| 摘要 |
PURPOSE:A novel polyvinyl alcohol based polymer, containing a specific fluorine- containing monomer units, having improved water and oil repellency and specific dissolving characteristics originating from the association between the fluorine- containing groups, and useful as a surface treating agent, etc. CONSTITUTION:A polymer, obtained by copolymerizing a fluorine-containing monomer with a vinyl ester, e.g. vinyl acetate, and saponifying the resultant copolymer, and containing preferable 0.02-5mol% one or more of fluorine- containing monomer units expressed by formulas I-VII (R<1>-R<4> are H, 1-20C alkyl, allyl or aralkyl; M is alkali metal salt or ammonium salt group; Rf is fluorine-containing group; X is linking group; m is 0 or 1).
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