Paint & Coatings Industry >

2026 , Vol. 56 >Issue 5: 39 - 46

DOI: https://doi.org/10.12020/j.issn.0253-4312.2025-298

Green and Low-carbon

Preparation and Properties of Tung Oil-based Waterborne UV-curable Latex Coatings

  • LI Danni ,
  • SHEN Daohai ,
  • RONG Liping ,
  • LI Kexin ,
  • LI Zhiguo
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  • 1. College of Material Science and Engineering，Northeast Forestry University，Harbin 150040，China；
    2. Hangzhou Dasuo Technology Co.，Ltd.，Hangzhou 311251，China；

    3. Institute of Petrochemistry Heilongjiang Academy of Sciences，Harbin 150040，China


Online published: 2026-01-19

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Abstract

［Objective］Solve the problems of slow film formation and low adhesion of tung oil-based waterborne coatings.［Methods］A method for preparing UV-curable tung oil-based waterbornelatex coatings was proposed by using double bond functionalized tung oil and polyvinyl acetatelatex/polystyrene（PVAc/PS） core-shell latex via external emulsification composite. By utilising themorphological effects of core-shell latex particles to accelerate the film-forming and water-drainageprocesses of the latex，and combining this with the UV-curing properties of modified tung oil，the curing rate and film properties of the waterborne latex were improved.［Results］Taking pentaerythritol triacrylate（PETA）modified tung oil composite latex as the research object，after adjusting the water-oil ratio and optimizing the emulsifier dosage，combined with particle size distribution and microstructure analysis，it was found that when the emulsifier addition amount was 6% and the water-oil ratio was 7∶3，the latex exhibited uniform particle size dispersion and excellent stability. UV-curingperformance tests showed that high oil phase or high emulsifier addition amount could shorten thecuring time，rapid UV-curing could be achieved in as fast as 22 seconds，and the UV-curing efficiencywas excellent. When the oil phase proportion was high or the emulsifier content was high，the peak value of the stress-strain curve of the paint film was high，the adhesion was stably maintained at level 1 or 0，and at the same time，the gloss was improved and the roughness was reduced.［Conclusion］ Through the coordinated control of the water-oil ratio and emulsifier，tung oil-based waterborne latex coatings with good dispersion stability，rapid UV-curing and adjustable film properties can be prepared，providing technical support for the application of natural vegetable oil-based environmentallyfriendly coatings.

Key words： tung oil; waterborne latex coating; UV-curing

Cite this article

LI Danni , SHEN Daohai , RONG Liping , LI Kexin , LI Zhiguo . Preparation and Properties of Tung Oil-based Waterborne UV-curable Latex Coatings[J]. Paint & Coatings Industry, 2026 , 56(5) : 39 -46 . DOI: 10.12020/j.issn.0253-4312.2025-298

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