发明授权
- 专利标题： Expandable styrene resin beads and suspension-polymerization process for producing the same
- 专利标题（中）： 可发性苯乙烯树脂珠及其制备的悬浮聚合方法
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申请号： US421244申请日： 1995-04-13
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公开(公告)号： US5616413A公开(公告)日： 1997-04-01
- 发明人: Hiroki Shinozaki , Masayuki Tanaka , Yonezo Ueda
- 申请人： Hiroki Shinozaki , Masayuki Tanaka , Yonezo Ueda
- 申请人地址： JPX Yokkaichi
- 专利权人： Mitsubishi Chemical BASF Company Limited
- 当前专利权人： Mitsubishi Chemical BASF Company Limited
- 当前专利权人地址： JPX Yokkaichi
- 优先权： JPX6-091559 19940428
- 主分类号： C08J9/20
- IPC分类号： C08J9/20 ; C08F2/18 ; C08F12/00 ; C08F12/08 ; C08J9/16 ; C08J9/18 ; B32B5/16
摘要：
Expandable styrene resin beads are described, which, when expanded to a bulk density of 20 g/l, give pre-expanded beads in which the number of cells present along those surface parts of radii which range from the bead surface to a depth of 0.2 mm from the surface is from 3 to 20 per mm and the number of cells present along those inner parts of the radii which range from a depth of 1 mm from the bead surface to the bead center is 10 or larger per mm, the number of cells present along said surface parts being smaller than the number of cells present along said inner parts.