Invention Grant
- Patent Title: Polyvinyl alcohol esterification in n-methyl-2-pyrrolidone
- Patent Title (中): N-甲基-2-吡咯烷酮中的聚乙烯醇精制
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Application No.: US3679649DApplication Date: 1969-12-29
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Publication No.: US3679649APublication Date: 1972-07-25
- Inventor: FREYERMUTH HARLAN B , FIELD NATHAN D
- Applicant: GAF CORP
- Assignee: GAF Chemicals Corp
- Current Assignee: GAF Chemicals Corp
- Priority: US88881669 1969-12-29
- Main IPC: C08F8/14
- IPC: C08F8/14 ; C08F27/12
Abstract:
A PROCESS OF ESTERIFYING POLYVINYL ALCOHOL USING NMETHYL-2-PYRROLIDONE AS A SOLVENT IS DISCLOSED.
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