174 results about "Silicone Elastomers" patented technology

The invention relates to the technical field of PC resin flexibilizers, and discloses a shell-core structure styrene-acrylic resin modified organic silicon elastomer flexibilizer as well as a preparation method and application thereof in order to solve the problems that an organic silicon material and PC resin are poor in intersolubility, a traditional flexibilizer is poor in low-temperature toughening performance and the like. Comprising the following steps: uniformly mixing hydrogen-containing silicone oil, vinyl silicone oil, a third alkenyl functional component and a catalyst, and pre-emulsifying under the action of a surfactant and a thickener to obtain an organic silicon pre-emulsion SiE; uniformly mixing an alkenyl phenyl compound, acrylate and / or a cross-linking agent, adding a molecular weight regulator and an oil-soluble initiator, and pre-emulsifying under the action of a surfactant and water to obtain a styrene-acrylic pre-emulsion SAE; the preparation method comprises the following steps: firstly, preparing an organic silicon pre-emulsion, then heating the organic silicon pre-emulsion to carry out a water-phase hydrosilylation addition reaction, then dropwise adding the styrene-acrylic pre-emulsion to carry out suspension emulsion copolymerization, and then demulsifying and drying to obtain the styrene-acrylic resin modified organic silicon elastomer toughening agent with the core-shell structure.

The invention discloses a high-temperature-resistant organic silicon elastomer with high mechanical property as well as preparation and application thereof, and belongs to the technical field of functional materials. The high-temperature-resistant organic silicon elastomer with high mechanical property is prepared from the following raw materials: hydroxyl silicone oil, white carbon black nanoparticles, a silane monomer cross-linking agent, a silane coupling agent and stannous octoate, and the catalyst also comprises cage-shaped titanium oxygen cluster molecules. According to the invention, by simultaneously using the components, the composite high-temperature-resistant organic silicon elastomer material can be provided, the thermal collapse temperature of the material is almost 500 DEG C, and the composite high-temperature-resistant organic silicon elastomer material is good in thermal stability and mechanical tensile strength and wide in application prospect.

The invention discloses an elastic powder block type cosmetic product and a preparation method thereof. The elastic powder block cosmetic product comprises a powder component, an oil phase component, a preservative and an antioxidant, the oil phase component comprises an organic silicon elastomer, an ester composition and silicone oil; wherein the organic silicon elastomer is prepared from a polydimethylsiloxane / vinyl polydimethylsiloxane cross-linked polymer; the ester composition comprises isononyl isononanoate and diisostearyl malate, and the mass ratio of isononyl isononanoate to diisostearyl malate is (2: 1)-(3: 1); the silicone oil comprises polydimethylsiloxane; the mass ratio of the organic silicon elastomer to the ester composition is (1: 11)-(1: 13.5). The elastic powder block type cosmetic product is moderate in viscosity, light and thin in texture and good in ductility, stability and makeup maintaining performance.

The invention discloses a silicone gel dressing and a production process thereof. The silicone gel dressing comprises a three-dimensional cross-linked organic silicone elastomer network and a stably dispersed functional unit, wherein the functional unit comprises a nanosheet layer reinforcing structure formed by stripping organic modified layered silicate and polysaccharide-based microspheres for encapsulating bioactive factors. The production process comprises the steps of nano pre-dispersion preparation, main component mixing and defoaming, active microsphere mild mixing and gradient curing structure forming. The contradiction between technical effect analysis and flexibility is solved through a nanosheet layer enhanced structure, the polysaccharide-based microspheres achieve slow release of bioactive factors, the air permeability and the adhesion are improved through a sandwich porosity gradient structure, the process is accurate and controllable, and the method is suitable for scar management.

The present invention relates to the use of silicone elastomers obtainable from defined addition cross-linked organopolysiloxane compositions in dielectric elastomer actuators (DEAs), which allow for significantly prolonged lifetime compared to prior art DEAs.

The invention discloses organic silicon modified wood lacquer and a preparation method thereof, and relates to the technical field of coatings. The invention discloses organic silicon modified wood lacquer. The water-based silicone sealant is prepared from the following raw materials in parts by weight: 20 to 35 parts of hydroxyl-terminated polydimethylsiloxane, 8 to 15 parts of methyltrimethoxysilane, 12 to 20 parts of bio-based polyol, 6 to 12 parts of isophorone diisocyanate, 3 to 8 parts of modified nano titanium dioxide, 5 to 10 parts of polyvinylidene fluoride, 4 to 9 parts of modified organosilicone elastomer, 0.2 to 0.8 part of dibutyltin dilaurate and 1 to 3 parts of ammonium polyacrylate. 0.5 to 1.5 parts of polyether modified polysiloxane, 2 to 6 parts of alcohol ester-12 and 15 to 30 parts of deionized water. According to the organic silicon modified wood lacquer, hydroxyl-terminated polydimethylsiloxane serves as a matrix, cross-linking is conducted through methyl trimethoxy silane, toughening is conducted through bio-based polyhydric alcohol, an interpenetrating network structure is formed in cooperation with multiple layers of modified nano titanium dioxide and the organic silicon elastomer, the organic silicon modified wood lacquer has high cross-linking density and flexibility, a coating is compact, and weather resistance is high.

The present application belongs to the technical field of antifouling coating, and particularly relates to an enzyme-containing organic silicon fouling release type antifouling coating and a preparation method thereof. The coating is mainly composed of amphiphilic functional polymer and antifouling enzyme. The antifouling enzyme is fixed by the amphiphilic functional polymer containing amino groups, and the antifouling enzyme is kept active by the hydrophilic property of the amphiphilic functional polymer. The enzyme-containing organic silicon fouling release type antifouling coating is prepared by adding the amphiphilic functional polymer immobilized antifouling enzyme into an organic silicon elastomer system. The organic silicon chain segment is used as an oleophilic part, and the antifouling enzyme is used in combination with the amphiphilic functional polymer. The stability of the antifouling enzyme in the organic solvent system and the seawater environment is ensured, the organic silicon elastomer coating has good antifouling performance and good environmental friendliness, the antifouling performance is further improved, the enzyme immobilization technology can be applied to the surface antifouling of marine ships and structures, and the enzyme immobilization technology can be applied to the pharmaceutical industry and daily chemical industry.

The invention discloses wide-temperature-range silicone rubber-based rubber for aerospace thermal protection, a composite material and a preparation method of the wide-temperature-range silicone rubber-based rubber. According to the invention, three monomers, i.e., methylcyclosiloxane, hexaethylcyclotrisiloxane and phenylene silicon monomer, are subjected to ring opening and condensation copolymerization to obtain polysiloxane macromolecules containing three different chain link structures. A phenylene structure is introduced into a silicon rubber main chain, so that the silicon elastomer main chain is limited to form a volatile cyclic oligomer through a chain back-biting reaction and a chain segment rearrangement exchange reaction, the thermal stability is improved, and the initial decomposition temperature is up to 450.16 DEG C; the regularity of a molecular chain is broken by introducing ethyl, so that the glass-transition temperature is as low as 120.2 DEG C, and no crystallization phenomenon occurs. The base adhesive has excellent cold resistance, radiation resistance, ablation resistance, high temperature resistance and the like, and can be used as the base adhesive to be applied to the aspects of aerospace craft protective coatings, dynamic seal putty adhesives, sealants and the like.

The invention relates to the technical field of viscous materials, in particular to a low-temperature-resistant viscous material for a high-altitude damper. Comprising the following components: 30-50 parts of silicone rubber; 50-60 parts of modified silicone rubber; 10 to 30 parts of polar rubber; 20 to 50 parts of modified white carbon black; 10 to 40 parts of high rubber powder; 10 to 20 parts of a crosslinking accelerator; 10 to 50 parts of organic silicon elastomer micro powder; 1 to 3 parts of diphenyl silanediol; 1-5 parts of phenyl silicone oil; 1-5 parts of a damping agent; and 1 to 2 parts of 2, 5-dimethyl-2, 5-bis (tert-butylperoxy) hexane. The prepared low-temperature-resistant viscous material can keep stable viscosity at an extremely low temperature, improves the adaptability in a wide temperature range, has efficient energy consumption capacity, has small influence on the structure, has excellent weather resistance, and can meet the requirement of low maintenance.

A silicone elastomer composition contains the following components: (a) hydroxyl-functional polyorganosiloxane gum; (b) pendant alkenyl-functional polyorganosiloxane gum; (c) silylhydride-functional crosslinker containing an average of at least 2 SiH groups per molecule; (d) hydrosilylation catalyst; (e) hydrosilylation inhibitor; (f) solvent; (g) optionally, terminal alkenyl-functional polyorganosiloxane gum that is free of pendant alkenyl groups; and (h) optionally, tetraalkoxysilane; where: (i) the silicone elastomer composition is free of MQ resin; (ii) the weight ratio of components (a) / (b) is in a range of 0.1 to 10; (iii) the mole ratio of (SiH) / (C＝C) is in a range of one to 20; and (iv) the weight percent of alkenyl groups relative to total weight of components (a), (b) and (g) is in a range of 0.035 to 1.00.

In a method of applying a desired texture to a surface of a silicone elastomer, an uncured silicone elastomer is applied to at least one side of a polymeric film. At least one side of the polymeric film has a complementary texture that is complementary in shape to the desired texture. The uncured silicone elastomer is cured while it is in contact with the at least one side of the polymeric film so as to form a cured silicone elastomer. The polymeric film is removed from the cured silicone elastomer so as to expose the desired texture on the surface thereof. The flexible polymeric film can be a bag placed into a breast prosthesis mold. The bag includes at least one interior surface with the complementary texture. The bag is removed from the cured silicone elastomer to expose the breast prosthesis having a textured surface.

The present invention relates to a thickened aqueous composition comprising from about 0.01% to about 10% by weight of a superabsorbent polymer, from about 0.1% to about 20% of a silicone elastomer; and from about 20% to about 98% of water.

A silicone elastomer composition which is generally storage stable, and cures to an elastomeric body, comprising; (i) an organopolysiloxane polymer having at least two hydroxyl or hydrolysable groups; (ii) a siloxane and / or silane cross-linker having at least three groups per molecule which are reactable with the hydroxyl or hydrolysable groups in the organopolysiloxane polymer (i); (iii) a solid organosilicate resin which is substantially unreactive with components (i) and (ii) and comprising R32SiO1 / 2 and SiO4 / 2 siloxane units, wherein the molar ratio of the R32SiO1 / 2 siloxane units to SiO4 / 2 siloxane units is from 0.5:1 to 1.2:1, and R2 is selected from hydrocarbon groups; and optionally (iv) a suitable condensation cure catalyst. The solid organosilicate resin (iii) is generally utilised to create a low modulus room temperature vulcanisable (RTV) silicone composition which when cured may be used as a coating, an adhesive or a sealant having high movement capability.

A method for sealing joints in removable slabs (1a, 1b) separated by gaps (E) without fibrous elements, comprising, for at least one of said gaps: a. the creation of a joint backing by positioning at the bottom of said gap one or more elastic elements (2) made of preformed polymer foam with a cross-section adapted to fill the width of said gap (E), b. filling an upper portion of said gap (E), above the joint backing, with a layer of two-component silicone elastomer (3) curable by polyaddition, c. curing said two-component silicone layer (3) to create a removable sealing coating for said gap. Figure 3

The invention discloses a method for preparing highly uniform silicone elastomer gel by accurately controlling in-situ cross-linking reaction, and relates to the technical field of preparation of high polymer materials and organic silicone gel. The invention relates to a silicone sealant, which comprises the following components: a dispersion medium: 60 wt%-90 wt% of polyorganosiloxane; a first reactant: 10 wt%-30 wt% of polyorganosiloxane containing at least two aliphatic unsaturated groups in the molecule; a second reactant: 0.5 wt%-10 wt% of polyorganosiloxane, the molecule of which at least contains two silicon-bonded hydrogen atoms (Si-H); the catalyst is a platinum-based catalyst and is used for promoting the hydrogen silicification reaction. The preparation method comprises the following steps: 1, mixing a first reactant and a second reactant in a dispersion medium with the viscosity of 2-100 cSt, and removing oxygen through nitrogen substitution; and 2, adding a platinum catalyst into the mixture obtained in the step 1, and carrying out an in-situ cross-linking reaction on the polysiloxane containing the aliphatic unsaturated group and the polysiloxane containing the silicon-bonded hydrogen atom so as to directly form particles.

The present disclosure relates to a hydrosilylation (addition) curable silicone rubber composition, a silicone elastomer material produced by curing the hydrosilylation (addition) curable silicone rubber composition and having improved high temperature (≧190°C) compression set according to ISO 815-1 Method A, and a method for preparing the silicone elastomer material.

The application belongs to the field of new materials, and discloses a kind of organic silicon elastomer, which is prepared from branched hydrogen-containing silicone oil and crosslinking agent containing olefin bond function;The branched hydrogen-containing silicone oil is prepared from hydrogen-containing silicone oil and single-end vinyl silicone oil.The organic silicon elastomer is polymerized by using branched hydrogen-containing silicone oil and crosslinking agent containing olefin bond function, and the single-end vinyl silicone oil first occupies part of the Si-H bond of the hydrogen-containing silicone oil, the crosslinking agent occupies the remaining Si-H bond of the hydrogen-containing silicone oil, and a small amount of crosslinking is combined through the side chain winding in the elastomer, which improves the light transmittance and viscosity of the gel containing the elastomer.The application also provides a preparation method of the elastomer, daily chemical products containing the elastomer and the use of the elastomer.

To provide a crosslinkable silicone composition that enables formation of a silicone elastomer exhibiting a high dielectric constant and low elastic modulus.SOLUTION: A crosslinkable cyclic carbonate-modified silicone composition comprises: a linear or branched cyclic carbonate-modified silicone polymer (A) having a weight-average molecular weight of 2500 or more and containing structural units having a vinyl group and structural units having a cyclic carbonate group in a side chain; and a linear or branched cyclic carbonate-modified silicone polymer (B) having a weight-average molecular weight of 2500 or more and containing structural units having a hydrosilyl group and structural units having a cyclic carbonate group in a side chain; wherein, in the silicone polymer (A), a ratio of the branched structural units to the total of the linear and branched structural units is 0 to 30 mol%, and in the silicone polymer (B), a ratio of the branched structural units to the total of the linear and branched structural units is 0 to 30 mol%, and the crosslink density is 0.35 mmol / g or more.SELECTED DRAWING: None

The application discloses an extreme environment stable fatigue fracture self-adhesion ion skin and a preparation method and application thereof. The ion skin is formed by combination of chemically inert low cross-linked polydimethylsiloxane elastomer and perfluoroether rubber respectively with a stretchable ion conductive elastic fiber network through mechanical interlocking technology; wherein the polydimethylsiloxane elastomer is prepared by polymerization and curing of a silicone elastomer base and a PDMS curing agent, the perfluoroether rubber is obtained after solvent volatilization of a perfluoroether rubber solution, and the stretchable ion conductive elastic fiber network is obtained by electrospinning; the strength of the ion skin is greater than or equal to 9.9 MPa, the toughness is greater than or equal to 10 MJm ‑3 , the tensile strain is greater than or equal to 355%, the tensile toughness is greater than or equal to 5.7 MJm ‑3 , and the breaking energy is greater than or equal to 71.6 kJm ‑2 . The application of the ion skin in preparation of a flexible stretchable electronic device in an extreme environment. The application has simple process, excellent mechanical properties, extreme environment tolerance and self-adaptive surface adhesion capacity.

This invention provides a novel silicone elastomer particle with excellent biodegradability and the ability to impart superior tactile and usability to cosmetics, as well as its uses. The biodegradable silicone elastomer particle has a structure in which at least two silicon atoms within the silicone elastomer particle are cross-linked through divalent organic groups containing hydrophilic groups, and the silicone elastomer particle contains -(R₂SiO₂) m The polyorganosiloxane structure represented by - (where R is an unsubstituted or halogenated alkyl group with 1 to 20 carbon atoms, an aryl group with 6 to 22 carbon atoms, or a hydroxyl group with 6 to 22 carbon atoms, and m is a number in the range of 1 to 1000).

Title: MATTE SOLID COMPOSITION COMPRISING A PARTICULAR NON-POLAR HYDROCARBONATE OIL, A LIPOPHILIC CLAY, AND METHOD FOR IMPLEMENTING IT. The present invention relates to a matte solid cosmetic composition, preferably in stick form, intended for application to the skin and / or lips, comprising: * at least 5% by weight, relative to the total weight of the composition, of at least one first non-polar hydrocarbon oil, saturated or unsaturated, preferably saturated, linear or branched, preferably branched, in C14-C19, * at least one mineral or organic filler comprising at least one lipophilic clay-type filler comprising at least one quaternary ammonium group, said lipophilic clay-type filler being present at a content of between 1 and 3% by weight, relative to the total weight of the composition, * at least one second oil selected from non-volatile hydrocarbon oils, polar or non-polar, different from the first oil.or non-volatile silicones, *at least one silicone elastomer in a form carried in at least one oil identical or different from the first or second oil. It also relates to a makeup and / or skin and / or lip care process, consisting of applying said composition.

A piezoelectric composite energy harvester (100) is disclosed, comprising a piezoelectric element (102) and an elastic cover layer (110). The piezoelectric element comprises a first electrode (104), a second electrode (106), and a piezoelectric layer (108), the piezoelectric layer (108) comprising a cross-linked silicone elastomer matrix and piezoelectric particles dispersed within the cross-linked silicone elastomer matrix. The elastic cover layer (110) is disposed over the exterior of the second electrode (106). The piezoelectric composite energy harvester is configured to bend, expand, contract, rotate, tilt, and / or move in any spatial direction.

Stoma interface devices and methods for manufacturing the same for total laryngectomy and select partial laryngectomy patients that fit directly into the tracheostoma where the devices provide a support which can interface with standardized tracheostoma components (e.g., speaking valves) and offer hands-free alternatives for tracheoesophageal (TE) speech production. Devices hereof comprise a body having a self-expanding frame coated in multi-durometer silicone elastomers to form a distal portion with a distal flange configured to engage the tracheostoma of the patient, and a proximal portion configured to interface with the tracheostoma components.

The subject application relates to an article and method of making. An article includes a polymer composition, the polymer composition including a silicone elastomer and a hydrogen peroxide degradation catalyst.

Disclosed are methods to maintain the durability of silicone-thermoplastic composite articles, which comprise flame-retardant thermoplastics and silicone elastomeric materials, with age by incorporating a stabilizing additive in the silicone elastomeric materials. This disclosure also provides improved silicone-thermoplastic composite articles and uses for such silicone-thermoplastic composite articles. A silicone-thermoplastic composite article comprises: (i) a thermoplastic article comprising one or more flame-retardant additives, wherein the thermoplastic article has an available surface; and (ii) a cured silicone elastomer part in direct contact with the available surface of the thermoplastic article (i). The silicone elastomer part is the cured product of a silicone elastomer composition comprising from 0.25 wt. % to a maximum of 5 wt. % of a stabilizing additive. The stabilizing additive is selected from the group consisting of magnesium carbonates, magnesium hydroxy carbonates, magnesium oxide, and mixtures thereof.

The present disclosure relates to a process for preparing a coating composition (v) based on a methanol-terminated silicone / polyurethane hybrid prepolymer, the process comprising the steps of: (A) preparing a methanol-terminated silicone / polyurethane hybrid prepolymer; and (B) preparing the coating composition (v) based on the methanol-terminated silicone / polyurethane hybrid prepolymer by mixing the methanol-terminated silicone / polyurethane hybrid prepolymer prepared in (A) ((v) (a)) with optionally a cured silicone elastomer powder (v) (b); optionally silicon-free organic particles and / or microparticles (v) (c); a polyorganosiloxane (v) (d) containing at least two or alternatively at least three silicon-bonded hydrogen (-Si-H) groups per molecule; a polyisocyanate having three or more isocyanate groups per molecule, the polyisocyanate being in an amount such that the molar ratio of-OH groups of (v) (a) to-NCO groups in (v) (f) in the methanol-terminated silicone / polyurethane hybrid prepolymer-based coating composition (v) is from 0.95: 1 to 1.05: 1; and a platinum group metal-based catalyst (v) (g). The coating composition based on the methanol-terminated silicone / polyurethane hybrid prepolymer is prepared for use in silicone leather composites.

The present invention relates to novel cerium (IV) organometallic compounds, to a method for preparing said cerium (IV) organometallic compounds and to their use as condensation catalysts, for example for curing polyorganosiloxane polymers comprising at least two hydroxyl groups or hydrolysable groups per molecule and suitable condensation curable crosslinkers Use of the silicone composition. Such compositions may comprise various additives, and may be stored in a one-part or multi-part composition. The present disclosure also relates to silicone elastomers and cured silicone sealants and / or adhesives prepared by curing the composition using a cerium (IV) organometallic compound as a catalyst.

The invention discloses an anticorrosive coating with super-hydrophobic and self-repairing functions and a preparation method and application thereof.The preparation method comprises the steps that a two-dimensional carbon material is added into ethyl acetate to form uniform dispersion liquid, then an organic silicon elastomer and thermosetting resin are added in sequence, coating dispersion mixed liquid is obtained through magnetic stirring, and the coating dispersion mixed liquid is added into the two-dimensional carbon material to form the anticorrosive coating with the super-hydrophobic and self-repairing functions. Wherein the range of the mass ratio of the organic silicon elastomer to the thermosetting resin is 1: 0.5-1: 3, and the mass concentration of the two-dimensional carbon material in the dispersion liquid is 0.05-2 mg / mL. According to the anti-corrosion coating, self-recovery super-hydrophobicity within 5-15 minutes after damage is achieved through the molecular chain dynamic recombination characteristic of the organic silicon elastomer, the contact angle change is smaller than 5 degrees after 100 times of damage-recovery circulation, and performance degradation does not exceed 5% after the coating is continuously soaked in 10 wt% saline water for 100 hours. The anti-corrosion coating is widely applied to metal corrosion prevention, oil-water separation and solar evaporator preparation, a compact protection layer is formed on the metal surface, the anti-corrosion coating is free of corrosion after 1000 hours of neutral salt spray testing, the adhesive force reaches 0-1 level, and excellent comprehensive performance is shown.

The present invention relates to personal care compositions that deliver effective sunscreen through topical compositions that combine the pleasant organoleptic properties of both cream and mousse-type compositions. Thus, the product delivers high SPF through a composition that yields a very light / fluffy easily blended form with a silky smooth final feel. This is achieved by combining highly selective high contents of silicone elastomers and oils with selective low contents of inorganic pigments.

This invention relates to organosilicon compositions crosslinked via a polyaddition reaction, intended for use in the production of thermally conductive elements. The organosilicon compositions comprise at least one organopolysiloxane A, each molecule having at least one C2-C bonded to silicon. 12 Alkenyl group; at least one organopolysiloxane B having at least two SiH units per molecule; at least one polyaddition catalyst C with a catalytically effective amount; and thermally conductive filler D, characterized in that the organopolysiloxane A has a linear structure, a viscosity of 50 mPa·s to 200 mPa·s at 25°C, and contains 130 ppm to 1000 ppm by mass of silicon-bonded OH groups.