Process for producing a modified polypropylene and a molded product
    3.
    发明授权
    Process for producing a modified polypropylene and a molded product 失效
    生产改性聚丙烯和模塑制品的方法

    公开(公告)号:US5560886A

    公开(公告)日:1996-10-01

    申请号:US425554

    申请日:1995-04-20

    摘要: A process for producing a modified polypropylene having a very high melt tension and superior stiffness and moldability, and a molded product obtained by using the modified polypropylene are provided.which process includes adding 0.05 to 10 millimols of a cross-linking auxiliary to 100 g of a linear polypropylene, mixing them, irradiating ionizing radiations to the mixture so as to give an absorbed dosage of 1 to 20 kGy, and successively heat-treating the resulting material at 80.degree. to 350.degree. C.,which modified polypropylene has(A) a degree of branching of substantially 1,(B) a relationship between its melt tension (MS) at 230.degree. C. and its intrinsic viscosity (.eta.) measured in tetralin at 230.degree. C. expressed by an inequalitylog (MS)>4.24.times.log [.eta.]-0.915, and(C) a percentage of extraction residue in boiling xylene of 1% by weight or less.

    摘要翻译: 提供了具有非常高的熔融张力和优异的刚度和成型性的改性聚丙烯的制造方法和使用改性聚丙烯得到的成型体。 该方法包括向100g线型聚丙烯中加入0.05-10毫摩尔的交联助剂,混合它们,向混合物中照射电离辐射,以得到1至20kGy的吸收剂量,并依次热处理 该改性聚丙烯具有(A)基本上为1的支化度,(B)230℃下的熔体张力(MS)与其特性粘度(η)之间的关系, 在不饱和度(MS)> 4.24xlogη-0.915表示的230℃下测量的四氢化萘,(C)沸腾二甲苯中提取残余物的百分比为1重量%以下。