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    • 8. 发明公开
    • 발포용 열가소성 수지조성물
    • 可泡沫热塑性树脂组合物
    • KR1020010009382A
    • 2001-02-05
    • KR1019990027731
    • 1999-07-09
    • 한화토탈 주식회사
    • 정긍모이원
    • C08L31/04
    • C08L23/0853C08F10/02C08F2500/12C08J9/04C08J9/10C08K5/14C08L21/00C08L23/06
    • PURPOSE: A foamable thermoplastic resin composition having low specific gravity obtained by blending a foaming agent, a cross linking agent and other additives with a resin mixture of an ethylene-vinylacetate copolymer, super low density polyethylene as a low density ethylene based copolymer and rubbers is provided, which has excellent mechanical properties such as tensile strength, tear strength, inner strength and elongation percentage and whiteness degree and improved compression recovery rate and contraction rate. CONSTITUTION: The resin composition comprises 100 parts by weight of a resin mixture comprising 50 to 90% by weight of an ethylene-vinylacetate copolymer having a vinylacetate content of 15 to 28% by weight and a melt index of 1 to 10g/10min, 10 to 30% by weight of super low density polyethylene having a density of 0.870 to 0.915 g/cm3 and a melt index of 0.5 to 10g/10min and less than 20% by weight of rubbers, 1 to 10 parts by weight of a foaming agent and 0.1 to 1.5 parts by weight of a crossing agent. The rubbers are an ethylene-propylene-diene monomer, butadiene rubber, isoprene rubber, styrene-butadiene rubber, nitrile-butadiene rubber or isoprene-isobutyl rubber.
    • 目的:通过将发泡剂,交联剂和其它添加剂与乙烯 - 乙酸乙烯酯共聚物,超低密度聚乙烯作为低密度乙烯基共聚物和橡胶的树脂混合物共混获得的具有低比重的可发泡热塑性树脂组合物是 具有拉伸强度,撕裂强度,内部强度和伸长率以及白度以及压缩恢复率和收缩率等优异的机械特性。 构成:树脂组合物包含100重量份的树脂混合物,其包含50至90重量%的乙酸乙烯酯含量为15至28重量%,熔体指数为1至10g / 10分钟的乙烯 - 乙酸乙烯酯共聚物,10 至30重量%的密度为0.870至0.915g / cm 3,熔体指数为0.5至10g / 10min且小于20重量%的橡胶的超低密度聚乙烯,1至10重量份的发泡剂 和0.1〜1.5重量份的交联剂。 橡胶是乙烯 - 丙烯 - 二烯单体,丁二烯橡胶,异戊二烯橡胶,苯乙烯 - 丁二烯橡胶,丁腈橡胶或异戊二烯 - 异丁基橡胶。