367 results about "Silicone polymer" patented technology

The invention relates to the technical field of polypropylene plastics, in particular to a high-strength antibacterial polypropylene plastic and a preparation method thereof. The antibacterial polypropylene material comprises the following components in parts by weight: 60-80 parts of polypropylene resin, 5-15 parts of nano titanium dioxide and nano zinc oxide composite particles modified by a special organosilicon polymer, 3-8 parts of an antibacterial agent compounded by quaternary ammonium salt and bioactive peptide, 5-10 parts of a core-shell structure MBS toughening agent and 0.5-2 parts of a hindered phenol-thioether composite antioxidant. 1-3 parts of a calcium stearate processing aid; and 3-8 parts of dopamine modified chopped carbon fibers. The composite material is high in strength, tensile strength, bending strength and impact strength are remarkably improved, and larger external force can be borne; the antibacterial performance is excellent, and the antibacterial rate reaches 95%-99%; the preparation process is environment-friendly and efficient, and the product is good in stability and recoverable; product safety can be guaranteed, the service life is prolonged, and economic and social benefits are good.

The invention relates to a preparation method of spherical silicon dioxide micropowder with ultralow dielectric loss. The preparation method comprises the following steps: preparing an organic silicon polymer; preparing slurry; performing solid-liquid separation on the synthetic slurry to obtain concentrated slurry, and drying the concentrated slurry to obtain spherical silica powder; carrying out low-temperature heat treatment on the obtained spherical silica powder at 1500-7000 DEG C for h to remove residual organic matters and free water in the powder; then, high-temperature densification is carried out at the temperature of 3000-28000 DEG C for h, and moisture is further removed; adding a modifier into the stirring equipment for surface modification; and after surface modification, drying at 55-300 DEG C for h, and removing modified micromolecular byproducts to obtain the spherical silicon dioxide micro powder with ultralow dielectric loss. The method is simple in production process, short in production period, low in production cost, high in yield and capable of effectively reducing the dielectric loss of the spherical silicon dioxide micro powder.

The invention relates to the technical field of ceramic material connection, and particularly provides a silicon carbide ceramic connecting agent, a connecting method thereof and a silicon carbide ceramic connecting joint. The silicon carbide ceramic coupling agent comprises the following components in percentage by mass: 30%-80% of an organic silicon polymer precursor, 10%-60% of an inert filler and 1%-50% of an active filler. The organic silicon polymer precursor comprises vinyl hydrogen-based polycarbosilane, a cross-linking agent and an initiator, and in the organic silicon polymer precursor, the addition amount of the cross-linking agent is 0.1%-50% and the addition amount of the initiator is 0.1%-10% in terms of the mass of the vinyl hydrogen-based polycarbosilane being 100%. The invention aims to improve the compactness and the connection strength of the silicon carbide ceramic during connection.

The invention provides an epoxy resin composition, a prepreg, a laminated board and a metal foil-clad laminated board. The epoxy resin composition comprises the following components in parts by weight: A, 100 parts of epoxy resin; b, 120-390 parts of a curing agent; c, 50 to 200 parts of inorganic filler; the curing agent comprises B1 amino modified organosilicon polymer and B2 amine curing agent and / or phenolic curing agent, and the ratio of B1 to B2 is (1: 2)-(1: 7). The amino modified organic silicon and the amine and / or phenolic aldehyde curing agent are compounded to co-cure the epoxy resin, the overall crosslinking density is increased, and meanwhile, compounding of epoxy resin with different molecular weights is combined, so that the effect of increasing the heat resistance and toughness of a system is achieved. Meanwhile, an amino modified organosilicon polymer is introduced into an epoxy resin system, so that the soft degree of a curing molecular chain can be adjusted, the release of stress in the resin curing process is accelerated, and the effect of flatness of the surface of the prepreg and the plate is achieved.

The invention discloses an organic silicon filler surface treating agent with asymmetric different ends, a preparation method and application, and belongs to the field of organic silicon materials. The different-end asymmetric organic silicon filler surface treating agent is prepared by the following steps: A, adding a mixed solution of an organic cyclic siloxane monomer and an initiator into a reaction kettle, then adding an organic alkali solution, and carrying out stirring polymerization reaction at room temperature for 1-6 hours; and B, adding chlorosilane and an acid-binding agent into the polymerized system in the step A to carry out an end-capping reaction, continuously stirring for 1-20 hours, and then removing low-boiling-point substances and filtering, thereby obtaining the product. The organic silicon filler surface treating agent is accurate in molecular chain structure, controllable in double-terminal active groups, simple in preparation process and mild and controllable in reaction process, is applied to surface modification treatment of heat-conducting (electric-conducting) inorganic filler, can remarkably improve the compatibility between the inorganic filler and an organic silicon polymer, and has a good application prospect in the field of heat-conducting (electric-conducting) inorganic filler surface modification treatment. The dispersity and the filling amount of the inorganic filler in the polymer are improved, the heat conduction (electric conduction) performance of the organic silicon composite material is improved, and the viscosity of the composite material is reduced.

The invention relates to the technical field of modified organic silicon coatings, and discloses an acrylic acid modified organic silicon polymer, a solventless coating and a preparation method thereof.The acrylic acid modified organic silicon polymer is prepared from, by mass, 300 parts of polysiloxane, 100 parts of acrylic acid monomers and 1-2 parts of initiator; the polysiloxane is prepared by mixing alpha, omega-hydroxyl-terminated polymethylsiloxane and alpha, omega-hydroxyl-terminated poly (methyl-methyl vinyl) siloxane according to a mass ratio of (8 to 9): (1 to 2). The coating containing the organic silicon polymer is prepared from the following components in parts by mass: 260 parts of acrylic acid modified organic silicon polymer, 40 to 60 parts of alpha, omega-terminated methoxy polydimethylsiloxane, 5 to 10 parts of fumed silica, 15 to 25 parts of talcum powder, 40 parts of pigment paste, 25 to 30 parts of cross-linking agent, 10 to 20 parts of chain extender, 2.5 to 5 parts of A type coupling agent, 2.5 to 5 parts of B type coupling agent and 0.2 to 0.5 part of catalyst. The coating has the advantages of being environmentally friendly, high in strength, low in viscosity and suitable in surface drying time; the viscosity is below 1200 mpa.s, the tensile property of a corresponding coating is not lower than 3.8 MPa, and the surface drying time is within 45 min.

The invention discloses a flame-retardant reinforced polycarbonate composite material and a preparation method thereof, and belongs to the technical field of polycarbonate composites.The flame-retardant reinforced polycarbonate composite material comprises 70%-90% of polycarbonate resin, the polycarbonate resin is aromatic polycarbonate with the viscosity average molecular weight ranging from 20000 to 35000; the glass fiber is alkali-free chopped E glass fiber, and the surface of the glass fiber is treated by an amino silane coupling agent; the flame retardant comprises 5-15% of a phosphorus-nitrogen-silicon composite flame retardant, the composite flame retardant is a synergistic system formed by physically premixing a phosphate ester compound, a nitrogen charring agent and a silicone polymer, and the phosphate ester compound plays a role in gas-phase flame retardance and partial condensed-phase flame retardance during combustion. By adopting a phosphorus-nitrogen-silicon composite flame-retardant synergistic system, high flame-retardant efficiency is realized under the condition of low additive amount, the halogen-free and environment-friendly effects are realized, and the environmental and health hidden dangers of the traditional brominated flame retardant are overcome.

The invention belongs to the technical field of marine organism fouling protection, and particularly discloses a self-repairing coating for preventing biological fouling and a preparation method and application thereof, and the preparation method comprises the following steps: S1, adding polydimethylsiloxane and aliphatic diisocyanate into an organic solvent according to a molar ratio of 1: (1.0-3.0), continuously stirring for more than 0.5 h, and standing to prepare an organosilicon polymer solution; the polydimethylsiloxane is aminopropyl double end capped polydimethylsiloxane, and the polydimethylsiloxane is an aminopropyl double end capped polydimethylsiloxane; s2, adding methyl silicone oil into the organic silicon polymer solution, and continuously stirring for more than 0.5 hour to prepare a transparent organic silicon prepolymer; and S3, uniformly coating the surface of a substrate with the prepolymer prepared in the step S2, and standing to obtain the self-repairing coating for preventing biological fouling. Complete covering and damage self-repairing of a lubricating layer on the surface of the coating can be achieved, attachment and growth of fouling organisms are effectively prevented, and the coating is endowed with long-acting antifouling performance.

The present disclosure relates to organosilicon preceramic resin compositions for forming porous polymer-derived ceramic materials. It also relates to porous organosilicon polymer-derived ceramic materials, and methods for forming porous organosilicon polymer-derived ceramic materials.

The invention belongs to the technical field of lithium batteries, and particularly relates to a composite defoaming agent as well as a preparation method and application thereof. The composite defoaming agent comprises an epoxypropane-ethylene oxide segmented copolymer, a ZIF-8 packaging material, a temperature-sensitive copolymer and a conductive synergist, the ZIF-8 packaging material comprises ZIF-8 and a modified organic silicon polymer packaged in the ZIF-8, and the modified organic silicon polymer contains fluorine ions. According to the invention, the ZIF-8 packaging material and the thermo-sensitive copolymer are adopted, and other components are combined, so that the gas content of the negative electrode slurry and the resistance amplification of a pole piece can be reduced, and the storage stability, the thermal stability and the defoaming response efficiency can be improved; the defoaming agent has a good defoaming effect and a slow release effect, can inhibit thermal migration, and avoids interface resistance rise and phase separation.

The present embodiments relate generally to a soft system for producing a giant magnetoelastic effect. In some embodiments, the soft system is composed of platinum-catalyzed silicone polymer matrix and neodymium-iron-boron nanomagnets. The soft system shows up to four times more enhancement of the magnetomechanical coupling factor (T / Pa) than traditional rigid counterparts owing to a distinct physical mechanism. In embodiments, the giant magnetoelastic effect is coupled with magnetic induction to implement a soft magnetoelastic generator (MEG) as an approach to biomechanical energy conversion, a technology that was heretofore conventionally challenged by low current, high internal impedance, and low water / humidity resistance for decent operation stability. This new method of biomechanical-to-electrical conversion is intrinsically waterproof since the magnetic fields are able to penetrate water with negligible intensity loss. Thus, it was demonstrated to work stably on wet skin or in body fluids without any encapsulation, opening up alternative avenues for practical human-body centered energy, sensing, and therapeutic applications.

The invention belongs to the field of ceramic tile adhesives, and particularly discloses a modified organic silicon polymer for a ceramic tile adhesive, the ceramic tile adhesive, a preparation method and application. The preparation method comprises the following steps: reacting bis (3-aminopropyl) terminated polydimethylsiloxane with bisphenol A diglycidyl ether; and then adding sec-ammonia silane and continuously reacting to obtain the modified organic silicon polymer for the ceramic tile adhesive. The prepared modified organic silicon polymer can be used for preparing high-performance ceramic tile glue with excellent elasticity, adhesion, hydrophobicity and heat resistance, the defects of traditional cement-based ceramic tile glue are overcome, and the preparation method is simple, convenient, easy to implement, environmentally friendly and wide in application prospect.

The invention belongs to the field of organic silicon coatings, and particularly relates to a fluorine-containing organic silicon polymer, a preparation method thereof and application of the fluorine-containing organic silicon polymer in preparation of an organic silicon coating. The fluorine-containing organosilicon polymer is composed of a vinyl fluorine-containing organosilicon polymer, a hydrogen-based fluorine-containing organosilicon polymer, a silane coupling agent, a catalyst and an organic solvent. The fluorine-containing organic silicon polymer provided by the invention is applied to LED element packaging, and after the fluorine-containing organic silicon polymer is sprayed on the surface to form an organic silicon coating, the overall air tightness can be improved, so that the fluorine-containing organic silicon polymer has good luminous efficiency and the service life is prolonged.

An external additive for toner, wherein the external additive is an organosilicon polymer particle, and defining A (nm) as the number-average particle diameter of primary particles of the external additive measured using a scanning electron microscope, and defining B (nm) as the number-average particle diameter of the external additive measured in accordance with a centrifugal sedimentation method, the A and the B satisfy a following Expression (1):1.5≤B / A≤3.0  (1).

The present invention belongs to the field of marine antifouling, and particularly relates to a hybrid antifouling coating of a silicone polymer / POSS grafted with antibacterial molecules and a preparation method thereof. The antifouling coating is obtained by sol-gel reaction of an antibacterial silicone polymer, polyhydroxy POSS and castor oil, and the mass ratio of the antibacterial silicone polymer, polyhydroxy POSS and castor oil is 1: 0.01-0.1: 0.05-0.5. The antibacterial groups distributed on the surface of the coating prepared by the present invention have the characteristics of chemical antifouling, and retain the physical antifouling properties of the low surface energy of the silicone polymer, which significantly enhances the static antifouling ability of the coating. And the present invention chemically connects the flexible silicone polymer and the rigid POSS molecules at the molecular level, and the prepared coating has high mechanical properties and adhesion. The antifouling coating is eco-friendly, durable, and has broad application prospects in the field of marine antifouling.

Provided is a toner comprising: a toner particle containing a binder resin; and an organic silicon polymer particle on a surface of the toner particle, wherein the binder resin contains a crystalline resin, and when the toner particle is pelletized and a Young's modulus of the toner measured in a micro compression test at 25° C. is represented by TE (MPa) and when one organic silicon polymer particle is separated from the toner and a Young's modulus of the one organic silicon polymer particle measured in a micro compression test at 25° C. is represented by SiE (MPa), TE and SiE satisfies 800≤TE≤2500 and 1.5≤SiE / TE≤10.0.

The invention discloses a preparation method of a fluoride-free waterproof breathable film based on an irradiation technology. Comprising the following steps: uniformly mixing chitosan, an organosilicon polymer, a cross-linking agent, a catalyst, a pore forming agent and a solvent according to a ratio, and stirring until complete dissolution to prepare a membrane casting solution; coating the surface of a membrane treated by an irradiation technology with the membrane casting solution by using a blade coating machine to form a coated membrane; and drying the coating film to obtain the waterproof breathable film. The structure of the base film and the coating is adopted, so that the overall structural strength is improved, and the membrane can be placed under certain water pressure. The pore diameter and the pore density of the base membrane can be regulated and controlled, a pore-foaming agent is added into the coating, and the overall air permeability of the waterproof and breathable membrane can be flexibly regulated and controlled according to requirements. The organosilicon polymer and the cross-linking agent in the coating enhance the hydrophobicity, the mechanical strength and the durability of the coating. The waterproof breathable film prepared by the invention adopts fluorine-free substances. The waterproof breathable film prepared by the invention has a good application prospect in the field of electronic products.

A high oxygen permeability silicone hydrogel composition, contact lens made from the high oxygen permeability silicone hydrogel composition and manufacturing method of the contact lens are disclosed. The high oxygen permeability silicone hydrogel composition includes a first silicone polymer, a second silicone polymer, at least one hydrophilic monomer, a crosslinking agent, an initiator, and a solvent. By adjusting the ratio of each silicone polymer molecule and the hydrophilic monomer in the contact lens, the present invention can not only provide the contact lens with high oxygen permeability, but also expand the design scope of the silicone hydrogel contact lens.

A roof scaling system method of manufacture and method of application comprising three parts: a caulk gap filler, a mastic, and a top coating. All three components combine to create a singular scaled membrane when applied to a roof surface. The roof scaling system utilizes inert polyethylene fibers in a liquid silicone polymer.

The invention discloses a robot simulation skin and a preparation method of the robot simulation skin. The formula of the robot simulation skin is composed of 100 parts of an organosilicon polymer with a main chain containing double bonds, 30-45 parts of a hyperbranched phenyl silicone oil plasticizer, 5-18 parts of a nanoscale texture conditioning agent, 7-22 parts of a dynamic crosslinking system and 1.5-9 parts of a function response additive. Through cross-scale cooperation of an organosilicon polymer matrix and functional components, a conformational entropy buffer network of a hyperbranched plasticizer is constructed on a molecular level, a light-force energy flow channel decoupling mechanism of a core-shell regulator is formed on a mesoscopic level, space-time regulation and control of gradient crosslinking and photo-thermal response are realized on a macroscopic level, and meanwhile, the cross-scale cross-linked hyperbranched polymer has good application prospects. The physical essence of inherent contradictions of'high-temperature softening-low-temperature embrittlement 'and'light transmittance-elasticity mutual exclusion' of existing silica gel skin is broken through, and the sensitivity of conformation entropy change to temperature is reduced through the molecular topology confinement effect.

The invention relates to a water-repellent and oil-repellent composition and application thereof. The water-repellent and oil-repellent composition provided by the invention comprises an oil-repellent component and an amide polymer, wherein the oil-repellent component is selected from an organic silicon polymer and / or an organic fluorine polymer. The composition can effectively eliminate foams generated in the manufacturing process while ensuring water resistance and oil repellency of an article, especially a paper-plastic product, so that the qualification rate of the product is improved.

The invention belongs to the technical field of fiber preparation, and relates to a high-performance silicon carbide ceramic fiber membrane and a preparation method thereof. The silicon carbide ceramic fiber membrane is prepared from phenylboronic acid or a derivative thereof and an organosilicon polymer as raw materials through the steps of spinning, electron beam irradiation non-melting, sintering and high-temperature sintering. The preparation method of the silicon carbide ceramic fiber membrane provided by the invention has the characteristics of simplicity and high efficiency, and the prepared ceramic fiber membrane has excellent wave absorption and high temperature resistance, and has important application value in the fields of aviation, aerospace, national defense, energy and the like.

The invention provides a self-roughening type organosilicone super-hydrophobic finishing agent as well as a preparation method and application thereof, and belongs to the technical field of textile finishing. The preparation method comprises the following steps: mixing vinyl silicone oil with a platinum catalyst to obtain a first component; mixing vinyl silicone oil, hydrogen-containing silicone oil and an inhibitor to obtain a second component; mixing the first component and the second component with a reinforcing agent, dissolving in an organic solvent, adding water, and dispersing to obtain the finishing agent. According to the method disclosed by the invention, the finishing agent is formed by oversaturation and precipitation caused by the difference of solubility parameters of an organic silicon polymer in an organic solvent and water; when the finishing agent is used for fabric finishing, the finishing agent can be combined with heating curing treatment to promote rapid crosslinking of organic silicon liquid drops before complete diffusion on the surface of a fabric, so that construction of a self-rough surface is realized. The finishing agent can endow a fabric with an excellent hydrophobic effect, has good wear resistance, washing resistance and chemical stability, and has small influence on air permeability.

This relates to a method of manufacture of silicone-polyolefin hybrid material using silicone rubber bases comprising high viscosity (i.e., greater than 1 million mPa.s at 25ºC) silicone polymers, fillers, and suitable polyolefin materials in a conical screw dump extruder. Such high viscosity silicone polymers are often referred to in the industry as silicone polymer gums or silicone gums. The disclosure also relates to the resulting silicone-polyolefin hybrid materials, their uses and products made therefrom.

The invention discloses a supporting layer suitable for a composite current collector, a corresponding composite current collector and a battery. Wherein the supporting layer is formed by curing insulating adhesive liquid; the insulating adhesive liquid comprises a component A and a component B which are mixed, wherein the component A is at least one of polyurethane resin, acrylic resin, epoxy resin, polyester resin, polyimide, an organosilicon polymer and a modified compound thereof; the liquid B is at least one of amino resin, isocyanate, an aziridine cross-linking agent, carbodiimide, a silane coupling agent and an organic silicon tackifier; wherein the ratio of the component A to the component B is (90-99): (1-5). Compared with an existing supporting layer and an existing composite current collector, the viscous insulating layer structure can replace common PET, PP, PI and other types of base film middle supporting layer structures, the adhesive strength of the metal layer and the supporting layer is improved, and meanwhile additional hierarchical structures are avoided. And the production process is simplified, so that mass production is realized.

The invention discloses post-curing-free platinum catalyst original glue which comprises the following components in parts by mass: 5-60 parts of an organosilicon polymer, 0.1-5 parts of a platinum catalyst, 40-65 parts of mesoporous alumina, 0.2-3 parts of an antioxidant, 0.5-8 parts of an anti-settling agent, 0.03-6 parts of a dispersing agent and 3-10 parts of a solvent. The post-curing-free platinum catalyst raw rubber disclosed by the invention is excellent in oxidation resistance and good in dispersity and compatibility in an organosilicon heat-conducting adhesive formula, the modulus and rebound resilience of the material in a high-temperature long-term aging process are kept stable, and a post-curing phenomenon hardly occurs when the post-curing-free platinum catalyst raw rubber is applied to a heat-conducting adhesive formula containing a large amount of heat-conducting filler; the application requirements of high stability and high reliability of the heat-conducting glue are met.

The invention discloses a preparation method and application of a self-repairing polymer-based intelligent antibacterial antifouling coating. A reactive intelligent antibacterial functional element is introduced into an organic silicon polymer main chain, the coating is endowed with an on-demand antibacterial function, in the presence of bacteria, antibacterial molecules are protonized, the antibacterial molecules embedded in an inner cavity of cyclodextrin are changed into a separated state, and an efficient antibacterial mode is shown. Under the synergistic effect of antibacterial molecules and low surface energy of organic silicon, the antibacterial rate on escherichia coli can reach 99% or above, and the antibacterial rate on staphylococcus aureus can reach 98% or above. Besides, the self-repairing cross-linking agent is utilized, dynamic covalent bonds and multiple hydrogen bonds are introduced into a polymer network, the coating is endowed with excellent self-repairing capacity, and the repairing efficiency can reach 90% or above. The antibacterial coating prepared by the method has excellent antifouling and antibacterial properties and self-healing capability, can be widely applied to the fields of medical instruments, marine antifouling, food packaging and the like, and greatly prolongs the service life and improves the safety of the material.

The invention discloses an OCA (Optical Clear Adhesive) based on temperature-responsive visbreaking microspheres as well as a preparation method and application of the OCA. The OCA is prepared from the following raw materials in parts by mass: 100 to 105 parts of a main copolymer, 4 to 8 parts of the temperature-responsive visbreaking microspheres, 1 to 2 parts of boron nitride nanosheets, 0.8 to 1.2 parts of an antioxidant, 0.8 to 1.2 parts of a light stabilizer and 30 to 40 parts of a solvent, the main body copolymer is formed by graft copolymerization of urethane acrylate and an organic silicon modified composition; the organic silicon modified composition is composed of an organic silicon monomer and an organic silicon polymer; the temperature response type visbreaking microsphere takes a hollow microsphere protomer as a base sphere, the hollow microsphere is filled with silicone oil, and a shell is coated with fluorine-containing acrylate. The temperature-controllable visbreaking is realized through the temperature-responsive visbreaking microspheres, and meanwhile, the OCA prepared by the preparation method disclosed by the invention not only ensures optical transparency, but also realizes the synergistic performance of normal-temperature bonding, high-temperature visbreaking and folding resistance. The adhesive can be widely applied to the technical field of optical adhesives.

The present technology provides a curable silicone-based composition comprising a curable silicone polymer, a catalyst, an electrically conductive filler, and carbon nanostructures. The combination of the electrically conductive filler and the carbon nanostructures provide a cured material that exhibit good electrical conductivity and electromagnetic interference shielding.

The present application relates to a treating agent and a treated fiber fabric or coating. The treating agent includes a silicone polymer, an emulsifier, and an aqueous medium, wherein the silicone polymer includes structural units derived from monomer I, which includes a silicon monomer I-A and optionally a silicon monomer I-B, each of which is defined in the specification. The treating agent can simultaneously impart good oil and water repellency to a fiber fabric and good stain or graffiti resistance to a coating.