Method of forming an abrasion-resistant coating on molded articles
First Claim
1. A method of forming an abrasion-resistant coating on molded polymeric articles formed by curing a polymerizable monomer-containing molding composition in a mold comprising:
- (a) applying to said mold a coating composition curable by actinic radiation comprising a pentaerythritol-based polyacrylate or polymethacrylate and a cellulose ester or a vinyl chloride-vinyl acetate containing copolymer;
(b) exposing said coating composition to actinic radiation to form a cured coating on said mold;
(c) adding to the mold a heat polymerizable monomer-containing molding composition; and
(d) polymerizing said molding composition in the form of a molded article, said cured coating transferring to the surface of said molded article.
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Abstract
The present invention provides a method of forming a coating on molded polymeric articles formed by curing a polymerizable monomer-containing molding composition in a mold comprised of a material having less bonding affinity for the abrasion-resistant coating than for the cured molding composition. The method comprises:
(a) applying to a mold a coating composition comprising a pentaerythritol based polyacrylate or polmethacrylate and, a cellulose ester or a vinyl chloride-vinyl acetate containing copolymer;
(b) exposing said coating composition to actinic radiation to form a cured coating;
(c) adding to the mold a heat polymerizable monomer-containing molding composition; and
(d) polymerizing said molding composition in the form of a molded article, said cured coating bonding to the surface of said molded article.
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Citations
9 Claims
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1. A method of forming an abrasion-resistant coating on molded polymeric articles formed by curing a polymerizable monomer-containing molding composition in a mold comprising:
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(a) applying to said mold a coating composition curable by actinic radiation comprising a pentaerythritol-based polyacrylate or polymethacrylate and a cellulose ester or a vinyl chloride-vinyl acetate containing copolymer; (b) exposing said coating composition to actinic radiation to form a cured coating on said mold; (c) adding to the mold a heat polymerizable monomer-containing molding composition; and (d) polymerizing said molding composition in the form of a molded article, said cured coating transferring to the surface of said molded article. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of forming a coating on a molded polymeric article formed by curing a polymerizable monomer-containing molding composition in a mold comprising:
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(a) applying to said mold a coating composition curable by actinic radiation comprising pentaerythritol tetraacrylate, cellulose acetate butyrate or a partially hydrolyzed vinyl chloride-vinyl acetate copolymer containing from about 50% to 95% combined vinyl chloride monomer, from about 2% to about 35% combined vinyl acetate monomer and from about 3% to about 25% combined vinyl alcohol and a photoinitiator; (b) exposing said coating to actinic radiation to form a cured coating on said mold; (c) adding to the mold a polymerizable monomer-containing molding composition; and (d) polymerizing said molding composition in the form of a molded article, said cured coating bonding to the surface of said molded article.
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Specification