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林产化学与工业

林产化学与工业 ›› 2002, Vol. 22 ›› Issue (04): 37-39.

• 研究报告 • 上一篇    下一篇

浅色松香树脂的制备及浅色机理初探

曹德榕, 魏晓惠, 陈就记, 林莉, 徐社阳   

  1. 中国科学院, 广州化学研究所纤维素化学重点实验室, 广东, 广州, 510650
  • 收稿日期:2002-07-01 修回日期:1900-01-01 出版日期:2002-12-30 发布日期:2002-12-30

PREPARATION OF LIGHT-COLORED ROSIN ESTER AND STUDIES ON MECHANISM OF COLOR-LIGHTENING

CAO De-rong, WEI Xiao-hui, CHEN Jiu-ji, LIN Li, XU She-yang   

  1. LCLC, Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou 510650, China
  • Received:2002-07-01 Revised:1900-01-01 Online:2002-12-30 Published:2002-12-30

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摘要： 松香在新型催化剂(CLC)存在下与醇发生酯化反应,生成加纳色号2～4的浅色松香树脂。对反应前后松香成分分析发现:加入CLC反应后松香中的脱氢枞酸和氢化树脂酸含量从零增加到30%和22%,枞酸型树脂酸含量从86%下降到34%。不加CLC的对照实验中,没有脱氢枞酸和氢化树脂酸生成,枞酸型树脂酸含量变化不大。实验表明CLC在松香酯化反应过程中起了松香歧化反应的催化作用。由于歧化反应,使松香中枞酸型树脂酸含量降低是松香浅色的主要原因。

关键词: 浅色松香, 歧化松香, 枞酸型树脂酸

Abstract: Light colored rosin ester with Gardner color 2-4 was prepared by reacting rosin with alcohol in the presence of a new CLC catalyst.Analysis of the product showed that relative content of dehydroabietic acid and hydrogenated resin acids increased from 0 in rosin to 30% and 22% in rosin ester,respectively,and relative content of abietic type resin acids decreased from 86% to 34%.Contrast experiment without CLC showed that there were no products of dehydroabietic acid and hydrogenated resin acid in rosin ester,and relative content of abietic type resin acid did not change much.It was proved that CLC was a catalyst responsible for the disproportionation reaction of rosin.The decrease of abietic type resin acids through disproportionation was responsible for the color lightening effect on rosin ester.

Key words: light-colored rosin, disproportionated rosin, abietic-type resin acids

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