Importance

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Abstract

In an uncured filled coating composition comprising (a) a polyfuntional acrylic-type carboxylic acid ester monomer or its prepolymer, (b) a polymerization initiator capable of curing said monomer or prepolymer (a), and (c) an inorganic solid filler; the improvement wherein said composition consists essentially of (A) 100 parts by weight of said polyfunctional acrylic-acid carboxylic acid ester monomer or its prepolymer (a), said polyfunctional monomer or prepolymer (a) being composed of 0 to 75% by weight of a trifunctional or higher acrylic-type carboxylic acid ester monomer or its prepolymer having a molecular weight of about 200 to about 700 and 25 to 100% by weight of a difunctional acrylic-type carboxylic acid ester monomer or its prepolymer having a molecular weight of about 160 to about 400, (B) 0.001 to 20 parts by weight of said polymerization initiator (b) capable of curing said monomer or prepolymer (A), and (C) 5 to 250 parts by weight of said inorganic solid filler (c), said filler (c) having a refractive index of 1.40 to 1.60 and an average first-order particle diameter of at least 1 m.mu. but less than 1.mu.; and a cured filled coating composition prepared by curing the said uncured filled coating composition.

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