METHOD FOR UNDERCOATING FILM FOR PHOTOSENSITIVE MATERIAL

摘要

PURPOSE:To form directly a hydrophilic colloidal layer on the surface of a film by mixing an aqueous dispersion of a copolymer consisting of a specified amount of styrene and/or a styrene deriv. and a specified amount of an acrylate with a compound having two or more epoxy groups in one molecule to prepare a coating liq. and by coating the liq. on the surface of the film. CONSTITUTION:An aqueous dispersion of a copolymer consisting of 100-60wt% styrene and/or styrene deriv. respresented by the formula (where R is H or alkyl) and an acrylate represented by a formula CH2=CH2R (where R is alkyl) is mixed with a compound having two or more epoxy groups in one molecule to prepare a coating liq. This coating liq. is coated on a film support for a photosensitive material. The amount of the acrylate can be arbitrarily selected within the range of 10-60wt% styrene and/or styrene deriv. content, yet the desired amount is 20-50wt%. The kind of the acrylate can be arbitrarily selected.