The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 22, 2015
Filed:
Apr. 04, 2007
Mitsuo Shibutani, Osaka, JP;
Masahiro Saito, Osaka, JP;
Mitsuo Shibutani, Osaka, JP;
Masahiro Saito, Osaka, JP;
The Nippon Synthetic Chemical Industry Co., Ltd., Osaka, JP;
Abstract
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 R, R, and Reach independently represents a hydrogen atom or an organic group; X represents a single bond or a bonding chain; and R, R, and Reach independently represents a hydrogen atom or an organic group.