Image receptor element containing as a mordant a cross linked reaction product of a water soluble cationic polymer with glycidyl groups

Abstract From the Canadian patent

A suitable mordaning polymer for the image receiving layer in a color photographic material for the dye diffusion transfer process is a water-soluble cationic polymer containing glycidyl groups. Such polymers can be made by quaternizing a basic polyurethane polyurea, or polyurea polyurethane of the formula - - A - B - -, with a quaternizing agent capable of introducing glycidyl groups. The recurring unit contains a quaternizable tertiary amino group, and the recurring unit B is derived from a bis-chloroformate or a diisocyanate.