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Acrylic acid rosin and epoxy resin prepolymer and preparation method thereof

A technology of acrylic rosin epoxy resin and acrylic rosin, which is applied in the direction of chemical modification of natural resins, can solve the problems of short aliphatic chains and brittle cured products, and achieve the effects of improving weather resistance, increasing productivity and simple operation.

Inactive Publication Date: 2009-09-30
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned rosin-based epoxy resins all have a common shortcoming, that is, due to the relatively large rigid ring structure and short aliphatic chain in the structure, the cured product is relatively brittle.

Method used

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  • Acrylic acid rosin and epoxy resin prepolymer and preparation method thereof
  • Acrylic acid rosin and epoxy resin prepolymer and preparation method thereof
  • Acrylic acid rosin and epoxy resin prepolymer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Crush 100g of acrylic rosin, put it into a 500mL four-necked flask with a mechanical stirrer, a reflux condenser, a dropping funnel and a nitrogen conduit, introduce nitrogen for protection, heat it to melt, add 145g of triethylene glycol Diglycidyl ether (the ratio of acrylic rosin and triethylene glycol diglycidyl ether is 1:2), stir to make the system uniform, and then add 0.06wt% (calculated on acrylic rosin) of tetramethylammonium chloride As a catalyst, the reaction was stirred at a temperature of 160 ° C for 7 hours, and the reaction was stopped when the acid value of the reaction system was lower than 1 mgKOH / g. After cooling, a yellow viscous resin was obtained. After infrared analysis, there was 1722 cm -1 , 1132cm -1 , 1250cm -1 , 912cm -1 and 854cm -1 Isotactic absorption, epoxy value 0.17mol / 100g, viscosity (36°C) 14.2Pa·s, acid value 0.3mgKOH / g, number average molecular weight 4800.

Embodiment 2

[0028] Crush 100g of acrylic rosin, put it into a 500mL four-necked flask with a mechanical stirrer, a reflux condenser, a dropping funnel and a nitrogen conduit, introduce nitrogen for protection, heat it to melt, add 164g of polypropylene glycol dihydrate Glyceryl ether (the ratio of acrylic rosin to polypropylene glycol diglycidyl ether is 1:2), stir to make the system uniform, then add 0.01wt% (calculated on acrylic rosin) potassium hydroxide as a catalyst, at a temperature of 170 ° C The reaction was stirred for 9 hours, and the reaction was stopped when the acid value of the reaction system was lower than 1 mgKOH / g. After cooling, a yellow viscous resin was obtained. After infrared analysis, there was 1722 cm -1 , 1132cm -1 , 1250cm -1 , 912cm -1 and 854cm -1 Isotactic absorption, epoxy value 0.16mol / 100g, viscosity (36°C) 13.5Pa·s, acid value 0.2mgKOH / g, number average molecular weight 4200.

Embodiment 3

[0030] Crush 100g of acrylic rosin, put it into a 500mL four-necked flask with a mechanical stirrer, a reflux condenser, a dropping funnel and a nitrogen conduit, introduce nitrogen for protection, heat it to melt, add 125g of butanediol two Glycidyl ether (the ratio of acrylic rosin and butanediol diglycidyl ether substances is 1:2), stir to make the system uniform, then add 0.03wt% (calculated on acrylic rosin) triethylamine as a catalyst, at 130 The reaction was stirred at a temperature of ℃ for 5 hours, and the reaction was stopped when the acid value of the reaction system was lower than 1 mgKOH / g. After cooling, a yellow viscous resin was obtained. After infrared analysis, there was 1722 cm -1 , 1132cm -1 , 1250cm -1 , 912cm -1 and 854cm -1 Isotactic absorption, epoxy value 0.19mol / 100g, viscosity (36°C) 15.7Pa·s, acid value 0.6mgKOH / g, number average molecular weight 5400.

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Abstract

The invention discloses an acrylic acid rosin and epoxy resin prepolymer and a preparation method thereof. Acrylic acid rosin is molten, diglycidyl ether is added to the molten acrylic acid rosin and reacts with the same under the action of esterification catalyst at the reaction temperature of 120-200 DEG C until the acid number of the reaction system is lower than 10mgKOH / g, the product of reaction is cooled and the acrylic acid rosin and epoxy resin prepolymer is obtained. The acrylic acid rosin and epoxy resin prepolymer is prepared by cheap and available natural products, has excellent mechanical property and uvioresistant property, is especially suitable to manufacture outdoor weather-resisting electric engineering insulating material and can be used as weather-resisting epoxy adhesive, epoxy resin coating, hydrated epoxy coating and the like.

Description

technical field [0001] The invention relates to the field of epoxy resins, in particular to acrylic rosin epoxy resins and a preparation method thereof. Background technique [0002] Epoxy resin has excellent electrical properties, mechanical properties, corrosion resistance and chemical stability, so it is widely used in coatings, electronic appliances, composite materials and adhesives and other industries, but the general bisphenol A epoxy resin has a benzene ring. The structure has poor anti-ultraviolet performance and is not resistant to aging. [0003] At present, outdoor weather-resistant epoxy resins are mainly synthesized by the reaction of cyclohexyl compounds (such as cyclohexanediol, cyclohexanedioic acid, hydrogenated bisphenol A, etc.) The obtained cycloaliphatic epoxide. Because there is no benzene ring in the molecular structure, it has good weather resistance. However, due to the high price of the above-mentioned outdoor weather-resistant epoxy resins, it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/00C09F1/04
Inventor 马一静哈成勇李因文沈敏敏
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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