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A kind of wood tar base epoxy resin, anticorrosion coating and preparation method thereof

A technology based on epoxy resin and anti-corrosion coatings, which is applied in the direction of epoxy resin coatings, anti-corrosion coatings, coatings, etc., can solve the problems of high toxicity of raw materials and poor performance, and facilitate mass production, reduce production costs, and improve performance Effect

Active Publication Date: 2021-08-24
河南省高新技术实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiencies in the prior art, one of the purposes of the present invention is to provide a wood tar-based epoxy resin, which can effectively solve the problems of high toxicity of raw materials and poor performance in the synthesis process of epoxy resin

Method used

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  • A kind of wood tar base epoxy resin, anticorrosion coating and preparation method thereof
  • A kind of wood tar base epoxy resin, anticorrosion coating and preparation method thereof

Examples

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Effect test

Embodiment 1

[0034] A wood tar-based epoxy resin is made from raw materials in the following mass ratio: refined wood tar, bisphenol A and epichlorohydrin in a mass ratio of 0.25:0.75:4.

[0035] The preparation method of above-mentioned wood tar base epoxy resin, comprises the following steps:

[0036] (1) Preparation of refined wood tar: the wood tar obtained by thermal cracking of agricultural and forestry wastes is distilled under reduced pressure at a pressure of 0.085 MPa and a temperature of 120° C. to obtain refined wood tar;

[0037] (2) Preparation of wood tar-based epoxy resin: put refined wood tar, bisphenol A, and epichlorohydrin in a reactor in proportion, stir evenly under the protection of an inert gas, preheat to 75°C, and wait for refined wood tar and After the bisphenol A is completely dissolved, cool down to 65°C, add 10mol / kg sodium hydroxide aqueous solution dropwise at a rate of 0.2ml / min, the molar dosage of sodium hydroxide is 20% of epichlorohydrin, raise the temp...

Embodiment 2

[0045] A wood tar-based epoxy resin is made from raw materials in the following mass ratio: refined wood tar, bisphenol A and epichlorohydrin in a mass ratio of 0.5:0.5:4.

[0046] The preparation method of above-mentioned wood tar base epoxy resin, comprises the following steps:

[0047] (1) Preparation of refined wood tar: the wood tar obtained by thermal cracking of agricultural and forestry wastes is distilled under reduced pressure at a pressure of 0.09 MPa and a temperature of 140° C. to obtain refined wood tar;

[0048] (2) Preparation of wood tar-based epoxy resin: put refined wood tar, bisphenol A and epichlorohydrin in proportion to the reactor, stir evenly under the protection of an inert gas, preheat to 78 ° C, and wait for the refined wood tar and After bisphenol A is completely dissolved, cool down to 67°C, add 10mol / kg sodium hydroxide aqueous solution dropwise at a rate of 0.25ml / min, the molar dosage of sodium hydroxide is 22% of epichlorohydrin, raise the tem...

Embodiment 3

[0053] A wood tar-based epoxy resin is made from raw materials in the following mass ratio: the mass ratio of refined wood tar to epichlorohydrin is 1:4.

[0054] The preparation method of above-mentioned wood tar base epoxy resin, comprises the following steps:

[0055] (1) Preparation of refined wood tar: the wood tar obtained by thermal cracking of agricultural and forestry wastes is distilled under reduced pressure at a pressure of 0.1 MPa and a temperature of 150° C. to obtain refined wood tar;

[0056] (2) Preparation of wood tar-based epoxy resin: put refined wood tar, bisphenol A and epichlorohydrin in a reactor in proportion, stir evenly under the protection of an inert gas, preheat to 80°C, and wait for the refined wood tar and After bisphenol A is completely dissolved, cool down to 70°C, add 10mol / kg sodium hydroxide aqueous solution dropwise at a rate of 0.3ml / min, the molar dosage of sodium hydroxide is 25% of epichlorohydrin, raise the temperature to 80°C, and co...

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Abstract

The invention discloses a wood tar-based epoxy resin, which comprises raw materials in the following mass ratio: refined wood tar, bisphenol A and epichlorohydrin in a mass ratio of 0.25-1:0-0.75:4, wherein refined wood tar, bisphenol A The sum of the mass ratios of phenol A is 1. It is prepared by adding refined wood tar, partially or completely replacing bisphenol A and epichlorohydrin for polycondensation reaction, reducing the amount of bisphenol A or not adding bisphenol A at all, improving the performance of epoxy resin and reducing environmental pollution , reduce production costs and improve economic benefits. The present invention also provides a kind of anticorrosion paint, comprises two parts of component A and component B, and component A comprises the wood tar-based epoxy resin of claim 1, and component B comprises the refined wood tar in claim 1 . Improve the performance of anti-corrosion coatings by adding wood tar-based epoxy resins and refined wood tar. The invention also provides a preparation method of the above-mentioned wood tar-based epoxy resin and anti-corrosion coating, which is easy to operate, easy to control, and convenient to realize mass production.

Description

technical field [0001] The invention relates to the field of synthetic resins and coatings, in particular to a wood tar-based epoxy resin, an anti-corrosion coating and a preparation method thereof. Background technique [0002] At present, there are aliphatic hydroxyl groups and ether bonds with high polarity and not easy to hydrolyze in the molecular structure of epoxy resins, and benzene rings with excellent resistance to chemical media. The coating film has good adhesion, high chemical resistance, physical and mechanical properties and water resistance. It has been widely used in anti-corrosion coatings due to its good properties. More than 90% of currently used epoxy resin prepolymers are polycondensed from bisphenol A and excess epichlorohydrin. Synthetic raw material bisphenol A is expensive, resulting in high cost of epoxy resin; at the same time, bisphenol A is a protoplasmic poison, which can cause endocrine disorders in the human body, and has carcinogenic effect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G59/06C09D163/00C09D5/08C09D7/61C08G59/68
CPCC08G59/063C08G59/68C08K2003/2241C08K2003/2272C08K2003/3045C09D5/08C09D163/00C09D7/61C08K3/22C08K3/34C08K3/30
Inventor 刘振马磊王品胜肖进彬谢梅竹王鹏晓赵绘婷聂宁张波张璐璐杨昌澎高正龙刘红云陈红
Owner 河南省高新技术实业有限公司