Patent ID: 7087710

Claim:
A block copolymer composition, comprising: at least one polyfluorooxetane block bonded to a polyether block via an ether linkage, said polyfluorooxetane block having a repeat unit of the formula wherein each n is, independently, 1 to about 6, wherein R is hydrogen or an alkyl group having from 1 to 6 carbon atoms, and wherein each R f is, independently, a linear or branched alkyl group of from 1 to about 20 carbon atoms with a minimum of 50% of the hydrogen atoms of said R f alkyl group being replaced by F, and optionally up to all of the remaining H atoms being replaced by I, Cl, or Br, or each said R f group, where DP is from 2 to about 100; and wherein said polyether block has ether repeat units that include from 2 to about 6 carbon atoms per repeat unit, and wherein the number average molecular weight of said polyether block is from about 250 to about 10,000.