| abstract |
PURPOSE: To enhance sensitivity and strength of adhesion, to screen, of a film hardened by exposure by incorporating a film-forming polymer, a photo-crosslinkable PVA, and a diazo compd. n CONSTITUTION: The photo-crosslinkable PVA is obtained by introducing photo- crosslinkable structural units represented by formulae I, II, or III in PVA, derived from full or partial saponification of polyvinyl acetate. A preferable diazo compd. to be used here is a diazo resin produced by condensation of 4-diazophenylamino and p-formaldehyde. A preferable mixing ratio of the film-forming polymer to said PVA 100:(10W200) parts by weight. A preferable mixing weight ratio of the diazo compd. to the total weight of said polymer and PVA is 100: (0.01W2) parts by weight. n COPYRIGHT: (C)1986,JPO&Japio |