Depression of the glass transition temperature of polyolefins containing
cyclic monomers
    10.
    发明授权
    Depression of the glass transition temperature of polyolefins containing cyclic monomers 失效
    抑制含聚烯烃的环状单体的玻璃化转变温度

    公开(公告)号:US5981643A

    公开(公告)日:1999-11-09

    申请号:US947999

    申请日:1997-10-09

    摘要: Copolymers of ethylene and a cyclic olefin, preferably a fused ring cyclic olefin (FRCO), optionally containing an alpha-olefin and/or a non-conjugated diene, display increasing glass transition temperatures (T.sub.g) as the amount of FRCO in the copolymer increases. This increase brings these polymers quickly above a T.sub.g acceptable as elastomers. Addition of specially selected process oils, based on cohesive energy densities of both the copolymer and the process oil, is shown to lower T.sub.g to a range acceptable for elastomers e.g. below about -30.degree. C. The copolymer/process oil combination can then be used in elastomer compounding operations and behave in typical elastomer fashion.

    摘要翻译: 随着共聚物中FRCO的量增加,乙烯和环烯烃,优选稠环环烯烃(FRCO),任选含有α-烯烃和/或非共轭二烯的共聚物显示出增加的玻璃化转变温度(Tg) 。 这种增加使这些聚合物快速地高于作为弹性体可接受的Tg。 基于共聚物和工艺油的内聚能量密度添加特别选择的加工油,显示出将Tg降低至弹性体可接受的范围。 低于约-30℃。共聚物/加工油组合然后可用于弹性体复合操作中,并以典型的弹性体形式表现。