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    • 2. 发明授权
    • Expandable ABS resin beads and process for producing the same
    • 可膨胀的ABS树脂珠及其制造方法
    • US5837740A
    • 1998-11-17
    • US531603
    • 1995-09-21
    • Kenji HaraguchiTakanori SuzukiYoshinari Itoh
    • Kenji HaraguchiTakanori SuzukiYoshinari Itoh
    • C08J9/18
    • C08J9/18C08J2355/02Y10T428/249989Y10T428/2998
    • Expandable ABS resin beads containing a volatile blowing agent are disclosed which have an internal-water content of 5% by weight or lower and, when expanded in an expansion ratio of 30, give expanded beads each having a non-expanded surface layer having a thickness of not more than 50 .mu.m. A process for producing the expandable ABS resin beads is also disclosed which comprises dispersing ABS resin beads into an aqueous medium in a closed vessel and impregnating a volatile blowing agent into the ABS resin beads, said aqueous medium containing an electrolyte at least during the impregnation of the volatile blowing agent, with the concentration of the electrolyte in the aqueous medium being from 0.01 to 2 mol/l. The expandable resin beads are capable of giving an expanded molded article excellent in chemical resistance and toughness and especially in surface appearance and heat resistance.
    • 公开了含有挥发性发泡剂的可发性ABS树脂珠,其内含水量为5重量%以下,当以30的发泡倍率膨胀时,得到各自具有非发泡表面层的发泡珠,其厚度为 不超过50亩。 还公开了一种用于生产可膨胀ABS树脂珠粒的方法,其包括将ABS树脂珠粒分散在密闭容器中的水性介质中,并将挥发性发泡剂浸渍到ABS树脂珠粒中,所述水性介质至少在浸渍期间含有电解质 挥发性发泡剂,水介质中电解质的浓度为0.01〜2mol / l。 可膨胀树脂珠能够赋予耐化学性和韧性优异,特别是表面外观和耐热性优异的发泡成型体。
    • 8. 发明授权
    • Expandable rubber-modified styrene resin compositions
    • 可膨胀橡胶改性苯乙烯树脂组合物
    • US06232358B1
    • 2001-05-15
    • US09151603
    • 1998-09-11
    • Kenji HaraguchiTaketoshi Kajihara
    • Kenji HaraguchiTaketoshi Kajihara
    • C08F3604
    • C08J9/18C08F279/02C08J2203/14C08J2351/04C08L51/04
    • To provide an expandable rubber-modified styrene resin composition that is enabled to obtain a molded foam having a high expansion ratio, an excellent impact resistance and pliability and satisfactory appearance. The expandable rubber-modified styrene resin composition comprises 85 to 99% by weight of a rubber-modified styrene resin containing a rubber particle of a diene polymer dispersed in a continuous phase of a styrene resin and 1 to 15% by weight of a volatile blowing agent whose boiling point is 80° C. or lower, wherein: the weight-average molecular weight of said continuous phase of styrene resin is 150,000 to 300,000; the graft ratio of the styrene resin to the diene polymer is 70 to 135%; and, the swelling index of the gel fraction of said diene polymer in toluene at 25° C. is 12 to 25.
    • 提供一种能够获得具有高膨胀率,优异的耐冲击性和柔软性以及令人满意的外观的模制泡沫塑料的可膨胀橡胶改性苯乙烯树脂组合物。 可发性橡胶改性苯乙烯树脂组合物包含85至99重量%的含有分散在苯乙烯树脂的连续相中的二烯聚合物的橡胶颗粒和1至15重量%的挥发性吹塑剂的橡胶改性苯乙烯树脂 沸点为80℃以下的试剂,其中:所述苯乙烯系树脂的连续相的重均分子量为15万〜30万,苯乙烯系树脂与二烯系聚合物的接枝率为70〜135%。 所述二烯聚合物在甲苯中的凝胶分数在25℃下的溶胀指数为12〜25。