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Chemistry and Industry of Forest Products ›› 2019, Vol. 39 ›› Issue (3): 101-107.doi: 10.3969/j.issn.0253-2417.2019.03.014

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Preparation of High-efficient Tung Oil Drier and Its Drying Performance

Yun YU,Ningning YANG,Bin HUANG,Yan YANG,Youwei LIAO*()   

  1. College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
  • Received:2019-01-27 Online:2019-06-28 Published:2019-06-26
  • Contact: Youwei LIAO E-mail:248783659@qq.com
  • Supported by:
    国家重点研发计划(2017YFD0600703-6);湖南省教育厅科学研究项目(17C1641);中科院可再生能源重点实验室开放基金项目(Y701k81001);湖南省林业科技计划项目(XLK201636)

Abstract:

The effects of four kinds of driers, namely rare earth isooctanoate(REI), cobalt isooctanoate(CI), high-efficient drier M2203 and CQ-150B alone or in combination on the drying performance of tung oil and polymerized tung oil were investigated. The experimental results showed that the viscosity of polymerized tung oil at 10℃ was 15 520 mPa·s and higher than that of tung oil(160 mPa·s). The drying time of polymerized tung oil at 20℃ was 72 h and shorter than that of tung oil(168 h). When 0.6% of REI was used together with 0.010% of CI, the surface drying time and hard drying time of raw tung oil were 2 and 2.5 h, respectively, the hardness grade was 4 H, and the adhesion grade was 1; the surface drying time and hard drying time of polymerized tung oil were 0.67 and 1 h, hardness grade was 5 H, adhesion was grade 1. Compared with the high-efficient drier M2203 and CQ-150B drier, the composite drier had light color and good compatibility with tung oil. FI-IR and TGA analysis showed that the tung oil paint film prepared by drying with compound drier had high cross-linking degree and good heat stability. So the compound drier was proved to be an excellent tung oil drier.

Key words: tung oil, rare earth isooctanoate, cobalt isooctanoate, curing

CLC Number: