Polymer compositions having improved impact strength

Molding compositions having improved impact strength at low temperatures comprising

• a) about 60-98 wt % of a copolyester consisting essentially of repeat units from terephthalic acid, ethylene glycol and 1,4-cyclohexanedimethanol wherein the mole ratio of ethylene glycol to 1,4-cyclohexane-dimethanol is from 2:98 to 98:2, said copolyester having an I.V. of about 0.3 to 1.0, and about 2-40 wt % of an epoxy functional polyolefin having an average of about 1 to about 100 epoxy groups per polymer chain based on the number average molecular weight of said polyolefin, said polyolefin consisting essentially of repeat units of .alpha.-olefins at 2-6 carbon atoms and repeat units from at least one epoxy functional monomer selected from ##STR2##