A dispersion liquid contains an inorganic oxide particle surface-treated with at least one of a compound represented by Formula Si(R.sup.A1)(X.sup.A1).sub.3 or a compound represented by Formula Si(R.sup.A2)(R.sup.A20)(X.sup.A2).sup.2, polysiloxane having at least one of a T unit represented by Formula [R.sup.B1SiO.sub.3/2] or a D unit represented by Formula [R.sup.B2R.sup.B20SiO], and an organic solvent, where a content of the polysiloxane is 0.5% to 39% by mass with respect to a total amount of the inorganic oxide particle and the polysiloxane, in which in the formula, R.sup.A1, R.sup.A2, R.sup.B1, and R.sup.B2 represent a functional group, X.sup.A1 and X.sup.A2 represent a hydroxyl group or a hydrolyzable group, and R.sup.A20 and R.sup.B20 represent an alkyl group or an aryl group.

The purpose of the present invention is to provide a coating composition for outer walls and building exteriors, which gives a substrate water repellency, water resistance, rain streak stain resistance, stain resistance, and weather resistance; and an article, a building material for outer walls and building exteriors, each having a coating formed from the aforesaid coating composition. The present invention provides a coating composition for an outer wall or exterior of building, wherein the coating composition comprises the following components (A) to (D): (A) an emulsion of a silicone acrylic copolymer resin which is a copolymer of 60 to 99 parts by mass of (a1) a polyorganosiloxane represented by the formula (1) and 1 to 40 parts by mass of (a2) an acrylic acid ester monomer and/or a methacrylic acid ester monomer, provided that a total amount of components (a1) and (a2) is 100 parts by mass, the emulsion being in an amount of 0.5 to 20 parts by mass as a solid content, (B) at least one resin emulsion in an amount of 20 to 80 parts by mass as a solid content, selected from the group consisting of acrylic resin emulsions other than component (A), urethane resin emulsions and alkyd resin emulsions, (C) pigment in an amount of 1 to 50 parts by mass, and (D) a flame retardant in an amount of 1 to 10 parts by mass, provided that a total mass of the solid contents of components (A) and (B) and the amounts of components (C) and (D) is 100 parts by mass.

The purpose of the present invention is to provide a coating composition for outer walls and building exteriors, which gives a substrate water repellency, water resistance, rain streak stain resistance, stain resistance, and weather resistance; and an article, a building material for outer walls and building exteriors, each having a coating formed from the aforesaid coating composition. The present invention provides a coating composition for an outer wall or exterior of building, wherein the coating composition comprises the following components (A) to (D): (A) an emulsion of a silicone acrylic copolymer resin which is a copolymer of 60 to 99 parts by mass of (a1) a polyorganosiloxane represented by the formula (1) and 1 to 40 parts by mass of (a2) an acrylic acid ester monomer and/or a methacrylic acid ester monomer, provided that a total amount of components (a1) and (a2) is 100 parts by mass, the emulsion being in an amount of 0.5 to 20 parts by mass as a solid content, (B) at least one resin emulsion in an amount of 20 to 80 parts by mass as a solid content, selected from the group consisting of acrylic resin emulsions other than component (A), urethane resin emulsions and alkyd resin emulsions, (C) pigment in an amount of 1 to 50 parts by mass, and (D) a flame retardant in an amount of 1 to 10 parts by mass, provided that a total mass of the solid contents of components (A) and (B) and the amounts of components (C) and (D) is 100 parts by mass.

Provided are a low-viscosity ultraviolet curable silicone composition capable of being used even in a surface exposure method and a lift-up method etc.; and a cured product superior in tensile strength and elongation at break. The ultraviolet curable silicone composition contains: (A) an organopolysiloxane; (B) a photopolymerization initiator; and (C) a monofunctional (meth)acrylate compound having no siloxane structure and/or (D) a multifunctional (meth)acrylate compound having no siloxane structure, wherein the organopolysiloxane is represented by the following general formula (1):

##STR00001## wherein n satisfies 1≤n≤1,000, m satisfies 1≤m≤1,000, Ar is an aromatic group, R.sup.1 represents a monovalent hydrocarbon group having 1 to 20 carbon atoms, A is a group represented by the following formula (2):

##STR00002## wherein p satisfies 0≤p≤10, a satisfies 1≤a≤3, R.sup.1 represents a monovalent hydrocarbon group having 1 to 20 carbon atoms, R.sup.2 represents an oxygen atom or an alkylene group, R.sup.3 represents an acryloyloxyalkyl group or the like.

Provided are a low-viscosity ultraviolet curable silicone composition capable of being used even in a surface exposure method and a lift-up method etc.; and a cured product superior in tensile strength and elongation at break. The ultraviolet curable silicone composition contains: (A) an organopolysiloxane; (B) a photopolymerization initiator; and (C) a monofunctional (meth)acrylate compound having no siloxane structure and/or (D) a multifunctional (meth)acrylate compound having no siloxane structure, wherein the organopolysiloxane is represented by the following general formula (1):

##STR00001## wherein n satisfies 1≤n≤1,000, m satisfies 1≤m≤1,000, Ar is an aromatic group, R.sup.1 represents a monovalent hydrocarbon group having 1 to 20 carbon atoms, A is a group represented by the following formula (2):

##STR00002## wherein p satisfies 0≤p≤10, a satisfies 1≤a≤3, R.sup.1 represents a monovalent hydrocarbon group having 1 to 20 carbon atoms, R.sup.2 represents an oxygen atom or an alkylene group, R.sup.3 represents an acryloyloxyalkyl group or the like.

Provided is a collection of polymer particles comprising (I) a plurality of acrylic particles (I) each comprising (a) an acrylic core polymer (Ia) comprising (i) polymerized units of one or more monovinyl acrylic monomers (Iai), (ii) polymerized units of one or more Si-free graftlinkers (Iaii), (b) a shell polymer (Ib), (II) a plurality of hybrid polymer particles (II), each comprising (a) a core polymer (IIa) comprising (i) polymerized units of one or more silicon-containing monomers (IIai); (ii) optionally, polymerized units of one or more monovinyl acrylic monomers (IIaii); and (iii) polymerized units of one or more Si-free graftlinkers (IIaiii); (b) a shell polymer (IIb) comprising polymerized units of one or more acrylic monomers (IIb).

Provided is a collection of polymer particles comprising (I) a plurality of acrylic particles (I) each comprising (a) an acrylic core polymer (Ia) comprising (i) polymerized units of one or more monovinyl acrylic monomers (Iai), (ii) polymerized units of one or more Si-free graftlinkers (Iaii), (b) a shell polymer (Ib), (II) a plurality of hybrid polymer particles (II), each comprising (a) a core polymer (IIa) comprising (i) polymerized units of one or more silicon-containing monomers (IIai); (ii) optionally, polymerized units of one or more monovinyl acrylic monomers (IIaii); and (iii) polymerized units of one or more Si-free graftlinkers (IIaiii); (b) a shell polymer (IIb) comprising polymerized units of one or more acrylic monomers (IIb).

A method for producing an optical silicone assembly is disclosed. The method comprises the steps of: i) treating a surface of a substrate with an optically clear silicone adhesive composition; ii) placing the substrate obtained by step i) into a mold; iii-a) injecting an optically clear moldable silicone composition into the mold, and/or iii-b) overmolding the optically clear moldable silicone composition onto the substrate; and then iv) heating the optically clear moldable silicone composition to form the optical silicone assembly. The optical silicone assembly produced by the method of this disclosure is characterized by excellent adhesion of an optical silicone product to various types of substrates.

A method for producing an optical silicone assembly is disclosed. The method comprises the steps of: i) treating a surface of a substrate with an optically clear silicone adhesive composition; ii) placing the substrate obtained by step i) into a mold; iii-a) injecting an optically clear moldable silicone composition into the mold, and/or iii-b) overmolding the optically clear moldable silicone composition onto the substrate; and then iv) heating the optically clear moldable silicone composition to form the optical silicone assembly. The optical silicone assembly produced by the method of this disclosure is characterized by excellent adhesion of an optical silicone product to various types of substrates.

Provided is a polymer particle comprising (a) a core polymer comprising (i) polymerized units of one or more Si-containing monomers; (ii) polymerized units of one or more monovinyl acrylic monomers (ii); and (iii) polymerized units of one or more graftlinkers that have no silicon atoms; (b) a shell polymer comprising polymerized units of one or more acrylic monomers.

Also provided is a composition comprising polyvinyl chloride and a plurality of the polyer particles.