Polyester compositions and insert-molded articles made therefrom

摘要

A thermoplastic polyester composition comprises polyalkylene terephthalate, a block copolymer comprising a semi-crystalline polyolefin block and at least one of a vinyl aromatic polymer block and an elastomeric polyolefin block, and reinforcing filler. The composition is capable of providing insert-molded articles, comprising a metal part, with high durability and resistance to cracking when subjected to a rigorous thermal cycle.

主权项

1. A thermoplastic polyester composition comprising, based on the total weight of the composition:
from 49 to 88 wt. % of polyalkylene terephthalate; from 1 to 20 wt. % of an epoxy-functional block copolymer comprising a semi-crystalline polyolefin block having a crystallinity of at least about 25% as determined by X-ray scattering and further comprising a vinyl aromatic polymer block, an elastomeric polyolefin block, or combinations thereof; from 1 to 20 wt. % of carboxy-reactive impact modifier; and from 10 to 40 wt. % of reinforcing filler.