Method for preparing epoxy resin by heavy-phase materials in cardanol production

Abstract

The invention relates to a method for preparing epoxy resin by heavy-phase materials in cardanol production. The method includes weighing substances according to mass that a molar ratio, among the cardanol heavy-phase materials, epichlorohydrin and alkali, is 1:1-10:1-10, then adding the cardanol heavy-phase materials into a reaction vessel, stirring, feeding in nitrogen and exhausting air, adding the epichlorohydrin after 1-5 minutes, continuing stirring, controlling the temperature within a range of 40-50 DEG C, adding an alkali solution, finishing dropwise adding prior to increasing the temperature to 70-100 DEG C, keeping the temperature for 2-9 hours, adding organic solvent for dissolution prior to washing with hot water, and performing reduced pressure distillation to obtain black oily liquid, namely a prepared product. The epoxy resin obtained through the method is 0.10-0.35eq/100g in epoxy value, good in curing performance and convenient to use.

Description

technical field [0001] The invention relates to the field of chemistry, in particular to macromolecular compounds, in particular to epoxy resins, and in particular to a method for preparing epoxy resins from heavy phase materials in the production of cardanol. Background technique [0002] All polymer compounds containing epoxy groups in their molecular structure are collectively referred to as epoxy resins. The cured epoxy resin has good physical and chemical properties. It has excellent bonding strength to the surface of metal and non-metal materials, good dielectric properties, small shrinkage rate, good dimensional stability and high hardness. It has good flexibility and is stable to alkali and most solvents, so it is widely used in various sectors of national defense and national economy for casting, impregnating, laminating, adhesive, coating and other purposes. [0003] In the prior art, bisphenol A epoxy resins are widely used, and bisphenol A epoxy resins with an e...

AI Technical Summary

Problems solved by technology

[0005] As a by-product of the production of cardanol, the heavy phase material has a large amount of production. If it is not handled properly, it will cause environmental damage and waste. It is a pity. Therefore, the development of new uses for the heavy phase is very urgent.

However, due to the difference in the production process of cardanol, the viscosity of the heavy phase varies greatly, with a viscosity span of 300-1,000,000mPa.S, and the quality is not stable, there are many unknown impurities, and there are insolubles in toluene, so its development and application have great obstacles

However, in the prior art, the deep processing methods for heavy phase materials are limited, and the utilization amount and application range are greatly restricted, resulting in low efficiency of heavy phase use, and sometimes even having to be discarded directly, which not only causes damage to the environment, but also produces huge waste

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