Study on Chromaticity Variation Relationships of Rosin under High Temperature Treatment

Abstract:

The color-lightening of rosin was achieved to give light-colored and qualified rosin that was improved at the optimal conditions for 4 Gardner color grades, while rosin was treated at 180 ~ 270 °C for 1 ~ 4 h in inert gases. The color of rosin was deepened slightly at the initial, and then gradual lightened with the increase of treating temperature. The best color-lightening effect was observed from Pinus massoniana rosin. The acid number and softening point of rosin tended to decrease both accompanying with the color-lightening. According to a general consideration on main requirements such as color, acid number, softening point and the others, the suitable treating conditions for rosin color-lightening were suggested to be as temperature 240 ~ 260 °C and time 1 ~ 3 h.

• Periodical: Advanced Materials Research (Volumes 396-398)
• Pages: 1157-1163
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.396-398.1157
• Online since: November 2011
• Authors: Yan Gu, Yu Xiang Chen, Zhen Dong Zhao, Chang Tai Guo, Dong Mei Li, Liang Wu Bi
• Keywords: Chromaticity, Color-Lightening, High Temperature Treatment, Rosin

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