发明授权
- 专利标题： VERFAHREN ZUR HERSTELLUNG VON CO-EXTRUDATEN AUS POLYSTYROL UND EINEM VERNETZTEN POLYVINYLPYRROLIDON MIT VERRINGERTEM STYROL-RESTMONOMERGEHALT
- 专利标题（英）： Method for the production of co-extrudates composed of polystyrene and of a crosslinked polyvinylpyrrolidone with reduced residual styrene monomer content
- 专利标题（中）： 用于生产CO挤出聚苯乙烯，交联聚乙烯吡咯烷酮减量单体苯乙烯
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申请号： EP07803353.7申请日： 2007-09-10
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公开(公告)号： EP2066707B1公开(公告)日： 2010-07-14
- 发明人: MEFFERT, Helmut , PIEROBON, Marianna , ERK, Ates , FEISE, Hermann Josef , BAYER, Robert
- 申请人： BASF SE
- 申请人地址： 67056 Ludwigshafen DE
- 专利权人： BASF SE
- 当前专利权人： BASF SE
- 当前专利权人地址： 67056 Ludwigshafen DE
- 优先权： EP06120536 20060912
- 国际公布： WO2008031779 20080320
- 主分类号： C08F6/00
- IPC分类号： C08F6/00 ; C08L25/04 ; C08L39/06
摘要：
Method for the removal of residual styrene monomers from polystyrene and from co-extrudates comprising crosslinked polyvinylpyrrolidone which is not soluble in water, characterized in that an aqueous suspension of the particulate solid co-extrudate is subjected to heat treatment at temperatures from 60 to 99°C, where the ratio by weight of solid co-extrudate to water in the suspension is from 1:1.5 to 1:20, and the concentration of the suspension is held constant during the treatment.
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