Nitrogen → HCID 86742155, compound

Participants

Reaction Steps

172.2 g (2.00 moles) of vinyl acetate, 15.1 g (0.15 mole) of n-butyl vinyl ether, 56.2 g of methanol and 0.28 g of 2,2'-azobis-2,4-dimethylvaleronitrile were mixed and polymerized in an atmosphere of N2 at 62° C. for 8 hours. Subsequently, 749.2 g of 5% water-containing methanol and 8.0 g (0.20 mole) of caustic soda were added to the reaction product for saponification at 45° C. for 2 hours. The reaction mixture was milled and filtered to obtain a polymer portion, followed by washing with 5% water-containing alcohol to eliminate impurities such as sodium acetate therefrom. The purified polymer was dried under reduced pressure and milled to obtain 82.5 g of a white powdery vinyl alcohol/n-butyl vinyl ether (93/7 by molar ratio) copolymer (hereinafter referred to as PVA/n-BVE).

Provenance & Evidence