METHOD FOR PREPARING POLY(1,4-CYCLOHEXANE-DICARBOXYLATES)
    2.
    发明授权
    METHOD FOR PREPARING POLY(1,4-CYCLOHEXANE-DICARBOXYLATES) 有权
    用于生产聚(1,4-环己烷)

    公开(公告)号:EP1175455B1

    公开(公告)日:2005-10-05

    申请号:EP00913647.4

    申请日:2000-02-28

    IPC分类号: C08G63/199

    摘要: Polyesters such as poly(1,4-cyclohexanedimethyl-1,4-cyclohexanedicarboxylate) are prepared by the reaction of at least one relatively non-volatile diol, preferably 1,4-cyclohexanedimethanol, with a 1,4-cyclohexanedicarboxylic acid ester in the presence of a catalyst such as a tetraalkyl titanate. Maximum molecular weight and crystallinity are provided by at least one of two options: conducting the reaction at a series of progressively increasing temperatures below 265 DEG C, with a residence time in the range of 40-120 minutes at temperatures above 250 DEG C; and conducting an initial stage of the reaction in the presence of at least one C2-6 aliphatic diol such as ethylene glycol, diethylene glycol or 1,4-butanediol.

    METHOD FOR PREPARING POLY(1,4-CYCLOHEXANE-DICARBOXYLATES)
    4.
    发明公开
    METHOD FOR PREPARING POLY(1,4-CYCLOHEXANE-DICARBOXYLATES) 有权
    用于生产聚(1,4-环己烷)

    公开(公告)号:EP1175455A2

    公开(公告)日:2002-01-30

    申请号:EP00913647.4

    申请日:2000-02-28

    IPC分类号: C08G63/199

    摘要: Polyesters such as poly(1,4-cyclohexanedimethyl-1,4-cyclohexanedicarboxylate) are prepared by the reaction of at least one relatively non-volatile diol, preferably 1,4-cyclohexanedimethanol, with a 1,4-cyclohexanedicarboxylic acid ester in the presence of a catalyst such as a tetraalkyl titanate. Maximum molecular weight and crystallinity are provided by at least one of two options: conducting the reaction at a series of progressively increasing temperatures below 265 °C, with a residence time in the range of 40-120 minutes at temperatures above 250 °C; and conducting an initial stage of the reaction in the presence of at least one C2-6 aliphatic diol such as ethylene glycol, diethylene glycol or 1,4-butanediol.