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    • 42. 发明授权
    • Process for the preparation of aqueous polyurethane dispersions
    • 水性聚氨酯分散液的制备方法
    • US4314922A
    • 1982-02-09
    • US231720
    • 1981-02-05
    • August LehnerAlexander KudHeinrich Hartmann
    • August LehnerAlexander KudHeinrich Hartmann
    • C08G18/00C08G18/67C08G18/83C08J3/07C08L75/12
    • C08J3/07C08G18/6705C08G18/675C08G18/835C08J2375/04
    • A process for preparing aqueous polyurethane dispersions has been discovered which comprises(a) forming a polyurethane solution by reacting an organic polyisocyanate in the presence of a solvent with(i) an acrylic ester diol having a molecular weight of between 146 and 3,000;(ii) an organic polyhydroxyl compound other than (i) having a molecular weight between 400 and 5,000 selected from the group consisting of polyester polyols, polyether polyols, polycarbonates, polylactones, and mixtures thereof; and(iii) a chain extender having a molecular weight between 62 and 400 selected from the group consisting of diols, triols, diamines, aminoalcohols, and mixtures thereof;(b) forming an anionic polyurethane addition product by reacting said polyurethane solution with a mercaptocarboxylic acid salt in the presence of a solvent;(c) adding water; and(d) removing the solvent.The dispersions can be used in a variety of applications. For instance, they can be used to prepare films, coating, and binders.
    • 已经发现了一种制备水性聚氨酯分散体的方法,其包括(a)通过有机多异氰酸酯在溶剂存在下与(i)分子量为146至3,000的丙烯酸酯二醇反应形成聚氨酯溶液; (ii)除(i)分子量为400-5000之外的有机多羟基化合物,其选自聚酯多元醇,聚醚多元醇,聚碳酸酯,聚内酯及其混合物; 和(iii)分子量在62和400之间的扩链剂,其选自二醇,三醇,二胺,氨基醇及其混合物; (b)通过在溶剂存在下使所述聚氨酯溶液与巯基羧酸盐反应形成阴离子聚氨酯加成产物; (c)加水; 和(d)除去溶剂。 分散体可用于各种应用。 例如,它们可用于制备膜,涂层和粘合剂。