Polyester compositions
AssigneeUnion Carbide Corporation
InventorsLowell R. Comstock, Percy L. Smith
Life of this patent
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Abstract
The disclosure of this application is directed to unsaturated polyester compositions, containing as a low-profile additive a carboxyl containing thermoplastic polymer of a vinyl ester of an aliphatic, saturated monocarboxylic acid, which have particular utility in molding applications to form aesthetically attractive thermoset articles characterized by excellent physical properties, as for example, impact strength and by excellent surface properties such as excellent smoothness and gloss, excellent receptiveness to paints and excellent reproduction of the surface contours of the mold in which they are formed into shaped, thermoset articles.
Claims40
A composition, suitable for use in molding, comprising an ethylenically unsaturated monomer, an unsaturated polyester which is the condensation product of an ethylenically unsaturated polycarboxylic acid or anhydride and a polyol, and, as a low profile additive, in an amount of from about 1 to about 85 weight percent, based on weight of said unsaturated polyester, a carboxyl containing polymer of a vinyl ester of an aliphatic, saturated monocarboxylic acid, wherein said carboxyl containing polymer contains from about 0.2 to about 5 weight percent of a polymerized carboxyl containing comonomer, and at least about 5 weight percent of polymerized vinyl alkanoate.
A composition comprising (A) an unsaturated polyester which is the condensation product of at least one ethylenically unsaturated dicarboxylic acid with at least one dihydric alcohol, (B) an ethylenically unsaturated monomer, and (C) 1 to 60 percent by weight, based on the combined weight of the unsaturated polyester and the ethylenically unsaturated monomer, of a polymer containing, in combined form, vinyl acetate and about 0.2 to about 5 percent by weight of ethylenically unsaturated carboxylic acid.
A composition as defined in claim 40 wherein said thermoplastic polymer is prepared from a polymerizable, ethylenically unsaturated monomer selected from the group consisting of vinyl chloride, vinyl bromide, vinyl fluoride, vinylidene chloride, vinylidene bromide, methyl acrylate, ethyl acrylate, butyl acrylate, n-octyl acrylate, 2-ethyl hexyl acrylate, n-decyl acrylate, glycidal methacrylate, acrylamide, n-methyl acrylamide, n,n-dimethylacrylamide, methyl acrylamide, n-methyl methacrylamide, n,n-dimethyl methacrylamide, acrylonitrile, chloroacrylonitrile, methacrylonitrile, ethacrylonitrile, vinyl naphthalene, dimethyl maleate, dibutyl maleate, vinyl methyl ether, vinyl ethyl ether, vinyl isobutyl ether, 2-chloroethyl vinyl ether, methyl vinyl ketone, ethyl vinyl ketone, isobutyl vinyl ketone, vinyl pyridine, n-vinyl carbazole, n-vinyl pyrrolidene, ethyl methylene malonate, isobutylene, ethylene, trichloroethylene, propylene, and vinyl norbornene.
Dependencies are inferred from the claim text.