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Konjac fly powder based epoxy resin, preparation method thereof and coating prepared from konjac fly powder based epoxy resin

A technology of konjac flying powder and epoxy resin, which is applied in epoxy resin coatings, anti-corrosion coatings, coatings, etc., can solve problems such as threats to the health of living bodies, and achieve the effects of accelerating curing time, high mechanical strength, and improving comprehensive performance

Active Publication Date: 2016-07-13
SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, it has been reported that bisphenol A poses a great threat to the health of living organisms.

Method used

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  • Konjac fly powder based epoxy resin, preparation method thereof and coating prepared from konjac fly powder based epoxy resin
  • Konjac fly powder based epoxy resin, preparation method thereof and coating prepared from konjac fly powder based epoxy resin
  • Konjac fly powder based epoxy resin, preparation method thereof and coating prepared from konjac fly powder based epoxy resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Take 100 grams of konjac powder and 600 g of phenol into a 1500 ml three-neck flask equipped with a condenser and a stirrer, stir at 100 ° C and add 3 g of concentrated sulfuric acid dropwise, react for 2 hours, cool to room temperature, filter, and the residue rate is 3.8% . The filtrate is neutralized with anhydrous magnesium oxide, filtered, and the unreacted phenol is removed under reduced pressure to obtain the liquefaction product of konjac flying powder.

Embodiment 2

[0044] Add 100g of the liquefied product of konjac flying powder, 185g of epichlorohydrin and 1g of tetrabutylammonium bromide to a four-necked flask equipped with electric stirring, condenser, thermometer and dropping funnel, react at 120°C for 4h, and reduce Remove unreacted epichlorohydrin under pressure. Add 500ml of toluene to the remaining product to dissolve, add 84g of 30% sodium hydroxide aqueous solution dropwise at room temperature, continue the reaction for 4h after the dropwise addition, filter after the reaction, wash the filtrate with deionized water until neutral, dry and remove the solvent under reduced pressure That is to obtain konjac flying powder-based epoxy resin with an epoxy value of 0.29 and a viscosity of 3000-4000 cps (25° C.).

Embodiment 3

[0046] Konjac fly powder epoxy resin 100g obtained by the method of embodiment 2, modified serpentine nanotube 5g, bisphenolic acid type hyperbranched epoxy resin (HBPE-1, performance is shown in Table 1) 5g, cardanol base Add 15g of epoxy glycidyl ether into the disperser. After the resin is evenly dispersed, add 0.3g of wetting and dispersing agent TEGODispers710, 0.5g of leveling agent TEGOGlide411, 0.5g of defoamer TEGOAirex931, and then disperse evenly, then add 10g of quartz powder, 5g of titanium dioxide and 5g of ultra-fine mica powder are uniformly dispersed at high speed, sanded by a sand mill to reach the required fineness (50μm) and discharged to obtain component A.

[0047] Then, add 100 g of cardanol phenalkamine curing agent (ie, component B) to component A, mix and stir evenly, and obtain the solvent-free room temperature curing nano-anticorrosion coating of the present invention. The anti-corrosion coating film has fast drying time, strong adhesion, good flexi...

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Abstract

The invention discloses konjac fly powder based epoxy resin, a preparation method thereof and a coating prepared from the konjac fly powder based epoxy resin. The preparation method of the konjac fly powder based epoxy resin comprises steps as follows: firstly, konjac fly powder and phenol are subjected to a reaction, a konjac fly powder liquefied product is obtained and is subjected to a reaction with epichlorohydrin and sodium hydroxide sequentially, and the konjac fly powder based epoxy resin is obtained. The konjac fly powder based epoxy resin is uniformly mixed with diphenolic acid type hyperbranched epoxy resin, modified chrysotile nanotubes, cardanol based glycidyl ether, pigments, filler, a defoaming agent, a leveling agent and a wetting dispersant, a mixture is cured with a cardanol phenol-aldehyde amine curing agent, and the solvent-free room temperature cured anticorrosive nano-coating is obtained. The solvent-free room temperature cured anticorrosive nano-coating containing the konjac fly powder based epoxy resin has a smooth and attractive surface and good wear resistance, pressure resistance, impact resistance and chemical resistance, the production and the construction are simple, convenient and environment-friendly, the cost is low, the requirement of actual production is met, and remarkable economic benefits are obtained.

Description

technical field [0001] The invention relates to the field of bio-based polymer resins, in particular to a konjac flying powder-based epoxy resin, a preparation method thereof and a coating prepared by using the same. Background technique [0002] Konjac (Amorphophalmskonjac), also known as konjac, flower stem lotus, araceae, etc., is a perennial herb of the family Araceae. China is the world's largest producer of konjac, and the leftovers of the main processed product konjac powder (abbreviated as fine powder) is konjac flying powder (abbreviated as powder), accounting for 30% to 40% of the fine powder quality. Konjac flying powder contains astringent substances, and its palatability is very bad. It has not been directly used by the food industry. A very small part of the flying powder is sold as low-priced feed or desiccant, and most of it is discarded. This is not only a waste of resources, but also It also pollutes the environment. Therefore, how to solve the limiting f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D7/12C09D5/08C08G59/04
CPCC08G59/04C08K2201/011C08L2205/025C08L2205/03C09D5/08C09D7/63C09D7/65C09D163/00C08L63/00C08L87/00C08K9/04C08K7/00C08K3/34
Inventor 张俊珩胡凯丽周继亮张道洪王秋凡李婷程娟张爱清
Owner SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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