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

A technology of epoxy resin and heavy phase material, applied in the field of chemistry, can solve the problems of low use efficiency of heavy phase, unstable quality, many unknown impurities, etc. Effect

Inactive Publication Date: 2013-12-04
上海美东生物材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

Embodiment 1

[0034] Such as figure 1 As shown, the present invention utilizes the cardanol heavy phase material in the production of cardanol to prepare epoxy resin method (1), according to the cardanol heavy phase material: epichlorohydrin: the molar ratio of strong base=1:1~ 10: The mass of 1-10 weighs each material, and the molar number of the cardanol heavy phase material is calculated according to the phenolic hydroxyl group in the cardanol heavy phase material, and then the cardanol heavy phase material is added into the reaction vessel, stirred, Introduce nitrogen to exhaust the air, then add epichlorohydrin after 1-5 minutes, continue to stir, control the temperature at 40-50 degrees Celsius, add strong alkali solution, raise the temperature to 70-100 degrees Celsius after the dropwise addition, and keep warm for 2-9 hours , add an organic solvent until all the above-mentioned substances dissolve into a uniform liquid, then wash with hot water for 3-8 times, the temperature of the ...

Embodiment 2

[0040]Method for preparing epoxy resin by using cardanol heavy phase material in cardanol production (2) Add cardanol heavy phase material (300g) and epichlorohydrin (138.78g) into a four-necked bottle, pass nitrogen protection, and raise the temperature to 45 degrees Celsius, and then slowly add a strong alkali aqueous solution (1mol) with a mass percentage concentration of 50% under stirring, so that the temperature is always controlled below 70 degrees Celsius, and after the addition is completed, stir at 75 degrees Celsius for 2-9 hours, add Dilute with solvent until the above substances are all dissolved into a uniform liquid, then wash with hot water for 3-8 times, and distill under reduced pressure to obtain a black oily liquid, which is the prepared product. The solid content of the obtained product is 90-100%, and the viscosity is 200 ~580000mPa.S (25℃), epoxy value 0.10~0.35eq / 100g.

[0041] Further, the organic solvent is xylene, toluene or methanol.

[0042] Furth...

Embodiment 3

[0045] Through curing with MD1041 produced by Shanghai Meidong Biomaterials Co., Ltd., it is found that compared with bisphenol A epoxy resin E20, the above product has no decline in performance except for the darker color. For example, in terms of hardness, E20 is the same as Shanghai Meidong The Shore hardness of MD1041 produced by East Biomaterials Co., Ltd. is 10-20 after curing, and the product with an epoxy value of 0.20 and epoxy resin curing agent MD1041 has a Shore hardness of 15-30 after curing. The test condition is that the resin and curing agent are evenly mixed and cured at room temperature (25°C) for 7 days.

[0046] Wherein the cardanol heavy phase material epoxy basic data used are as follows:

[0047] project

[0048] Cardanol heavy phase epoxy and MD1041 basic data after curing:

[0049] project

[0050] Matching ratio

[0051] The Shore hardness is 23 after being cured with the same ratio as MD1041. Compared with epoxy resin...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/06
Inventor 黎明黎炘毕丽杰宋学良
Owner 上海美东生物材料股份有限公司
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