ACRYLONITRILE COPOLYMERS AND PROTECTIVE OVERCOATS FOR PHOTOGRAPHIC ELEMENTS

摘要

-i- NOVEL ACRYLONITRILE COPOLYMERS AND PROTECTIVE OVERCOATS FOR PHOTOGRAPHIC ELEMENTS Novel polymers having the structure < IMG > and < IMG > ; wherein A represents a polymerized acrylonitrile monomer; B represents a polymerized hydrophobic ethylenically unsaturated monomer; C represents a polymerized cationically charged vinylidene monomer; x is from 10 to 90 weight percent; y is from 5 to 40 weight percent except that when B is a vinylidene halide monomer, y is 10 to 89.9 weight percent; and z is from 0.1 to 10 weight percent The polymers are useful in forming protective overcoats for photographic elements.