Preparation and Study on Pr operties of Castor Oil based
Water pr oof UV- curable Water bor ne Polyurethane Coatings
Author information+
(School of Chemistry and Chemical Engineering/Key Laboratory for Green processing of Chemical Engineering of
Xinjiang Bingtuan/Key Laboratory for Chemical Materials of Xinjiang Uygur Autonomous Region/
Engineering Center for Chemical Materials of Xinjiang Bingtuan,Shihezi 832003)
Compared with solvent based coatings, the water resistance of UV- curable waterborne polyurethane is poorer. To solve
this problem, a kind of UV- curable waterborne polyurethane (UVWPU) whose backbone and end groups were both provided
with unsaturated double bonds were prepared by controlling the ratio of n(OH (CO)) and n(NCO), and using castor oil(CO)and
isophorone diisocyanate as the main materials. Particle size of UVWPU, water resistance, thermostability, and mechanical
properties of polyurethane films were studied. Experiment results showed that the particle size of UVWPU increased along with
n(OH (CO))/n(NCO) increase. In addition, water resistance, thermal stability and tensile strength of the films were all improved.
The water absorption were 8% when n (OH (CO))/n (NCO) were 0.38. Meanwhile, the weightlessness temperature T5% could
reach 280 ℃, the gel were 65%, and the tensile strength at break were 6.5 MPa. The gel ofcastor oil- based UVWPU films
were lower than other films, but their water resistance were better.
HAO Ning, WU Jianning, XING Wensi, ZHAO Chunmao, LIU Zhiyong.
Preparation and Study on Pr operties of Castor Oil based
Water pr oof UV- curable Water bor ne Polyurethane Coatings. Journal of Shihezi University. 2015, 33(5): 633-638 https://doi.org/10.13880/j.cnki.65- 1174/n.2015.05.020
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