Mitsubishi Rayon Company, Limited

Akira Oshima

Keisuke Yoshihara

Tuneo Ikeda

Mikio Shiki

Kazunori Abe

Toshio Yoshihara

Nobuo Kameda

Naoyuki Fukabori

Yasuyuki Yamasaki

A process for producing a synthetic resin article having an excellent resistance to surface abrasion is described which is characterized by having a synthetic resin surface layer, firmly adhered to the base resin, the synthetic resin surface layer comprising a polymer or copolymer containing at least 40% by weight in polymerized form of at least one compound having a total of at least three acryloxy (CH.sub.2 .dbd.CH.CO.0-) and/or methacryloxy (CH.sub.2 .dbd.CH(CH.sub.3)CO.O-) groups in the molecule. The article is prepared by (1) forming the above synthetic resin layer on the inner surface of a mold and then, charging a monomer for base resin into the mold and polymerizing the monomer, or (2) directly forming the synthetic resin surface layer on the surface of a synthetic resin shaped article.

Process for producing a synthetic resin article having improved

An improvement in a process for producing a synthetic resin cast article having an abrasion-resistant polymer surface layer integrated with the polymer body is provided. The improvement is characterized in that the abrasion-resistant polymer surface layer is formed by a two step polymerization procedure; in the first polymerization step, the polymerizable material is covered with a covering body such as a polymer film, closely adhered thereto, and in the second polymerization step, the polymerizable material is exposed to the air.

Process for producing abrasion-resistant cast article

A synthetic resin shaped article having a mar-resistant polymer surface layer integrated with the polymer body is provided. The mar resistant polymer surface layer consisting essentially of, in polymerized form, (a) 20 to 100 wt.% of a compound having a total of at least three acryloxy and/or metharyloxy groups linked with a straight chain aliphatic hydrocarbon residue having not more than 20 carbon atoms (the hydrocarbon residue may contain at least one ether linkage in the main chain) and (b) 0 to 80 wt.% of at least one copolymerizable mono- or diethylenically unsaturated compound.

Mar-resistant synthetic resin shaped article

A plastic article having improved surface characteristics comprises a plastic body having adhered thereon a cross-linked film of a composition comprising (A) 10 to 90 parts by weight of a cross-linking unsaturated compound having a molecular weight of M and containing in the molecule N polymerizable ethylenically unsaturated radicals (N being an integer of 2 or more), the ratio of said molecular weight, M, to said number, N, of ethylenically unsaturated radicals (M/N) being about 49 to about 600, (B) 90 to 10 parts by weight of an unsaturated monomer containing in the molecule at least one radical copolymerizable with said component (A) and at least one acid radical, and (C) up to 20 parts by weight of other copolymerizable unsaturated compounds, the total of (A), (B) and (C) being 100 parts by weight, at least a part of the acid radicals contained in the film having been converted into alkali salts thereof, said cross-linked film having a thickness of 5 to 500 .mu.. The above plastic article is produced by forming on the surface of a plastic body a cross-linked film of the composition comprising the components (A), (B) and (C) and then treating the cross-linked film with a base to convert the acid radical into its alkali salt.

Growing community of inventors

Otake, Japan

Akira Oshima