Patent ID: 8242232

Claim:
A copolymer comprising a repeat unit of formula (I) and at least one repeat unit of formula II: wherein: at least from about 20% to about 90% of the copolymer is the repeat unit of formula (I), by weight based on the total weight of the copolymer; Z is oxygen; R 1 is independently at each occurrence a C 6 -C 24 divalent organic moiety, provided that in at least 55% of the occurrences of R 1 , R 1 is independently at each occurrence a 1-methyl-2,4-phenylene or 1-methyl-2,6-phenylene; R 2 is independently at each occurrence a bond or C 1 -C 14 alkylene; R 3 is independently at each occurrence a polyoxyalkylene having a number average molecular weight (M n ) from about 400 to about 10,000; and wherein the copolymer comprises at least one amorphous polyamide segment having from 2 to about 200 repeat units of formula (I).