Patent ID: 6365643
Filing Date: 2002-04-02
Classification: C08F,G03F

Abstract:
A cationic photoinitiator of the formula IV[R1â€”Iâ€”R2]+Xâˆ’â€ƒâ€ƒ(IV) where I is the element iodine,Xâˆ’ is the anion of a complex metal salt or of a strong acid, R1 is a radical â€ƒin which Ar is a monovalent aromatic hydrocarbon radical or is a monovalent aromatic hydrocarbon radical containing at least one oxygen and/or sulfur atom, a is 1,2 or 3, b is 0, 1 or 2, c is 0, 1 or 2, D, E and F are each substituents of Ar, D being a radical â€ƒwhere x is 0 or 1, y is 0 or 1, R is a linear or branched divalent hydrocarbon radical, which is optionally interrupted by at least one oxygen atom, sulfur atom and/or carboxyl group, Ra, Rb and Rc each independently are selected from the group consisting of monovalent alkyl, aryl, haloalkyl and alkoxy radicals, E is a radical â€”Oâ€”Rd, F is a radical â€”Re, R2 is a radical where Rd is a monovalent hydrocarbon radical, which is optionally interrupted by at least one oxygen atom, Re is a monovalent hydrocarbon radical, which is optionally interrupted by at least one oxygen atom, f is 0, 1 or 2, and g is 0, 1 or 2.