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    • 59. 发明授权
    • Process for the production of molded polyurethane bodies
    • 生产模塑聚氨酯体的工艺
    • US5028684A
    • 1991-07-02
    • US81958
    • 1987-08-05
    • Alfred NeuhausOtto GansterBruno Luckas
    • Alfred NeuhausOtto GansterBruno Luckas
    • C08G18/40C08G18/48C08G18/65C08G18/66C08G18/76
    • C08G18/4804C08G18/4072C08G18/4833C08G18/6666C08G18/7664C08G2120/00
    • The present invention is directed to a process for the preparation of molded polyurethane articles having densities of about 0.8 to 1.4 g/cm.sup.3 and a flex moduli according to DIN 53,457 of at least about 1800 N/mm.sup.2 by reacting according to the technique of reaction injection molding(a) di- and/or polyisocyanates of the diphenylmethane series with(b) polyether polyols in the molecular weight range of 500 to 999,(c) organic polyhydroxyl compounds in the molecular weight range of 62 to 499 and optionally(d) polyethers in the molecular weight range of 1000 to about 10,000 containing at least two isocyanate reactive groups and/or(e) aromatic diamines with a molecular weight of less than 500 in the presence of(f) catalysts which accelerate the isocyanate addition reactionwherein(i) the polyether polyols used as component (b) have at least about 30% by weight of ethylene oxide units incorporated in polyether chains,(ii) component (d) is used in a quantity of 0 to about 40% by weight, based on the weight of components (b) to (e), and(iii) the nature and quantitative proportions of components (b) to (e) are chosen so that the average hydroxyl number of the mixture of these components is greater than about 300.
    • 本发明涉及根据反应注射技术制备具有约0.8至1.4g / cm 3的密度和至少约1800N / mm 2的根据DIN 53,457的挠曲模量的模制聚氨酯制品的方法 (a)二苯基甲烷系列的二 - 和/或多异氰酸酯与(b)分子量范围为500至999的聚醚多元醇,(c)分子量范围为62至499的有机多羟基化合物和任选的(d) 在(f)加速异氰酸酯加成反应的催化剂的存在下,分子量范围为1000至约10,000的聚醚包含至少两个异氰酸酯反应性基团和/或(e)分子量小于500的芳族二胺,其中( i)用作组分(b)的聚醚多元醇具有至少约30重量%的掺入聚醚链中的环氧乙烷单元,(ii)组分(d)的用量为0至约40重量%,b 根据组分(b)至(e)的重量,和(iii)选择组分(b)至(e)的性质和定量比例,使得这些组分的混合物的平均羟值大于约 300。