Hamre, Schumann, Mueller & Larson, P.C.
Polyvinyl acetal-based resin
The present invention provides a polyvinyl acetal-based resin which has a high elastic modulus, is excellent in solubility to an alcoholic solvent, and gives a highly transparent alcohol solution. The polyvinyl acetal-based resin is obtained by acetalizing a polyvinyl alcohol-based resin (A) which has 0.1 to 1.5% by mol of a 1,2-diol structural unit represented by the following general formula (1) and a degree of saponification of 98.5% by mol or more:wherein R1, R2, and R3 each independently represents a hydrogen atom or an organic group; X represents a single bond or a bonding chain; and R4, R5, and R6 each independently represents a hydrogen atom or an organic group.
The Nippon Synthetic Chemical Industry Co., Ltd.
C C C
C08F C08F C08F
additional inventional inventional
Masahiro Mitsuo
Saito Shibutani