47 results about "Silicone matrix" patented technology

A green product for use in fabricating a ceramic article comprises a ceramic powder immobilized within a silicone matrix, wherein the silicone matrix comprises one or more cross linked or polymerized silicone monomers and/or oligomers, wherein the one or more cross linked or polymerized silicone monomers and/or oligomers have a alkenyl reactive functional group and a hydride reactive functional group. Processes for forming a green product and a ceramic core with the silicone monomers and/or oligomers are also disclosed.

A conducting silicone matrix incorporating a suspension of a drug in ionized and non-ionized phases in an emulsion of a hydrophobic polymer. In one version, the drug is prepared as a concentrated aqueous suspension incorporated in a silicone matrix with a silicone surfactant. An electrolyte may be incorporated into the silicone matrix for increasing its conductivity. When a current is applied, the drug in individual globules in the drug suspension migrates away from the electrode and becomes concentrated at the distal side of the globules eventually resulting in an increase in the drug concentration distal to the electrode and adjacent to the skin and thereby resulting in transfer of the active drug through the skin. This system provides a matrix with minimal electroendosmotic flow that is current efficient and provides a drug reservoir that can last for several days during application of the drug.

The present invention relates to topical compositions containing solid particles that are stabilized via encapsulation into a cross-linked silicone matrix. The solid particles are preferably formed of a metal oxide, such as zinc oxide or titanium dioxide, and the cross-linked silicone matrix is preferably formed by cross-linking a silicone having branched reactive alkoxyl moieties in the presence of a stannous carboxylate cross-linking agent. The stabilized particles of the present invention can readily be used either alone or in combination with other skin care actives to form topical compositions with improved stability and performance.

An injection port assembly for a tissue expander and/or mammary prosthesis comprising a composite silicone matrix having embedded fiber layers. The composite matrix materials may cover or extend from the outside perimeter of the injection port assembly and provide self sealing polymeric materials if punctured by a needle. The tissue expander and injection port assemblies and structures may be formed of MR scannable materials. The injection port structures may have palpation lumps for locating the injection port structure subsequent implantation. The injection port structure may be remotely located from the tissue expander and connected thereto via tubing.

The present invention relates to topical compositions containing solid particles that are stabilized via encapsulation into a cross-linked silicone matrix. The stabilized particles possess an electrical potential sufficient to prevent the particles from penetrating into the skin. The particles can readily be used either alone or in combination with other skin care actives to form topical compositions with improved stability and performance.

A method for forming a silicone hydrogel contact lens is disclosed, wherein a lens body is formed by curing a mixture of silicone lens matrix, including a filling material, which is water soluble or organic solvent soluble. The lens body, once formed, is processed by water or organic solvent extraction to remove part or whole filling material from the silicone matrix of the lens body. Whereby densely distributed and interconnected pores are formed in the lens body to provide additional wettability required for the contract lens. This method is also applicable of to making other optical medical devices, such as an intraocular lens.

A composite structure comprising a fabric layer encapsulated in a silicone polymer or silicone rubber matrix. The fabric layer preferably comprises a woven fabric that includes apertures through which silicone polymer may penetrate during fabrication to provide complete or virtually complete encapsulation thereof in the silicone matrix Because of the method of fabrication, the fabric layer resides closer to one surface of the composite structure so that its esthetic design can be seen from at least one surface of the composite structure. Relatively heat resistant fabrics such as cotton and Nomex® are specifically preferred as the fabric portion, however, Teflon® coated fibers of other woven materials may also provide preferred structures. The incorporation of a thermally insulating ceramic into the silicone matrix further enhances the thermal insulating properties of the composite.

The invention relates to an abradable material composition comprising a resin-based matrix, in particular a silicone matrix together with filler comprising hollow beads. In characteristic manner, the hollow beads withstand high temperatures and are made of refractory material. The hollow beads are preferably made of an alumino-silicate material. The composition is applicable to making abradable coverings for compressor casings, in particular casings for compressors of the low pressure type or of the booster type, or for a fan, the covering being in register with moving blades.

The invention discloses a preparation method of a high heat conduction composite silicone gasket. The preparation method comprises the following steps: sieving spherical alumina particles; sintering the spherical alumina particles; grinding methylsilicone oil, polysiloxane, silicon dioxide, methylvinyl silicone rubber and a silane coupling agent; stirring; vacuumizing; and vulcanization molding and the like. Compared with the prior art, the high heat conduction composite silicone gasket disclosed by the invention has the advantages that silicone components are reasonably proportioned, and thespherical alumina particles are sieved, so that the alumina particles are reasonably distributed in a silicone matrix and the heat conductivity coefficient of the alumina particles is improved; the silicone gasket disclosed by the invention has high insulating property; and in addition, the heat conductivity coefficient of the silicone gasket is improved to 6.0 W or above which is out of reach bythe prior art.

A fiber-reinforced silicone matrix resin matrix with higher resistance to delamination is produced by incorporating a suitable toughness and lower modulus silicone resin than the matrix resin between each fiber layer of the composite material. composite material. Preferably, a glass or carbon fiber woven mat impregnated with a predetermined silicone matrix resin is coated with a precursor to a tougher filler layer silicone. Laminates created by alternately spaced resin-fibrous layers and tougher silicone filler layers provide a tougher silicon-based composite.

The invention belongs to the field of molecular biology and mainly relates to a universal kit and method for extracting DNA from trace plant materials. The yield of DNA extracted once through the kit and the method can completely meet the requirement of direct whole genome sequencing. The kit and the method mainly comprise a thin silicon matrix adsorption column capable of adsorbing genome DNA to the maximum extent and a unique extraction buffering liquid system which is matched with the silicone matrix adsorption column and can extract various plant tissues and DNA in different parts of plants to the maximum extent. The kit and the method have the advantages of rapidness, convenience, no need of phenol-chloroform extraction, avoidance of organic solvent pollution and the like, and pigments, grease and other impurities in the DNA extraction process can be simply and conveniently removed to the maximum extent due to the thin adsorption column. Valuable plant samples are saved, and pretreatment steps and time of whole genome sequencing are greatly reduced and shortened.

The invention discloses a high-toughness and high heat conduction composite silicone gasket. The high-toughness and high heat conduction composite silicone gasket is prepared from the following components in parts by weight: 400 to 600 parts of alumina particles, 120 to 180 parts of dimethicone, 10 to 20 parts of polysiloxane, 1 to 8 parts of MQ silicon resin, 5 to 15 parts of methylvinyl siliconerubber, 3 to 8 parts of a silane coupling agent, 3 to 12 parts of a silica reinforcement agent, 1 to 3 parts of a catalyst and 0.3 to 0.8 part of an inhibitor. Compared with the prior art, the high-toughness and high heat conduction composite silicone gasket disclosed by the invention has the advantages that silicone components are reasonably proportioned, and the spherical alumina particles aresieved, so that the alumina particles are reasonably distributed in a silicone matrix and the heat conductivity coefficient of the alumina particles is improved; the silicone gasket disclosed by the invention has high insulating property; and in addition, the heat conductivity coefficient of the silicone gasket is improved to 6.0 W or above, which is out of reach by the prior art. Besides, the silicone gasket disclosed by the invention has superstrong toughness and can still keep higher toughness and strength in the preparation process of sheets.

The invention discloses a high thermal conductivity composite silicone gasket. The high thermal conductivity composite silicone gasket is prepared from the following components in parts by weight: 400to 600 parts of alumina particles, 150 to 220 parts of methyl silicone oil, 10 to 20 parts of polysiloxane, 15 to 25 parts of silica, 5 to 15 parts of methyl vinyl silicone rubber, 3 to 8 parts of asilane coupling agent, 1 to 3 parts of a catalyst and 0.3 to 0.8 part of an inhibitor. Compared with the prior art, the high thermal conductivity composite silicone gasket disclosed by the invention has the advantages that silicone components are reasonably proportioned and the spherical alumina particles are screened, so that the alumina particles are reasonably distributed in a silicone matrix and the heat conductivity coefficient of the alumina particles is improved; and the silicone gasket has high insulating property and the heat conductivity coefficient is improved to 6.0 W or above which is out the reach by the prior art.

The invention discloses a photocurable liquid silicone rubber catalyst with a high dispersibility, and a preparation method thereof. The preparation method of the catalyst comprises the following steps: S1, reacting chloroplatinic acid, used as a platinum source, with a strong alkali at a temperature of 80-100 DEG C to obtain a metal hexahydroxyplatinate; S2, reducing tetravalent platinum in the metal hexahydroxyplatinate into divalent platinum, coordinating the divalent platinum with silane-functionalized acetylacetone, performing stirring and refluxing for 3-12 h to suspend solid powder in a solution; and S3, filtering the solid powder suspended in the solution, washes the solid powder with water multiple times, and drying the solid powder at a temperature of 50-70 DEG C to obtain the catalyst for photocuring. The problems of poor dispersibility in a silicone matrix and high consumption of existing catalysts are effectively solved.

A skin compatible component attachable to mammalian skin. The component is formed as a foamed silicone matrix comprising a polyorganosiloxane derived silicone polymer and moisture control particulate distributed within the polymer network being configured to absorb moisture from the skin. The foamed skin compatible component may be utilised as an ostomy wafer or flange to secure an ostomy appliance to the skin and in particular peristomal skin.

A skin compatible component attachable to mammalian skin. The component is formed as a silicone matrix comprising a polyorganosiloxane derived silicone polymer and a moisture control particulate and permeability modifying polymer distributed within the polymer network. The skin compatible component may be utilised as an ostomy wafer or flange to secure an ostomy appliance to the skin and in particular peri-stomal skin.