Patent ID: 7205351
Filing Date: 2007-04-17
Classification: B29C,C08K

Abstract:
1. A polymer compositions comprising a synthetic polymer and a processing aid wherein the processing aid comprises esters of poly-carboxylic acids, or anhydrides thereof; wherein the poly-carboxylic acids are dimer or trimer acids having from 30 to 60 carbon atoms; wherein the acids or anhydrides are esterified with saturated aliphatic, unsaturated aliphatic, cycloaliphatic or aromatic mono-epoxides or mono-alcohols, wherein the epoxides and alcohols optionally contain ether groups; wherein from about 10% and to about 90% of the carboxyl groups of the acids have been esterified; wherein the synthetic polymer is a thermoplastic polymer or a thermoset polymer, the thermoplastic polymer is selected from the group consisting of polyvinyl chloride, polyvinylidene chloride, polyethylene, polypropylene, polyamide, polycarbonate, polystyrene, poly (meth) acrylate, polyester, ethylene-vinyl acetate copolymers, polyacrylonitrile, graft polymers of vinyl chloride and vinyl acetate, copolymers of vinyl chloride and vinyl acetate, and mixtures thereof; and the thermoset polymer is selected from the group consisting of an unsaturated polyester resin system, a polyurethane system, a curable (meth) acrylate resin system, or mixtures thereof.