, effectively improving polishing efficiency and uniformity.

The invention discloses a room-temperature-cured high-temperature-resistant elastic silicon resin matrix as well as a preparation method and application thereof. The preparation method of the elastic silicon resin matrix comprises the following steps: (1) preparing preparation raw materials, wherein the preparation raw materials comprise hydroxyl-terminated polysiloxane, polyfunctional alkoxy silane, polyhedral oligomeric silsesquioxane, a basic catalyst and a solvent; and (2) mixing the preparation raw materials, and performing condensation polymerization to obtain the elastic silicon resin matrix. Compared with liquid silicon resin in the market, the elastic silicon resin prepared by the invention does not need to be stored by using a large amount of solvent, is low in viscosity, can be cured at room temperature, is mild in reaction condition, easy to control and high in batch stability, can effectively avoid the gelation problem in the alkoxy hydrolytic condensation process, and has the advantages of improving the product yield and reducing the production cost. And the stability of the product is improved.

The invention discloses medical liquid silica gel and a preparation method thereof, and relates to the technical field of silica gel materials. The method comprises the following steps: drying vinyl-terminated polydimethylsiloxane with a side chain containing vinyl, and carrying out addition reaction on part of polydimethylsiloxane and dehydrated 1H, 1H, 2H, 2H-perfluorodecyl dimethyl silane to obtain a fluorine-containing modified liquid silica gel matrix; the preparation method comprises the following steps: coating dopamine-coated nano-diamond with a silicon dioxide layer, and then grafting vinyl trimethoxy silane and octyl triethoxy silane, so as to prepare a modified wear-resistant filler; the preparation method comprises the following steps: mixing a fluorine-containing modified liquid silica gel matrix, a modified wear-resistant filler, vinyl MQ silicon resin and a catalyst to prepare a component A; mixing the residual dry base rubber with hydrogen-containing silicone oil and 3-methyl-1-butyne-3-alcohol to prepare a component B; and finally, mixing and curing the component A and the component B. The prepared liquid silica gel has excellent wear resistance and mechanical properties, and is suitable for the field of medical apparatuses and instruments.

A compression pad for use in a battery assembly comprising a composite comprising: • 35 to 95 wt% silicone resin, which forms at least part of a silicone resin matrix; • 0 to 40 wt% optional additive

The invention relates to the technical field of organic silicon emulsion preparation, and discloses stable organic silicon emulsion as well as a preparation method and application thereof. According to the method, hydroxyl-terminated polymethylsilicone oil is used as an organic silicon matrix, hydroxypropyl-beta-cyclodextrin is used as a biomass hydrophilic modifier, self-made glyceryl ether modified methylsilane is matched, a prepolymer is prepared through compound modification, then the prepolymer and a compound emulsifier aqueous solution are mixed and emulsified, and finally a finished product is obtained through crosslinking curing of an initiator. The problems that an existing organic silicon emulsion is prone to layering and demulsification, poor in compatibility and single in function are solved through a double stabilization mechanism of physical anchoring and chemical crosslinking, and the product keeps a uniform state in a complex environment and has the multiple functions of softness, lubrication, film forming and the like. The preparation process is simple and mild, raw materials are easy to obtain, complex purification is not needed, and the method is suitable for large-scale production and can be widely applied to the fields of textiles, cosmetics, personal care, medicine and industry.

The application discloses a preparation method and application of a silicone gel modified tungsten disulfide insulating composite material for high-voltage and high-power power electronic device packaging, and proposes that tungsten disulfide is modified by Tris and a silane coupling agent to prepare an organic silicone gel composite insulating material; the method effectively improves the interface compatibility of inorganic fillers and an organic silicone matrix, solves the problem of easy agglomeration of tungsten disulfide nanomaterials, realizes uniform dispersion of the tungsten disulfide nanomaterials in the gel, and has the advantages of simple process, mild conditions and facilitation of large-scale production since the preparation process only needs normal-temperature ultrasonic, magnetic stirring, centrifugal washing and vacuum drying; the introduction of tungsten disulfide regulates the trap energy level distribution and improves the electric field distribution and heat dissipation by using the heat conduction characteristics of the tungsten disulfide; and the results show that the breakdown field strength is increased by 20.4%, the thermal weight loss T5% reaches 377 DEG C, the initial voltage of partial discharge is increased by 48.5%, and the comprehensive performance meets the requirements of new-generation high-voltage and high-power power electronic device packaging.

The invention provides organic silicon heat-conducting gel and a preparation method thereof, and belongs to the technical field of thermal interface materials. The organic silicon heat-conducting gel comprises an organic silicon matrix, a heat-conducting filler system, a catalyst and an inhibitor, the organic silicon matrix comprises vinyl-terminated polydimethylsiloxane, polydimethylsiloxane with a hydrogen-containing side chain and branched chain type vinyl silicone oil; the heat-conducting filler system comprises surface-modified spherical aluminum powder and surface-hydroxylated tetrapod-like zinc oxide; the surface-modified spherical aluminum powder comprises a spherical aluminum core and a silicon dioxide layer coating the surface of the aluminum core, and the surface of the silicon dioxide layer is grafted with a vinyl-containing silane coupling agent; the surface-hydroxylated tetrapod-like zinc oxide is obtained by introducing hydroxyl groups to the surface of the surface-hydroxylated tetrapod-like zinc oxide through aqueous alkali treatment. The synergistic effect formed by the surface-modified spherical aluminum powder and the surface-hydroxylated tetrapod-like zinc oxide can ensure that the gel material has good flexibility and low modulus, and meanwhile, the excellent heat-conducting property is realized.

The application discloses a high-thermal-conductivity gasket with resilience, which is a single-layer integrated structure, and a main body of the gasket is composed of a continuous-phase matrix of an addition-type silicone gel, the gel is formed through a hydrosilation reaction of a special-structure vinyl silicone oil and a polysiloxane cross-linking agent containing Si-H groups; and carbon fibers that are surface-modified are uniformly dispersed in the gel matrix. The application introduces carbon fibers that are subjected to surface oxidation treatment as a thermal-conductivity functional phase, controls the length, diameter and length-diameter ratio of the carbon fibers, and combines a bimodal distribution and a micro-beam compound design to realize three-dimensional uniform dispersion under low-shear mixing and vacuum defoaming processes, so that a continuous thermal-conductivity channel is formed through the matrix; the interface compatibility of the carbon fiber surface polarity after modification with the silicone matrix is improved, the interface is firmly combined, the scattering and thermal resistance of phonons at the interface are effectively reduced, and high-efficiency thermal conduction is realized; micro-mechanical support is provided in the thickness direction, the flow and collapse of the matrix under long-term compression are inhibited, and the resilience retention rate is improved.

The invention provides a nano-coated one-dimensional oriented synergistically-enhanced high-thermal-conductivity silica gel material and a preparation process thereof, and relates to the field of thermal-conductivity silica gel. The nano-coated one-dimensional oriented synergistically enhanced high-thermal-conductivity silica gel material comprises a silica gel matrix and nano-coated micron particles uniformly dispersed in the silica gel matrix, and the nano-coated micron particles are formed by uniformly coating high-thermal-conductivity nano-particles on the surfaces of micron-sized thermal conductive particles. According to the nano-coated one-dimensional oriented synergistically-enhanced high-thermal-conductivity silica gel material and the preparation process thereof, a multi-stage process of constructing three-dimensional nodes by nano-coating, forming regular channels by one-dimensional orientation and constructing a collaborative network is adopted; the preparation method comprises the following steps: firstly, uniformly coating high-thermal-conductivity nanoparticles (such as graphene nanosheets, carbon nanotubes and boron nitride nanosheets) on the surfaces of micron-sized thermal conductive particles (such as aluminum oxide, aluminum nitride and boron nitride micron powder with the particle size of 1-100 microns) by adopting a liquid-phase reduction-in-situ growth or chemical vapor deposition technology;

A ceramifiable composition comprises a crosslinked silicone matrix retaining stabilizing components. The stabilizing components comprise subcomponents: a) at least one of an aluminosilicate clay, aluminum oxide, or a hydrate thereof; b) at least one of phosphorus pentoxide, a polyphosphate, an inorganic phosphate salt, boron oxide, boric acid or a salt thereof; and c) at least one of an alkaline earth oxide, alkaline earth carbonate, or a hydrate thereof, and wherein heating the ceramifiable composition to a temperature between 600 and 1600 degrees Celsius, inclusive, results in a ceramified composition. An article including a layer of the ceramifiable composition and a method of making the same are also disclosed.

The invention discloses a preparation method of composite molding conductive silica gel, and belongs to the technical field of functional polymer composites.The preparation method of the composite molding conductive silica gel comprises a silica gel matrix; the functional network is integrated in the silica gel substrate, the functional network comprises a sensing unit, the sensing unit is configured to generate a detectable resistance signal in response to mechanical deformation, and the resistance signal presents a negative pressure resistance effect in an initial stretching stage. According to the invention, stable and adjustable'negative pressure resistance-positive pressure resistance 'asymmetric response is realized in conductive silica gel, the limitation that a traditional sensor can only provide monotonic signals is changed, a solid hardware foundation is provided for capturing high-dimensional information sensing of strain size, rate and mode, and through an exquisite microstructure design, the sensor can be used for sensing high-dimensional information of strain size, rate and mode. The material not only realizes high sensitivity and high signal-to-noise ratio, but also has unique strain rate sensitivity, so that the material can accurately capture dynamic information which cannot be identified by a traditional sensor.

A substrate (12) for delivering a biologically active substance, the substrate (12) comprising: a cross-linked silicone matrix formed by cross-linking a silicone polymer using at least one crosslinking agent comprising a tetraalkoxysilane, the cross-linked silicone matrix defining a plurality of domains, and a composition contained within the domains of the cross-linked silicone matrix, wherein the composition comprises: at least one monomeric glycol and at least one biologically active substance.

The invention belongs to the technical field of aerospace materials, and particularly relates to an anti-atomic oxygen composite film and a preparation method and application thereof, and the anti-atomic oxygen composite film comprises an A / B / C structure, an A / C / B structure or an A / D structure. Wherein A is a polymer substrate, B is an organic silicon protective layer, C is a metal catalytic layer, and D is a composite functional layer formed by dispersing nano metal particles in an organic silicon matrix. The prepared atomic oxygen resistant composite film can timely reform and convert high-energy AO into O2 and release energy to reduce the strong oxidation effect of the high-energy AO on the coating, so that the chain degradation reaction of an organosilicon polymer is slowed down or even terminated, meanwhile, the diffusion rate of the AO is limited in cooperation with the flexible organosilicon coating, and oxidation denudation of the AO on a polymer substrate is expected to be inhibited. Through triple optimization of the structure, the material and the interface, the excellent and lasting atomic oxygen resistance is obtained, and the coating is suitable for spacecraft surface protection.

The invention relates to the technical field of heat conduction materials, in particular to high-flow wide-temperature-range adaptive thermal grease suitable for a contact surface of a heating body and heat dissipation equipment and a preparation method of the high-flow wide-temperature-range adaptive thermal grease. The composition is prepared from the following raw materials in percentage by weight: 25-45% of organic silicone matrix; 50-65% of heat conduction powder; 3-10% of an activity promoter; the balance is an auxiliary agent; the active promoter is composed of diether fluorene, a flexible organic silicon matrix and an interface coupling agent in a weight ratio of 1: (1-3): (2-3); and the interface coupling agent is amino copolymerized oligomer siloxane and / or glycidyl ether oxypropyl organic silicon oligomer. The activity promoter is composed of diether fluorene, a flexible organic silicon matrix and an interface coupling agent, so that a better synergistic effect is achieved, and the high fluidity and wide temperature range adaptability of the thermal grease are further improved.

The present application relates to the technical field of heat conduction, in particular to a multi-stage diamond filler composite heat-conducting silicone grease and a preparation method thereof. The present application provides a multi-stage diamond filler composite heat-conducting silicone grease, which comprises a silicone matrix and fillers distributed in the silicone matrix, wherein the fillers comprise diamond microspheres, nano heat-conducting bridges and heat-conducting whiskers; the nano heat-conducting bridges form heat-conducting bridges between the diamond microspheres, and the heat-conducting whiskers are filled in the gaps between the diamond microspheres and the nano heat-conducting bridges. The present application provides a multi-stage diamond filler composite heat-conducting silicone grease and a preparation method thereof, and can provide a composite heat-conducting silicone grease with excellent heat conduction performance.

The invention discloses a mildew-proof and flame-retardant silicone sealant for buildings and a preparation method of the mildew-proof and flame-retardant silicone sealant, and belongs to the technical field of high polymer materials. The sealant comprises dihydroxy polydimethylsiloxane, a composite mildew-proof agent, a composite flame retardant, a reinforcing filler and a cross-linking system, wherein the composite mildew preventive is silver-loaded nano silicon dioxide which is subjected to surface modification by a silane coupling agent and is loaded with BIT, and an organic / inorganic synergistic and slow-release mildew-proof network is constructed; the composite flame retardant is composed of surface modified aluminum hydroxide, silicon resin powder and a plant char-forming compound, the heat absorption, char-forming and ceramization multi-synergistic flame-retardant effect is achieved, all functional components are subjected to silanization treatment, and the compatibility with a silicone matrix is excellent. The silicone sealant prepared by the invention has 0-level long-acting mildew resistance, V-0-level efficient flame retardance, excellent mechanical property and storage stability, solves the problems that a mildew inhibitor is easy to migrate and a flame retardant is high in filling and poor in compatibility with a matrix, and is particularly suitable for building sealing scenes with double high requirements on sanitation and safety.

This invention discloses a core-shell structured flame retardant and its application method in thermally conductive materials. The method includes dispersing antimony phosphate oxyphosphate and boron nitride nanosheets in a liquid medium and subjecting them to a hydrothermal reaction to form a thermally conductive-flame-retardant composite core encapsulated by boron nitride nanosheets. After washing and drying, a core-shell structured thermally conductive flame retardant precursor is obtained. The precursor is dispersed in a solvent and sequentially coated with a borosilicate-modified phenolic resin inner shell through an in-situ polycondensation reaction, followed by a graphene nanosheet outer shell coating through a reduction deposition reaction. After separation and drying, a multifunctional core-shell structured thermally conductive flame retardant is obtained. After surface activation treatment, it is composited with a silicone matrix and thermally conductive auxiliary components, and directly molded into a high thermal conductivity and flame retardant heat dissipation interface material through a curing process. Through the multi-layer design and systematic application method of the core-shell structured flame retardant, a highly efficient synergy between the heat dissipation performance and fire safety of the thermally conductive material is achieved.

The invention discloses high-temperature-resistant fluorescent heat-conducting powder as well as a preparation method and application thereof. The powder is prepared by performing surface modification on conventional heat-conducting powder by using a silane coupling agent with fluorescence characteristics; the fluorescent silane coupling agent is synthesized from a perylene fluorescent compound and a double-end siloxane type long-chain silane coupling agent through a hydrosilylation reaction. The preparation method comprises the following steps: firstly, respectively synthesizing a perylene fluorescent compound and a double-end siloxane long-chain silane coupling agent, and then carrying out addition reaction to obtain a target fluorescent coupling agent; and then stirring and mixing the fluorescent coupling agent and the heat-conducting powder at a high speed to prepare the composite powder with heat-conducting and fluorescent functions. The powder is uniformly dispersed in an organic silicon matrix, has good compatibility, and can effectively inhibit fluorescence quenching and heat conduction network damage, and the prepared organic silicon composite material can synchronously realize heat conduction and state tracing functions without adding a fluorescent agent. The method has an important application prospect in the high-end fields of electronic packaging, thermal interface materials and the like which require integration of thermal management and visual monitoring.