Patent ID: 6790908
Filing Date: 2004-09-14
Classification: C08F,C08L,C09J

Abstract:
A block copolymer, being a diblock (block A)-(bloc B) copolymer, a triblock (block A)-(block B)-(block A), or a triblock (block A)-(block B)-(block C) copolymer,block A being a stiff block, comprising at least 55% of repetitive units deriving from a stiff monomer selected from the group consisting of styrene, isobornyl acrylate, and isobornylmethacrylate, block B being a soft block, comprising at least 55% of repetitive units deriving from a soft monomer selected from the group consisting of esters of acrylic acid, esters of methacrylic acid, and mixtures thereof, block C being a stiff block, comprising repetitive units deriving from a stiff monomer selected from the group consisting of styrene, isobornyl acrylate, and isobornylmethacrylate, wherein: block A comprises at least 6% by weight of units deriving from a block A segregation monomer selected from the group consisting of acrylic acid, methacrylic acid, acrylonitrile, methacrylonitrile, 2-vinylpyridine, and 4-vinylpyrridine, or block B comprises at least 6% by weight of units deriving from a block B segregation monomer selected from the group consisting of acrylic acid, methacrylic acid, acrylonitrile, methacrylonitrile, and vinylpyrrolidones, and the block copolymer has a molecular weight of more than 10,000 g/mol.