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    • 5. 发明申请
    • EXTRUDED SAN FOAMS
    • US20120161061A1
    • 2012-06-28
    • US13394477
    • 2010-09-06
    • Klaus HahnHolger RuckdäschelIngo BellinPeter MerkelMarkus Hartenstein
    • Klaus HahnHolger RuckdäschelIngo BellinPeter MerkelMarkus Hartenstein
    • C08J9/08C08L33/20E04B1/74C08F220/44
    • C08J9/127C08J2201/03C08J2205/052C08J2325/12
    • Closed-cell extruded foam extruded foam with density in the range from 20 to 150 g/l and with a cell number in the range from 1 to 30 cells per mm is obtainable via (a) heating of a polymer component P, formed from P1) from 80 to 100% by weight (based on P) of one or more styrene-acrylonitrile copolymers (SAN), comprising a1) from 18 to 40% by weight (based on SAN) of copolymerized acrylonitrile, a2) from 60 to 82% by weight (based on SAN) of copolymerized styrene, and a3) from 0 to 22% by weight (based on SAN) of at least one copolymerized monomer from the group consisting of alkyl(meth)acrylates, (meth)acrylic acid, maleic anhydride and maleimides, P2) from 0 to 20% by weight (based on P) of one or more thermoplastic polymers from the group consisting of styrene copolymers, polyolefins, polyacrylates, polycarbonates (PC), polyesters, polyamides, polyether sulfones (PES), polyether ketones (PEK), and polyether sulfides, to form a polymer melt, (b) introduction of from 1 to 12% by weight (based on P) of a blowing agent component (T), which comprises less than 0.2% by weight of water (based on P), comprising b1) from 15 to 95% by weight (based on T) of carbon dioxide and b2) from 5 to 85% by weight (based on T) of one or more co-blowing agents selected from the group consisting of C1-C4 alcohols and C1-C4 carbonyl compounds, into the polymer melt to form a foamable melt, (c) extrusion of the foamable melt into a region of relatively low pressure, with foaming to give the extruded foam, (d) if appropriate, addition of additives to the polymer component (P) in at least
    • 通过(a)加热由P1形成的聚合物组分P,可获得密度为20至150g / l,细胞数范围为1至30个细胞/ mm的闭孔挤出泡沫挤出泡沫体 )80至100重量%(基于P)一种或多种苯乙烯 - 丙烯腈共聚物(SAN),其包含a1)18至40重量%(基于SAN)共聚丙烯腈,a2)60至82 共聚苯乙烯的重量%(基于SAN),和a3)0至22重量%(基于SAN)的至少一种由(甲基)丙烯酸烷基酯,(甲基)丙烯酸烷基酯,(甲基)丙烯酸烷基酯, 马来酸酐和马来酰亚胺,P2)0至20重量%(基于P)来自苯乙烯共聚物,聚烯烃,聚丙烯酸酯,聚碳酸酯(PC),聚酯,聚酰胺,聚醚砜(PES)的一种或多种热塑性聚合物 ),聚醚酮(PEK)和聚醚硫化物,以形成聚合物熔体,(b)引入1至12%重量 h(基于P)发泡剂组分(T),其包含小于0.2重量%的水(基于P),其包含b1)15至95重量%(基于T)的二氧化碳和 b2)5至85重量%(基于T)一种或多种选自C1-C4醇和C1-C4羰基化合物的共发泡剂,进入聚合物熔体以形成可发泡的熔体( c)将可发泡的熔体挤出到相对较低压力的区域中,发泡以得到挤出的泡沫,(d)如果合适,至少在聚合物组分(P)中加入添加剂