Patent ID: 6384169
Filing Date: 2002-05-07
Classification: C08F,G03F,Y10S

Abstract:
A styrene polymer represented by the following general formula (1), terminated with P, and having a weight average molecular weight of 1,000 to 500,000, wherein R is hydroxyl or OR3 groups, at least one of R groups being hydroxyl, R1 is hydrogen or methyl, R2 is a normal, branched or cyclic alkyl group of 1 to 30 carbon atoms, R3 is an acid labile group, letter x is 0 or a positive integer, y is a positive integer, satisfying x+y&lE;5, k is 0 or a positive integer, m is 0 or a positive integer, n is a positive integer, satisfying k+m+n&lE;5, p and q are positive numbers satisfying 03 groups may be the same or different when n is at least 2, &Dgr;&lE; is such a number that the polymer may have a weight average molecular weight of 1,000 to 500,000, P is normal, branched or cyclic alkyl or alkenyl groups of 1 to 30 carbon atoms, aromatic hydrocarbon groups of 6 to 50 carbon atoms, or groups of the following general formula (2), (3) or (4), â€ƒâ€”R4&Parenopenst;OH)râ€ƒâ€ƒ(3)â€”R4â€”(OR5a)râ€ƒâ€ƒ(4) wherein R4 is (r+1)-valence aliphatic hydrocarbon groups or alicyclic saturated hydrocarbon groups of 1 to 30 carbon atoms, or aromatic hydrocarbon groups of 6 to 50 carbon atoms, R5 is normal, branched or cyclic alkyl groups of 1 to 30 carbon atoms, aromatic hydrocarbon groups of 6 to 50 carbon atoms, alkoxy groups of 1 to 30 carbon atoms, or hydroxyl, R5a is normal, branched or cyclic alkyl groups of 1 to 30 carbon atoms or aromatic hydrocarbon groups of 6 to 50 carbon atoms, letter h is 0 or 1, and letter r is a positive integer of 1 to 3, wherein the polymer of formula (1) may be crosslinked within a molecule and/or between molecules with a crosslinking group having a Câ€”Oâ€”C linkage resulting from reaction of at least one of the phenolic hydroxyl groups represented by R in formula (1), the hydroxyl groups represented by R5 in formula (2), and the hydroxyl groups in formula (3) with an alkenyl ether compound or halogenated alkyl ether compound, and the amount of the acid labile group and the crosslinking group combined is on the average from more than 0 mol % to 80 mol % of the entirety of hydrogen atoms in the phenolic hydroxyl groups in formula (1), the hydroxyl groups represented by R5 in formula (2), and the hydroxyl groups in formula (3).