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Rosin epoxide resin and preparation thereof

A technology of rosin epoxy resin and epichlorohydrin, applied in the field of chemical industry, can solve the problems of great influence, high acid value, high brittleness, etc., and achieve the effect of increasing added value and enriching structure

Inactive Publication Date: 2009-01-28
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

[0003] After the general-purpose epoxy resin uses a curing agent, because of its poor UV resistance, it cannot meet the requirements for the use of epoxy resin in recent years. In addition, there are still the following deficiencies in the source of its raw materials: mainly petroleum raw materials, which are supplied by petroleum The impact is very large, so it cannot meet the needs of modern industry
However, rosin itself has the disadvantages of easy crystallization, poor oxidation resistance and high acid value, and its brittleness due to its three-membered phenanthrene ring skeleton limits its direct application.

Method used

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  • Rosin epoxide resin and preparation thereof
  • Rosin epoxide resin and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) prepare formaldehyde-modified rosin according to known prior art;

[0022] (2) Add 100 g of formaldehyde-modified rosin and 600 g of epichlorohydrin into a four-necked flask with a thermometer, a stirrer and a condenser, mix and stir, heat up to 85° C., add 0.6 g of sodium hydroxide, and the reaction time is 5 Hour;

[0023] (3) cooling, adding 90g of toluene and 30g of sodium hydroxide, the temperature was controlled at 70°C, and reacted for 4 hours;

[0024] (4) Filtrate, wash the filtrate with water until it is free of halogen ions, dry, and remove the solvent toluene under reduced pressure to obtain the product rosin epoxy resin, which is a light yellow transparent liquid at room temperature.

[0025] The product is subjected to infrared spectroscopy to measure absorption peaks: 2937, 1726 (ketone group), 1242 (ether group), 1151 (ether group), 1115, 910, 856, 758cm -1 .

Embodiment 2

[0027] (1) prepare formaldehyde-modified rosin according to known prior art;

[0028] (2) Add 100 g of formaldehyde-modified rosin and 400 g of epichlorohydrin into a four-necked flask with a thermometer, a stirrer and a condenser, mix and stir, heat up to 88° C., add 0.4 g of tetramethylammonium chloride, and react 5.5 hours;

[0029] (3) cooling, adding 100 g of benzene and 25 g of sodium hydroxide, controlling the temperature at 65° C., and reacting for 3.5 hours;

[0030] (4) Filtrate, wash the filtrate with water until it is free of halogen ions, dry, remove the solvent benzene under reduced pressure, and obtain the product rosin epoxy resin.

Embodiment 3

[0032] (1) prepare formaldehyde-modified rosin according to known prior art;

[0033] (2) Add 100g of formaldehyde-modified rosin and 650g of epichlorohydrin into a four-necked flask equipped with a thermometer, a stirrer and a condenser, mix and stir, heat up to 85°C, add 0.7g of tetramethylammonium chloride, and react 6 hours;

[0034] (3) cooling, add toluene 80g and sodium hydroxide 35g, temperature is controlled at 68 ℃, reacts for 3 hours;

[0035] (4) Filtrate, wash the filtrate with water until there is no halogen ion, dry, and desolventize toluene under reduced pressure to obtain the product rosin epoxy resin.

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Abstract

The invention relates to a rosin epoxy resin with a novel structure, and a preparation method thereof. The invention belongs to the chemical field. The rosin epoxy resin has the following structure. In the preparation method the rosin modified by formaldehyde and an epoxy chloropropane are added into a reaction system at first and the temperature is raised; then a catalyst is added and after the reaction is finished, cooling is carried out; a solvent is added for dissolving and the sodium hydroxide used for ring closing is added; after the reaction is carried out for a period of time, filtering is carried out and the filtrate is washed to be free of halide ions by water, then filtering is carried out and decompressing is carried out for removing the solvent to obtain the product of the rosin epoxy resin.

Description

technical field [0001] The invention relates to a rosin epoxy resin with a novel structure and a preparation method thereof, belonging to the field of chemistry and chemical engineering. Background technique [0002] Epoxy resins generally refer to organic polymer compounds containing two or more epoxy groups in their molecules, and their relative molecular weights are not high except for a few. Epoxy resin can cross-link with various types of curing agents to form an insoluble, infusible polymer with a three-dimensional network structure. At present, there are many kinds of epoxy resins, which are roughly divided into five categories according to their chemical structure and the combination of epoxy groups: glycidyl ethers, glycidyl esters, glycidyl amines, aliphatic epoxy compounds and alicyclic epoxy compound. The synthesis method of epoxy resin mainly includes: polycondensation of compounds containing active hydrogen atoms and compounds containing epoxy groups such as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/02C09F1/04
Inventor 哈成勇黄活阳
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI