Patent ID: 6566038
Filing Date: 2003-05-20
Classification: C08F,G03F,Y10S

Abstract:
A polymer comprising units of formula (1) and units of formula (2) and having a weight average molecular weight of 1,000 to 500,000, whereinR1 is hydrogen, methyl or CH2CO2R3, R2 is hydrogen, methyl or CO2R3, R3 is a straight, branched or cyclic alkyl group of 1 to 15 carbon atoms, R4 is a halogen atom or an acyloxy, alkoxycarbonyloxy or alkylsulfonyloxy group of 1 to 15 carbon atoms in which some or all of the hydrogen atoms on the constituent carbon atoms may be substituted with halogen atoms, R5 is hydrogen or a straight, branched or cyclic alkyl group of 1 to 10 carbon atoms, R6 is an acid labile group, Z is a single bond or a divalent straight, branched or cyclic hydrocarbon group of 1 to 10 carbon atoms, k is 0 or 1, W is â€”Oâ€” or â€”(NR)â€”, and R is hydrogen or a straight, branched or cyclic alkyl group of 1 to 15 carbon atoms, wherein R6 selected from formulae (L1) to (L4), trialkylsilyl groups in which each alkyl moiety has 1 to 6 carbon atoms, and oxoalkyl groups of 4 to 20 carbon atoms wherein broken line in each case denote a valence bond, RL01 and RL02 are hydrogen or straight, branched or cyclic alkyl groups of 1 to 18 carbon atoms, or a pair of RL01 and RL02, RL01 and RL03, or RL02 and RL03 may form a ring in which each of RL01, RL02, and RL03 is a straight or branched alkylene group of 1 to 18 carbon atoms when they form a ring, RL04 is a tertiary alkyl group of 4 to 20 carbon atoms, RL05 is a straight or branched alkyl group of 1 to 8 carbon atoms or a substituted or unsubstituted aryl group of 6 to 20 carbon atoms, RL06 is a straight, branched or cyclic alkyl group of 1 to 8 carbon atoms or a substituted or unsubstituted aryl group of 6 to 20 carbon atoms, RL07 to RL16 independently represent hydrogen or monovalent hydrocarbon groups of 1 to 15 carbon atoms which may contain a hetero atom, or a pair of RL07 and RL08, RL07 and RL09, RL08 and RL10, RL09 and RL10, RL11 and RL12, RL13 and RL14, may form a ring in which each of RL07 to RL16 represents a divalent C1-C15 hydrocarbon group which may contain a hetero atom, when they form a ring, or RL07 and RL09, RL09 and RL15, RL13 and RL15, may bond together directly to form a double bond.