Novel thermoplastic polyester compositions containing certain low molecular weight depoxide resins and having improved impact behaviour.

摘要

Novel thermoplastic polyester compositions having improved impact behavior are produced. These compositions comprise a blend of poly (C2-C4 alkylene terephthalate) with certain low molecular weight diepoxide resins, a triphenyl phosphonium halide catalyst, and a multiphase composite polymer. The multiphase polymer has a first elastomeric phase polymerized from a monomer system including butadiene or butadienestyrene and a final rigid thermoplastic phase polymerized in the presence of the elastomeric phase.