Title:
METHOD FOR ESTERIFYING POLYVINYL ALCOHOL RESIN, MODIFIED POLYVINYL ALCOHOL RESIN OBTAINED BY SUCH METHOD, AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2007/023762
Kind Code:
A1
Abstract:
Disclosed is a method wherein a polyvinyl alcohol resin is esterified by an esterification reaction using an esterifying agent. This method for esterifying a polyvinyl alcohol resin is characterized in that a vinyl ester is used as the esterifying agent. This method enables to esterify a polyvinyl alcohol resin at high reaction rate under mild reaction conditions with comparatively simple reaction facility. In addition, this method is applicable to wide range of polyvinyl alcohol resins without being limited by polymerization degree or saponification degree of the polyvinyl alcohol resins. Consequently, there can be obtained a modified polyvinyl alcohol resin which is excellent in physical properties such as polymerization degree and modification degree, and suitable for wide applications.
Inventors:
NITTA, Daisuke (11-1, Chikko Shinmachi 3-cho, Nishi-ku, Sakai-sh, Osaka 31, 5928331, JP)
Application Number:
JP2006/316314
Publication Date:
March 01, 2007
Filing Date:
August 21, 2006
Export Citation:
Assignee:
JAPAN VAM & POVAL CO., LTD. (11-1, Chikko Shinmachi 3-cho Nishi-k, Sakai-shi Osaka 31, 5928331, JP)
日本酢ビ・ポバール株式会社 (〒31 大阪府堺市西区築港新町３丁１１番地１ Osaka, 5928331, JP)
日本酢ビ・ポバール株式会社 (〒31 大阪府堺市西区築港新町３丁１１番地１ Osaka, 5928331, JP)
International Classes:
C08F8/14; C08F16/06
Attorney, Agent or Firm:
IWATANI, Ryo (ORIX Dojima Bldg. 3F, 1-31 Dojima 2-chome, Kita-k, Osaka-shi Osaka 03, 5300003, JP)