发明名称 |
Process for preparing styrenic polymer foams |
摘要 |
Styrenic polymer particles having a substantially uniform particle size are prepared by suspending styrenic polymer particles having particle sizes in a certain range in water to provide an aqueous suspension and after adding to the suspension a styrenic monomer, a suspension polymerization catalyst and a polymerization retarder in an amount of 1/200 to 1/15 mole per 1 mole of the catalyst, conducting the suspension polymerization. By conducting the polymerization in the presence of a foaming agent, one can produce foamable styrenic polymer particles having a substantially uniform particle size.
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申请公布号 |
US4173688(A) |
申请公布日期 |
1979.11.06 |
申请号 |
US19780868592 |
申请日期 |
1978.01.11 |
申请人 |
SEKISUI KAGAKU KOGYO K K;SEKISUI KASEIHIN KOGYO K.K. |
发明人 |
BEPPU, YOSITUGU;NAKAYAMA, SHINPEI;SAITO, FUMIO;YAMAI, FUMITO |
分类号 |
C08F257/02;C08J9/20;(IPC1-7):C08J9/02 |
主分类号 |
C08F257/02 |
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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