THERMOPLASTIC ELASTOMER COMPOSITION FOR FOAMING, MOLDED FOAM THEREOF, COMPOSITE MOLDED PRODUCT USING THE MOLDED FOAM, AND INSTRUMENT PANEL FOR AUTOMOBILE
申请人:KURITA Hayato
公开号:US20110117358A1
公开(公告)日:2011-05-19
[Problem] To provide a thermoplastic elastomer composition for foaming, which has sufficient foamability and provides a molded article having good appearance.
[Solution to Problem] A thermoplastic elastomer composition for foaming, which comprises 10 to 40% by weight of a partially or completely crosslinked ethylene/α-olefin/non-conjugated polyene copolymer rubber (A) comprising ethylene, an α-olefin of 3 to 20 carbon atoms and a non-conjugated polyene, 3 to 33% by weight of an ethylene/α-olefin copolymer (B) comprising ethylene and an α-olefin of 3 to 20 carbon atoms, 10 to 40% by weight of polypropylene (C) having a melting point, as determined by differential scanning calorimetry (DSC), of 40 to 170° C., 10 to 45% by weight of a softener (D) for rubbers, and at least one substance selected from an isotactic propylene-based polymer (E-a) in an amount of 1 to 30% by weight and a syndiotactic α-olefin-based copolymer (E-b) in an amount of 1 to 20% by weight, with the proviso that the total amount of the components (A), (B), (C), (D), (E-a) and (E-b) is 100% by weight.
[问题] 提供一种热塑性弹性体泡沫组合物,具有足够的泡沫性和提供外观良好的成型品。[解决方案] 一种热塑性弹性体泡沫组合物,包括:10%至40%重量的部分或完全交联的乙烯/α-烯烃/非共轭多烯共聚物橡胶(A),其中包括乙烯,3至20个碳原子的α-烯烃和非共轭多烯;3%至33%重量的乙烯/α-烯烃共聚物(B),其中包括乙烯和3至20个碳原子的α-烯烃;10%至40%重量的聚丙烯(C),其熔点由差示扫描量热法(DSC)确定为40至170℃;10%至45%重量的橡胶软化剂(D);以及至少选择一种物质,所述物质从在1至30%重量范围内的异构聚丙烯基聚合物(E-a)和在1至20%重量范围内的顺反式α-烯烃基共聚物(E-b)中选择,但前提是组分(A),(B),(C),(D),(E-a)和(E-b)的总量为100%重量。