Mitsubishi Rayon Company, Limited

Tsukasa Mizobuchi

Suehiro Tayama

Misao Tamura

Yukio Kobayashi

Masamoto Uenishi

Masatoshi Takesue

Shoichi Nagai

Disclosed is a coating composition comprising (A) 5 to 60 parts by weight, on a solid basis, of colloidal silica, (B) 5 to 70 parts by weight of a hydrolyzate and/or hydrolyzed and partially condensed product of a compound of the general formula ##STR1## (C) 10 to 80 parts by weight of a polyfunctional monomer containing a monomer of the general formula ##STR2## and (D) 0.01 to 5 parts by weight of a photopolymerization initiator containing a compound of the general formula ##STR3## provided that the combined amount of components (A), (B), (C) and (D) is 100 parts by weight. This coating composition can be cured in air by exposure to ultraviolet light, and the resulting cured film is excellent in various properties (such as abrasion resistance) and adhesion to the substrate.

Process for producing abrasion-resistant synthetic resin molded articles

Disclosed are shaped articles having a coating layer formed on surface region, wherein the surface region is formed of a polymer derived from a multifunctional acrylic monomer and having 0.02 to 0.2 .mu.mol/cm.sup.2 of acidic groups therein, by curing a coating composition consisting essentially of a specific silica polycondensate. The silica polycondensate is obtained by mixing (I) colloidal silica and (II) a specific silicon compound in such a molar ratio that the average number of hydrolyzable groups is within the range of 2.30 to 3.85, and then subjecting them to cohydrolysis and polycondensation. In these shaped articles, the coating layer have excellent properties such as hardness and abrasion resistance, as well as good adhesion.

Coated shaped articles and method of making same

Disclosed is a coating composition comprising

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Aichi, Japan

Tsukasa Mizobuchi