Abstract: Organosilicon compounds having organooxysilyl groups at ends and a polysulfide group at an intermediate of the molecule, which are linked through a divalent hydrocarbon group containing a monosulfide or polysulfide group are novel. These organosilicon compounds are effective as a rubber compounding agent.

Abstract: An aqueous coating composition including (A) an amino group-containing organopolysiloxane, (B) water and (C) at least one of a surface-active agent represented by the general formula (I): wherein R1 to R4are a C1-C8 alkyl group, R5 and R6 are a C1-C6 alkylene group, R7 and R8 are selected from a hydrogen atom, a C1-C6 alkyl group and a C2-C6 acyl group, and m and n are an integer of 0 to 40, provided that m and n are not 0 at the same time and that of m+n ranges from 1 to 40 on the average; and a nonionic surface-active agent containing a perfluoroalkyl group and an alkylene oxide group. In the composition, (C) is present in a content of 0.01% to 5% by weight based on the total of (A), (B) and (C), and an alcohol is present in an amount not more than 10% by weight of the composition. The aqueous coating composition has superior uniform-coating properties and storage stability.

Abstract: A flame retardant resin composition is provided comprising (A) 100 pbw of a resin comprising 10-100% by weight of an aromatic polycarbonate resin and 90-0% by weight of another thermoplastic resin, (B) 0.1-9.9 pbw of an organopolysiloxane containing silicon atom-bonded phenyl groups, and (C) 0.1-9.9 pbw of an organopolysiloxane containing silicon atom-bonded methyl groups and Si—H groups and free of an aromatic hydrocarbon group. The composition has satisfactory flame retardant effects and safety and minimal environmental load features, and molded articles can be effectively produced therefrom.

Abstract: A photo-curable coating composition comprising (A) 100 parts by weight of a silicone compound having at least three epoxycyclohexyl-bearing organic groups each directly attached to a silicon atom, but free of alkoxy groups, and having a molecular weight of 500-2,100 and an epoxycyclohexyl-bearing organic group equivalent of 180-230, (B) 0.1-5 parts by weight of a photoacid generator, and optionally, (C) 30-400 parts by weight of inorganic oxide particles having an average particle size of 1-500 nm or (D) 1-400 parts by weight of a curable resin which is shrinkable upon curing forms a hard protective coat.

Abstract: By premixing a sulfide chain-bearing organosilicon compound, a halogenoalkyl group-bearing organosilicon compound, and optionally, sulfur, adding anhydrous sodium sulfide Na2S to the premix, and allowing reaction to take place, a sulfide chain-bearing organosilicon compound having a shorter sulfide chain can be prepared in high yields and at a lost cost while minimizing formation of monosulfide-bearing organosilicon compound.

Abstract: A flame retardant aromatic polycarbonate resin composition comprising:

Abstract: A polyorganosiloxane compound obtained by allowing a polyorganosiloxane having silicone resin structure to react with a polyorganosiloxane having silicone oil structure in the presence of a hydrosilylation catalyst, and having the both structures in the molecule. Also disclosed is a coating composition including the polyorganosiloxane compound, a silane or silicone resin having an RO—Si group, and a curing catalyst. The former polyorganosiloxane compound is compatible with silicone resins. The latter coating composition can provide coatings improved in flexibility without lowering the curability, surface hardness and weatherability inherent in silicone resins.

Abstract: A coating composition comprising (1) a partial condensate obtained by subjecting a silane compound of RmSiX4−m to hydrolysis and partial condensation with a sufficient amount of water to meet a molar ratio: 1.2≦H2O/Si—X≦10, (2) a vinyl polymer having UV absorbing groups and hydrophilic groups which is dissolvable or dispersible in a water-containing hydrophilic solvent, and (3) a hydrophilic organic solvent can form a hard protective coat having improved weather resistance.

Abstract: A coating composition is provided primarily comprising a (meth)acrylic resin containing hydrolyzable silyl and/or silanol groups, having a silicon atom content of 0.1-5 wt % and a weight average molecular weight of 1,500-30,000, and containing at least 50 mol % based on entire monomeric components of methyl methacrylate. The composition can be easily and reliably applied to substrates having metal portions on their surface, and after coating, can cure with air-borne moisture to form a uniform coat that maintains good electrically insulating properties and prevents the underlying metal portions from corrosion or sulfidation with sulfur compounds, and is thus suitable for the protection of packaging and interconnecting boards.

Abstract: A multilayer laminate is composed of a transparent substrate such as glass, ceramic or plastic on which are applied, in order, a protective layer, a high refractive index layer with a refractive index of at least 1.60, and a low refractive index layer with a refractive index of not more than 1.45, each having a specific resin-based composition. The resulting films, when cured, have an excellent adhesion to the substrate and exhibit outstanding mar resistance and antireflective properties.

Abstract: A coating composition comprising a silicone resin having at least two types of fluorinated organic substituent groups and hydroxyl or monovalent hydrolyzable groups forms, through brief curing at low temperature, a uniform transparent coating having a low refractive index (e.g., below 1.42) and a high hardness as well as excellent water repellency, oil repellency, and antifouling property. Stacking the coating on a high refractive index layer results in an antireflection article having an improved reflectance.

Abstract: To an aromatic ring-bearing synthetic resin such as an aromatic polycarbonate resin or aromatic epoxy resin is added a minor amount of an organopolysiloxane which contains phenyl radicals and monofunctional siloxane units in a molecule wherein the contents of alkoxy radicals and hydroxyl radicals are each set at less than 2% by weight. Molded parts of the resin composition are flame retardant, optically transparent, and recyclable for reuse.

Abstract: A highly dielectric addition type curable composition is provided comprising (A) an organopolysiloxane containing a cyanoalkyl group and a monovalent hydrocarbon group having an aliphatic unsaturated bond, (B) an organohydrogenpolysiloxane containing a cyanoalkyl group, and (C) a platinum group metal catalyst. The composition is easy to handle because of liquid despite solvent-free, less hygroscopic and effectively curable, and has a film-forming ability. The cured composition has excellent dielectric properties as demonstrated by a large dielectric constant and a low dielectric loss.

Abstract: A composition comprising (1) 0.1-50 parts by weight of the reaction product of a hydroxyl group-containing benzophenone compound with a silane and/or a hydrolyzate thereof and (2) 100 parts by weight of a silane compound and/or a hydrolyzate thereof is applied to a polycarbonate sheet to form a protective coating having mar and weather resistance. A composition comprising the reaction product of a hydroxyl group-containing benzophenone compound with a silane and/or a hydrolyzate thereof is useful for undercoating.

Abstract: An addition curing type silicone resin composition is provided including (A) 100 parts by weight of a specific organopolysiloxane with a phenyl group and at least two alkenyl groups within each molecule, (B) 1 to 100 parts by weight of a specific organohydrogenpolysiloxane with a phenyl group and at least two SiH groups within each molecule, and (C) an effective quantity of a hydrosilylation reaction catalyst. A cured product obtained by curing this composition is transparent, displays good strength and particularly good flexural strength, and moreover also displays a high degree of hardness. The composition is applicable to a variety of fields including electrical and electronic equipment, OA equipment and precision instruments.

Abstract: Organosilicon compounds having an organooxysilyl group at one end and a monovalent hydrocarbon group at the other end of the molecule and containing a polysulfide group and organosilicon compounds having organooxysilyl groups at both ends of the molecule and containing a divalent hydrocarbon group flanked with polysulfide groups at a center thereof are useful as a compounding additive to inorganic-organic composite materials and a surface treating agent for fillers, Processes capable of effective preparation of these organosilicon compounds are also provided.

Abstract: In a coated article comprising an undercoat and an overcoat on a substrate, the undercoat comprising a compound having a hydrolyzable group-bearing silyl group represented by SiX3−a wherein X is a hydrolyzable group and “a” is equal to 0, 1 or 2; and the overcoat is based on a composition comprising a silicone resin-containing emulsion resulting from emulsion polymerization of a mixed solution containing (A-1) a silanol group-bearing silicone resin comprising 30-100 mol % of T units and based on the T units, 30-80 mol % of T-2 units, and having a Mn of at least 500, and (A-2) a radical-polymerizable vinyl monomer. Due to a firm bond between the overcoat and the undercoat, the coated article exhibits a weather and water resistance sufficient to withstand long-term outdoor exposure.

Abstract: In a coated article comprising an undercoat and an overcoat on a substrate, the undercoat comprising a compound having a hydrolyzable group-bearing silyl group represented by SiX3−a wherein X is a hydrolyzable group and “a” is equal to 0, 1 or 2; and the overcoat is based on a composition comprising a silicone resin-containing emulsion resulting from emulsion polymerization of a mixed solution containing (A-1) a silanol group-bearing silicone resin comprising 30-100 mol % of T units and based on the T units, 30-80 mol % of T-2 units, and having a Mn of at least 500, and (A-2) a radical-polymerizable vinyl monomer. Due to a firm bond between the overcoat and the undercoat, the coated article exhibits a weather and water resistance sufficient to withstand long-term outdoor exposure.

Abstract: An aqueous coating composition including (A) an amino group-containing organopolysiloxane, (B) water and (C) at least one of a surface-active agent represented by the general formula (I): 1

Abstract: A polyorganosiloxane compound obtained by allowing a polyorganosiloxane having silicone resin structure to react with a polyorganosiloxane having silicone oil structure in the presence of a hydrosilylation catalyst, and having the both structures in the molecule. Also disclosed is a coating composition including the polyorganosiloxane compound, a silane or silicone resin having an RO—Si group, and a curing catalyst. The former polyorganosiloxane compound is compatible with silicone resins. The latter coating composition can provide coatings improved in flexibility without lowering the curability, surface hardness and weatherability inherent in silicone resins.