Patent ID: 6710150
Filing Date: 2004-03-23
Classification: C08F,G03F

Abstract:
A protolytically leaving group-containing copolymer represented by the following general formula (1): in the formula, R1, R2 and R3 are the same or different and each represents a protolytically leaving group which may be sustituted or unsubstituted and is selected from the group consisting of t-butyl, isopropyl, cyclic residues of alicyclic compounds of the general formula CnH2n, wherein n is an integer of not less than 3, groups derived from spiro compounds, heteroatom containing functional groups, isobornyl groups, adamantly groups, merhyladamantyl groups, terpene ring containing substituents, derived from norborny ring, bornene ring, menthyl ring, menthane ring, camphor ring, isocamphor ring, sesquiterpene ring, santone ring, diterpene ring, triterpene ring, thujane, sabinene, thujone, carane, careen, pinane, norpinane, bornane, camphene, tricyclene, groups derived from cholesteric ring, bile acid, digitaloids and steroid saponins, and a, b and c represent mole % of repeating units (A), (B) and (C), respectively, in the copolymer,which comprises the repeating unit (A) as well as the repeating unit (B) and/or the repeating unit (C) and has a weight average molecular weight of 2000Ëœ30000, said a, b and c satisfying the condition that a is 5 to 30 mole % and (b+c) is 70 to 95 mole %.