The hottest Tongji University invented a new type

2022-08-14
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Tongji University invented a new type of waterborne epoxy resin coating

Tongji University invented a new type of waterborne epoxy resin coating

August 25, 2005

researchers at Tongji University in Shanghai recently invented a new type of waterborne epoxy resin coating, which is composed of epoxy resin lotion and waterborne epoxy resin curing agent. It has good stability, wear resistance, long application period and high film hardness

epoxy resin coating is a kind of high-performance coating, which should be widely used. It has a variety of advantages, including strong adhesion with various base courses, high hardness of the coating, good water and chemical resistance, good wear resistance, etc. it can be used as ground coating, metal antirust primer, ship coating, etc. However, at present, the vast majority of epoxy resin coatings are solvent based coatings, which contain a large amount of volatile organic compounds (VOC), which are toxic and flammable, thus causing harm to the environment and human body. With the increasing requirements for environmental protection, the voice for reducing VOC or even VOC free coatings is rising day by day

according to experts from China epoxy resin industry association, the new waterborne epoxy resin coating is a high-performance two-component coating, which is composed of epoxy resin lotion and waterborne epoxy resin curing agent. Among them, epoxy resin lotion is prepared by emulsifying epoxy resin with reactive emulsifier. The amount of reactive emulsifier is 10 ~ 18% of the weight of epoxy resin, and the more appropriate amount is 12 ~ 15%. The reactive emulsifier is a polymer emulsifier formed by the reaction of epoxy resin and its surface active polyether diol in the presence of Lewis acid catalyst, with epoxy and hydroxyl end groups respectively, and the solid content is 40 ~ 60%; The epoxy resin can be bisphenol a low molecular weight or high molecular weight epoxy resin. Polyether diols, including ordinary people's doors and windows, dare not open polyethylene glycol, polypropylene glycol, polybutanol or their copolymers. The water-based epoxy resin curing agent is a water-soluble curing agent obtained by modifying the polyethylene polyamine through the sealed pendulum impact testing machine and the influence of the friction change in the electronic testing machine through the experimental end, addition and salifying process

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