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公开(公告)号:US4451417A
公开(公告)日:1984-05-29
申请号:US450218
申请日:1982-12-16
CPC分类号: C08J9/143 , B29C44/50 , B29K2025/00 , B29L2007/002 , C08J2325/04 , Y10S264/05
摘要: In a method of producing a plate-like polystyrene resin foam which comprises extruding a molten mixture of a polystyrene resin and a volatile blowing agent from an extruder into a zone kept at a lower pressure than the inside of the extruder, the improvement wherein the volatile blowing agent is a mixture consisting of 50 to 80% by weight of dichlorodifluoromethane and 50 to 20% by weight of ethyl chloride and is present in said molten mixture in a proportion of 8 to 17 parts by weight per 100 parts by weight of the polystyrene resin.
摘要翻译: 在制造板状聚苯乙烯树脂发泡体的方法中,其包括从挤出机将聚苯乙烯树脂和挥发性发泡剂的熔融混合物挤出到保持在比挤出机内部更低的压力下的区域,其中挥发性 发泡剂是由50至80重量%的二氯二氟甲烷和50至20重量%的乙基氯组成的混合物,并且以每100重量份聚苯乙烯重量计8至17重量份的比例存在于所述熔融混合物中 树脂。