194 results about "Hydrosilylation" patented technology

The invention relates to the field of high polymer materials, and discloses a preparation method of high-temperature-resistant oil-resistant special functional silica gel, which comprises the following steps: adding a thermoplastic polyester elastomer, fluorosilicone rubber and a macromolecular compatilizer into an extruder through a main feeding port, and carrying out melt blending; adding hydrogen-containing silicone oil, a platinum catalyst and an internal closed type cross-linking agent through a side feeding port, and carrying out distributed blending; under the condition that the temperature is higher than the deblocking temperature of the cross-linking agent, initiating the internal closed cross-linking agent to perform physical thermal cracking shelling and release cross-linking sites, and guiding hydrosilylation reaction to perform dynamic vulcanization; and after vacuumizing and exhausting, extruding and pelletizing to obtain the silica gel. Through cooperation of a space-time decoupling distributed feeding process and a non-toxic thermal deblocking cross-linking agent, catalyst poisoning caused by early-stage high-temperature shear consumption and by-products is avoided, a cross-phase covalent interlocking network is constructed at a polyester and fluorine-silicon two-phase interface, permeation of a non-polar solvent is hindered, and therefore the performance of the fluorine-silicon copolymer is improved. The volume swelling ratio of the material is reduced; and the high-temperature aging resistance is improved.

A curable composition comprises: at least one aliphatic carbosilane having m Si—H groups, at least one aliphatic carbosilane having n vinyl groups, and at least one hydrosilylation reaction catalyst. m is an integer greater than or equal to 2, n is an integer greater than or equal to 2, and m+n is at least 5. A cured reaction product and an electronic article including the same are also disclosed.

The invention relates to the technical field of organic silicon catalysis, and discloses a hydrosilylation reaction catalyst and a preparation method thereof, the catalyst is prepared from a platinum complex catalyst solution, maleic anhydride, triphenyl borate, tetraethoxysilane, propylene carbonate and diethylene glycol dibutyl ether; the preparation method comprises the steps of solvent water removal, electronic relay adduct preassembly, active metal introduction, thermal induction aging and the like. An electron-deficient coordination center is constructed through a step-by-step process, the electron cloud density of the platinum center is reduced by utilizing the Lewis acid characteristic of triphenyl borate, and the solvent cage effect of propylene carbonate is matched, so that the high-temperature tolerance of the catalyst is improved, and the generation of platinum black is effectively inhibited; meanwhile, the solubilizing and bridging effects of diethylene glycol dibutyl ether are utilized, the compatibility problem of a high-polarity component and a non-polar silicone oil matrix is solved, and the obtained catalyst has high activity, high regioselectivity and excellent long-term storage stability.

A composition for printing a three-dimensional siloxane structure includes a siloxane monomer having at least one silane functional group, a chain transfer agent, a hydrosilylation catalyst, a radical initiator, and a photo-oxidizing agent.

Provided is a curing reactive organopolysiloxane composition that forms a pressure-sensitive adhesive layer having excellent curing properties, a wide range of designable viscoelastic properties such as storage elastic modulus (G′) and the like, and practically sufficient pressure-sensitive adhesive strength and tensile adhesive strength. The organopolysiloxane composition comprises: (A) an organopolysiloxane having an alkenyl group; (B) an organopolysiloxane resin with 9 mol % or less of hydroxyl groups or the like relative to all silicon atoms in a molecule or resin mixture thereof; (C) an organohydrogenpolysiloxane; (D) an organic silicon compound having an alkenyl group; and (E) a hydrosilylation reaction catalyst. A ratio (molar ratio) of the substance amount of SiH groups in component (C) relative to the sum of alkenyl groups in components (A), (B) and (D) is 1.0 or more.

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.

Provided is an adhesive composition for forming an adhesive layer between a support substrate and a semiconductor substrate or an electronic device substrate. The adhesive composition includes an adhesive component (A) that hardens by a hydrosilylation reaction, and the etching rate of the adhesive layer measured by a specific measurement method is 10 μm / min. or more.

The present invention is a composition comprising a) a compound functionalized with at least one Si-H group; b) a compound functionalized with at least one olefin group; and c) compound of Formula 1: where x, R1, R2, and R3 are as defined herein. The composition provides a pre-catalyst that decomposes quickly to a platinum state that promotes hydrosilylation upon irradiation with light of the appropriate wavelength.

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 present invention is a temporary adhesive for wafer processing, which is used for temporarily bonding a wafer to a support. This temporary adhesive for wafer processing is composed of a curable silicone resin composition which can be cured by a hydrosilylation reaction. This curable silicone resin composition is a temporary adhesive for wafer processing, which characteristically contains an organopolysiloxane that has in each molecule only one alkenyl group or only one silicon atom-bonded hydrogen atom (SiH group). It is thereby possible to provide a temporary adhesive for wafer processing, a wafer laminate, and a method for producing thin wafers using same, which support an improved productivity for thin wafers, wherein, inter alia, an adequate substrate retention is exhibited post-bonding even when a substrate with high level differences is used; a high process compatibility is exhibited with wafer backside grinding processes, TSV formation processes, and wafer backside wiring processes; facile peeling is exhibited in peeling processes even after passage post-bonding through a lengthy high-temperature heating process in air; and the residue on the substrate post-peeling exhibits an excellent cleanability.

The invention provides a preparation method of a novel chiral thiourea / phosphine bifunctional organic catalyst with a cis-cyclic 1, 2-phosphinamine skeleton and application of the novel chiral thiourea / phosphine bifunctional organic catalyst in an asymmetric catalytic reaction. The chiral organic catalyst is prepared by taking cis chiral 2-(diphenylphosphine)-1, 2, 3, 4-tetrahydro-1-naphthylamine and an isothiocyanate compound as raw materials through a one-step reaction under a mild condition. The chiral thiourea / phosphine bifunctional organic catalyst is simple to prepare and stable in property, and shows excellent catalytic activity and stereoselectivity in an asymmetric hydrosilylation reaction of o-amido benzophenone.

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 invention discloses an organic silicon cooling liquid for immersed liquid cooling and a preparation method and application thereof.The organic silicon cooling liquid is prepared from raw materials including 1, 1, 3, 3-tetramethyldisiloxane, long-chain alpha olefin, a phenyl siloxane ring body, a methyl siloxane ring body and the like through hydrosilylation and ring-opening chain extension polymerization reaction under the action of a catalyst to precisely regulate and control a molecular structure, and the organic silicon cooling liquid is prepared. And the long-chain alkyl-terminated polysiloxane with phenyl on the side chain is prepared. The prepared polysiloxane product has the advantages of being low in viscosity, high in flash point, low in pour point, high in heat conductivity coefficient and the like when being used as cooling liquid, and compared with fluorine-containing series cooling liquid which is used at present, the cost is reduced by 80% or above, so that the polysiloxane product has wide prospects in immersed cooling application in the fields of data centers, charging piles, new energy batteries and the like.

The application discloses a bone-integrative degradable silica gel support for treating bone nonunion and a preparation method thereof, and relates to the technical field of medical implant materials.The preparation method comprises the following steps: hydrogen-containing silicone oil and allyl glycidyl ether are subjected to a hydrosilylation reaction under the action of a platinum catalyst to generate silicone oil containing an epoxy group, then the epoxy group is subjected to ring-opening under the action of a catalyst to obtain silicone oil containing a phosphate group in a side chain; carboxyl-terminated polylactic acid-glycolic acid copolymer is mixed with the silicone oil containing the phosphate group in the side chain, and a condensation reaction is carried out under the action of a condensing agent and a catalyst to obtain a PLGA-P-PDMS-PLGA triblock copolymer; the triblock copolymer, a reactive diluent, a photoinitiator and inorganic reinforcing fillers are mixed to obtain 3D printing slurry; and the printing slurry is printed into a designed bone-integrative support according to set printing parameters by using a light-curing 3D printing technology.The application endows the material with intrinsic osteogenic activity, and realizes the unification of bioactivity, shape memory function and mechanical support.

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.

Provided is a curable organopolysiloxane composition that yields an organopolysiloxane cured product having viscoelastic properties (particularly, reversion characteristics after deformation due to external stress) that are particularly suitable for use as a dielectric layer or a transducer, and a method of use thereof. A curable organopolysiloxane composition for transducers, contains: (a) a chain organopolysiloxane or mixture thereof having a weight-average molecular weight (Mw(a)) of less than 8.0×104; (b1) a crosslinking agent; (b2) a chain length extender; and (c) a hydrosilylation reaction catalyst. The molar quantity of Si—H (Hb1, Hb2) in component (b1) and component (b2) and the molar quantity of curable reactive groups (Vi) in component (a), satisfy the following relationship: px1={Hb1 / Hb2} / {(Hb1+Hb2) / Vi}; where the value obtained by dividing Mw(a) by the value of px1, i.e., Mw(a) / px1, is in a range of 1,000 to 8,000.

Embodiments are directed to a process comprising: mixing particles of olefin-SiH polymer with structure (I) (I) where h ≥ 0, i ≥ 0, and j > 0, with a monovinyl graft component having a formula of H2C=CH2-X in a solvent in the presence of a hydrosilylation catalyst to graft the monovinyl graft component to the olefin-SiH polymer particles to thereby form functionalized particles with structure (II) where h ≥ 0, i ≥ 0, m ≥ 0, and l > 0, wherein the solvent comprises one or more of an organosilicon, or an alicyclic hydrocarbon optionally substituted with one or more pendant O heteroatoms; X and Y are selected from a C4-C20 hydrocarbyl group, or a C4-C20 heterohydrocarbyl group with one or more heteroatoms selected from the group consisting of O, N, and Si; and R and R'' are independently selected from H, C1-C12 alkyl, and R' is a C1-C12 alkenyl.

This adhesive composition is for forming an adhesive layer provided between a support substrate and a semiconductor substrate having bumps, the adhesive composition containing an adhesive component (A) that is cured by a hydrosilylation reaction, the Young's modulus of the adhesive layer as measured by dynamic viscoelasticity measurement being 5 MPa or more.

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.

The encapsulation catalyst for hydrosilylation comprises platinum(O) and / or platinum(II). The polymer encapsulates the platinum(O) and / or platinum(II). The polymer comprises structural units, at least a portion of which comprises pyridine moieties, and at least a portion of the platinum(O) and / or platinum(II) is bonded to at least a portion of the pyridine moieties of the polymer. When the platinum in the encapsulation catalyst is platinum(0), the encapsulation catalyst contains at least 500 equivalents of pyridine moieties relative to the total platinum. Methods for preparing the encapsulation catalyst and compositions containing the same are also disclosed.

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.

The invention relates to a preparation method of platinum-supported porous carbon, which comprises the following steps: (1) thermoplastic phenolic resin, polycarbazole phosphoric acid and a catalyst are mixed and heated to react to obtain modified phenolic resin, and the mass ratio of the thermoplastic phenolic resin to the polycarbazole phosphoric acid is 100: (6-10); (2) jointly dissolving the modified phenolic resin, a curing agent and a pore-foaming agent in a solvent, removing the solvent, and crushing to obtain solid particles; the solid particles are subjected to thermocuring, pre-oxidation, carbonization, activation and chambering in sequence, and porous carbon is obtained; (3) performing oxidation treatment on the porous carbon, and modifying the porous carbon with an alkenyl silane coupling agent to obtain alkenyl silane coupling agent modified porous carbon; and (4) impregnating the porous carbon modified by the alkenyl silane coupling agent in an alcoholic solution of platinum salt to obtain the platinum-loaded porous carbon. The platinum-supported porous carbon prepared by the invention has excellent catalytic efficiency and good stability when being used for catalyzing a high-temperature hydrosilylation reaction.

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.

A temporary adhesive having excellent spin coating properties of a circuit side of a wafer and a support, and excellent heat resistance when the circuit side of the wafer or the support is attached to an adhesion layer or a rear surface of the wafer is processed, and is capable of easily separating the circuit side of the wafer from the support after polishing the rear surface of the wafer, and simply removing a adhesive attached to the wafer or the support after the separation. The adhesive contains a component (A) to be cured by a hydrosilylation reaction, and a component (B) containing an epoxy-modified polyorganosiloxane at a ratio in % by mass of the component (A) to the component (B) of 99.995:0.005 to 30:70. The component (B) is an epoxy-modified polyorganosiloxane having an epoxy value of 0.1 to 5.

A polyorganosiloxane emulsion has a discontinuous phase dispersed in a continuous phase, wherein the discontinuous phase includes a hydrosilylation reaction curable polyorganosiloxane composition, and the continuous phase comprises water. The emulsion is useful for forming a coated article in which a substrate has a polyorganosiloxane release coating on its surface. The coated article is useful for food contact applications.

The invention relates to the field of hydrosilylation, in particular to a high-efficiency catalyst for hydrosilylation and a preparation method thereof, and provides a preparation method of a microcapsule type catalyst, methyl-terminated hydroxyl silicone oil is modified by silazane, and then a microcapsule coating system is formed by the modified methyl-terminated hydroxyl silicone oil and paraffin. The release performance of a microcapsule coating system is improved, so that the catalyst has relatively low reaction activity at the initial release stage, the uniformity of the reaction process in the silicone rubber is improved, and the transparency and the overall strength of the silicone rubber are further improved.