Patent ID: 8420763

Claim:
A fluorooxyalkylene group-containing polymer composition comprising a fluorooxyalkylene group-containing polymer having a hydrolyzable group at one terminal and a fluorooxyalkylene group-containing polymer having hydrolyzable groups at both terminals wherein the fluorooxyalkylene group-containing polymers are represented by the following formula (1): A-Rf 1 -B (1) wherein Rf 1 is a divalent linear fluorooxyalkylene group having 5 to 100 repeating units represented by —C d F 2d O—, wherein d is, independently of each other, an integer of from 1 to 6; and A and B are, independently of each other, an Rf 2 group, wherein Rf 2 is selected from the group consisting of F, H and a monovalent fluorinated group having a CF 3 or CF 2 H group at the terminal, or a group represented by the following formula (2) wherein Q is a divalent organic group, Z is a divalent to septivalent organopolysiloxane group having a siloxane bond, which is a linear or cyclic organopolysiloxane moiety having 2 to 5 silicon atoms, R is an alkyl group having 1 to 4 carbon atoms or a phenyl group, X is a hydrolyzable group, a is 2 or 3, and b is an integer of from 1 to 6, c is an integer of from 1 to 5, and β is 1; wherein the terminal Rf 2 group accounts for 30 to 75 mole %, relative to a total of all of the terminal groups in the composition.