发明名称 |
Verfahren zur Herstellung eines modifizierten Polyethylen in einem Extruder |
摘要 |
The present invention relates to a process for modifying a polyethylene in an extruder. The polyethylene is brought into contact with oxygen or a gas mixture containing oxygen in the extruder, optionally in the presence of a relatively small quantity or preferably in the absence of short-term antioxidant agent. The polyethylene thus brought into contact is treated thermomechanically in the molten state in the extruder supplying a relatively high specific mechanical energy, the treatment being conducted to its term when the value of the loss tangent of the polyethylene characterizing its viscoelastic state decreases with a desired proportion. The polymer thus treated is particularly suitable for being transformed into film by blown extrusion with a considerably increased bubble stability. |
申请公布号 |
DE69515944(D1) |
申请公布日期 |
2000.05.04 |
申请号 |
DE1995615944 |
申请日期 |
1995.08.14 |
申请人 |
BP CHEMICALS LTD., LONDON;BP CHEMICALS S.N.C., COURBEVOIE |
发明人 |
PAINA, ALAIN |
分类号 |
B29B13/02;B29C47/00;B29C47/40;B29C55/28;B29C67/24;B29K23/00;C08F8/00;C08F8/50 |
主分类号 |
B29B13/02 |
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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