发明名称 |
Ekspanderbar sammensetning, ekspanderte kuler og st°pte deler |
摘要 |
The present invention relates to a homogeneous composition of an expandable styrene polymer in the form of beads comprising (a) 100 parts b.w. of a styrene polymer having a weight-average molecular mass of 150,000 to 300,000 and a residual monomer content of less than 2,000 ppm, (b) from 2 to 9 parts by weight of at least one blowing agent comprising n-pentane, (c) from 0.1 to less than 1.0 part by weight of a petroleum wax comprising a mixture of C18 to C80 alkanes, and (d) from 0 to 1.0 part by weight of a nucleating agent chosen from synthetic Fisher-Tropsch or polyolefin waxes. The composition allows the step of pre-expanding the beads to be improved by increasing the rate of expansion of the beads and by improving the productivity of the pre-expansion step, without substantially affecting the final moulding step. |
申请公布号 |
NO993199(D0) |
申请公布日期 |
1999.06.28 |
申请号 |
NO19990003199 |
申请日期 |
1999.06.28 |
申请人 |
BP CHEMICALS LTD |
发明人 |
CARLIER, CHRISTOPHE;DOUAY, DAVID;GALEWSKI, JEAN-MARC |
分类号 |
C08L25/04;C08F12/08;C08J9/00;C08J9/06;C08J9/20;C08K5/01;C08L25/06;C08L91/06;(IPC1-7):C08L |
主分类号 |
C08L25/04 |
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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