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    • 48. 发明授权
    • Microcellular polyurethane elastomer and manufacturing method of the same
    • 微孔聚氨酯弹性体及其制造方法相同
    • US4647596A
    • 1987-03-03
    • US856217
    • 1986-04-28
    • Seiji IshiiMasanori MiyoshiTakumi IshiwakaOsamu Kondo
    • Seiji IshiiMasanori MiyoshiTakumi IshiwakaOsamu Kondo
    • C08G18/00C08G18/40C08G18/42C08G18/66C08G18/14
    • C08G18/4277C08G18/4202C08G18/6637C08G2101/0066C08G2350/00Y10S521/904
    • Polyol component essentially consists of polyesterpolyetherpolyol containing polyesterpolyol by the weight ratio of 100:0 to 20:80, in which the polyesterpolyetherpolyol is a copolymer of polytetramethyleneglycol (PTMG) and .epsilon.-caprolactone by the weight ratio of 20:80 to 80:20 with an average molecular weight of 1000 to 3000 and the polyesterpolyol is a condensate of adipic acid as a main acid component with an average molecular weight of 1000 to 3000, is reacted with isocyanate component essentially consists of 4,4'-diphenylmethanediisocyanate (MDI) to make a prepolymer with terminal radical of NCO.Microcellular polyurethane produced from the prepolymer by foaming and polymerization reaction has the durability for vibration-proof material of car use, combining the advantage of PTMG such as high initial modulus at elongation, low heat built up, low-temperature property and hydrolysis-durability under high humid and hot conditions, with the advantage of polycaprolactone such as good molding property and anti-bending-fatigue property, as well as making up for the disadvantage of both polyols each other. Thus improving the problems of microcellular polyurethane using MDI such as low initial modulus at elongation and high heat built up.
    • 多元醇组分主要由聚酯多元醇多元醇组成,重量比为100:0至20:80,其中聚酯多元醇是聚四亚甲基二醇(PTMG)与ε-己内酯的共聚物,重量比为20:80至80:20, 平均分子量为1000〜3000,聚酯多元醇是己二酸作为主要酸成分的平均分子量为1000〜3000的缩合物,与异氰酸酯成分基本上由4,4'-二苯基甲烷二异氰酸酯(MDI)组成, 制备具有NCO末端基团的预聚物。 通过发泡和聚合反应由预聚物生产的微孔聚氨酯具有耐汽车使用的防振材料的耐久性,结合PTMG的优点,如伸长时的高初始模量,低热累积,低温性能和水解耐久性 高湿热条件下,具有良好的成型性和抗弯曲疲劳性等聚己内酯的优点,并且弥补了这两种多元醇的缺点。 从而改善了使用MDI的微孔聚氨酯的问题,如伸长时的低初始模量和高热积聚。