| 摘要 |
PURPOSE:To obtain the titled composition composed of a completely or partially saponified polyvinyl acetate and having an excellent thermal stability by incorpo rating a polymer contg. three specific monomers to the titled composition. CONSTITUTION:The polymer comprises 100pts.wt. above described polyvinyl acetate having 50-100mol% saponification value, 20-300pts.wt. photopolyme rizable unsatd. compd. having an ethylenical double bond in a molecule, and 0.001-1wt% N-nitrosohydroxylamine deriv. shown by the formula, on the weight basis of the polymer in the formula, R is 1-18C aliphatic, alicyclic, cycloaliphatic and aromatic hydrocarbon residues which may be substituted with a halogen atom, a hydroxyl, or a cyano group, X is a hydrogen atom, a metal belonging to 1-3 a main or a sub group in a periodic table, an 8 sub group in said table or an ammonium radical which may be substd., (n) is 1-5, and satisfies a positive electric charge. The titled composition having the above described characteristics is obtd. by applying the prescribed polymer to the titled composition. |
