| 摘要 |
PURPOSE:To eliminate the need for a drying stage by incorporating a specific polymerizable monomer and photopolymn. initiator into a PVA copolymer obtd. by saponifying a copolymer of vinyl ester and ionic hydrophilic group- contg. polymerizable monomer. CONSTITUTION:The polymerizable monomer having the compd. expressed by formula I and having at least two free hydroxyl groups and the photopolymn. initiator are incorporated into the water soluble or water dispersible PVA copolymer which is obtd. by saponifying the copolymer of 90-99mol.% vinyl ester and 0.1-10mol.% ionic hydrophilic group-contg. polymerizable monomer with a vinyl ester unit and has 50-70mol.% degree of saponification and 60-130 deg.C hot melt flow initiation temp. In formula, R1, R3 and R4 are respectively the same and different and denote a hydrogen atom or methyl group, R2 denotes an alkylene group of 1-5C having a hydroxyl group, R5 denotes an alkyl group of 1-5C having a hydroxyl group, (n) denotes 4-23 integer, (m) denotes 0 or 1 and (p) denotes 1-5 integer. |
