Copolymers of 4-hydroxystyrene and alkyl...

C - Chemistry – Metallurgy – 08 – F

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96/172, 402/361

C08F 16/10 (2006.01) C08F 8/10 (2006.01) C08F 212/14 (2006.01) G03F 7/004 (2006.01) G03F 7/023 (2006.01) G03F 7/039 (2006.01)

Patent

CA 2000710

Abstract A copolymer of (a) an unsubstituted 4-hydroxystyrene monomer and (b) a substituted 4-hydroxystyrene monomer of the formula Image wherein A, B, C, and D are independently H or C1 to C3 alkyl and wherein at least one of A, B, C and D is C1 to C3 alkyl; and wherein said copolymer has a molecular weight of from about 800 to about 100,000; and wherein the mol ratio of monomer (a) to monomer (b) ranges from about 3:1 to about 1:3.

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