Patent ID: 8937129
Filing Date: 2015-01-20
Classification: C08F,C08L,C09D

Abstract:
1. A triblock copolymer composition, wherein the block copolymer contains a polymeric A block, a polymeric B block, and a polymeric A′ block: wherein (a) the polymeric A block is of polymerized ethylenically unsaturated monomer(s) having 1 to 20 carbon atoms, said ethylenically unsaturated monomer(s) consisting of non-functional monomers and monomers having one or more interactive functional groups; (b) the polymeric B block is of a polymerized ethylenically unsaturated monomer(s) having 1 to 20 carbon atoms, said ethylenically unsaturated monomer(s) consisting essentially of non-functional monomers; and (c) the polymeric A′ block is of polymerized ethylenically unsaturated monomer(s) having 1 to 20 carbon atoms, said ethylenically unsaturated monomer(s) consisting of non-functional monomers and monomers having one or more interactive functional groups; and further wherein the A and A′ blocks have a similar composition such that at least two of a monomer set, monomer ratio, type of functional groups, or concentration of functional groups differs between the A block and the A′ block, and the B block has a different composition from the A and A′ blocks; the A and A′ blocks differ from the B block by the presence, in said A and A′ blocks, of one or more interactive functional groups for the formation of a reversible network, wherein the B-block is a non-functional block and essentially free of said interactive functional groups; the interactive functional groups of the A block comprise each of a primary hydroxyl group, a urea group, and an ethylene oxide group; the interactive function groups of the A′ block comprise each of a carboxylic acid group and a hydroxyl group; each individual block of the block copolymer contains at least 90 mole percent of polymerized methacrylic monomers or mixtures thereof; and at least 1% by weight of the monomers used to form the A and A′ blocks contain said interactive functional groups.