发明名称 |
PROCESS FOR MAKING POLYSTYRENE FOAM |
摘要 |
<p>An improved polystyrene foam having less corrugation is disclosed which uses carbon dioxide as the blowing agent and 1-30 weight percent endothermic agent, such as water, with the weight based on the total carbon dioxide blowing agent and endothermic agent weight. This combination of carbon dioxide and endothermic agent decreases the corrugation of the thermoplastic foam, while just slightly increasing density, when the process parameters, including throughput, are equivalent to using only carbon dioxide. The process an also allow an increased foaming temperature and greater process throughput of an equivalent density thermoplastic foam at approximately equivalent corrugation levels when compared to the use of only using only carbon dioxide.</p> |
申请公布号 |
EP0637329(B1) |
申请公布日期 |
1999.03.10 |
申请号 |
EP19930909507 |
申请日期 |
1993.04.12 |
申请人 |
THE DOW CHEMICAL COMPANY |
发明人 |
WELSH, GARY, C.;DALKE, BRIAN, D.;LEE, ERIC, KWING, CHIU |
分类号 |
C08J9/12;(IPC1-7):C08J9/12 |
主分类号 |
C08J9/12 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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