Patent ID: 6525152
Filing Date: 2003-02-25
Classification: C08F,G03F

Abstract:
A copolymer comprising the units A, B and C wherein unit A is present in an amount of 5 to a maximum of 50 mol % and has the following formula: wherein R1 and R4 are selected such that the homopolymer of A is alkali-soluble, unit B is present in an amount of 20-70 mol % and has the following formula: wherein R2, R6 and R7 are selected such that the homopolymer of B has a glass transition temperature above 100Â° C., and unit C is present in an amount of 10-50 mol % and has the following formula: wherein R3 and R5 are selected such that the homopolymer of C is water-soluble,with the proviso that unit C is different from unit A.