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    • 10. 发明授权
    • Method of preparing aromatic polyamide solutions
    • 制备芳族聚酰胺溶液的方法
    • US3963664A
    • 1976-06-15
    • US576661
    • 1975-05-12
    • Shuji OzawaAkihiro AokiHiroshi Fujie
    • Shuji OzawaAkihiro AokiHiroshi Fujie
    • C08J3/09C08K5/34
    • C08J3/096C08K5/34C08J2377/10
    • A method of preparing a homogeneous solution of a polymer whose recurring structural units are predominantly metaphenylene isophthalamide units, comprising:A. blending at a temperature of from -20.degree.C to 10.degree.C,1. a fiber-forming polymer in which at least 90 mol percent of the total recurring structural units are metaphenylene isophthalamide units, and2. a solvent consisting of at least 80% by weight N-methyl-2-pyrrolidone,In the substantial absence of inorganic salts and at a polymer concentration of from 15 to 30 percent by weight based on the total weight of the polymer and the solvent, to form a uniform slurry, andB. heating the slurry to a temperature between T.sub.1 and T.sub.2 but not higher than 130.degree.C, thus forming the solution;whereinT.sub.1 = -18 + 3C - 1.5X,andT.sub.2 = 330 - 10C + 7X,both T.sub.1 and T.sub.2 being in degrees centigrade, C being the weight percent of polymer in the blend, and X being the mol percent of recurring structural units other than metaphenylene isophthalamide.
    • 制备聚合物的均匀溶液的方法,其重复结构单元主要是间苯二甲酰间苯二胺单元,其包括: