4864 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.

Problem to be Solved To provide an ophthalmic lens, which can be more safely worn, that is, to provide a material, which is transparent and has high oxygen permeability and a high hydrophilic property, and to provide a novel monomer to be a raw material thereof.Solution A hydrophilic polysiloxane macromonomer contains polyoxyethylene as a hydrophilic side chains in a polysiloxane main chain, wherein transparency, oxygen permeability, and hydrophilic properties of the material are controlled by regulating the length of the polysiloxane main chain, the length of the hydrophilic polyoxyethylene side chains, and the number of the side chains.

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 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 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.

Coating compositions are provided which are formed from components comprising (a) at least one polysiloxane comprising at least one reactive functional group; (b) at least one reactant comprising at least one functional group that is reactive with at least one functional group selected from the at least one reactive functional group of the at least one polysiloxane and at least one functional group of at least one reactant; and (c) a plurality of particles, wherein each component is different, and wherein the at least one reactive functional group of the at least one polysiloxane and the at least one functional group of the at least one reactant are substantially nonreactive with the particles. A multi-component composite coating composition formed from a basecoat and a topcoat deposited from the curable coating composition also is provided. The multi-component composite coating compositions of the invention provide highly scratch resistant color-plus-clearcoatings capable of retaining scratch resistance after weathering.

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.

Polysiloxanes suitable for the preparation of intraocular lenses by a crosslinking reaction, having a specific gravity of greater than about 1.0, a refractive index suitable for restoring the refractive power of the natural crystalline lens and a viscosity suitable for injection through a standard cannula are provided. Moreover, injectable intraocular lens material based on these polysiloxanes and methods of preparing intraocular lenses by direct injection into the capsular bag of the eye are also disclosed.

The invention relates to organopolysiloxanes comprising (meth)acrylate groups, to a process for their preparation and to their use as radiation-curing coating materials.

The invention is directed to a liquid laundry detergent composition comprising at least one detergent ingredient selected from the group consisting of anionic surfactant, zwitterionic surfactant, amphoteric surfactant, and mixtures thereof; a coacervate phase forming cationic polymer; and one or more fabric care ingredients selected from the group consisting of one or more cationic silicone polymers comprising one or more polysiloxane units and one or more nitrogen moieties; one or more amino silicone polymers; one or more nitrogen-free silicone polymers; and mixtures thereof; and a liquid carrier for providing cleaning and fabric care benefits. A process for preparing such compositions, a method for treating substrates, a method for providing certain fabric care benefits and the use of such compositions are also described.

An article is described including an article surface and a coating set comprising a tie coating or layer of SiOxCy or Si(NH)xCy applied to the article surface, a barrier coating or layer of Six, and a pH protective layer of SiOxCy or Si(NH)xCy. The respective coatings or layers can be applied by chemical vapor deposition of a polysiloxane or polysilazane precursor in the presence of oxygen. Examples of such an article are a prefilled thermoplastic syringe or thermoplastic pharmaceutical vial with a coated interior portion containing a pharmaceutical preparation or other fluid with a pH of 4 to 8, alternatively 5 to 9. The barrier coating or layer prevents oxygen from penetrating into the thermoplastic syringe or vial, and the tie coating or layer and pH protective coating or layer together protect the barrier layer from the contents of the syringe or vial.

The instant invention pertains to a curable composition comprising (a) substance that generates free radicals under the action of ultraviolet radiation and (b) polymer molecule bearing functionality capable of polymerization under the action of said free radicals wherein (a) is a benzoin ether and makes up from 0.001 to 10 wt % of the total composition and (b) has the following formula(R3SiO1 / 2)a(R'2SiO2 / 2)b(R''SiO3 / 2)c(SiO4 / 2)din which R, R', and R'' are each H or C1 to C10 hydrocarbyl possibly containing a heteroatom and at least 10% is, for example, a vinyl group, and a+b+c+d=1. The composition of the instant invention is a storage-stable UV-curable composition that does not suffer from cure inhibition by air or oxygen, that is very efficiently cured by low doses of UV radiation, and provides a highly heat-resistant cured pattern by heating after pattern formation.

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.

A water-base resin has both excellent storage stability and excellent curability at room temperature, the water base resin being obtained by mixing a composite resin (C) and a polysiloxane (D), bringing about a condensation reaction partially between them if necessary, and thereafter dispersing or dissolving the resulting mixture or partially condensed product into a water-base medium, wherein the composite resin (C) comprises a polysiloxane segment (A) and a polymer segment (B), the polysiloxane segment (A) having at least one silicon atom selected from the group consisting of a silicon atom bearing at least one organic group having a total carbon number of at least 3 together with at least one hydrolyzable group and / or at least one hydroxyl group, a silicon atom bearing one hydrolyzable group or one hydroxyl group together with two groups selected from the group consisting of methyl groups and ethyl groups, and a silicon atom bearing at least one triorganosiloxy group together with at least one hydrolyzable group and / or at least one hydroxyl group, and the polymer segment (B) having at least one type of hydrophilic group selected from the group consisting of an anionic group, a cationic group, and a non-ionic group, and wherein the polysiloxane (D) has a hydrolyzable group bonded to a silicon atom and / or a hydroxyl group bonded to a silicon atom, the polysiloxane (D) having a structure represented by the following structural formula (S-I) as an essential structural unit:(wherein R1 in the formula denotes a methyl group or an ethyl group). A water-base curable resin composition comprising the water-base resin as an essential component produces a cured material which possesses excellent resistance stain during outdoor exposure as well as excellent durability such as acid rain resistance and gloss retention during outdoor exposure.

The invention provides a super-hydrophobic coating material, which comprises water or emulsifier or organic solvent, a polysiloxane compound having more than three silicon-hydrogen bonds and solid particles. The invention also provides the preparation method of the super-hydrophobic coating material and the preparation method of a super-hydrophobic coating. The invention provides the super-hydrophobic coating material which is prepared by a simple method, has high mechanical strength, is durable, practical and capable of self-cleaning and the preparation method of the super-hydrophobic coating material. The super-hydrophobic coating material provided by the invention can solidify in a wider temperature range and is applicable to substrates made of various materials such as metal, glass and high polymer materials.

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.

The present invention relates to compositions comprising polysiloxanes suitable for the preparation of accommodating intraocular lenses, having a specific gravity of greater than about 1.0, a refractive index suitable for restoring the refractive power of the natural crystalline lens and a viscosity suitable for injection through a standard cannula. The present invention includes intraocular lenses made from said polysiloxane compositions having a Young's modulus less than about 10 kPa.

A flame retardant thermoplastic composition having excellent physical properties that includes 20 to 90 wt. % of a polycarbonate resin; from 1 to 35 wt. % of an impact modifier; from 0.5 to 30 wt. % of a polysiloxane-polycarbonate copolymer including from 8 to 30 wt. % polydimethylsiloxane units or the equivalent molar amount of other diorganosiloxane units; from 0.5 to 20 wt. % of a phosphorus-containing flame retardant, and from 3 to 30 wt. % of metal fiber, each based on the total combined weight of the thermoplastic composition, exclusive of any filler. In one embodiment, a molded sample of the thermoplastic composition having a thickness of 3.0 mm (±10%) has an EMI shielding of at least 20 dB. In addition, a molded sample of the thermoplastic composition is capable of achieving UL94 V0 or V1 rating at a thickness of 1.5 mm (±10%). The compositions are useful in forming flame retardant articles having EMI shielding characteristics.

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 SiO4 / 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) (SiO4 / 2)(RaRb2SiO1 / 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 relates to organic silica gel for packaging a large-power LED and a preparation method thereof. The gel is prepared by mixing a component A of vinyl-contained polysiloxane, a silicon resin component B, a component C of hydrogen-contained polymethylsiloxane, a platinum catalyst component D, a catalytic inhibiting agent component E and a thickening agent component F, and the obtained packaging gel with different refractive rates of 1.4 grade, 1.5 grade, and the like is used for packaging various types of large-power LEDs or is used as other optical purposes. By adopting the component B as a filling material, the invention solves the problems of temperature resistance, color change, light transmittance and needle penetration reduction of the large-power LED product, can be made into two packaging types of a single component and double components, improves the adaptability on packaging equipment and the manufacture procedure and the efficiency, reduces the cost and is convenient for use.

A shallow trench isolation structure is formed in a semiconductor substrate adjacent to an active semiconductor region. A selective self-assembling oxygen barrier layer is formed on the surface of the shallow trench isolation structure that includes a dielectric oxide material. The formation of the selective self-assembling oxygen barrier layer is selective in that it is not formed on the surface the active semiconductor region having a semiconductor surface. The selective self-assembling oxygen barrier layer is a self-assembled monomer layer of a chemical which is a derivative of alkylsilanes including at least one alkylene moiety. The silicon containing portion of the chemical forms polysiloxane, which is bonded to surface silanol groups via Si—O—Si bonds. The monolayer of the chemical is the selective self-assembling oxygen barrier layer that prevents diffusion of oxygen to a high dielectric constant material layer that is subsequently deposited as a gate dielectric.

A composition containing a polycarbonate, a polycarbonate-polysiloxane copolymer, an impact modifier, and a polyetherimide, wherein the polycarbonate comprises greater than or equal to about 50% by weight of the combined weights of the polycarbonate, polycarbonate-polysiloxane copolymer, impact modifier and polyetherimide and wherein a 3.2 millimeter thick, 7.6 centimeter square sample of the composition produces a smoke density (Ds) of less than 275 after a 4-minute burn, measured according to ASTME 662-03. In one embodiment, a composition may contain about 60 to about 85 wt. % polycarbonate, about 8 to about 20 wt. % polycarbonate-polysiloxane copolymer, about 0.5 to about 20 wt. % impact modifier, and about 1 to about 10 wt. % polyetherimide.

An object of the present invention is to provide a polysiloxane compound that can be developed in an aqueous alkali solution and can yield a cured product or thin film having superior heat-resistant transparency and insulating properties, a curable composition thereof, and a thin film transistor provided with a passivation layer or gate insulator using the same, and the present invention relates to a polysiloxane compound having at least one photopolymerizable functional group in a molecule thereof, and having at least one member selected from the group consisting of an isocyanuric acid backbone structure, a phenolic hydroxyl group and a carboxyl group within the same molecule, to a curable composition containing the polysiloxane compound, and to a cured product thereof.