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    • 6. 发明申请
    • COPOLYETHER ESTER COMPOSITION AND AIR BAG COVER MADE THEREFROM
    • 酚醛树脂组合物和空气袋盖
    • WO2003051991A1
    • 2003-06-26
    • PCT/NL2002/000795
    • 2002-12-05
    • DSM N.V.LANGE, Ronald, Frans, MariaRUTGERS, Gerhard, Johan
    • LANGE, Ronald, Frans, MariaRUTGERS, Gerhard, Johan
    • C08L67/02
    • C08G63/672B60R21/21656
    • The invention relates to a copolyether ester composition consisting essentially of a blend of (a)at least one copolyether ester consisting essentially of polyester hard segments and aliphatic polyether soft segments and having a hardness lower than 46 Shore D; and (b)at least one polyester with hardness higher than 60 Shore D, which polyester is compatible with the polyester hard segments of component (a); wherein components (a) and (b) are present in a mass ratio of 9/1 to 1/9, which composition has a modulus at -40°C lower than 500 MPa and at 190 °C higher than 10 MPa, as measured with a Dynamic Mechanical Spectrometer on a test-sample dynamically elongated at 1 Hz following ASTM D5026, and a melt viscosity, as measured at 240 °C and at shear rate 1 s -1 , of at least 1 kPa.s. An advantage of this composition is that an air bag cover moulded thereof, passes an air bag deployment test at -35 ± 2°C, also if the air bag cover is painted. The invention also relates to a process for preparing such a copolyether ester composition and to a process for making an air bag cover from such composition. The invention also relates to an air bag system comprising an air bag 20 cover obtainable by the latter process, which system successfully passes a deployment test at -35 ± 2°C.
    • 本发明涉及一种共聚醚酯组合物,其基本上由以下组分组成:(a)至少一种由聚酯硬链段和脂族聚醚软链段组成的共聚醚酯,其硬度低于46肖氏D; 和(b)至少一种硬度高于60肖氏D的聚酯,该聚酯与组分(a)的聚酯硬链段相容; 其中组分(a)和(b)以质量比9/1至1/9存在,该组合物的模量在-40℃低于500MPa和190℃下高于10MPa,如所测量 在动态机械光谱仪上按照ASTM D5026在1Hz下动态拉伸的测试样品,并且在240℃和剪切速率1s -1下测量的熔体粘度为至少1kPa.s。 该组合物的一个优点是,其模塑的气囊罩,如果气囊盖被涂漆,则在-35 +/- 2℃下进行气囊展开试验。 本发明还涉及一种制备这种共聚醚酯组合物的方法以及由这种组合物制备气囊盖的方法。 本发明还涉及一种气囊系统,其包括可通过后一过程获得的气囊20盖,该系统在-35 +/- 2℃下成功通过展开试验。