发明名称 |
Process for the production of expanded particles of a polypropylene resin |
摘要 |
<p>A process for the production of expanded particles, which comprises providing an aqueous dispersion containing expandable particles which are formed of a polypropylene resin and which contain a blowing agent and an expansion aid and maintained at a temperature higher than the softening point of the resin and under a pressurized condition, and subjecting the dispersion to a lower pressure so that the expandable particles are expanded. The expansion aid is organic or inorganic solids having a particle size of 0.1 to 150 mu m and a melting point higher than the temperature at which the expansion of the expandable particles is performed and serves to improve the expansion ratio.</p> |
申请公布号 |
EP0168954(B2) |
申请公布日期 |
1996.01.24 |
申请号 |
EP19850304138 |
申请日期 |
1985.06.11 |
申请人 |
JAPAN STYRENE PAPER CORPORATION |
发明人 |
KUWABARA, HIDEKI |
分类号 |
C08J9/00;C08J9/228;(IPC1-7):C08J9/22;C08K3/00;C08K5/10;C08L23/02;C08K5/06 |
主分类号 |
C08J9/00 |
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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