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Cardanol epoxy resin

A cardanol epoxy resin and epichlorohydrin technology, which is applied in the field of epoxy resin materials, can solve the problems of high product brittleness, increased production cost, poor toughness and weather resistance, etc.

Inactive Publication Date: 2011-11-16
徐州中研科技工业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a cardanol epoxy resin to solve the problems that the production cost is constantly increasing due to the rising oil price, and the product is relatively brittle and has poor toughness and weather resistance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 1. Add 114 grams of bisphenol A, 150 grams of cardanol, and 370 grams of epichlorohydrin into a four-necked reaction flask equipped with a water separation device, and fill it with nitrogen for protection.

[0016] 2. Raise the temperature to 60-64°C, add 2.5 grams of solid sodium hydroxide, and keep it warm for 3-4 hours.

[0017] 3. Under a vacuum of 15-30Kpa, slowly and uniformly add 104 grams of sodium hydroxide solution with a concentration of 50% for about 3-4 hours. The water and epichlorohydrin produced by the reaction are azeotropic, cooled by the condenser tube, enter the phase separator, and the water is separated, and the epichlorohydrin returns to the reaction bottle to continue the reaction.

[0018] 4. After the reaction is over, control the vacuum to 0.8-0.9Kpa, raise the temperature to 135-150°C, and remove the epichlorohydrin in the material

[0019] 5. Add about 200 grams of toluene, 120 grams of soft water, 17 grams of sodium hydroxide solution with...

Embodiment 2

[0023] 1. Add 228 grams of bisphenol A, 150 grams of cardanol, and 555 grams of epichlorohydrin into a four-necked reaction flask equipped with a water separation device, and fill it with nitrogen for protection.

[0024] 2. Raise the temperature to 60-64°C, add 4 grams of solid sodium hydroxide, and keep it warm for 3-4 hours.

[0025] 3. Under a vacuum of 15-30Kpa, slowly and uniformly add 182 grams of sodium hydroxide solution with a concentration of 40% for about 3-4 hours. The water and epichlorohydrin produced by the reaction are azeotropic, cooled by the condenser tube, enter the phase separator, and the water is separated, and the epichlorohydrin returns to the reaction bottle to continue the reaction.

[0026] 4. After the reaction is over, control the vacuum to 0.8-0.9Kpa, raise the temperature to 135-150°C, and remove the epichlorohydrin in the material.

[0027] 5. Add about 350 grams of toluene, 180 grams of soft water, add 20 grams of sodium hydroxide solution w...

Embodiment 3

[0031] 1. Add 228 grams of bisphenol A, 150 grams of cardanol, and 925 grams of epichlorohydrin into a four-necked reaction flask equipped with a water separation device, and fill it with nitrogen for protection.

[0032] 2. Raise the temperature to 60-64°C, add 6 grams of solid sodium hydroxide, and keep it warm for 3-4 hours.

[0033] 3. Under a vacuum of 15-30Kpa, slowly and uniformly add 180 grams of sodium hydroxide solution with a concentration of 30% for about 3-4 hours. The water and epichlorohydrin produced by the reaction are azeotropic, cooled by the condenser tube, enter the phase separator, and the water is separated, and the epichlorohydrin returns to the reaction bottle to continue the reaction.

[0034] 4. After the reaction is over, control the vacuum to 0.8-0.9Kpa, raise the temperature to 135-150°C, and remove the epichlorohydrin in the material.

[0035] 5. Add about 350 grams of toluene, 180 grams of demineralized water, add 24 grams of 30% sodium hydroxi...

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Abstract

The invention relates to a cardanol epoxy resin, belonging to epoxy resin materials. The process comprises the following steps of: 1, adding bisphenol A, cardanol and epichlorohydrin in proportion into a reaction kettle; 2, heating and adding solid sodium hydroxide; 3, dropwise adding a sodium hydroxide solution, discharging water generated by reaction and the epichlorohydrin out of the reaction kettle by azeotropy, and returning the epichlorohydrin into the reaction kettle after condensing and decomposing for continuing the reaction; 4, after the reaction, distilling off water and most of the epichlorohydrin from the material in the reaction kettle, and removing the residual epichlorohydrin by a film evaporator to obtain crude resin; 5, adding an organic solvent and soft water into a refining kettle, dropwise adding the residual sodium hydroxide solution, wherein the organic solvent is toluene or methyl isobutyl ketone; and 6, removing the organic solvent from the refined resin solution by a film evaporator to obtain the product. The used cardanol is environment-friendly, energy-saving and pollution-free, and the cardanol epoxy resin obviously improves the brittleness, toughness and weatherability of the cured resin.

Description

technical field [0001] The invention relates to an epoxy resin material, in particular to a cardanol epoxy resin. Background technique [0002] Because the cured epoxy resin has excellent chemical resistance properties: low shrinkage, high bonding strength, high mechanical strength, and excellent electrical insulation, it is widely used in various fields of the national economy. However, the raw materials for the production of epoxy resins all come from petrochemicals, and the dependence on petroleum is very high. Moreover, petroleum is a one-time resource. The price of petroleum continues to rise, resulting in continuous increase in production costs. At the same time, its products are more brittle and poor in toughness and weather resistance. Contents of the invention [0003] The purpose of the present invention is to provide a kind of cardanol epoxy resin, solves because the oil price keeps climbing, causes the production cost to increase constantly, simultaneously the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/06
Inventor 周伟
Owner 徐州中研科技工业有限公司
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