High impact resistant, high gloss, and high environmental stress crack resistant polymeric compositions

摘要

A polymeric composition is provided which exhibits a combination of high gloss and high environmental stress crack resistance, comprising:;(a) high impact polystyrene having a gloss at 60 degrees of greater than 85% and an impact resistance of greater than 0.7 ft-lb/inch,;(b) high density polyethylene which has a density greater than or equal to about 0.94 g/cm³, and which has a stress exponent less than or equal to about 1.70; and;(c) a compatibilizing polymer for components (a) and (b), selected from the group consisting of diblock styrene butadiene copolymers, triblock styrene butadiene copolymers, diblock styrene isoprene copolymers, triblock styrene isoprene copolymers, and mixtures thereof,;wherein the gloss at 60 degrees of the composition is greater than or equal to about 85%, and the environmental stress crack resistance measured in minutes until breakage at 1000 psi is greater than about 60.