Process for the production of polyisoolefins
    2.
    发明授权
    Process for the production of polyisoolefins 失效
    生产聚异烯烃的方法

    公开(公告)号:US5543479A

    公开(公告)日:1996-08-06

    申请号:US508237

    申请日:1995-07-27

    摘要: Polyisoolefins are produced according to the invention by polymerizing isoolefins having 4 to 16 carbon atoms, optionally with conjugated diolefins having 4 to 6 carbon atoms and/or cationically polymerizable, mono- or polyunsaturated, organic compounds having 4 to 16 carbon atoms in the presence of mixtures of carbon dioxide and linear, branched and/or cyclic C.sub.4 -C.sub.8 alkanes and in the presence of catalysts at temperatures of -70.degree. C. to +20.degree. C. and pressures of 1 to 70 bar, wherein the weight ratio of carbon dioxide to alkanes is 10:90 to 90:10.The process according to the invention largely prevents the formation of fouling on the reactor walls, so ensuring better removal of heat. Moreover, in accordance with the process according to the invention, the polyisoolefins obtained may be directly chemically modified once the carbon dioxide has been removed.

    摘要翻译: 根据本发明通过聚合具有4至16个碳原子的异烯烃,任选地具有4至6个碳原子的共轭二烯烃和/或具有4至16个碳原子的阳离子可聚合的单或多不饱和有机化合物在根据本发明的情况下, 二氧化碳和线性,支化和/或环状C 4 -C 8烷烃的混合物,并且在催化剂存在下,在-70℃至+ 20℃的温度和1至70巴的压力下,其中碳的重量比 二氧化碳至烷烃为10:90至90:10。 根据本发明的方法大大地防止在反应器壁上形成结垢,从而确保更好地除去热量。 此外,根据本发明的方法,一旦二氧化碳被除去,所获得的聚异戊烯可以直接化学改性。