Study On Synthesis Of Waterborne Acrylate Resin And Their Modification

Waterborne Acrylate resin has some advantages, such as good glossiness, weather-resistant, chemical resistance, stabilization, non-contamination, nontoxicity, non-skin irritation, low price and safety of production, and become an green environ-mental product of low VOC. So it will be an attractive research and application areas. But it also has some disadvantages, such as high film forming temperature, low hardness, poor anti-after tack, poor water-resistant, low adhesion, etc. So the high performance acrylate polymer resin which can overcome those disadvantages will become research hotspot at present.In this paper, the water-souble Acrylate resin could be prepared by solution polymerization with Acrylate monomers, and make preliminary discussion on synthesis techniques. And then, in order to improve the disadvantages and enhance synthetic properties of copolymer, Epoxy acrylate resin which has high hardness, adhesion, good water-resistant could be used for modifying it.On the experiment of EA modification, many factors such as different feed ways, reaction temperature, Initiator, EA content, etc, on the polymerization and property of product were discussed. The results show that the copolymer of EA modify acrylate resin could be favorably prepared and the conversion rate of monomers is greater than 96%,when the multistep feeding is used, the reaction temperature is 82°C,the stirring rate is 150r/min~200r/min and the reaction time is 4h.Meanwhile,when the content of EA is 8% and NMA is 2%,the properities of copolymer is optimal, the hardness of film is 2H, the anti-after tack is level 1,the adhesion strength is level 2 and the water-resistant is 96h.Besides, from the structure design consideration the "core-shell" structure emulsion could be prepared by emulsion polymerization and it can greatly the performances of acrylate emulsion. Meanwhile many factors such the designs of different "core-shell" structures, the emulsifiers, etc, were discussed. The results show that the high performance heat-curing Acrylate emulsion could be favorably attained and the hardness of film is 2H, the anti-after tack is level 1, the adhesion strength is level 2 and the water-resistant is 96h, when the design of soft core-hard shell structure was used, the percentage of emulsifiers are 3%(ratio of anionic/non-emulsifiers are 1/2) and NMA is 2%.