Patent ID: 6835804
Filing Date: 2004-12-28
Classification: C08F,G03F

Abstract:
A method for preparing a polymer comprising recurring units of the following general formula (2) and having a weight average molecular weight (Mw) of about 1,000 to 500,000 and a molecular weight dispersity (Mw/Mn) of 1.0 to 1.3, said method comprising the step of effecting deblocking reaction on a polymer comprising recurring units of the following general formula (1) and having a weight average molecular weight (Mw) of about 1,000 to 500,000 and a molecular weight dispersity (Mw/Mn) of 1.0 to 1.3 in the presence of an acid catalyst, wherein R1 and R4 each are hydrogen or methyl,R2 and R3 each are a straight or branched alkyl group of 1 to 10 carbon toms, or R2 and R3, taken together, may form a ring, R5 is hydrogen, a hydroxyl group, straight or branched alkyl group having 1 to 10 carbon atoms, substitutable alkoxy group having 1 to 10 carbon atoms, halogen atom or acid labile group, R6 and R7 each are hydrogen, a methyl group, alkoxycarbonyl group having 2 to 10 carbon atoms, cyano group or halogen atom, R8 is a tertiary alkyl group of 4 to 20 carbon atoms, n is 0 or a positive integer of 1 to 4, p is a positive number, q and r each are 0 or a positive number, q and r are not equal to 0 at the same time, p1 is a positive number, p2 is 0 or a positive number, and p1+p2=p.