Title:
MANUFACTURING METHOD OF POLYVINYL ACETAL RESIN, AND POLYVINYL BUTYRAL RESIN
Document Type and Number:
Japanese Patent JP2005002285
Kind Code:
A
Abstract:
To provide a manufacturing method of a polyvinyl acetal which permits the manufacture of a polyvinyl acetal resin having a high degree of acetalization though using no catalyst without causing deterioration such as scission of the main chain, discoloration of the resin, or the like, and a polyvinyl butyral resin, manufactured by the manufacturing method of the polyvinyl acetal, suitably employable particularly for an interlayer film for a laminated glass or the like.
The manufacturing method of the polyvinyl acetal resin comprises pressurizing a solution or a suspension containing the polyvinyl alcohol resin and a carbonyl compound.
Inventors:
TADA TOSHIO
NISHIMURA YOHEI
TOYOSHIMA KATSUNORI
NISHIMURA YOHEI
TOYOSHIMA KATSUNORI
Application Number:
JP2003169847A
Publication Date:
January 06, 2005
Filing Date:
June 13, 2003
Export Citation:
Assignee:
SEKISUI CHEMICAL CO LTD
International Classes:
C08F8/28; (IPC1-7): C08F8/28
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