Abstract: A thermally conductive silicone gel composition of the present invention includes the following A to F: (A) an organopolysiloxane having two alkenyl groups per molecule; (B) an organohydrogenpolysiloxane having two Si—H groups per molecule; (C) an organohydrogenpolysiloxane having three or more Si—H groups per molecule; (D) at least one compound selected from the group consisting of D1 and D2: (D1) an organopolysiloxane having one alkenyl group per molecule and (D2) an organohydrogenpolysiloxane having one Si—H group per molecule; (E) a platinum catalyst; and (F) a thermally conductive filler in an amount of 100 to 600 vol % with respect to 100 vol % of the total amount of the A to E. The components A to F are cured. With this configuration, the thermally conductive silicone gel composition can reduce oil bleeding, even though the composition is a gel cured product.

Abstract: Disclosed is a preparation method for a polysiloxane powder filler. The method comprises: providing polysiloxane which contains at least 60 wt % of T unit, wherein T unit is equal to R1SiO3-, R1 is a hydrogen atom or an independently selected organic group comprising 1-18 carbon atoms; and performing heat treatment on the polysiloxane under inert gas atmosphere or vacuum conditions, wherein the heat treatment temperature is 250 to 750 degrees, such that silicon hydroxyl groups in the polysiloxane are condensed to obtain a polysiloxane powder filler having a true density greater than or equal to 1.33 g/cm3 and more preferably greater than or equal to 1.34 g/cm3. The polysiloxane powder filler obtained by the described preparation method has low inductivity, low inductivity loss and low radioactivity; and can be used for semiconductor packaging materials, circuit boards and intermediate semi-finished products thereof, and semi-cured sheets or copper clad laminates of high-frequency high-speed circuit boards.

Abstract: A silicone pressure sensitive adhesive composition contains an alkenyl-functional polydiorganosiloxane gum, a polyorganosilicate resin, a polyorganohydrogensiloxane crosslinker, a migration reducing additive, a hydrosilylation reaction catalyst, a hydrosilylation reaction inhibitor, and a solvent. Methods for preparing the silicone pressure sensitive adhesive composition and using it to form a protective film are provided.

Abstract: An addition-curable liquid silicone rubber composition for LED headlamps, which contains: (A) (A-1) an alkenyl group-containing liquid organopolysiloxane, and (A-2) an alkenyl group-containing raw rubber-state organopolysiloxane; (B) a silicone resin which contains an alkenyl group, while being composed of a unit that is selected from among an R23SiO1/2 unit (M unit), an SiO4/2 unit (Q unit), an R22SiO2/2 unit (D unit) and R2SiO3/2 unit (T unit); (C) an organohydrogen polysiloxane; (D) a platinum group metal catalyst; and (E) triallyl isocyanurate.

Abstract: A curable water-swelling water stop material including: 100 parts by mass of a resin component which includes 40 to 100 parts by mass of a curable resin having a hydrolysable alkoxysilyl group and 0 to 60 parts by mass of a polyether polyol; 0.3 to 25 parts by mass of an aminosilane coupling agent; 20 to 250 parts by mass of a water-absorbent resin; and 0 to 160 parts by mass of an extender pigment, in which the hydrolysable alkoxysilyl group having a structure represented by Formula (1) —X—CH2—SiR1Y(OR2)3-Y, in which X is a bonding functional group having a heteroatom with an unshared electron pair and bonding to a methylene group bonding to a silicon atom of a hydrolysable silicon group, R1 and R2 are C1-C3 alkyl groups respectively, and Y is 0, 1 or 2.

Abstract: A composition comprising (a) a cationically polymerisable epoxy resin, (b) an initiator for the cationic polymerisation, (c) a microparticle filler, and (d) a nanoparticle filler can be used for the production of thermally stable insulating material for electrical and electronic components.

Abstract: A silicone pressure sensitive adhesive composition contains an alkenyl-functional polydiorganosiloxane gum, a polyorganosilicate resin, a polyorganohydrogensiloxane crosslinker, a migration reducing additive, a hydrosilylation reaction catalyst, a hydrosilylation reaction inhibitor, and a solvent. Methods for preparing the silicone pressure sensitive adhesive composition and using it to form a protective film are provided.

Abstract: Segmented silicone polymers incorporating segments formed from medium-chain fatty acids are generally disclosed herein. Methods of using such compounds, for example, as surfactants, are also disclosed herein, as well as methods of making such compounds, for example, from medium-chain fatty acids derived from natural oils.

Abstract: A polyfunctional organohydrogensiloxane is prepared using a boron containing Lewis acid as catalyst. The polyfunctional organohydrogensiloxane may be formulated into release coating compositions. Alternatively, the polyfunctional organohydrogensiloxane may be further functionalized with a curable group to form a clustered functional organosiloxane. The clustered functional organosiloxane may be formulated into thermal radical cure adhesive compositions.

Abstract: A preceramic resin formulation comprising a polycarbosilane preceramic polymer, an organically modified silicon dioxide preceramic polymer, and, optionally, at least one filler. The preceramic resin formulation is formulated to exhibit a viscosity of from about 1,000 cP at about 25° C. to about 5,000 cP at a temperature of about 25° C. The at least one filler comprises first particles having an average mean diameter of less than about 1.0 ?m and second particles having an average mean diameter of from about 1.5 ?m to about 5 ?m. Impregnated fibers comprising the preceramic resin formulation are also disclosed, as is a composite material comprising a reaction product of the polycarbosilane preceramic polymer, organically modified silicon dioxide preceramic polymer, and the at least one filler. Methods of forming a ceramic matrix composite are also disclosed.

Abstract: A method for forming a fiber is provided. The method comprises extruding a matrix polymer and a nanoinclusion additive to form a thermoplastic composition in which the nanoinclusion additive is dispersed within a continuous phase of the matrix polymer. The extruded thermoplastic composition is thereafter passed through a spinneret to form a fiber having a porous network containing a plurality of nanopores, wherein the average percent volume occupied by the nanopores within a given unit volume of the fiber is from about 3% to about 15% per cm3.

Abstract: A one-pack type curable silicone gel composition which contains: 100 parts by mass of (A) a branched chain organopolysiloxane having a specific structure from 0.1 part by mass to 50 parts by mass of (B) a diorganopolysiloxane having both molecular chain ends blocked with diorganohydrogensiloxy groups; (C) a platinum-based catalyst; and (D) a phosphite compound represented by formula (3) (wherein R2 represents a monovalent aliphatic hydrocarbon group having 1 to 10 carbon atoms; and X represents a hydrogen atom or a methyl group) in such an amount that more than 3 molecules hut not more than 15 molecules of the phosphite compound represented by formula (3) are present per one platinum atom in component (C). This one-pack type curable silicone gel composition is stable in terms of characteristics and physical properties even if exposed to a temperature more than 50° C. for a long period of time.

Abstract: A composition contains an organopolysiloxane having the average chemical structure (I): [R?R2SiO—(R2SiO)m]3—Si—[OSiR2]n—Y—Si(OR)3??(I) where: R is independently in each occurrence selected from alkyl, aryl, substituted alkyl and substituted alkyl groups having from one to 8 carbon atoms; R? is independently in each occurrence selected from R and terminally unsaturated alkylene groups having from 2 to 6 carbon atoms; Y is selected from a group consisting of: X, and X—(R2SiO)pSiR2—X; where p has an average value in a range of one to 3; and X is independently in each occurrence selected from alkylene and substituted alkylene groups having from one to 6 carbon atoms; and the average values for subscripts m and n are each greater than zero and independently selected so that the average value for the sum of all of the average m values and the average n value is in a range of 30-200.

Abstract: Provided is a hydrosilylation reactive composition and a method for producing a semi-cured product and a cured product using the hydrosilylation reactive composition, which exhibit sharp curability during the reaction while maintaining pot life and can provide a molecular design through the reaction control of the MH unit/DH unit. The composition comprises: (A) a compound containing at least one monovalent hydrocarbon group having an aliphatic unsaturated bond per molecule; (B) a compound containing at least two hydrogen atoms bonded to silicon atoms per molecule; (C) a first hydrosilylation catalyst; and (D) a second hydrosilylation catalyst which microencapsulates component (C) with a thermoplastic resin having a softening point within the temperature range of 50 to 200° C. and exhibits activity at temperatures higher than that of component (C). Also provided is a method for carrying out a hydrosilylation reaction at temperatures of two stages using the composition.

Abstract: Provided are a polyorganosiloxane high in elasticity, high in strength and the like. The polyorganosiloxane is a polyorganosiloxane including an M unit (R1R2R3SiO1/2) at a content of 10% by mol or more relative to the total of silicon and a T unit (R6SiO3/2) at a content of 80% by mol or less relative to the total of silicon, the polyorganosiloxane having an alkoxy group bound and a reactive functional group bound to silicon, wherein the polyorganosiloxane has the alkoxy group bound at a content of 0.07 to 4% by weight based on the total weight of the polyorganosiloxane and has 3 to 12 of the reactive functional groups bound on a number basis per a molecular weight of 1000 of the polyorganosiloxane, and the weight loss of the polyorganosiloxane in heating at 110° C. under a reduced pressure of 0.15 torr for 2 hours is 5% by weight or less.

Abstract: Provided is a silicone composition that has high thermal conductivity and favorable adhesion. A silicone composition that contains (A) 50-99.9 parts by mass of an organopolysiloxane that has at least two aliphatic unsaturated hydrocarbon groups per molecule thereof and has a kinematic viscosity of 60-100,000 mm2/s at 25° C., (B) 0.1-50 parts by mass of a silicone resin that has at least one aliphatic unsaturated hydrocarbon group per molecule thereof (provided that the total of components (A) and (B) is 100 parts by mass), (C) an organohydrogen polysiloxane, (D) 0.01-10.0 parts by mass of an organic peroxide that has a ten-hour half-life temperature of at least 40° C. per 100 total parts by mass of components (A) and (B), and (E) 100-3,000 parts by mass of a thermally conductive filler that has a thermal conductivity of at least 10 W/(m·° C.) per 100 total parts by mass of components (A) and (B).

Abstract: To provide a method for producing lanthanum hexaboride-containing composite particles which are capable of forming a formed product having sufficiently high transparency and which are excellent in weather resistance, by a simple operation without calcination treatment at high temperature, and a method for producing a formed product using it. Also provided is a method for producing composite particles, which involves: reacting at least one silica precursor selected from a tetraalkoxysilane, its hydrolysate and its condensate, in the presence of lanthanum hexaboride particles, a volatile base, water and an organic solvent to obtain a first reaction mixture, and reacting the first reaction mixture with at least one silicon compound selected from an amino-modified silicone, an alkylsilane and an aminosilane, or the silicon compound and the silica precursor added, to obtain a second reaction mixture containing lanthanum hexaboride-containing composite particles.

Abstract: A silsesquioxane resin, photoresist composition comprising the silsesquioxane resin and a photoacid generator, etching mask composition comprising the silsesquioxane resin, products prepared therefrom, methods of making and using same, and manufactured articles and semiconductor devices containing same. The silsesquioxane resin comprises silicon-bonded hydrogen atom T-units and T-units having a silicon-bonded group of formula —CH2CH2CH2CO2C(R1a)3 or —CH(CH3)CH2CO2C(R1a)3, wherein each R1a is independently an unsubstituted (C1-C2)alkyl.

Abstract: A two-part curable liquid silicone rubber composition is provided in which the first liquid composition and the second liquid composition yield, upon mixing, a curable liquid silicone rubber composition which, when cured, yields a silicone elastomer having an elongation-at-break value of at least 800%. The silicone elastomers of the invention comprise at least one alkenyl group-containing organopolysiloxane having two silicon-bonded alkenyl groups per molecule, at least one diorganohydrogensiloxy-terminated polydiorganosiloxane, at least one organosilicon crosslinker containing at least 3 silicon-bonded hydrogen atoms per molecule, at least one addition reaction catalyst, and at least one filler. Also provided are silicone elastomers having an elongation-at-break value of at least 800% and withstand elongation without breaking. An article for a medical device comprising a cured product of the two-part curable liquid silicone rubber compositions or the silicone elastomers of the invention are also provided.

Abstract: An adhesive for separatably attaching a support to a circuit side of a wafer to process a rear surface of the wafer, the adhesive including a component (A) that is cured by a hydrosilylation reaction and a component (B) containing a phenyl group-containing polyorganosiloxane, wherein a ratio in % by mass of the component (A) to the component (B) is 95:5 to 30:70. A separation method including applying the adhesive onto a first body to form an adhesion layer, attaching a second body to the adhesion layer, heating the adhesion layer from a side of the first body to cure the adhesive to form a layered body, processing the layered body, and carrying out separation between the adhesion layer, and the first and second bodies. The processing may be polishing the rear surface of the wafer.

Abstract: A method of preparing a composition for forming a release coating is disclosed. The method comprises preparing a reaction product comprising a polyorganohydrogensiloxane compound having cyclic SiH-functional branching groups interconnected by linear polydiorganosiloxane segments (the “branched cyclic polyorganohydrogensiloxane compound”), by combining together (A) a hydroxyl terminated polydiorganosiloxane and (B) a cyclic polyorganohydrogensiloxane, in the presence of (C) a boron containing Lewis acid and a solvent. A release coating composition including the reaction product comprising the branched cyclic polyorganohydrogensiloxane is also disclosed. The reaction product may be combined with or prepared in the presence of a polyorganohydrogensiloxane diluent and stripped of solvent to prepare the composition as a blend of the branched cyclic polyorganohydrogensiloxane and the polyorganohydrogensiloxane diluent for use in solventless-curable compositions.

Abstract: A cobalt-rich wear resistant and corrosion resistant alloy useful for parts of a combustion engine such as valve seat inserts includes, in weight % about 0.1 to about 0.8% C, about 0.1 to about 1.5% Mn, about 3 to about 5% Si, about 10 to about 20% Cr, about 5 to about 32% Fe, about 0.5 to about 4% W, about 10 to about 30% Mo, up to about 20% Ni, about 20 to about 40% Co, up to about 6% V, up to about 3% Nb, total V plus Nb of about 0.5 to about 8.5% and balance unavoidable impurities including up to 0.035% P, up to 0.015% S and up to 0.250% N.

Abstract: A method and a fugitive mold for producing a cast-metal part are provided. In some embodiments, the fugitive mold may be formed by three-dimensionally (3D) printing a preceramic resin in the shape of a fugitive mold; curing the preceramic resin to form a preceramic polymer, and pyrolyzing the fugitive mold to convert the preceramic polymer to a metastable ceramic material. The metastable ceramic material may include an amorphous silicon oxycarbide ceramic. A cast-metal part may be formed by filling the fugitive mold with a liquid metal or alloy, and allowing the liquid metal or alloy to solidify over a first length of time. The cast-metal part may then be retrieved by heating the fugitive mold at a temperature lower than the melting point of the cast-metal part for a second length of time longer than the first length of time to disintegrate the metastable ceramic material.

Abstract: A silsesquioxane polymer, composition, method, and article including such polymer, wherein the polymer includes a three-dimensional network of Formula (I): wherein: each R1 and R2 is independently a (C1-C4)alkyl; each L1 and L2 is independently in a single bond, an alkylene, or an alkylene bonded to a group selected from oxy, thio, carbonyl, —NH—, and combinations thereof; each R3 is independently a linear (C14-C100)alkyl; each R4 is independently a (C1-C30)alkyl, (C2-C30)heteroalkyl having at least one oxygen, sulfur, or —NH— group, or a (C1-C30)alkyl substituted with a fluoro, thiol, isocyanato, cyanato, hydroxyl, glycidoxy, or epoxy group; with the proviso that L1, L2, and R4 are selected such that each Si atom is directly bonded to an alkylene or an alkyl; m is an integer of at least 3; n is an integer of 0 or above; m+n is an integer of at least 3; each oxygen atom at an asterisk (*) is bonded to another Si atom within the three-dimensional network; and the silsesquioxane polymer is a solid at 25° C.

Abstract: A composition for solar cell electrodes, an electrode formed of the same, and a method of forming an electrode, the composition including a conductive powder; a glass frit; at least one of a cyclosiloxane compound and a silsesquioxane compound; and an organic vehicle.

Abstract: Provided is a release agent composition for silicone adhesives in which organopolysiloxane having a specific structure is added, as a heavy release component, to a release agent composition for silicone adhesives that includes organopolysiloxane modified with a fluorine-containing organic group.

Abstract: Disclosed is a vinylbenzyl imide resin useful in conjunction with other components to prepare a resin composition for making such as a prepreg, a resin film, a resin film with copper foil, a laminate or a printed circuit board, having improved one or more properties including resin flow, resin filling property, flame retardancy, glass transition temperature, thermal resistance, dielectric constant, dissipation factor and interlayer bonding strength. Also disclosed is a method of preparing the vinylbenzyl imide resin, its prepolymer, a resin composition comprising the vinylbenzyl imide resin and/or its polymer and an article made therefrom.

Abstract: The present invention relates to flame-retardant moulding compositions comprising siloxane-containing polycarbonate block cocondensate, and also to a process for the production of these moulding compositions. The invention further relates to the use of these flame-retardant moulding compositions in injection-moulding and extrusion applications.

Abstract: Provided is a silicone-based coating composition including: a silicone-based resin; a silicone-based hardener; and a thermal initiator, in which the silicone-based coating composition further includes a silicone-based compound of Chemical Formula 1. Also, provided is a silicone-based release film including: a base layer; and a coating layer which is a cured product of the silicone-based coating composition.

Abstract: A method produces a polysilane by reacting at least two silane monomers and at least one alkali metal. The silane monomers have the following structural units: at least one aryl group, at least one alkyl group, at least one alkenyl group, and at least three halogen atoms. Wherein at least three of the halogen atoms are bonded to a silicon atom of one of the silane monomers, and the reaction step takes place in an ether-containing solvent, particularly preferably dioxane. The obtained polysilane has a high molecular mass and, at 100° C., a viscosity of 1,500 to 3,000 Pa·s. The polysilane is very suitable for being processed to form silicon carbide fibers and fiber composites.

Abstract: The present invention relates to a curable silicone composition comprising: (A) an organopolysiloxane represented by the average unit formula: (R13SiO1/2)a(R12SiO2/2)b (R2SiO3/2)c (R3SiO3/2)d, wherein, R1 are the same or different alkyl groups having from 1 to 12 carbons, alkenyl groups having from 2 to 12 carbons, aryl groups having from 6 to 20 carbons, or aralkyl groups having from 7 to 20 carbons, provided that at least two R1 in a molecule are the alkenyl groups; R2 is an aryl group having from 6 to 20 carbons or an aralkyl group having from 7 to 20 carbons; R3 is an alkyl group having from 1 to 12 carbons; and a, b, c, and d are respectively numbers satisfying: 0.01?a?0.5, 0?b?0.7, 0.01?c<0.7, 0.1?d<0.9, and a+b+c+d=1; (B) a linear organopolysiloxane having at least two silicon-bonded alkenyl groups and at least one silicon-bonded aryl group in a molecule; (C) an organopolysiloxane having at least two silicon-bonded hydrogen atoms in a molecule; (D) a hydrosilylation-reaction catalyst.

Abstract: Additive manufacturing methods for fabricating a fiber-reinforced composite objects include providing at least a first layer of powder material, disposing a fiber material adjacent the at least first layer of powder material to form a fiber reinforcement layer, and applying a laser energy to the at least first layer of powder material so as to fuse the powder material into at least a first laser fused material layer adjacent the fiber reinforcement layer of the fiber-reinforced composite object.

Abstract: A curable organo polysiloxane composition, an encapsulant, and an electronic device, the composition including at least one compound represented by the following Chemical Formula 1 and having a number average molecular weight of less than about 4,000, at least one first siloxane compound including a silicon-bonded hydrogen; and at least one second siloxane compound including a silicon-bonded alkenyl group:

Abstract: Alkoxyaminosilane compound having formula I, and processes and compositions for depositing a silicon-containing film, are described herein: (R1R2)NSiR3OR4OR5 ??Formula (I) wherein R1 is independently selected from a linear or branched C1 to C10 alkyl group; a C2 to C12 alkenyl group; a C2 to C12 alkynyl group; a C4 to C10 cyclic alkyl group; and a C6 to C10 aryl group; R2 and R3 are each independently selected from hydrogen; a linear or branched C1 to C10 alkyl group; a C3 to C12 alkenyl group, a C3 to C12 alkynyl group, a C4 to C10 cyclic alkyl group, and a C6 to C10 aryl group; and R4 and R5 are each independently selected from a linear or branched C1 to C10 alkyl group; a C2 to C12 alkenyl group; a C2 to C12 alkynyl group; a C4 to C10 cyclic alkyl group; and a C6 to C10 aryl group.

Abstract: This invention concerns copolymers that may be used for incorporation into electrolytic membranes for lithium generators, comprising at least one vinyl ether repetitive unit comprising a pendant cyclic carbonate group.

Abstract: Provided is a curable resin composition capable of forming a cured product that has excellent heat resistance and transparency and, in particular, offers excellent barrier properties to a corrosive gas. The curable resin composition according to the present invention includes a polyorganosiloxane (A), an isocyanurate compound (B), and a silane coupling agent (C). The polyorganosiloxane (A) is an aryl-containing polyorganosiloxane. The polyorganosiloxane (A) preferably includes a polyorganosiloxane having a number-average molecular weight (Mn) of 500 to 4000 as determined by gel permeation chromatography and calibrated with a polystyrene standard.

Abstract: A hydrosilylation process is used to prepare a polyorganosiloxane having clustered functional groups at the polyorganosiloxane chain terminals. The ingredients used in the process include a) a polyorganosiloxane having an average of at least 2 aliphatically unsaturated organic groups per molecule, b) a polyorganohydrogensiloxane having an average of 4 to 15 silicon atoms per molecule and at least 4 silicon bonded hydrogen atoms for each aliphatically unsaturated organic group in ingredient a), c) a reactive species having, per molecule at least 1 aliphatically unsaturated organic group and 1 or more curable groups; and d) a hydrosilylation catalyst. The resulting clustered functional polyorganosiloxane is useful in a curable silicone composition for electronics applications.

Abstract: An optoelectronic component is specified. According to at least one embodiment of the invention, the optoelectronic component comprises a housing (20) and a radiation-emitting or radiation-receiving semiconductor chip (10) arranged in the housing (20). Furthermore, the component comprises an optical element (50), which contains a polymer material comprising a silicone. The silicone contains at least 40% by weight of cyclic siloxanes, and at least 40% of the silicon atoms of the cyclic siloxanes are crosslinked with a further silicon atom of the silicon via alkylene and/or alkylarylene groups.

Abstract: Provided is a curable resin composition capable of forming a cured product that has excellent heat resistance and transparency and, in particular, offers excellent barrier properties to a corrosive gas. The curable resin composition according to the present invention includes a polyorganosiloxane (A), an isocyanurate compound (B), and a silane coupling agent (C). The polyorganosiloxane (A) is an aryl-containing polyorganosiloxane. The polyorganosiloxane (A) preferably includes a polyorganosiloxane having a number-average molecular weight (Mn) of 500 to 4000 as determined by gel permeation chromatography and calibrated with a polystyrene standard.

Abstract: The present invention provides processes for preparing carbon-containing hydridosilanes, in which an optionally boron- or phosphorus-doped hydridosilane is reacted without catalyst and reducing agent with at least one carbon source selected from linear, branched or cyclic carbosilanes, halogenated hydrocarbons, carbenes, alkyl azides, diazomethane, dimethyl sulphate or alcohols, the carbon-containing hydridosilane oligomers obtainable by the process and the use thereof.

Abstract: The present invention has its object to provide a liquid-form modified product of polyhedral polysiloxane which is excellent in moldability and transparency, and a composition produced using the modified product. In addition, the present invention can provide an easy-to-handle modified product and composition. The present invention provides a modified product of polyhedral polysiloxane which is obtainable by modifying a polyhedral polysiloxane compound (a) with a compound (b), and a composition containing the modified product. The polyhedral polysiloxane compound (a) has an alkenyl group and/or a hydrosilyl group, and the compound (b) has a hydrosilyl group and/or an alkenyl group each capable of hydrosilylation with the component (a).

Abstract: Disclosed herein are polysiloxane compositions that include a first polysiloxane and a second polysiloxane. The first and second polysiloxanes may be immiscible, and may exhibit differing refractive indices. The polysiloxane compositions may further include a curing agent and a catalyst. In some embodiments, the polysiloxane compositions significantly reflect light in at least the ultraviolet region of the electromagnetic spectrum. Reflectors and light emitting diode sources including the polysiloxane compositions are also disclosed.

Abstract: The present invention is a method for producing a polysiloxane represented by formula (1), which includes a condensation step wherein a hydrolysis/polycondenzation of a starting material monomer that forms a constituent unit is carried out in a reaction solvent that contains at least one alcohol that is selected from among secondary alcohols having 4-6 carbon atoms and tertiary alcohols having 4-6 carbon atoms. The method for producing a polysiloxane of the present invention suppresses problems such as gelation that occurs during the production, and increase in the molecular weight or gelation that occurs during storage after the production or the like.

Abstract: Method for flow coating a polymeric material, wherein at least a. one component (1) is inserted at an angle of 25° to 90° relative to the floor (5) into a holder (2), b. the component (1) is coated from an upper edge (1a) with a varnish (3) and the varnish (3) is, in the meantime or thereafter, impinged on within a region of 30% of the surface of the component (1) adjacent the upper edge (1a) by a stream of air (4).

Abstract: The invention relates to a silicone composition comprising components bearing ?SiH/?SiOH groups, which can be polymerized/cross-linked by means of a dehydrogenative condensation reaction in the presence of a carbene-type catalyst in solution.

Abstract: Si(OEt)2[CH2—Si(OEt)3]2 compounds are synthesized by reacting a Grignard reagent having the formula Si(OEt)3(CH2MgCl) with a quenching agent having the formula Si(OEt)2Cl2.

Abstract: The present invention provides a polycarbosilane represented by the following formula (1): [R1R2R3SiX1/2]M[R4R5SiX2/2]D[R6SiX3/2]T[SiX4/2]Q??(1); and a curable composition comprising: (A) said polycarbosilane of formula 1 as polycarbosilane A, (B) at least one polycarbosilane B represented by the following formula (2): [R7R8R9SiX1/2]M?[R10R11SiX2/2]D?[R12SiX3/2]T?[SiX4/2]Q?,??(2), and (C) at least a catalyst.

Abstract: Provided are a curable composition and its use. The curable composition having excellent processability, workability, heat resistance, and light resistance, and having no problem of discoloring despite using for a long time may be provided. The curable composition which may scatter light and disperse linearity of light when used as an encapsulant of an optical semiconductor such as an LED may be provided.

Abstract: The present invention has its object to provide a liquid-form modified product of polyhedral polysiloxane which is excellent in moldability and transparency, and a composition produced using the modified product. In addition, the present invention can provide an easy-to-handle modified product and composition. The present invention provides a modified product of polyhedral polysiloxane which is obtainable by modifying a polyhedral polysiloxane compound (a) with a compound (b), and a composition containing the modified product. The polyhedral polysiloxane compound (a) has an alkenyl group and/or a hydrosilyl group, and the compound (b) has a hydrosilyl group and/or an alkenyl group each capable of hydrosilylation with the component (a).

Abstract: A curable composition comprises (a) at least one polyorganosiloxane, fluorinated polyorganosiloxane, or combination thereof comprising reactive silane functionality comprising at least two hydroxysilyl moieties; (b) at least one polyorganosiloxane, fluorinated polyorganosiloxane, or combination thereof comprising reactive silane functionality comprising at least two hydrosilyl moieties; and (c) at least one photoactivatable composition comprising at least one organoborate salt selected from tetraarylborate, triarylorganoborate, diaryldiorganoborate, and aryltriorganoborate salts (and combinations thereof) of at least one base selected from amidines, guanidines, phosphazenes, proazaphosphatranes, and combinations thereof; wherein at least one of the components (a) and (b) has an average reactive silane functionality of at least three.