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Company Name: Qingdao Kehai Biochemistry Co., Ltd

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    Home > News > Water-soluble itaconic acid epoxy ester synthesis of the new law
    Water-soluble itaconic acid epoxy ester synthesis of the new law - 2013-04-07 19:25:02
    Domestic materials industry emphasis on excellent material epoxy resin and its application research and development, there's a water-soluble itaconic acid epoxy ester resin synthesis of new technology available. The epoxy ester resin can be made into a new water-soluble epoxy grouting material.

    Researchers epoxy the Blue Xingxincailiao Wuxi Resin Factory, Zhejiang Guoguang Biochemistry itaconic acid (IA) as raw material, adding co-solvent heating up, the introduction of nitrogen, the addition of the catalyst, while dropping the epoxy resin and a small amount of co-solvent a mixture, heating the reaction was cooled, diluted, i.e. water-soluble itaconic acid epoxy ester resin solution. Followed by the preparation of water-soluble epoxy grouting material According to the China Association of epoxy resin industry experts, the preparation of water-soluble itaconic acid epoxy ester resin were added crosslinking agents, initiators, accelerators, retarders, water.

    Analysis and determination showed that the epoxy resin and itaconic acid in the presence of a catalyst for esterification, itaconic acid, and the molar ratio of the epoxy group is smaller than the different reaction occurs due to the type of monomer ratio: 1:1 Yui, only a portion of an epoxy group involved in the reaction, the resultant differential and after the water-soluble, and because not all molecules both ends of the double bond-containing preparation of the slurry was very slow curing or not curing, the product is not present experiment requires; itaconic acid and an epoxy group molar ratio is greater than or equal to 1:1, epoxy group, almost all participate in the reaction, each molecular chain ends are connected esterified carboxyl group and a double bond, and, in a very good solubility in water, The prepared slurry fast curing and performance, is ideal experimental product. Therefore, the reaction molar ratio of the epoxy resin and itaconic acid should be not less than 1:1. In actual operation, in order to guarantee the completion of the reaction, an epoxy group should be an appropriate excess of itaconic acid, select an epoxy group with itaconic acid molar ratio is preferably between 1:1.05 to 1:1.1.

    In the synthesis process, the reaction temperature is an important factor to influence the reaction process and the results. Studies show that the temperature 90 to 95 ° C, due to the lower temperature the reaction is very slow; when the temperature is greater than 100 ° C within 1 hour most of the epoxy group and a carboxyl group reacts faster reaction; when the temperature The reaction proceeds rapidly when the temperature is greater than 110 ° C, side reactions occur easily due to the reaction system in the presence of a large number of carboxyl and hydroxyl groups. Taking all these factors reaction temperature should be 100 to 105 ° C.

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