Light insolubilizing polyvinyl alcohol derivative and its preparation

Abstract

Abstract PURPOSE:The titled derivative, prepared by reacting polyvinyl acetate with a specific aldehyde derivative, capable of exhibiting a high sensitivity even with a low content of photosensitive functional groups, and suitable for photoresists, etc. CONSTITUTION:A light insolubilizing polyvinyl alcohol derivative, expressed by formula III[R1 is H or acetyl; (k) and (l) are natural numbers]or formula IV [(m) is a natural number], and prepared by reacting (A) a completely or partially saponified polyvinyl acetate having 200-3,000 average polymerization degree with (B) 0.1-30mol%, based on one vinyl alcoholic unit in the component (A), aldehyde, obtained by reacting cinnamoyl chloride with aminoacetaldehyde dimethyl acetal, etc., and expressed by formulaI[R is alkylene or phenylene; X is O or imino; (n) is 1 or 2], e.g. 2,2-dimethoxyethyl cinnamide, or an acetal derivative thereof, in the presence of an acidic catalyst, e.g. phosphoric acid, to give the repeating units of the component (A) partially substituted by the units expressed by formula II.

Inventors

• 👤 Hachiro Nakanishi
• 👤 八郎 中西
• 👤 Kunihiro Ichimura
• 👤 市村　国宏
• 👤 Norinaga Fujishige
• 👤 昇永 藤重
• 👤 Masao Kato
• 👤 加藤　政雄
• 👤 Tetsuo Ito
• 👤 哲夫 伊藤

Bibliographic Details