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    • 41. 发明公开
    • MODIFIED VINYL ALCOHOL POLYMER SOLUTION AND METHOD FOR PRODUCING SAME
    • 改性葡萄糖醇聚合物
    • EP2687560A1
    • 2014-01-22
    • EP12758259.1
    • 2012-03-14
    • Kuraray Co., Ltd.
    • NII ShinsukeNAKAMAE MasatoTAOKA Yuta
    • C08L29/04C08F216/06C08F220/56
    • C08L29/04C08F8/12C08F216/06C09D129/04C08F218/08C08F220/54C08F220/58
    • An object of the present invention is to provide a modified PVA solution that enables physical properties such as viscosity to be adjusted even when a concentration of the modified PVA having high hydrophobicity is increased, and to provide a method for producing the modified PVA solution.
      The modified vinyl alcohol polymer solution of the present invention comprises: a modified vinyl alcohol polymer; an organic solvent; and water, the modified vinyl alcohol polymer: comprising a monomer unit having an alkyl group having a carbon number of 2 or greater and 29 or less;, and having a percentage content of the monomer unit being no less than 0.05 mol% and no greater than 5 mol%, and a degree of saponification of the modified vinyl alcohol polymer being no less than 20 mol% and no greater than 99.99 mol%, and in terms of Hansen solubility parameters of the organic solvent, δd being no less than 13 MPa 0.5 and no greater than 18 MPa 0.5 , δp being no less than 4 MPa 0.5 and no greater than 9 MPa 0.5 , and δh being no less than 9 MPa 0.5 and no greater than 13 MPa 0.5 .
    • 本发明的目的在于提供即使在提高疏水性高的改性PVA的浓度的情况下也能够调节粘度等物性的改性PVA溶液,提供改性PVA溶液的制造方法。 本发明的改性乙烯醇聚合物溶液包含:改性乙烯醇聚合物; 有机溶剂; 和水,所述改性乙烯醇聚合物:包含具有碳原子数2以上且29以下的烷基的单体单元,所述单体单元的含有百分比为0.05摩尔%以上且不大于 5摩尔%以上,改性乙烯醇系聚合物的皂化度为20摩尔%以上且99.99摩尔%以下,以有机溶剂的Hansen溶解度参数计,不小于13 MPa 0.5以上18MPa以下0.5以上,p为4MPa以上0.5MPa以下9MPa以下0.5以下,h为9MPa以上且13MPa以下0.5以下。