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A kind of dimer acid modified epoxy resin and preparation method thereof

A technology of epoxy resin and dimer acid, which is applied in organic chemistry, coating, etc., can solve the problems of poor toughness, low reactivity, and difficult film formation of epoxy resin, so as to reduce the rigid structure of resin and solve the problem of excessive viscosity , the effect of reducing viscosity

Active Publication Date: 2019-01-25
XIAMEN SUNRUI SHIP COATING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The main purpose of the present invention is to overcome the shortcoming of the prior art, provide a kind of dimer acid modified epoxy resin and preparation method thereof, by carrying out polyaddition reaction with dimer acid and aliphatic glycidyl ether, obtain low viscosity, Epoxy resin with good toughness effectively solves the problems of poor toughness, high viscosity, low reactivity and difficult film formation of epoxy resin

Method used

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  • A kind of dimer acid modified epoxy resin and preparation method thereof
  • A kind of dimer acid modified epoxy resin and preparation method thereof
  • A kind of dimer acid modified epoxy resin and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Add 34.36g of 1,4-butanediol diglycidyl ether and 25.10g of dimer acid to a 250ml four-neck flask, blow nitrogen into it and stir for 0.5h, raise the temperature to 100°C, weigh the dimer acid and aliphatic dimer acid The tetrabutylammonium bromide catalyst with a total weight of 0.15wt% of glycerol ether was dissolved in 1.5mL of acetone, and after dissolving, it was added to a four-necked flask, and the temperature was continued to rise to 120°C, and the reaction was kept for 6.0h. The acid value was tested to be 1.5mgKOH / g, the epoxy value is 0.42; stop the insulation reaction, cool to room temperature, and discharge.

Embodiment 2

[0038] Add 38.23g of 1,6-hexanediol diglycidyl ether and 25.10g of dimer acid into a 250ml four-neck flask, blow nitrogen into it and stir for 0.5h, raise the temperature to 100°C, weigh the dimer acid and aliphatic dimer acid The dodecyltrimethylammonium chloride catalyst with a total weight of 0.15wt% of glycerol ether was dissolved in 1.5mL of acetone, and added to a four-neck flask after dissolving, and continued to heat up to 120°C, and kept the temperature for 6.0h. After testing the acid value It is 1.6mgKOH / g, and the epoxy value is 0.40; stop the insulation reaction, cool to room temperature, and discharge.

Embodiment 3

[0040] Add 30.58g of 1,4-butanediol diglycidyl ether and 25.10g of dimer acid to a 250ml four-neck flask, blow in nitrogen and stir for 0.5h, heat up to 100°C, weigh dimer acid and aliphatic dimer acid A tetrabutylammonium bromide catalyst with a total weight of 0.20wt% of glycerol ether was dissolved in 2.0mL of acetone, and after dissolving, it was added to a four-neck flask, and the temperature was continued to rise to 120°C, and the temperature was kept for 6.5h. g, the epoxy value is 0.35; stop the insulation reaction, cool to room temperature, and discharge.

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Abstract

The invention relates to the technical field of chemical materials, in particular to dimer acid modified epoxy resin and a preparation method thereof. The preparation method includes: weighing aliphatic diglycidyl ether and dimer acid, adding into a flask, feeding dry nitrogen, stirring at 25 DEG C, and performing air displacement for 0.5h; continuing stirring, heating to 100 DEG C, adding catalysts, adjusting the temperature of the four-neck flask to 110-125 DEG C, performing thermal reaction and keeping the temperature for 5-8h. By the dimer acid modified epoxy resin prepared according to the method, problems of poor epoxy resin toughness, high viscosity, low reaction activity, difficulty in film formation and the like are solved effectively.

Description

technical field [0001] The invention relates to the technical field of chemical materials, in particular to a dimer acid-modified epoxy resin and a preparation method thereof. Background technique [0002] Epoxy resins are widely used in various fields due to their excellent performance, but commercially available epoxy resins are mainly based on bisphenol A resin structure, which has more rigid groups, resulting in brittle cured products. Therefore, the toughening modification of epoxy resin has always been a research hotspot. Dimer acid modified epoxy resin can introduce flexible segments into the epoxy resin segment, reduce the density of methyl groups and benzene rings in the molecular structure of the resin, reduce the influence of the steric hindrance of the two, and increase the segmental movement capacity of the resin , to improve the brittleness of its cured product. This method can effectively improve the toughness of epoxy resin, but because the molecular weight...

Claims

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Application Information

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IPC IPC(8): C07D303/24C07D301/00C09D4/00
CPCC07D301/00C07D303/24C09D4/00
Inventor 康瑞瑞梅奕徐静张贤慧
Owner XIAMEN SUNRUI SHIP COATING
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