POLYVINYL ALCOHOL HAVING 1,2-GLYCOL BOND IN SIDE CHAIN AND PROCESS FOR PRODUCING THE SAME

Title:

POLYVINYL ALCOHOL HAVING 1,2-GLYCOL BOND IN SIDE CHAIN AND PROCESS FOR PRODUCING THE SAME

Document Type and Number:

WIPO Patent Application WO/2006/018870

Kind Code:

A1

Abstract:

A polyvinyl alcohol having 1,2-glycol bonds in side chains. It has the following and other features. During the production thereof, dimethyl carbonate or the like is not generated. The step of recovery from the waste liquid resulting from saponification does not necessitate a step for dimethyl carbonate removal. Even when 1,2-glycol bonds are incorporated in an increased amount, the copolymer (paste) before saponification has intact solubility in a saponification solution (methanol). The polyvinyl alcohol suffers no decrease in water solubility even after it has undergone a heat history. The polyvinyl alcohol having 1,2-glycol bonds in side chains is obtained by saponifying a copolymer of a vinyl ester monomer with a compound represented by the formula (1).

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Inventors:

SHIBUTANI MITSUO (JP)

Application Number:

PCT/JP2004/011834

Publication Date:

February 23, 2006

Filing Date:

August 18, 2004

Export Citation:

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Assignee:

NIPPON SYNTHETIC CHEM IND (JP)
SHIBUTANI MITSUO (JP)

International Classes:

C08F216/06; C08F8/12; (IPC1-7): C08F216/06; C08F8/12

Foreign References:

JP2004285143A	2004-10-14
JP2000313721A	2000-11-14
JP2002241433A	2002-08-28

Other References: