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    • 50. 发明授权
    • Process of making films, fibers or other shaped articles consisting of,
or containing, polyhydroxy polymers
    • 制造由多羟基聚合物组成或含有多羟基聚合物的薄膜,纤维或其它成型制品的方法
    • US4419316A
    • 1983-12-06
    • US201806
    • 1980-10-29
    • Richard G. Schweiger
    • Richard G. Schweiger
    • C07C203/00C07C203/04C08B5/00C08B5/02C08B5/14C08B31/06C08B37/00C08F8/30C08F8/36C08F8/42D01F11/02C08L1/16C08L5/00D01F11/04
    • C07C201/02C07C201/04C08B31/06C08B37/00C08B5/00C08B5/02C08B5/14C08F8/44
    • A process of preparing film, fibers and other shaped articles by nitrosating a polyhydroxy polymer in a reaction medium containing a solubilizing agent for the resulting polyhydroxy polymer nitrite ester and a suitable proton acceptor, bringing the reaction mixture into the desired shape and regenerating and separating the polyhydroxy polymer by contact with a protic solvent in the presence of an acid catalyst. The polyhydroxy polymer may be a polyvinyl alcohol, cellulose or other polysaccharide, and mixtures thereof. Also dissolved in the reaction medium may be an organic solvent soluble polymer substantially lacking hydroxyl groups. If mixtures of polyhydroxy polymers or of polyhydroxy polymers lacking hydroxyl groups and organic solvent soluble polymers are employed the resulting films, fibers or other shaped articles consist of homogeneous and intimate mixtures of all the polymers originally present in solution. Solutions containing polyhydroxy polymer nitrite ester or a mixture of polyhydroxy polymer nitrite ester and organic solvent soluble polymer lacking hydroxyl groups in an anhydrous medium containing a highly polar aprotic solvent or a weak tertiary amine base or both are disclosed.
    • 通过在含有所得多羟基聚合物亚硝酸酯的增溶剂和合适的质子受体的反应介质中亚硝化多羟基聚合物来制备膜,纤维和其它成形制品的方法,使反应混合物成为所需形状,再生和分离 多羟基聚合物与质子溶剂在酸催化剂存在下接触。 多羟基聚合物可以是聚乙烯醇,纤维素或其它多糖,以及它们的混合物。 也溶解在反应介质中的可以是基本上不含羟基的有机溶剂可溶性聚合物。 如果使用多羟基聚合物或缺乏羟基和有机溶剂可溶性聚合物的多羟基聚合物的混合物,则所得到的膜,纤维或其它成型制品由溶液中最初存在的所有聚合物的均匀和紧密的混合物组成。 公开了含有多羟基聚合物亚硝酸酯或多羟基聚合物亚硝酸酯和在含有高极性非质子溶剂或弱叔胺碱的两者的无水介质中缺少羟基的有机溶剂可溶性聚合物的混合物的溶液。