Patent ID: 8742154

Claim:
A linear tri-block copolymer represented by the average formula (1): ABA (1) wherein A is a polyalkyleneoxide unit or an aliphatic modified polyalkyleneoxide unit both of the general formula: R 5 (C a H 2a O) d Y and wherein B is an internal polysiloxane unit of the general formula: [X(C a H 2a O) b R 2 [SiO(R 1 ) 2 ] c Si(R 1 ) 2 R 2 (OC a H 2a ) b X] wherein R 1 is an alkyl containing from 1 to 4 carbon atoms, R 2 is a divalent organic moiety containing from 1 to 30 carbon atoms, each a in unit A and unit B is independently an integer of from 2 to 4, each b is independently 0 or an integer of from 1 to 100, c is an integer of from 1 to 1000, R 5 is of the formula (C n H 2n+1 )— with n=1-30, or of the formula (C n H 2n−1 )— with n=2-30, or of the formula (C n H 2n+3 )— with n=4-30, d is an integer of from 1 to 100, provided that the sum of all the b values and the d value is an integer of from 1 to 100, X and Y are divalent organic groups selected from a secondary amine, a tertiary amine and a ring-opened epoxide, such that when X is a ring-opened epoxide, Y is a secondary or tertiary amine, and when Y is a ring-opened epoxide, X is a secondary or tertiary amine.