Polycarbonate polyester articles with enhanced adhesion between outer layer and base substrate
AssigneeGeneral Electric Company
InventorsPeter H. Th. Vollenberg, Gabrie Hoogland
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Abstract
An clear coated article formed from a transparent/translucent molding composition comprising a uniform miscible resin blend of a polycarbonate resin and a cycloaliphatic polyester resin, said cycloaliphatic polyester resin comprising the reaction product of an aliphatic C2-C20 diol or chemical equivalent and a C6-C20 aliphatic diacid or chemical equivalent, said cycloaliphatic polyester resin contains at least about 80% by weight of a cycloaliphatic dicarboxylic acid, or chemical equivalent, and/or of a cycloaliphatic diol or chemical equivalent, wherein the cycloaliphatic polyester resin and the polycarbonate resin have a viscosity selected for enhancing the adhesion of the clear coat to the article.
Claims20
An article for use in exterior applications comprising:
- a) a base substrate comprising a uniform miscible resin blend of a polycarbonate resin and a cycloaliphatic polyester resin, said cycloaliphatic polyester resin comprising the reaction product of an aliphatic C2-C20 diol or chemical equivalent and a C6-C20 aliphatic diacid or chemical equivalent, said cycloaliphatic polyester resin contains at least about 80% by weight of a cycloaliphatic dicarboxylic acid, or chemical equivalent, and/or of a cycloaliphatic diol or chemical equivalent;
- b) an outer layer on said base substrate, said outer layer comprising an acrylic resin, a blend of a thermoplastic fluorinated polymer and an acrylic resin, an inclusive ionomer, a polycarbonate, a polyvinyl chloride, or a thermoplastic polyurethane, wherein the viscosity of the base layer is selected to improve the adhesion between the base substrate and the outer layer.
An article for use in exterior applications comprising:
- a) a base substrate comprising a uniform miscible resin blend having a viscosity and comprising a polycarbonate resin and a cycloaliphatic polyester resin, said cycloaliphatic polyester resin comprising the reaction product of an aliphatic C2-C20 diol or chemical equivalent and a C6-C20 aliphatic diacid or chemical equivalent, said cycloaliphatic polyester resin contains at least about 80% by weight of a cycloaliphatic dicarboxylic acid, or chemical equivalent, and/or of a cycloaliphatic diol or chemical equivalent;
- b) an outer clear coat layer on said base substrate;
- said outer clear coat layer comprising an acrylic resin, a blend of a thermoplastic fluorinated polymer and an acrylic resin, an inclusive ionomer, a polycarbonate, a polyvinyl chloride or a thermoplastic polyurethane, said viscosity of said base layer being selected for enhancing the adherence of said clear coat;
- c) said base substrate having a polyester content in the polyester polycarbonate blend of 70% or higher wherein said cycloaliphatic polyester resin has a viscosity of about 1500 to about 2500 poise for reducing the delamination of the clear coat or said base substrate having a polyester content in the polyester polycarbonate blend of about 20% to about 40 by weight wherein said polycarbonate resin has an MFR of 7 or greater for reducing the delamination of the clear coat.
Dependencies are inferred from the claim text.