申请人:Borve Kjetil
公开号:US20050038200A1
公开(公告)日:2005-02-17
The present invention refers to a process for preparing cross-linked polyolefins, comprising the steps of adding a diazido compound of the formula (I) N═N═N—X—R—X—N═N=N wherein R represents an aryl, alkyl or aralkyl group having 3 to 20 carbon atoms and X stands for —CO—, —O—CO—SO
2
-, —PO
2
-, —PO
3
—, or -Si (═O)—, and a peroxide compound of the general formula (II) R
1
-X
1
-OO—X
2
—R
2
wherein R
1
and R
2
are the same or different and represent hydrogen, an aryl, alkyl or aralkyl group having 3 to 20 carbon atoms and optionally comprising further peroxide groups, wherein one of R
1
and R
2
can form a ring, and X
1
and X
2
are the same or different and stand for a direct bond, —CO
2
— or —CO— to a polyolefin in powder or pellet form; mixing the product to obtain a mixture; extruding the mixture in an extruder at a temperature above the decomposition temperature of the diazido compound of formula (I) and of the peroxide compound of formula (II).
本发明涉及一种制备交联聚烯烃的方法,包括以下步骤:向粉末或颗粒状的聚烯烃中加入式(I)的重氮化合物N═N═N—X—R—X—N═N=N,其中R表示具有3至20个碳原子的芳基、烷基或芳基烷基,X表示—CO—、—O—CO—SO2-、—PO2-、—PO3—或-Si(═O)—;向聚烯烃中加入式(II)的过氧化物化合物R1-X1-OO—X2—R2,其中R1和R2相同或不同,表示氢、具有3至20个碳原子的芳基、烷基或芳基烷基,且可包含进一步的过氧化物基团,其中R1和R2之一可以形成环,X1和X2相同或不同,表示直接键、—CO2—或—CO—;混合产品以获得混合物;在挤出机中挤出混合物,在高于式(I)的重氮化合物和式(II)的过氧化物化合物的分解温度的温度下进行。