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    • 7. 发明授权
    • Aqueous solutions or dispersions of polyurethanes, a process for their
preparation and their use in coating compositions
    • 聚氨酯的水溶液或分散体,其制备方法及其在涂料组合物中的用途
    • US5041494A
    • 1991-08-20
    • US264300
    • 1988-10-28
    • Joachim FrankeHanns P. Muller
    • Joachim FrankeHanns P. Muller
    • C08G18/00C08G18/08C08G18/10C08G18/28C08G18/38C08G18/83C08L75/00C08L75/04C09D175/00
    • C08G18/832C08G18/0814C08G18/10C08G18/283C08G18/289C08G18/3893
    • The present invention is directed to aqueous solutions or dispersions of cationically modified polyurethanes, characterized in that the dissolved or dispersed polyurethanes(i) contain about 2 to 200 milliequivalents of incorporated ammonium groups per 100 g of solids content,(ii) contain 0 to about 25% by weight of ethylene oxide units within terminal or lateral polyether chains and(iii) contain at least 1.3% by weight, calculated as SiO.sub.3 (molecular weight=76), of built-in structural units corresponding to the formula ##STR1## wherein R', R" and R"' may be the same or different and represent hydrogen or alkyl groups containing 1 to 4 carbon atoms,the total quantity of hydrophilic structural units (i) and (ii) being sufficient to ensure the solubility or dispersibility of the polyurethanes in water and the solutions or dispersions having a pH value of 3 to 6. The present invention is also directed to a process for the preparation of these storage stable aqueous solutions or dispersions and to their use as coating compounds or for the preparation of coating compositions for any substrates.
    • 本发明涉及阳离子改性聚氨酯的水溶液或分散体,其特征在于溶解或分散的聚氨酯(i)每100g固体含量含有约2至200毫当量的并入铵基团,(ii)含有0至约 末端或侧面聚醚链中的25重量%的环氧乙烷单元和(iii)含有至少1.3重量%(以SiO 3计(分子量= 76)计算)的内置结构单元对应于式,其中 R',R“和R”可以相同或不同,表示氢或含有1至4个碳原子的烷基,亲水结构单元(i)和(ii)的总量足以确保溶解度 或聚氨酯在水中的分散性以及pH值为3至6的溶液或分散体。本发明还涉及制备这些储存稳定的水溶液或分散体的方法 离子和它们作为涂料化合物的用途或用于制备用于任何底物的涂料组合物。