申请人:JAPAN POLYPROPYLENE CORPORATION
公开号:US20150004394A1
公开(公告)日:2015-01-01
Provided is a polypropylene-based resin composition which gives uniform and fine cells and from which a foamed sheet and thermoform excellent in appearance, thermoformability, impact resistance, lightness, stiffness, heat resistance, heat insulating properties, oil resistance and the like can be produced. A polypropylene-based resin composition comprising (X) 5 to 99% by weight of a polypropylene resin having a structure with long chain branches, and (Y) 1 to 95% by weight of a propylene-based block copolymer produced by sequential polymerization, which block copolymer comprises (Y-1) a propylene (co)polymer and (Y-2) a propylene-ethylene copolymer, said resin (X) having properties (X-i) to (X-iv) and said block copolymer (Y) having properties (Y-i) to (Y-v), and the like.
提供的是一种基于聚丙烯的树枝型结构树脂组合物,可以产生均匀细小的气孔,从中可以生产出外观、热成型性、冲击抗性、轻便性、刚度、耐热性、隔热性、耐油性等方面优异的泡沫板和热成型产品。该聚丙烯基树脂组合物包括(X)5-99%重量的具有长链支化结构的聚丙烯树脂,以及(Y)1-95%重量的经顺序聚合制备的丙烯基嵌段共聚物,该嵌段共聚物包括(Y-1)丙烯(共)聚物和(Y-2)丙烯-乙烯共聚物,其中树脂(X)具有属性(X-i)至(X-iv),嵌段共聚物(Y)具有属性(Y-i)至(Y-v)等。