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Prepn of high-boiling alcohol lignin epoxy resin

A technology of high-boiling alcohol lignin and plain epoxy resin, which is applied in the field of epoxy resin manufacturing industry, can solve the problems of adverse effects of epoxy resin properties, structural changes of natural lignin, reduction of chemical activity, etc., and achieves good modification effect. , The effect of increasing softness and high purity

Inactive Publication Date: 2005-07-13
FUZHOU UNIV
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Problems solved by technology

[0002] There is a precedent for using lignosulfonate as a raw material in previous research reports on the preparation of epoxy resins, but lignosulfonate is extracted from traditional papermaking "black liquor", which not only contains high impurities, but also plants The natural lignin in the raw material undergoes major structural changes after cooking with alkali and sulfite, and its chemical activity is significantly reduced
To prepare epoxy resin, it is necessary to go through complicated modification and purification processes such as acidification and phenolization modification, and then react with epichlorohydrin to obtain lignin epoxy resin, and it will have a relatively large impact on the performance of epoxy resin. big adverse effect

Method used

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  • Prepn of high-boiling alcohol lignin epoxy resin

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Embodiment 1

[0028] 1. Measure 21ml of epichlorohydrin, add it to a clean 250ml three-neck flask (in the container), weigh 5 grams of high-boiling alcohol lignin, pour it into the flask container, heat up to 50°C, stir for 30min, let the high-boiling alcohol Fully dissolve and mix lignin and epichlorohydrin, add 0.8ml of 30% NaOH solution within 20 minutes, heat up to 55-60°C, stir and reflux for 1 hour, heat up to 70°C, and add 2ml of 30% within 20 minutes NaOH solution, then stirred and refluxed for 1 hour, and the excess epichlorohydrin was evaporated under reduced pressure to obtain 10ml of epichlorohydrin and a brown solid that was insoluble in water and had certain elasticity, and was washed and dried to obtain 10.25 grams of high-boiling alcohol Lignin epoxy resin.

[0029] 2 Effects of different additions of epichlorohydrin on the synthesis ratio, yield and epoxy value of lignin-based epoxy resin

[0030] According to the ratio in Table 1-1, first measure epichlorohydrin and add i...

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Abstract

The present invention is preparation process of epoxy resin with high-boiling alcohol lignin and its derivative. High-boiling alcohol lignin or its derivative is dissolved in chloropropylene oxide solution or the mixed solution of chloropropylene oxide and organic solvent through stirring and heating, and the mixture is reacted completely via adding catalyst and heating to prepare epoxy resin. The preparation process is simpler compared with traditional lignin epoxy resin, and the present invention has low cost, simple preparation process and high product performance.

Description

Technical field: [0001] The present invention relates to epoxy resin manufacturing industry, and the present invention relates to the process and formula of using high boiling alcohol lignin and its derivatives as the main raw material of lignin epoxy resin. Background technique: [0002] There is a precedent for using lignosulfonate as a raw material in previous research reports on the preparation of epoxy resins, but lignosulfonate is extracted from traditional papermaking "black liquor", which not only contains high impurities, but also plants The natural lignin in the raw material undergoes major structural changes after cooking with alkali and sulfite, and its chemical activity is significantly reduced. To prepare epoxy resin, it is necessary to go through complicated modification and purification processes such as acidification and phenolization modification, and then react with epichlorohydrin to obtain lignin epoxy resin, and it will have a relatively large impact on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/02
Inventor 程贤甦陈为键方华书陈跃先
Owner FUZHOU UNIV
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