A kind of epoxy resin based on gallic acid and its preparation method and application

A technology of gallic acid and epoxy resin, applied in the direction of epoxy resin glue, epoxy resin coating, adhesive type, etc., to achieve broad application prospects, good mechanical and thermal properties, and good mechanical properties.

Active Publication Date: 2011-12-14
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Based on this, the current development trend urgently needs a new type of thermosetting epoxy resin to replace the traditionally used bisphenol A epoxy resin, so as to achieve a harmonious development between the economy and the environment. In the prior art, there is no use of gallic acid Preparation of Gallic Acid-Based Epoxy Resins as Starting Materials Literature and Patent Reports

Method used

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  • A kind of epoxy resin based on gallic acid and its preparation method and application
  • A kind of epoxy resin based on gallic acid and its preparation method and application
  • A kind of epoxy resin based on gallic acid and its preparation method and application

Examples

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Effect test

Embodiment 1

[0036] Mix 100 grams of gallic acid and 500 grams of epichlorohydrin, raise the temperature to 100°C, add 10 grams of tetramethylammonium chloride, react at 100°C for 5 hours, then cool down to 30°C, then add 25 grams of sodium hydroxide and 60 g of distilled water to form a reaction system, and continue to react at 30°C for 2h. After the reaction system was lowered to room temperature, it was washed with 200 mL of deionized water each time for a total of 4 times, and then the solvent was removed by a rotary evaporator, and vacuum-dried at 50° C. for 12 hours to obtain 60 grams of gallic acid-based epoxy resin.

[0037] The above-mentioned epoxy resin based on gallic acid is carried out structural identification, and the infrared spectrogram is as follows figure 1 shown. The identification result is: there is 2960cm in the infrared spectrum -1 、1720cm -1 、1580cm -1 、1205cm -1 、1080cm -1 、853cm -1 and other characteristic absorption peaks; hydrogen nuclear magnetic reson...

Embodiment 2

[0041] Mix 100 grams of gallic acid and 700 grams of epibromohydrin, raise the temperature to 110°C, add 20 grams of octadecyltrimethylammonium bromide, react at 110°C for 2 hours, then cool down to 30°C, then add 30 grams of hydrogen Potassium oxide and 60 grams of distilled water form a reaction system, and the reaction is continued at 30° C. for 3 hours. After the reaction system was lowered to room temperature, it was washed with 200 mL of deionized water each time for a total of 4 times, and then the solvent was removed by a rotary evaporator, and vacuum-dried at 50° C. for 12 hours to obtain 80 grams of epoxy resin based on gallic acid.

[0042] The structure of the epoxy resin based on gallic acid obtained above was identified, and the identification result was basically the same as that in Example 1. The measured epoxy value is 0.6 epoxy equivalent / 100 grams of resin. 100 parts by weight of epoxy resin based on gallic acid and 46 parts by weight of hexahydrophthalic a...

Embodiment 3

[0044] 100 grams of gallic acid, 300 grams of epibromohydrin and 300 grams of epichlorohydrin were mixed, the temperature was raised to 120°C, 6 grams of octadecyltrimethylammonium bromide and 12 grams of hexamethylenetetraammonium were added, After reacting at 120°C for 4 hours, the temperature was lowered to 30°C, and then 10 grams of potassium hydroxide, 8 grams of magnesium hydroxide and 60 grams of distilled water were added to form a reaction system, and the reaction was continued at 30°C for 4 hours. After the reaction system was lowered to room temperature, it was washed with 200 mL of deionized water each time for a total of 4 times, and then the solvent was removed by a rotary evaporator, and vacuum-dried at 50° C. for 12 hours to obtain 68 grams of gallic acid-based epoxy resin.

[0045] The gallic acid-based epoxy resin obtained above was identified, and the identification result was basically the same as that in Example 1. The measured epoxy value is 0.53 epoxy eq...

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Abstract

The invention discloses an epoxy resin based on gallic acids with a structure shown as the formula I, which has high epoxy values and also has higher crosslinking density after being cured, thus having good mechanical property and thermal property. The invention also discloses a preparation method of the epoxy resin based on the gallic acids, comprising the following steps: mixing the gallic acids, epoxy halogenopropane and a catalyst and reacting for 2-5 hours at the temperature of 100-120 DEG C; cooling to 20-40 DEG C; adding alkaline compounds and water and continuing to react for 2-5 hours; and washing, removing a solvent and drying to obtain the epoxy resin based on the gallic acids. The preparation method is simple in process, good in controllability and easy to implement industrially. The invention also provides an application of the epoxy resin based on the gallic acids. The epoxy resin based on the gallic acids is particularly applied to preparing composite materials, epoxy adhesives and coatings.

Description

technical field [0001] The invention relates to epoxy resin, the field of preparation and application of epoxy resin, in particular to a gallic acid-based epoxy resin and its preparation method and application. Background technique [0002] Bio-based polymer materials use renewable resources as the main raw material. While reducing the consumption of petroleum resources in the plastics industry, it also reduces the environmental pollution of petroleum-based chemical raw materials in the production process. It has the dual functions of saving petroleum resources and protecting the environment. effect. As early as a few years ago, the United States, Japan, and the European Union successively passed strategic bills and standards such as the Biomass Research and Development Act, the Biotechnology Strategy Outline, and the European environmental standard EN13432 to promote the healthy development of the economy and the environment. In my country, Premier Wen Jiabao made a solemn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/06C08L63/00C08G59/42C09D163/00C09J163/00
Inventor 刘小青江艳华朱锦周拓
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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