Cardanol-Based Polyurethane Coatings via Click Chemistry:An Eco-friendly Approach  

作　　者：Kunal Wazarkar Anagha Sabnis 

机构地区：[1]Department of Polymer and Surface Engineering,Institute of Chemical Technology,Nathalal Parekh Marg,Matunga(E),Mumbai-400019,India

出　　处：《Journal of Renewable Materials》2018年第5期517-528,共12页可再生材料杂志（英文）

摘　　要：This research work discloses the preparation of polyurethane coatings from cardanol modified using thiolene chemistry,wherein unsaturated long alkyl chain of cardanol was successfully utilized via thiol-ene click reaction to synthesize polyol.For this purpose,cardanol and thioglycerol was reacted in the presence of Irgacure 184(photoinitiator)and 1,8-Diazabicyclo[5.4.0]undec-7-ene(catalyst)and exposed to UV light for 12 h at 80℃.One mole of thioglycerol was successfully added across the double bond of fatty chain of cardanol and confirmed by chemical and spectroscopic analysis.Further,the polyol thus prepared was cured with various polyisocyanates,viz.,N-75(HDI based),L-67/BA(TDI based),Z-4470(IPDI based)and corresponding polyurethane coatings were developed.The coatings were then analyzed for mechanical,chemical,optical,thermal and anticorrosive properties.It was observed that cardanol-based PU coatings exhibited excellent mechanical,chemical and thermal and anticorrosive properties as compared to that of commercial acrylic-PU coatings.

关 键 词：THIOL-ENE click chemistry POLYURETHANE ANTICORROSIVE ultraviolet light 

分 类 号：TG1[金属学及工艺—金属学]