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Synthesis of unsaturated cycloexanone formaldehyde resins and their UV-curing behavior with thiols
Xu Peng,Li Chaofeng,Chang Xinwei,Zhang Yanwu *
School of Chemical Engineering and Energy, Zhengzhou University, ZhengZhou 450001
*Correspondence author
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Funding: National Natural Science Foundation of China（No.21574119）
Opened online: 3 April 2019
Accepted by: none
Citation: Xu Peng,Li Chaofeng,Chang Xinwei.Synthesis of unsaturated cycloexanone formaldehyde resins and their UV-curing behavior with thiols[OL]. [ 3 April 2019] http://en.paper.edu.cn/en_releasepaper/content/4748131
 
 
The water-soluble cyclohexanone formaldehyde resins (CFR) are synthesized using the rehydrated magnesium-aluminum hydrotalcite as the catalyst and double bonds are introduced by capping the chain ends with 5-norbornene-2,3-dicarboxylic anhydride. Through monitoring the conversion of double bonds with FT-IR, the UV-curing behavior of unsaturated CFR in the presence of pentaerythritol tetra (3-mercaptopropionate) is studied. The results show that the conversion of double bonds can reach to 64.1% at 0.66 mW/cm2 of UV light intensity when the molar ratio of double bonds to sulfhydryl groups is 1:1 in the presence of benzoin dimethyl ether (1% of molar amount of double bonds). The UV-curing kinetics conforms to the diffusion control model similar to the thermo-curing model of amine-epoxy.
Keywords:Thiol-ene click reaction, Unsaturated cyclohexanone formaldehyde resins; UV-curing
 
 
 

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