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    • 7. 发明授权
    • Thermoplastic polyurethane elastomer blend and process for its
manufacture
    • 热塑性聚氨酯弹性体共混物及其制造方法
    • US5376723A
    • 1994-12-27
    • US54932
    • 1993-04-29
    • Ulrike VogtWolffried WerneisGunter Schuhmacher
    • Ulrike VogtWolffried WerneisGunter Schuhmacher
    • C08L75/04C08L9/02C08L21/00C08L75/00C08L33/20
    • C08L9/02C08L75/04
    • The subject invention is directed to a thermoplastic polymer blend of polyurethane and nitrile rubber having a Shore A hardness of about 55 to 70. The thermoplastic polyurethane component includes at least about 50 weight percent (wt. %) polyisocyanate; the nitrile rubber component includes about 34 mole percent (mol %) acrylonitrile; and, the ratio between the thermoplastic polyurethane component and the nitrile rubber component is about 30:70 to 40:60 volume percentage (vol %).The invention also provides a process for making a thermoplastic polyurethane blend having a Shore A hardness of about 55 to 70; prepared by mixing and kneading about about 180.degree. to 215.degree. C., polyurethane component including at least about 50 percent by weight polyisocyanate with a nitrile rubber having a viscosity of M.sub.L 1+4,100.degree. C.=50 and including about 34 mole percent (mol %) acrylonitrile in a ratio of polyurethane: nitrile rubber of about 30:70 to 40:60 percent by volume (% vol).
    • 本发明涉及聚氨酯和丁腈橡胶的热塑性聚合物共混物,其肖氏A硬度为约55至70。热塑性聚氨酯组分包括至少约50重量%(重量%)的多异氰酸酯; 丁腈橡胶组分包括约34摩尔%(摩尔%)的丙烯腈; 并且热塑性聚氨酯组分与丁腈橡胶组分之间的比率为约30:70至40:60体积百分比(体积%)。 本发明还提供了制备具有约55至70的肖氏A硬度的热塑性聚氨酯共混物的方法; 通过在约180℃至215℃下混合和捏合制备的聚氨酯组分,包含至少约50重量%的多异氰酸酯与粘度为ML 1 + 4,100℃的丁腈橡胶= 50并包括约34摩尔% mol%)丙烯腈,其聚氨酯:丁腈橡胶的比例为约30:70至40:60(体积%)。