申请人:Tokuyama Corporation
公开号:EP2502945A1
公开(公告)日:2012-09-26
A process of producing a urethane (meth)acrylate monomer having a low acid value and a low content of a hardly soluble high-molecular weight impurity which is crosslinked high-dimensionally, comprising the steps of:
(1) contacting a first solution containing a urethane (meth) acrylate monomer having an acid value of more than 0.2 mgKOH/g and an organic solvent to a water-containing adsorbent capable of adsorbing an acid component to obtain a second solution containing a urethane (meth)acrylate monomer having an acid value of not more than 0.2 mgKOH/g, the organic solvent and more than 5,000 ppm (mass) of water based on the urethane (meth)acrylate monomer;
(2) contacting the second solution to a dehydrating agent to obtain a third solution containing not more than 5,000 ppm (mass) of water based on the urethane (meth)acrylate monomer; and
(3) removing the organic solvent from the third solution.
一种生产具有低酸值和低含量难溶性高分子量杂质的高维交联聚氨酯(甲基)丙烯酸酯单体的工艺,包括以下步骤:
(1) 将含有酸值大于 0.2 mgKOH/g 的聚氨酯(甲基)丙烯酸酯单体和有机溶剂的第一溶液与能够吸附酸组分的含水吸附剂接触,以获得含有酸值不大于 0.2 mgKOH/g 的聚氨酯(甲基)丙烯酸酯单体、有机溶剂和基于聚氨酯(甲基)丙烯酸酯单体的超过 5,000 ppm(质量)的水的第二溶液;
(2) 将第二种溶液与脱水剂接触,以获得第三种溶液,该溶液含有不超过 5,000 ppm(质量)的水(基于氨基甲酸酯(甲基)丙烯酸酯单体);以及
(3) 从第三种溶液中去除有机溶剂。