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Full-biobased epoxy resin composition and condensate

A technology based on epoxy resin and rosin-based epoxy resin, applied in the field of bio-based thermosetting resin, can solve the problems of high brittleness and poor comprehensive performance, and achieve good mechanical properties, excellent UV resistance and strong operability Effect

Active Publication Date: 2011-10-05
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The present invention also provides a cured product of all bio-based epoxy resin, which uses bio-based tung oil anhydride to cure rosin-based epoxy resin, and prepares a cured product of fully bio-based epoxy resin, which overcomes the problem of common rosin-based epoxy resin in terms of molecular structure. Due to the shortcomings of high brittleness and poor comprehensive performance of epoxy resin cured products, the prepared all-bio-based epoxy resin cured products have good mechanical properties, good UV resistance and excellent aging resistance.

Method used

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  • Full-biobased epoxy resin composition and condensate
  • Full-biobased epoxy resin composition and condensate
  • Full-biobased epoxy resin composition and condensate

Examples

Experimental program
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Effect test

Embodiment 1

[0042] (1) Mix 400 grams of maleopimaric anhydride, 300 grams of epichlorohydrin, and 18 grams of water, add 8 grams of tetramethylammonium bromide, react at 80 ° C for 1 hour, and recover the remaining rings from the reaction by distillation under reduced pressure. Oxychloropropane, then add 50 milliliters of toluene, and add a total of 170 grams of potassium hydroxide in 4 equal amounts at 100 ° C, maintain the reaction for 2 hours, filter and wash until neutral, and recycle the solvent by distillation under reduced pressure to obtain the formula Light yellow transparent rosin-based epoxy resin monomer with I structure;

[0043]

[0044] Rosin-based epoxy resin monomer of formula I structure

[0045] (2) 100 grams of rosin-based epoxy resin monomers and 50 grams of tung oil anhydride (purchased from Henan Linmei Technology Co., Ltd., wherein the weight percentage of the anhydride is 14%; the viscosity at 25° C. 4000mPa s) and catalyzer 1-methyl-2-ethylimidazole 3 grams a...

Embodiment 2

[0049] (1) Dissolve 100 grams of maleopimaric anhydride in 150 milliliters of N,N-dimethylformamide, add 46 grams of p-aminobenzoic acid, stir at room temperature for 3 hours, then heat up to 150°C and stir for 4 hours, then cool to At room temperature, it becomes a yellow-brown solid. Add 150 grams of distilled water and stir, and a yellow precipitate occurs. Filtrate, wash, vacuum dry at 60°C for 3 hours, recrystallize repeatedly with DMF and water, the final product becomes a white powdery solid, put it in a vacuum drying oven at 90°C for 10 hours, and obtain maleopimaric acid imide binary Acid, yield 86%. Under the protection of nitrogen, the obtained maleopimaric acid imide dibasic acid and 40 grams of epoxybromopropane were added into a three-necked flask with mechanical stirring, heated and dissolved into a homogeneous phase, and cetyl trimethyl bromide was added React 3 grams of ammonium at 90°C for 5 hours, cool to 65°C, add 5 grams of sodium hydroxide each time, a t...

Embodiment 3

[0056] (1) Add 100 grams of formaldehyde-modified rosin and 480 grams of epichlorohydrin into a four-necked flask with a thermometer, a stirrer and a condenser tube and mix evenly. After the temperature is raised to 85° C., 0.45 grams of tetramethylammonium chloride are added. React for 5 hours, add 75 grams of benzene and 29 grams of sodium hydroxide after cooling, control the temperature at 70 ° C, and then react for 3.5 hours. Filtrate, wash with water until there is no halogen ion, remove the solvent under reduced pressure, and dry in vacuum at 60° C. for 6 hours to obtain a rosin-based epoxy resin monomer with the structure of formula V;

[0057]

[0058] Rosin-based epoxy resin monomer of formula V structure

[0059] (2) 100 grams of rosin-based epoxy resin monomer of the above-mentioned formula V structure, 300 grams of tung oil anhydride (purchased from Henan Linmei Technology Co., Ltd., wherein, the weight percentage of anhydride is 13.1%; the viscosity at 25 ° C ...

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Abstract

The invention discloses a full-biobased epoxy resin condensate. The condensate is prepared by the following components in part by weight: 100 parts of abietyl-based epoxy resin base material, 50 to 300 parts of tung oil anhydride and 1 to 15 parts of catalyst, has the characteristics of higher mechanical property, high ultraviolet resistance, high aging resistance and the like and is particularlysuitable for preparing biobased composite material matrix resin and outdoor electric insulation materials. The invention also discloses a preparation method for the full-biobased epoxy resin condensate. The preparation method has a simple preparation process, is high in operability and process controllability and is easy to implement industrially. The invention also discloses a full-biobased epoxy resin composition and application thereof. The full-biobased epoxy resin composition is suitable for preparing a weather resistant epoxy adhesive, epoxy resin paint and an epoxy resin coating and has a good application prospect.

Description

technical field [0001] The invention belongs to the field of bio-based thermosetting resins, in particular to an all-bio-based epoxy resin composition and its cured product. Background technique [0002] Epoxy resin is widely used in various fields of the national economy such as aerospace, construction transportation, and electronic appliances because of its excellent mechanical properties, thermal properties, and corrosion resistance. However, commonly used epoxy resins generally use petroleum-based compounds such as bisphenol A or bisphenol F as raw materials. Because of their structural units such as aromatic benzene rings, the commonly used epoxy resins have poor aging resistance and UV resistance. There are technical problems. [0003] At present, weather-resistant epoxy resins for outdoor use are mainly prepared from petroleum-based aliphatic cyclic compounds and epichlorohydrin. Although this type of epoxy resin has good weather resistance due to the absence of ben...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/20C08G59/42C08G59/32C08G59/24C08G59/26C09J163/00C09D163/00H01B3/40
Inventor 刘小青朱锦江艳华
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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