66 results about "Hydrosilylation" patented technology

The present disclosure relates to a silicone foam adhesive composition comprising (a) at least one polyorganosiloxane containing at least 2 silicon-bonded alkenyl groups per molecule, (b) at least one polyorganosiloxane containing at least 2 silicon-bonded hydrogen atoms per molecule, (c) a porogen capable of generating hydrogen gas in the presence of (b), comprising (c1) a polyorganosiloxane containing at least 1 silicon-bonded hydroxyl group per molecule, and (c2) water, and (d) a hydrosilylation catalyst; provided that the molar ratio of the hydroxyl groups in component (c2) to the hydroxyl groups in component (c1) is in the range of 1:5 to 20:1. The composition has a lower viscosity, a longer working time, and the cured foam has a lower density, fine and uniform cells.

Provided is a novel curable organopolysiloxane composition and the like that can be used in the production of semiconductor components and the like. A curable organopolysiloxane composition comprising: (A1) an organopolysiloxane having no curable functional group having an aliphatic unsaturated bond within the molecule, and containing at least 20 mol% or more of siloxane units represented by SiO 4 / 2 (A1-1) in the total siloxane units; (A2) an organopolysiloxane having at least one monovalent hydrocarbon group having an aliphatic unsaturated bond in one molecule; (B) an organohydrogenpolysiloxane containing at least two silicon-bonded hydrogen atoms in one molecule; (C) a first hydrosilylation catalyst that exhibits activity by irradiation of high-energy rays; and (D) a second hydrosilylation catalyst microencapsulated by a thermoplastic resin having a softening point in the temperature range of 50 to 200°C.

This application relates to the field of hydrosilylation, and in particular to a highly efficient catalyst for hydrosilylation reactions and its preparation method. This application provides a method for preparing a microcapsule-form catalyst, which first modifies methyl-terminated hydroxyl silicone oil with silazane, and then forms a microcapsule coating system with paraffin, thereby improving the release performance of the microcapsule coating system, so that the catalyst has low reactivity in the early stage of release, thereby improving the uniformity of the reaction process inside the silicone rubber, and thus improving the transparency and overall strength of the silicone rubber.

This invention discloses a siloxane-modified epoxy resin and its preparation method, belonging to the field of epoxy resin modification technology. By introducing Si-O bonds into the epoxy resin molecular chain through a hydrosilylation reaction of hydrogen-containing siloxane cyclic molecules, the glass transition temperature of the modified resin can be significantly increased. Simultaneously, the dense siloxane cross-linked network can block the penetration of corrosive media such as water, acids, alkalis, and salts, thus improving the service life of the resin in humid and salt spray environments. The resulting siloxane-modified epoxy resin exhibits significantly improved mechanical properties such as heat resistance, weather resistance, stability, and toughness, solving the problem of reduced resin stability and heat resistance during modification processes in existing technologies.

The invention relates to an LSPC foamed sheet and a preparation method thereof, and belongs to the technical field of foamed materials. In order to solve the problems that an existing foamed stone-plastic plate is uneven in foam hole, insufficient in strength and prone to local collapse, a novel foam regulator is introduced into a PVC-based foaming system. According to the regulator, through hydrosilylation, ring opening and silane coupling reaction, a polysiloxane-alkyl ester functional structure is grafted on the surface of nano silicon dioxide, bubbles are induced to be uniformly nucleated by utilizing low surface tension of the functional structure, and bubbles are inhibited to be aggregated through an interface adhesion energy barrier, so that a uniform and fine closed-pore structure is formed. The density of the obtained LSPC board is reduced, and the LSPC board has excellent mechanical strength and high-temperature collapse resistance and is suitable for bearing, floor heating and other scenes.

The application discloses a kind of multistage synergic covalent grafting type hydrolysis-resistant self-cleaning PET submarine cable monofilament and preparation method, the monofilament includes three parts of core layer, skin layer and surface layer, the core layer is the high viscosity polyethylene terephthalate resin containing carbodiimide anti-hydrolysis agent;Skin layer is the modified PET resin of functional polysiloxane covalent grafting, wherein the functional polysiloxane has epoxy end group or isocyanate end group, and main chain has Si-H group;Surface layer is the fluorine-free low surface energy layer formed by polyvinyl long side chain alkane polysiloxane and residual Si-H group in skin layer through hydrosilylation reaction.The application significantly improves the durability of monofilament in humid heat environment, so that it is suitable for long-term humid heat service environment such as marine cable and industrial fabric, and can maintain stable mechanical strength and self-cleaning performance for a long time.

The application discloses a bisoxazoline pyridine functionalized porous organic polymer and preparation and application thereof; firstly, a styryl functionalized PyBox monomer (VPyBox) is designed and synthesized, and VPyBox, styrene and divinylbenzene are subjected to free radical polymerization under initiation of azobisisobutyronitrile in a certain proportion to obtain a series of porous organic polymers (POP-PyBox); the POP-PyBox can be used as a solid N , N , N tridentate ligand for Co-catalyzed hydrosilylation of arylalkynes with diphenylsilane; the heterogeneous catalyst system developed by the application has a catalytic activity comparable to that of a homogeneous catalyst reported in the literature, and the catalyst is easy to separate and recover; the recovered catalyst can be recycled for more than 6 times, which can not only greatly reduce the preparation cost of vinylsilane, but also simplify the post-treatment process and reduce the three wastes, and has a good practical application prospect.

This invention relates to a catalyst and its preparation method for a high-temperature resistant organosilicon heat transfer oil. The catalyst for the high-temperature resistant organosilicon heat transfer oil comprises: a Mn catalyst, a cyano ligand, and a reducing agent; wherein the Mn catalyst is Mn(CO)5Br; and the reducing agent is LiHBEt3. The catalyst and its preparation method for the high-temperature resistant organosilicon heat transfer oil described in this invention provide a low-cost catalytic system that can be used in the hydrosilylation reaction of hydrogen-containing silicone oil to prepare a high-temperature resistant organosilicon heat transfer oil.

This invention relates to the field of silicone oil technology, and more particularly to a high-temperature resistant, high-film-forming release agent silicone oil, its preparation method, and its applications. The method is based on polymethylhydrosiloxane, and involves the introduction of phenyl groups, long-chain alkyl groups, and ≤3 mol% of 3,3,3-trifluoropropyl side chains through a multi-step hydrosilylation reaction. Finally, a high-performance release silicone oil is obtained through end-sealing and high-temperature release. The resulting silicone oil possesses excellent thermal stability, lubricity, and film-forming properties, making it suitable for efficient release applications in high-temperature composite materials, precision injection molding, and microelectronics processing, significantly superior to existing technologies.

Provided is an organopolysiloxane compound serving as a raw material of an organopolysiloxane pressure-sensitive adhesive which has necessary and sufficient pressure-sensitive adhesive strength in a step such as temporary fixing or the like and can be easily peeled off from a substrate in a subsequent step; an organopolysiloxane pressure-sensitive adhesive composition containing the same; and a method for using the same. A chain co-modified organopolysiloxane containing a silicon-bonded functional group (RA) that contains a specific (meth)acrylic group and at least one aliphatic unsaturated carbon-carbon bond (RVi) (but excluding the functional group serving as RA above); a curable organopolysiloxane composition containing the same, further containing a crosslinking agent, a hydrosilylation reaction catalyst, and a photo-radical polymerization initiator, and having both heat curability and photo-curability.

An addition curable liquid silicone rubber composition for airbag includes an organopolysiloxane which is liquid at 25° C. and contains two or more alkenyl groups bonded to silicon atoms within one molecule, an organohydrogenpolysiloxane containing two or more hydrogen atoms bonded to silicon atoms within one molecule, a silica fine powder having a BET specific surface area of 50 m2 / g or more, a catalyst for hydrosilylation reaction, an organosilicon compound containing an adhesion-imparting functional group, an organopolysiloxane resin having a three-dimensional network structure, and iron(III) oxide monohydrate, α-iron(II) oxide, or both of them having a pH of 5 to 9.

This invention provides a phosphorus-silicon synergistic flame-retardant coolant for immersion liquid cooling and its preparation method, belonging to the field of thermal safety technology for energy storage batteries. The preparation method of the phosphorus-silicon synergistic flame-retardant coolant for immersion liquid cooling includes adding diphenyl phosphate, allyl alcohol, a condensing agent, and an esterification catalyst to a reaction vessel under an inert atmosphere to carry out an esterification reaction, obtaining the intermediate allyl diphenyl phosphate; subsequently, adding 1,1,3,3-tetramethyldisiloxane and a platinum catalyst to the reaction system to carry out a hydrosilylation reaction; after the reaction, purification treatment is performed to obtain a siloxane-bridged phosphate; the obtained siloxane-bridged phosphate is added to a base mineral insulating oil, and a high-efficiency antioxidant is added, followed by uniform mixing to obtain the phosphorus-silicon synergistic flame-retardant coolant. This method can solve the problems of insufficient oxidation stability, easy increase in acid value, and difficulty in simultaneously achieving flame-retardant efficiency and long-term stability in existing coolants under long-term high-temperature operation.

There is a need for a novel curable organopolysiloxane composition, etc. A curable organopolysiloxane composition comprising: (A) 100 parts by mass of a chain organopolysiloxane having a viscosity of 1,000,000 mPa·s or more at 25°C or having plasticity at 25°C and having an alkenyl group having 2 to 12 carbon atoms; (B) 5 to 80 parts by mass of a chain organopolysiloxane not having an alkenyl group having a viscosity of 500,000 mPa·s or more at 25°C or having plasticity at 25°C; (C) 0.1 to 20 parts by mass of a chain organopolysiloxane not having an alkenyl group having a viscosity of less than 500,000 mPa·s at 25°C; (D) an organohydrogenated polysiloxane having two or more silicon-bonded hydrogen atoms (Si-H) in one molecule; and (E) a hydrogenation silylation reaction catalyst.

A one-component pressure-sensitive adhesive composition comprises: (a) a silicone resin; (b) a linear silicone containing an average of at least two terminal alkenyl groups per molecule; (c) a reactive diluent having terminal alkenyl groups; (d) a crosslinking agent having at least two hydrogenated silyl groups per molecule; (e) a 1-COD hydrogenated silanization catalyst; (f) optionally, a hydrogenated silanization inhibitor; and (g) a non-reactive organic solvent comprising less than 10% by weight of the one-component pressure-sensitive adhesive composition.

This invention relates to the field of coating technology, specifically to a vinyl POSS-modified fluorinated polysiloxane coating, its preparation method, and its application. First, octavinyl POSS and fluorinated polysiloxane undergo a hydrosilylation reaction under the action of a catalyst to obtain a vinyl POSS-modified fluorinated polysiloxane polymer. Then, the polymer is mixed with vinyltriethoxysilane and cured by heating to obtain the coating. This invention introduces octavinyl POSS into fluorinated polysiloxane via hydrosilylation and uses vinyltriethoxysilane as a crosslinking agent for heating curing to obtain the product. This overcomes the degradation of material mechanical properties caused by agglomeration during physical blending, improves the hardness, friction, and adhesion of the original fluorinated polysiloxane, and achieves a light transmittance of up to 94.12%.

Disclosed is a silicone elastomer obtainable by a hydrosilylation reaction of an organopolysiloxane having at least two Si-H bonds and rubber seed oil. Also disclosed are a blend comprising the silicone elastomer and a solvent, a method for preparing the blend, and a skin care composition comprising the blend.

Disclosed is a crosslinked elastomer obtainable by a hydrosilylation reaction of a) a silane compound having at least two Si-H bonds; and b) an oligomer derived from metathesis of a natural oil; in the presence of a hydrosilylation catalyst and an optional solvent. Also disclosed are a gel comprising the elastomer and a solvent, methods for preparing the elastomer or the gel, and personal care compositions comprising the elastomer or the gel.

The present disclosure relates to an airbag and an airbag fabric article coated with a cured product of a hydrosilylated curable silicone rubber coating composition containing pre-formed silicone elastomer microparticles, and a method of coating said article, such as an airbag or an airbag fabric article, with said hydrosilylated curable silicone rubber coating composition containing pre-formed silicone elastomer microparticles.

This invention discloses a polyurethane foam based on halogen-free bio-based flame-retardant polyether polyol and its preparation method, relating to the field of flame-retardant material preparation technology. This application synthesizes a phosphorus- and silicon-containing bio-based flame-retardant polyether polyol through three steps: transesterification, dehydrogenation condensation, and hydrosilylation. This polyol is then reacted with isocyanate monomers, blowing agents, and other additives to obtain a polyurethane foam. The polyurethane foam is then sequentially impregnated in a dispersion containing modified aluminum hydroxide and a polyphosphoric acid solution. Through the reaction of amino groups with polyphosphoric acid, an organic-inorganic hybrid flame-retardant protective layer is formed on the surface of the polyurethane foam, resulting in polyurethane foam, further enhancing its flame retardancy.

The objective is to provide an addition-curing type thermally conductive silicone composition that exhibits stable curability even after long-term storage. [Solution] Components (A) to (E) below, (A) Organopolysiloxanes having alkenyl groups bonded to at least two silicon atoms in one molecule, (B) Organohydrogenpolysiloxanes having two or more hydrogen atoms (SiH groups) bonded to silicon atoms in one molecule, (C) At least one thermally conductive filler selected from the group consisting of metals, metal oxides, metal hydroxides, metal nitrides, metal carbides, and allotropes of carbon. (D) A platinum catalyst composition for hydrosilylation reactions obtained by mixing a platinum group metal complex (Da) having a vinyl group-containing organosiloxane represented by a specific formula as a ligand and a vinyl group-containing organopolysilyloxane (Db) represented by a specific formula, and heat-treating the mixture, and (E) Addition reaction regulator An addition-curing thermally conductive silicone composition characterized by containing [a certain substance].

This application discloses a tear-resistant silicone rubber and its preparation method. The tear-resistant silicone rubber comprises: 100 parts of raw silicone rubber, 2-6 parts of hydrogen-containing silicone oil A, 3-8 parts of an interface modifier, 0.05-0.3 parts of a platinum catalyst, 5-10 parts of carbon nanotubes, 5-10 parts of carbon black, and 1-2 parts of a structure control agent. The carbon nanotubes have a metal phthalocyanine complex attached to their surface. The interface modifier molecule contains Si-H and bipyridine groups. The interface modifier is prepared by hydrosilylation of hydrogen-containing silicone oil B with vinyl bipyridine. This application, by introducing a metal phthalocyanine complex onto the surface of carbon nanotubes and using hydrogen-containing silicone oil with bipyridine groups as an interface modifier, enables the silicone rubber to form a dynamic network during crosslinking, thereby achieving good interfacial bonding and significantly improving the tear resistance of the silicone rubber while maintaining excellent toughness.

The present invention relates to a microparticle platinum-maleimide resin complex comprising: a) a compound of Formula 1: where R is as defined herein; and b) a thermoplastic resin embedding the compound of Formula 1. The present invention addresses a need in the art by providing a microparticle platinum-maleimide resin complex that can be used to provide shelf-stable compositions cured rapidly by hydrosilylation.

[Problem] To provide a composition which can contain a large amount of a functional inorganic filler, is sufficiently hard at room temperature in an uncured state, has sufficient hardness even when compression-molded, has excellent hot melt properties and the like characterized by high fluidity at high temperatures, and gives a cured product. [Solution] Provided is a curable silicone composition characterized by: comprising (A) an organopolysiloxane resin that has a softening point of 30°C or more, has a curing reactive functional group, and contains 20 mol% or more of a T-unit, (B) an organohydrogenpolysiloxane, (C) hydrosilylation reaction catalyst-containing thermoplastic fine resin particles, (D) a functional inorganic filler, and (E) an organopolysiloxane resin that does not have a hydrosilyl reactive functional group in the molecule, that has a silanol group content of 5.0 mol% or less, and that contains 20 mol% or more of a T-unit; and exhibiting hot melt properties as a whole. Also provided are a molded product of the curable silicone composition and a use thereof.

This invention provides a silicon-chain acrylic liquid crystal photosensitive resin and its preparation method. A compound containing mesocrystalline units with -OH terminals, EHC, and catalyst 1 are mixed and reacted to obtain solution A. NaOH is added dropwise to solution A to remove the water generated in the reaction. After continuing the reaction, the product is filtered, and excess EHC is removed from the filtrate to obtain solution B. Solution B is mixed with methanol / acetone, and the resulting crystals are washed, filtered, and dried to obtain liquid crystal epoxy resin C. C is mixed with an inhibitor and reacted, then acrylic acid and catalyst 2 are added dropwise to react and obtain acrylic liquid crystal photosensitive resin D. D is mixed with 1,1',3,3'-dimethyldisiloxane, and a solvent, catalyst 3, and inhibitor are added to carry out a hydrosilylation reaction to obtain silicon-chain acrylic liquid crystal photosensitive resin E. The silicon-chain acrylic liquid crystal photosensitive resin provided by this invention can be widely used in artificial muscles, actuators, shape memory, smart devices, and some highly elastic advanced composite materials.

Provided is an insulating thermally conductive sheet which is flexible and has excellent heat conductivity in the thickness direction. The sheet is a cured product of a thermally conductive silicone resin composition including: (A) 100 parts by mass of a thermosetting silicone resin containing (A1) an organopolysiloxane having two or more silicon atom-bonded alkenyl groups in each molecule, (A2) an organohydrogenpolysiloxane having two or more hydrosilyl groups in each molecule and being composed of (A2-a) and (A2-b) having specific structures, and (A3) a hydrosilylation catalyst; and (B) 150 to 500 parts by mass of a boron nitride having particle diameter of 40 to 100 μm and an aspect ratio of 20 to 100, wherein the sheet has an orientation degree such that (Sum of the counts at [2θ=41 to 43°]) / (Sum of the counts at [2θ=25 to 27°]) is 1 or greater.

This invention relates to a pyridine-imine type metal complex, its preparation method, and its applications. The pyridine-imine type metal complex is an NNN-pyridine-imine type metal complex or an NN-pyridine-imine type metal complex; its structural formula is shown in Formulas 1-4. The pyridine-imine type metal complex and its preparation method described in this invention, as well as its application in hydrosilylation and silanization reactions, allow for the one-pot synthesis of the desired metal complex. The preparation method is simple and low-cost, eliminating the cumbersome separation steps in traditional two-step methods, significantly reducing reaction time, increasing the maximum yield to over 95%, and exhibiting high catalytic activity and selectivity in hydrosilylation and silanization reactions.

This invention provides an inorganic fiber fabric composite material coated with silicone rubber and its preparation method, belonging to the technical field of fiber fabric composite materials. The preparation method includes: mixing benzene-free vinyl polydimethylsiloxane, a silane coupling agent, and silica; then adding functional fillers and mixing again to obtain silicone rubber component A; the functional fillers include iron oxide red, mica, and a flame retardant; adding a solvent, benzene-free silicone rubber component B, and a hydrosilylation silicone rubber catalyst to silicone rubber component A and mixing to obtain the silicone rubber to be coated; coating the silicone rubber to be coated onto the surface of an inorganic fiber fabric, and then performing a heat curing treatment to obtain the silicone rubber-coated inorganic fiber fabric composite material. The silicone rubber-coated inorganic fiber fabric composite material of this invention can be used to prepare smoke curtains, and the prepared smoke curtains only produce methane and dimethylsiloxane rings at high temperatures, maintaining structural integrity for a long time.

To provide a hydrogen silane composition that enhances the reactivity of hydrogen silane compounds in hydrosilylation reactions, improves reaction selectivity and reaction rate, and mitigates disproportionation and dehydrogenation reactions. [Solution] A hydrogensilane composition comprising a mixture of a hydrogensilane compound represented by the following general formula (1) and an acid amide compound (excluding compositions comprising an organic compound having an unsaturated bond containing an average of one or more carbon-carbon double bonds or carbon-carbon triple bonds per molecule). TIFF2026110850000022.tif7140 (in the formula, R 1 Each of these independently represents a hydrogen atom, a halogen atom, or a substituted or unsubstituted monovalent hydrocarbon group having 1 to 20 carbon atoms, and R 2 Each of these independently represents a substituted or unsubstituted monovalent hydrocarbon group with 1 to 20 carbon atoms, and n is an integer between 0 and 2.