Elevated temperature dimensionally stable, impact modified polyester with low gas permeability

摘要: Polyester composition with improved impact properties, oxygen permeability and dimensional shrinkage during heating. Impact modifiers are dissolved into a molten polyester to form eutectic alloy. On slow cooling, the alloy of invention freezes mixture particles modifier embedded in matrix polyester. By controlling solidification melt, size distribution precipitates from melt can be controlled, which allows control mechanical properties. The precipitation also controlled either by homogenous nucleation or heterogeneous through addition nucleating agent introduction suitable surface for nucleation. provides process manufacturing above polyester, an article comprising this making article. crystalline is useful as container microwavable, ovenable and/or frozen foods, has gas barrier strength, post-mold stability between −60° C. 200°