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    • 48. 发明授权
    • Transparent thermoplastic polyurethanes having low haze and good processability, methods of making the same, and uses therefor
    • 具有低雾度和良好加工性的透明热塑性聚氨酯,其制备方法及其用途
    • US08497341B2
    • 2013-07-30
    • US12358356
    • 2009-01-23
    • Henricus PeerlingsFaisal ShafiqMarkus Broich
    • Henricus PeerlingsFaisal ShafiqMarkus Broich
    • C08G18/32C08G18/73
    • C08G18/3215C08G18/3206C08G18/44C08G18/664C08G18/6674C08G18/73
    • Light-stable, thermoplastic polyurethanes with good processability and having an ASTM D-1003 haze value of less than 10%, the polyurethane prepared by a process comprising: reacting: (a) a diisocyanate component comprising 1,6-hexamethylene diisocyanate; (b) a chain extension component consisting of (b1) 1,4-di(β-hydroxyethyl)hydroquinone and (b2) at least one chain extender selected from the group consisting of diols having a 2 or 3 carbon atom chain length between the two OH groups, in a molar ratio of chain extender (b1) to chain extender (b2) of 10:1 to 1:4; and (c) at least one polyol component having a number average molecular weight of 450 to 10000 g/mol, and an average number of Zerewitinoff-active hydrogen atoms of at least 1.8 to at most 3.0; wherein the ratio of isocyanate groups in component (a) to isocyanate-reactive groups in components (b) and (c) is 0.9:1 to 1.1:1.
    • 具有良好加工性并且具有小于10%的ASTM D-1003雾度值的轻稳定的热塑性聚氨酯,通过包括以下方法制备的聚氨酯制备:(a)包含1,6-六亚甲基二异氰酸酯的二异氰酸酯组分; (b)由(b1)1,4-二(β-羟乙基)氢醌和(b2)至少一种增链剂组成的链延伸组分,所述链增链剂选自二者或二者之间具有2或3个碳原子链长的二醇 两个OH基,扩链剂(b1)与扩链剂(b2)的摩尔比为10:1至1:4; 和(c)数均分子量为450〜10000g / mol,Zerewitinoff活性氢原子的平均数为至少1.8〜3.0的至少一种多元醇成分, 其中组分(a)中异氰酸酯基与组分(b)和(c)中异氰酸酯反应性基团的比例为0.9:1至1.1:1。