Method for making mixed high purity (meth)acrylic anhydrides
    1.
    发明授权
    Method for making mixed high purity (meth)acrylic anhydrides 失效
    混合高纯度(甲基)丙烯酸酐的方法

    公开(公告)号:US06346650B1

    公开(公告)日:2002-02-12

    申请号:US09601240

    申请日:2000-07-31

    IPC分类号: C07C5156

    CPC分类号: C07C68/02 C07C69/96

    摘要: The invention concerns a method consisting in making a mixed (meth)acrylic anhydride of formula (I) by reacting an alkaline (meth)acrylate of formula (II) and a chloroformate of formula (III), carrying out said reaction in an aqueous medium and in the absence of amines, the mol ratio chloroformate (III)/alkaline (meth)acrylate (II) being at least equal to 1.15. R1 represents H or CH3; R2 represents an alkyl, alkenyl, aryl, alkaryl or aralkyl residue; and M is an alkaline metal.

    摘要翻译: 本发明涉及通过使式(II)的碱式(甲基)丙烯酸酯与式(III)的氯甲酸酯在水性介质中进行所述反应而制备式(I)的混合(甲基)丙烯酸酐的方法 在不存在胺的情况下,氯甲酸酯(III)/碱性(甲基)丙烯酸酯(II)的摩尔比至少等于1.15。 R1表示H或CH3; R 2表示烷基,烯基,芳基,烷芳基或芳烷基残基; M是碱金属。