Abstract: Provided is a primer composition that contains: (A) a copolymer (A-1) which contains a constituent unit represented by the formula shown below and which does not contain a prescribed ultraviolet radiation-absorbing group (R1 denotes a hydrogen atom or the like, R2 denotes a monovalent hydrocarbon group or the like, R4 denotes a hydrogen atom or the like, R5 and R6 each denote an alkyl group or the like. X2 denotes an alkyleneoxycarbonyl group or the like, n denotes an integer between 1 and 3, and * denotes a bond to an adjacent constituent unit); a vinyl-based (co)polymer (A-2) which does not contain an alkoxysilyl, does not contain a prescribed ultraviolet radiation-absorbing group, and has a glass transition point of 80° C. or higher; an ultraviolet radiation absorber (B); a compound (C) having a cyclic hindered amine structure; inorganic particles (D) having a median diameter of 100 nm or less; and a solvent (E). The (A-1):(A-2) mass ratio is 3:1 to 1:3.

Abstract: This photoreactive organopolysiloxane has a structural unit ratio represented by formula (1), contains 1-90 mass % of a group having a photopolymerization initiation site, has excellent compatibility to polymerizable organic compounds such as an acrylate compound, and has a photopolymerization initiation site capable of providing photocurability even in atmospheric air. (R13SiO1/2)a(R12SiO2/2)b(R1SiO3/2)c(SiO4/2)d??(1) (In the formula, each R1 independently represents an alkyl group or an aryl group optionally having a substituent group and respectively including 1-20 carbon atoms or 6-20 carbon atoms, or a group having a photopolymerization initiation site, a represents a number of 0.1-0.8, b represents a number of 0-0.5, c represents a number of 0-0.5, and d represents a number of 0.2-0.9, and a+b+c+d=1 is satisfied.

Abstract: A photocurable composition including the following components (A) to (D), (A) a monomer having one (meth)acryloyl structure, (B) a crosslinking agent having two or more (meth)acryloyl structures, (C) an inorganic ultraviolet-blocking agent having a 50% volume cumulative particle size of 1 to 50 nm, and (D) a photopolymerization initiator in an amount of 0.05 to 1 part by weight, relative to total 100 parts by weight of components (A) and (B), wherein a part or all of component (A) is a hydrophilic monomer, and a content of the hydrophilic monomer is 70% by weight or more, relative to the total weight of components (A) and (B).

Abstract: A photocatalyst laminate which is composed of an undercoat layer provided on a substrate and a photocatalyst layer laminated on the surface of the undercoat layer. The undercoat layer contains (A) 100 parts by mass of a resin component and (B) 0.1-50 parts by mass of fine core-shell particles, each of which has a core that is formed of a fine tetragonal titanium oxide solid solution particle wherein tin and manganese are solid-solved and a shell that is formed from silicon oxide on the outside of the core. This photocatalyst laminate is not susceptible to decrease in the photocatalyst function even under outdoor exposure for a long period of time, and is thus capable of providing a coated article that exhibits excellent weather resistance.

Abstract: A layered coating system with enhanced properties capable of protecting an article or a component of an article from exposure to outdoor elements, including UV radiation, extreme temperatures, water, acid rain, other fluids and chemicals; scratching and marring from surface contact; and more. The layered coating system and articles formed therewith are characterized by properties that can include UV-absorption, abrasion and scratch resistance, adhesion to the substrate and within the coating layers, haze and visible light transparency, and impact resistance.

Abstract: A photocurable composition including the following components (A) to (D), (A) a monomer having one (meth)acryloyl structure, (B) a crosslinking agent having two or more (meth)acryloyl structures, (C) an inorganic ultraviolet-blocking agent having a 50% volume cumulative particle size of 1 to 50 nm, and (D) a photopolymerization initiator in an amount of 0.05 to 1 part by weight, relative to total 100 parts by weight of components (A) and (B), wherein a part or all of component (A) is a hydrophilic monomer, and a content of the hydrophilic monomer is 70% by weight or more, relative to the total weight of components (A) and (B).

Abstract: An inorganic particle/siloxane composite which comprises a product of cohydrolysis and cocondensation of (A) at least one compound or product selected from among silicon compounds represented by general formulae (1) to (4) and products of partial hydrolysis and condensation thereof and (B) inorganic particles which, when examined by the dynamic light scattering method, give a volume-based particle diameter distribution that has a 50%-cumulation particle diameter (D50) of 3-100 nm, wherein the number of silicon atoms derived from the silicon compound represented by general formula (2) is 20 mol % or more of the number of all the silicon atoms in the component (A). The component (B) is contained in an amount of 65 mass % or less with respect to the whole product of cohydrolysis and cocondensation. The inorganic particle/siloxane composite has satisfactory compatibility with silicone materials although containing substantially no volatile organic solvent.

Abstract: A coating composition containing (A) 100 parts by mass of a room-temperature-curable resin and (B) 0.1-50 parts by mass of core-shell microparticles that include tetragonal titanium oxide solid solution microparticles in which tin and manganese have been dissolved as the core and a shell of silicon oxide on the outer side of the core exhibits room-temperature curability during coating film curing and exhibits UV shielding properties while maintaining transparency to visible light, whereby it is possible to provide a cured film capable of suppressing discoloration and deterioration of a substrate without compromising the appearance of the substrate.

Abstract: A photocatalyst laminate which is composed of an undercoat layer provided on a substrate and a photocatalyst layer laminated on the surface of the undercoat layer. The undercoat layer contains (A) 100 parts by mass of a resin component and (B) 0.1-50 parts by mass of fine core-shell particles, each of which has a core that is formed of a fine tetragonal titanium oxide solid solution particle wherein tin and manganese are solid-solved and a shell that is formed from silicon oxide on the outside of the core. This photocatalyst laminate is not susceptible to decrease in the photocatalyst function even under outdoor exposure for a long period of time, and is thus capable of providing a coated article that exhibits excellent weather resistance.

Abstract: A silicone rubber composition is provided comprising (A) an alkenyl-containing organopolysiloxane, (B) reinforcing silica, (C) an inorganic particle-polysiloxane composite comprising inorganic nanoparticles having a polysiloxane containing SiR2R3O2/2 and SiR4R5R6O1/2 units grafted to their surface, and (D) a curing agent. The composition cures into a transparent silicone rubber having UV-absorbing ability and heat resistance.

Abstract: An inorganic particle-polysiloxane composite comprising inorganic particles having a polysiloxane containing SiR2R3O2/2 and SiR4R5R6O1/2 units grafted to their surface is prepared without mechanical treatment. The inorganic particles have an average particle size of 1-200 nm, the polysiloxane may be bonded to the inorganic particle surface via a siloxane coating layer containing SiR1O3/2 units, and a total of siloxane constituents is 20-20,000 pbw per 100 pbw of the inorganic particles. R1 to R5 are H, alkyl, alkenyl, aryl or dimethylsiloxy group, and R6 is H, alkyl, alkenyl, aryl, dimethylsiloxy, alkoxy or hydroxyl group. The inorganic particle-polysiloxane composite is dispersible in silicone oil, and so a transparent functional silicone material is obtained.

Abstract: A silicone rubber composition is provided comprising (A) an alkenyl-containing organopolysiloxane, (B) reinforcing silica, (C) an inorganic particle-polysiloxane composite comprising inorganic nanoparticles having a polysiloxane containing SiR2R3O3/2 and SiR4R5R6O1/2 units grafted to their surface, and (D) a curing agent. The composition cures into a transparent silicone rubber having UV-absorbing ability and heat resistance.