Patent ID: 6692887
Filing Date: 2004-02-17
Classification: C08G,C08L,G03F,Y10S

Abstract:
A copolymer comprising a structure having the formula (I): wherein n is 0 or 1, A and B represent independently a hydrogen atom, a halogen atom, a monovalent hydrocarbon group having 1 to 10 carbon atoms or a monovalent halogenated hydrocarbon group having 1 to 10 carbon atoms, and X and Y represent independently a hydrogen atom, a halogen atom, a monovalent hydrocarbon group having 1 to 10 carbon atoms, a monovalent halogenated hydrocarbon group having 1 to 10 carbon atoms or an acid-cleavable group, provided that at least one of X and Y is an acid-cleavable group, or X and Y are bonded to each other to form a bivalent group represented by the formula: wherein Z is â€”Oâ€” or â€”N(R3)â€” in which R3 is a hydrogen atom, a halogen atom, an alkyl group having 1 to 8 carbon atoms or a â€”SO2R4 group having 1 to 4 carbon atoms in which R4 is an alkyl group having 1 to 4 carbon atoms or a halogenated alkyl group having 1 to 4 carbon atoms, or the formula: â€”Oâ€”.