4593 results about "Polysiloxene" patented technology

The invention provide a new class of silicone-containing prepolymers containing dangling polysiloxane-containing polymer chains. This class of silicone-containing prepolymer is capable of being actinically crosslinked to form a silicone hydrogel material with a relatively high oxygen permeability, a reduced elastic modulus, and a relatively high ion permeability. The present invention is also related to silicone hydrogel contact lenses made from this class of silicone-containing prepolymers and to methods for making the silicone hydrogel contact lenses.

The invention is directed to aqueous liquid laundry detergent compositions for cleaning and imparting fabric care benefits to fabrics laundered therewith and to methods for preparing such compositions. Such compositions comprise (A) at least one textile-cleaning surfactant; (B) droplets of miscible silicones comprising both a polarly-functionalized, preferably nitrogen-containing amino or ammonium functionalized, polysiloxane component and a nitrogen-free non-functionalized or non-polarly-functionalized polysiloxane component; and (C) a perfume component comprising fragrant aldehydes and/or ketones or a pro-perfume capable of providing such aldheyde and/or ketone perfume materials in situ. Incorporation of a polarly-functionalized polysiloxane fabric care agent into liquid laundry detergent compositions by miscibly combining it with a non-functionalized or non-polarly functionalized polysiloxane minimizes the undesirable interaction such polarly-functionalized silicone material might otherwise have with aldehyde and/or ketone perfume compounds.

The invention belongs to the technical field of a new chemical material, and in particular relates to a high-durability super-hydrophobic self-cleaning coating material and a preparation method thereof. The coating material of the invention is prepared by curing and drying nanoparticles with photo-catalytic activity, a low-surface-free-energy polymer and a cross-linking agent at the room temperature, wherein the low-surface-free-energy polymer consists of one or more of polysiloxane fluoride, dimethyl silicone polymer and polyphenylene methyl siloxane, which contain active groups, such as hydroxyl alkoxy group, carbon-carbon double bond, silanol group, siloxy group, and the like; the cross-linking agent is hydrogen-containing silicone oil or aminosilane; and the mass content of the photo-catalytic nanoparticles in the coating ranges from 10 to 60 percent. The coating is formed into a micro-nanostructure by nanoparticle self-organization; a super-hydrophobic self-cleaning coating with lotus effect is prepared from the coating and a cross-linked filming matrix with low surface energy; the persistence of a lotus-shaped super-hydrophobic characteristic of the coating is realized by using the photo-catalytic decomposition characteristic of an organic pollutant for the nanoparticles; and thus the material is suitable for large-area construction and has high weathering resistance andprominent self-cleaning characteristic.

The invention provide a class of chain-extended polysiloxane crosslinkers which comprises (1) at least two polysiloxane segments, wherein each pair of adjacent polysiloxane segments is linked by one divalent organic radical which includes at least one pendant hydrophilic group (hydroxyl and/or carboxyl groups) or at least one dangling hydrophilic polymer chain and a di-thioether linkage —S-DR—S— in which DR is a divalent organic radical; and (2) two terminal ethylenically unsaturated groups. The present invention is also related to a polymer comprising crosslinking units derived from chain-extended polysiloxane crosslinker of the invention and to ophthalmic lenses comprising such a polymer.

The invention discloses a preparation method of hydrophilic block polyether aminosilicone. The method comprises the following steps of: preparing terminal hydrogen-containing silicone oil: mixing hydrogen-containing double end enclosures, polysiloxane and acid, reacting, adding sodium carbonate under a vacuumizing condition, adjusting the pH, filtering a solid out, and extracting a low-boiling-point substance under reduced pressure to obtain low hydrogen-containing silicone oil; preparing epoxy silicone oil: mixing the obtained terminal hydrogen-containing silicone oil with allyl epoxy polyether and a catalyst, and reacting to obtain epoxy silicone oil; and preparing block polyether aminosilicone: and mixing the obtained epoxy silicone oil, polyetheramine, a catalyst and a solvent, reacting, cooling, adding an emulsifier for emulsifying, and adding glacial acetic acid for adjusting the pH to obtain the block polyether aminosilicone. According to the hydrophilic block polyether aminosilicone prepared with the method, the handfeel of a treated fabric can reach the handfeel of ordinary aminosilicone, and the treated fabric can keep a hydrophilic function permanently, is prevented from yellowing, and has high antistatic property.

Disclosed herein is a process for preparing a linear hydroxyaryloxy-functional polydiorganosiloxanes having controlled structures. The process includes the step of reacting a linear α,ω-bisacyloxypolydiorganosiloxane with at least one bisphenolic compound, or hydroxy-functional oligomer thereof, in such a molar ratio that the phenolic groups in the bisphenolic compound or the hydroxy-functional oligomer thereof to the acyloxy groups in the α,ω-bisacyloxypolydiorganosiloxane is less than 2.0. Also disclosed are hydroxyaryloxy-functional polydiorganosiloxanes produced from the process and the polysiloxane/polyorgano block copolymers made using the hydroxyaryloxy-functional siloxanes.

A hydrosilylation catalyst is provided wherein a platinum catalyst is enclosed in a heat-fusible compound having a melting point of 40-200 DEG C. and containing an aliphatic unsaturated bond, carbonyl, carboxyl or thioether radical in a molecule. The catalyst is blended in organo-polysiloxane to form a silicone composition having both shelf stability and fast-curing capability.

The invention relates to a siloxane-based elastomer intended for controlling the permeation of drugs, wherein the elastomer includes 3,3,3,-trifluoropropyl groups attached to the Si-atoms of the siloxane units. The invention relates also to a method for the preparation of a siloxane-based elastomer including 3,3,3,-trifluoropropyl substituents, where the elastomer is intended for controlling the permeation of drugs. In the method either i) a 3,3,3,-trifluoropropyl-substituted vinyl-functional polysiloxane component and a silicon hydride-functional crosslinking agent are crosslinked in the presence of a catalyst, or ii) a 3,3,3,-trifluoropropyl-substituted polysiloxane component is crosslinked in the presence of a peroxide catalyst.

The present invention provides a curable polysiloxane composition which is excellent in light resistance (particularly ultraviolet resistance) and adhesion and has a sufficient heat resistance/hydrothermal resistance and film-forming property and which generates little foaming at curing and does not generate cracks, peeling, coloring, and foaming even when used for a long period of time. A curable polysiloxane composition which comprises a specific hydrosilyl group-containing polysiloxane compound, a specific polysiloxane compound comprising two or more silanol groups in one molecule, and a dehydrogenative condensation reaction catalyst.

A solventless cured release coating-forming organopolysiloxane composition having a viscosity at 25° C. of 50 to 2,000 mPa·s comprising (A) 100 weight parts of an alkenyl-functional diorganopolysiloxane that has a viscosity of 25 to 1,000 mPa·s; (B) 0.5 to 15 weight parts of a diorganopolysiloxane that has a viscosity of at least 10,000 mPa·s and that has an aliphatically unsaturated group content of no more than 0.1 mole %; (C) 0.5 to 5 weight parts of a branched organopolysiloxane that has more than one SiO_4/2 unit and that is a polymer product provided by an equilibration polymerization between a branched organosiloxane oligomer represented by the average siloxane unit formula (1) (SiO_4/2)(R^aR^b₂SiO_1/2)_x(1) and a diorganosiloxane oligomer; (D) a specific amount of an organohydrogenpolysiloxane that has a viscosity of 1 to 1,000 mPa·s; and (E) a hydrosilylation reaction catalyst in a catalytic quantity.

The invention relates to silicon rubber with high refractive index and high transparency for optical encapsulation and a preparation method thereof. The silicon rubber is prepared from a phenyl vinyl polysiloxane component A, a silicon resin component B containing phenyl vinyl, a phenyl component C containing hydrogen polyoxyalkylene, a platinum catalyst component D, a catalytic inhibitor component E, a modified polysiloxane component F, and a water remover component G in a mixing manner. The silicon rubber not only has over 1.50 of refractive index, but also is good in transparency, excellent in adhesion, and stable in performance, can resist heat and ultraviolet radiation for a long period of time, can meet various requirements of LED (light-emitting diode) encapsulation, and is an ideal encapsulation material of the LED. The silicon rubber can be packaged into a bi-component product; the product has good storage stability; and high transparency is still kept after the product is stored for over 6 months.

A polymer composition is provided which is white and opaque (i.e. shields from light). The polymer composition comprises a blend of (i) a silicon-free polycarbonate polymer and (ii) a polycarbonate-polysiloxane copolymer; a whitener such as titanium dioxide; and (iii) a non-white colorant such as carbon black. The resulting composition, when molded and measured at a thickness of 0.75 mm, has an L* of greater than 80 and a % T of less than 1%. The composition also has good impact strength at low temperatures and good stability during processing.

The invention belongs to the technical field of self-repairing elastomer materials, and discloses a high-strength room-temperature self-repairing polyurethane elastomer based on multiple dynamic reversible effects as well as preparation and application thereof. A preparation method comprises the following steps: 1) reacting a dihydric alcohol with a diisocyanate under the action of a catalyst to obtain a prepolymer; wherein the dihydric alcohol is a mixture of more than one from a polyether glycol and a polysiloxane glycol; 2) reacting a dicarboxylic acid chain extender with the prepolymer toobtain an oligomer; adding a diamine chain extender, continuously reacting, and carrying out subsequent treatment to obtain polyurethane; wherein the dicarboxylic acid chain extender and the diamine chain extender are collectively called as chain extenders, and the chain extenders contain disulfide bonds and pyridine groups; 3) in an organic solvent, reacting polyurethane with a metal salt cross-linking agent, and removing the solvent to obtain the high-strength room-temperature self-repairing polyurethane elastomer. The preparation method is simple and mild in condition, and the prepared polyurethane elastomer is excellent in mechanical property and high in self-repairing efficiency and is applied to a flexible substrate materials, wearable equipment and intelligent protective coating.

A powder composition comprising, a copolymer containing (A) an organopolysiloxane monomer, one or more kinds of monomer selected from a group composed by (B) a monomer containing nitrogen group, a monomer possessing a polyoxyalkylene group, a monomer possessing a polylactone group, a monomer possessing a hydroxyl group and a monomer possessing an anionic group and a powder. Further, a powder dispersion in oil comprising said copolymer, powder and oil, and a cosmetic composition containing them. Said powder composition and a powder dispersion in oil have a less cohesion of powder particles and is superior in a dispersing ability and a dispersion stability, and the cosmetic composition which contains said powder composition has a good stability and gives an excellent sensation at the actual use.

Provided are: an addition polymer of fluorosilsesquioxane (a) having one addition polymerizable functional group or an addition copolymer of the fluorosilsesquioxane (a) having one addition polymerizable functional group and an addition polymerizable monomer (b); a coating film including the polymer or the copolymer; and an addition copolymer of the fluorosilsesquioxane (a) having one addition polymerizable functional group and organopolysiloxane (c) having an addition polymerizable functional group, or an addition copolymer of the fluorosilsesquioxane (a) having one addition polymerizable functional group, the organopolysiloxane (c) having an addition polymerizable functional group, and the addition polymerizable monomer (b).