Crosslinked ethylene-olefin copolymer foams
    2.
    发明授权
    Crosslinked ethylene-olefin copolymer foams 有权
    交联的乙烯 - 烯烃共聚物泡沫

    公开(公告)号:US06197841B1

    公开(公告)日:2001-03-06

    申请号:US09368344

    申请日:1999-08-05

    IPC分类号: C08J900

    CPC分类号: C08J9/10 C08J2323/08

    摘要: A crosslinked ethylene-olefin copolymer foam and a method for the production thereof are disclosed. The foam having a gel content of 70 to 99%, an apparent density of 0.2 to 0.02 g/cm3, 25% compression set at 40° C. of 0.1 to 20.0%, 25% compression hardness of 0.1 to 1.0 kgf/cm2, and Asker C type surface hardness of 3 to 40 is foamed from a copolymer of ethylene and &agr;-olefin having 3 to 18 carbon atoms, the copolymer having a melt flow rate (MFR) of 0.1 to 100 g/10 minutes, a critical shear rate (CSR) satisfying the equation: log[CSR]≦2.48+0.500×log[MFR], a density of 0.860 to 0.935 g/cm3, a Q value determined by the size exclusion chromatography (SEC) of 1.5 to 4, and an extrapolated end temperature of melting (Tem) of 65° C. to 130° C.

    摘要翻译: 公开了一种交联的乙烯 - 烯烃共聚物泡沫及其制备方法。 凝胶含量为70〜99%,表观密度为0.2〜0.02g / cm3,压缩永久变形40℃,压缩永久变形率为20.0〜25%,压缩硬度为0.1〜1.0kgf / cm 2, 并且Asker C型表面硬度为3〜40是由乙烯和碳原子数3〜18的α-烯烃的共聚物发泡的,共聚物的熔体流动速率(MFR)为0.1〜100g / 10分钟,临界剪切 速率(CSR)满足以下等式:log [CSR] <= 2.48 + 0.500xlog [MFR],密度为0.860至0.935g / cm 3,由尺寸排阻色谱(SEC)确定的Q值为1.5至4,以及 熔化的外推最终温度(Tem)为65℃至130℃。