280 results about "Silicone polymer" patented technology

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 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 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).

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.

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.

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 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 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 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.

The invention belongs to the field of organosilicon polymer chemistry, and particularly discloses an organosilicon polymer, a self-emulsifying silicone oil emulsion and a preparation method. The organic silicon polymer is formed by polymerizing a monomer shown in a formula I and a monomer shown in a formula II; wherein the mass ratio of the monomer shown in the formula I to the monomer shown in the formula II is (1-9): 1; in the formula I, X is 25 to 450, and R is a C1-C18 alkyl group, a phenyl group, or a C1-C18 alkyl group with 1 to 2 amino substituent groups, and in the formula II, X is 25 to 450, and R is a C1-C18 alkyl group, a phenyl group, or a C1-C18 alkyl group with 1 to 2 amino substituent groups. Starting from the initial raw material octamethylcyclotetrasiloxane, the organosilicon polymer can be prepared by only three steps; the process is short and time is reduced; because hydrogen-containing silicone oil is not involved in the preparation process, byproducts are not generated, and water washing is not needed in the preparation process, so that water consumption and energy consumption are reduced.

The present disclosure provides silane compounds and silicone polymers, methods of preparing the silane compounds and silicone polymers, and use of the silane compounds and silicone polymers. The present disclosure further provides use of the silane compounds and silicone polymers as antidegradants.

Disclosed herein are new types of foam insulation, and in particular, foam insulation for the exterior surfaces of residential, industrial, institutional or commercial buildings made using new silicone spray foam systems. These inventions relate to isocyanate-free foams used for thermal insulation, flame-retardancy and water resistance. The foams are prepared from silicone polymers with non-fluorinated blowing agents and can be used in the construction industry.

The present invention relates to a thermal and / or acoustic insulation product for filling a building element comprising two facing walls forming a cavity, the product comprising blown glass wool forming flakes, the product comprising a hydrophobic additive, the hydrophobic additive being a branched and cross-linked organosilicon polymer compound, a median flake size being less than 20 mm.

COMPOSITIONS INCLUDING AN ORGANOSILICONE POLYMER AND AN AQUEOUS-PHASE FILM-FORMING AGENT. The invention relates to compositions including (a) water, (b) at least one oil, (c) at least one organosilicone polymer selected from a silicone acrylate copolymer, a glycerol silicone resin, and combinations thereof; and (d) at least one aqueous-phase film-forming agent, such as a copolymer including a vinyl pyrrolidone monomer. Skin-makeup processes are also proposed. Figure for abstract: none

Disclosed is a hair care composition comprising: i) a cleansing surfactant comprising an anionic surfactant; ii) a siloxane, wherein the average particle size of the siloxane is 50 nm to 800 nm; and iii) a compound comprising in its molecule a siloxane polymer, a quaternary ammonium group and a polyether; wherein the weight ratio of the amount of the siloxane to the amount of the compound is from 3: 1 to 20: 1.

The invention relates to the use of a substrate for shielding X-ray radiation. The matrix for radiation protection against X-ray radiation comprises at least one silicone polymer and at least one filler.

This invention provides an ethyl-containing alkoxy-terminated organosilicon polymer, its preparation method, and its applications. The preparation method includes: S1, mixing methylvinylcyclotetrasiloxane, a solvent, and a first catalyst, introducing hydrogen gas, and reacting at 50-70°C until the methylvinylcyclotetrasiloxane content is no higher than 5%, filtering to remove impurities and obtain the product; S2, under nitrogen protection, ring-opening the product obtained in step S1 with acetic anhydride in the presence of a ring-opening catalyst, neutralizing and hydrolyzing, removing impurities, and obtaining the product; S3, under nitrogen protection, reacting the product of step S2 with hexamethyldisilazane at 40-50°C for 1-3 hours, adding N,N-diethylamino-trialkoxysilane, and reacting at 50-60°C for 1-3 hours. The polymer obtained by this invention, as a thermally conductive powder treatment agent, can effectively improve the dispersion performance of powders and enhance the heat resistance of products without reducing their tensile strength.

A method of making an oven cavity of a cooking appliance, and a cooking appliance made therewith, are provided. The method includes forming a composite sheet via sheet molding compound. The composite sheet includes glass fiber impregnated with silicone polymer. An intermediate assembly is formed by disposing a layer comprising an insulative material onto a first layer of the composite sheet. The intermediate assembly is inserted into a mold. A compression load is applied to the intermediate assembly in the mold to obtain a molded piece. One or more of the molded piece forms a composite body that defines the oven cavity of the cooking appliance. The silicone polymer may include one or more of poly dimethylsiloxane, poly methylphenyl silanol, poly diphenyl silanol, and poly vinyl functional backbone silicones having methyl hydrosilane crosslinkers. The insulative material may include ceramic foam, hollow glass microspeheres, or recycled glass powder.

The application discloses a diaphragm with a self-layering coating, a preparation method thereof and a related secondary battery and an electric device. A battery diaphragm comprises a base film and a coating arranged on at least one surface of the base film, wherein the coating is obtained by one-time coating of a slurry, the slurry comprises an amino-modified organic silicon polymer, an amino-modified inorganic filler and an epoxy resin, the content of the amino-modified organic silicon polymer on the upper surface of the coating is denoted as V1, the content of the amino-modified organic silicon polymer on the lower surface of the coating is denoted as V2, and V1>V2. According to the embodiment of the application, the heat resistance and the adhesion of the base film can be simultaneously improved by one-time coating, and the heat shrinkage resistance of the diaphragm can be improved by the amino-modified organic silicon polymer, the amino-modified inorganic filler and the epoxy resin.

Polishing composition containing abrasive grains, a water-soluble polymer, an aggregation inhibitor and water, wherein the polishing composition is characterized in that, The water-soluble polymer of at least one is selected from the group consisting of cellulose and polysaccharides; The aggregation inhibitor of at least one is selected from a group consisting of vinyl-based water-soluble polymers, oxyalkylene polymers, oxyalkylene copolymers and silicone polymers; and If the mean particle size of the particles contained in the polishing composition is defined as R1, and the mean particle size of the abrasive grains in the case where the abrasive grains are dispersed in water to have the same concentration as the concentration of the abrasive grains in the polishing composition is defined as R2, then R1 / R2 is 1.3 or less.

An improved process for the preparation of high viscosity (i.e., greater than 1 million mPa·s at 25° C.) silanol-terminated silicone polymers and copolymers, often referred to in the industry as silanol-terminated silicone polymer gums. The silanol-terminated silicone polymer gums are made by the ring-opening polymerisation of organocyclosiloxane oligomers (alternatively referred to as cyclic siloxane oligomers) using a conical screw dump extruder (1). It also relates to silanol-terminated silicone polymer gums made by the process.

An electrophotographic belt having a base layer and a surface layer on the base layer, wherein the surface layer comprises an organosilicon polymer as a binder and a silica particle as a roughening particle, a content of the silica particle in the surface layer is 2.5 to 20.0% by mass, and when a reflectance of a surface layer side of the electrophotographic belt to light with a wavelength of from 800 to 1000 nm and an incident angle of 0° is measured, a minimum value of the reflectance at the wavelength of from 800 to 1000 nm is 1.5% or more, and a difference between a maximum value and a minimum value of the reflectance at the wavelength of from 800 to 1000 nm is 0.5% or less.

The present invention pertains to: a functionalized thermoplastic polyurethane containing a novel chain extender having functionality capable of chemically bonding to a prepolymer polymerized by reacting a polyol (P) with a diisocyanate (R); a functional composite material containing one or more monomers or polymers selected from the group consisting of an anionic functional group, an amphoteric functional group, a perfluorinated compound, a hydrogel, and a silicone polymer; a method for producing same; and an article including same.

The present invention provides hydrophobic coatings for transparent surfaces and processes of producing the same, whereby the invention is embodied by a transparent multilayer structure, comprising: a transparent substrate having an antireflective coating; a transparent surface coating comprising reactive hydroxyl groups, such as a silicon dioxide coating applied onto said transparent substrate; and a hydrophobic coating applied onto the outer layer of said transparent surface coating comprising reactive hydroxyl groups, whereby said hydrophobic coating comprises a fluorine free silicone polymer.