Patent ID: 6887952

Claim:
A compound of the formula: wherein X is (alkylene oxide) n ; n is between about 40 to about 450; and Y and Z are independently arylene or heteroarylene units having 5 or 6 ring atoms, optionally substituted with from 1 to 4 substituents independently selected from the group consisting of C 1-6 alkyl straight or branched chain, halogen, trihalomethyl, C 1-6 alkoxy, â€”NO 2 , â€”NH 2 , â€”OH, â€”COORâ€², where Râ€² is H or lower alkyl, â€”CH 2 OH, â€”CONH 2 , and a linkage to a poly(alkylene oxide) moiety, wherein Z is optionally present.