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    • 4. 发明授权
    • Thermoplastic polyurethanes and a two-stage process for their preparation
    • 热塑性聚氨酯及其制备的两阶段工艺
    • US3963656A
    • 1976-06-15
    • US546062
    • 1975-01-31
    • Ernst MeisertWilhelm Goyert
    • Ernst MeisertWilhelm Goyert
    • C08G18/10C08G18/32
    • C08G18/10
    • Polyurethane elastomers suitable for coating textiles, leather, paper and similar substrate and a multi-stage process for their production. The polyurethane elastomers are obtained fromA. a polyol with an average molecular weight between 900 and 5300,B. 4,4'-diisocyanatodiphenylmethane andC. a diol with a molecular weight below 500, characterized in that the equivalent ratio ((b)/(a)+(c)) is between 0.87 and 1 and in that (a) contains at least 40% by weight of a polyurethane of the formula ##EQU1## where R is a divalent group such as can be obtained by removing the hydroxyl groups from a diol which has a molecular weight of between 700 and 1750, andQ is a divalent aliphatic, cycloaliphatic, araliphatic or aromatic group which contains 2 to 20, and preferably, 4 to 15, carbon atoms; but Q is not ##SPC1##
    • 适合涂布纺织品,皮革,纸张和类似基材的聚氨酯弹性体,以及用于生产的多阶段工艺。 聚氨酯弹性体得自A.具有900和5300之间的平均分子量的多元醇,B,4,4'-二异氰酸亚氨基乙酯和C.具有以下分子量的二醇,其特征在于等同比((B) /(A)+(C))在0.87和1之间,并且其中(A)至少包含40质量%的配方HO-ROC-NH-Q-NH-COR-OH并行性平行OO的聚氨酯,其中 R是二价基团,例如可以通过从分子量为700〜1750的二醇除去羟基而获得,Q为含有2〜20的二价脂肪族,脂环族,芳脂族或芳族基团,优选 ,4至15个碳原子; 但Q不是