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Wood tar-modified epoxy resin curing agent, production method thereof and epoxy resin anticorrosive coating

A technology of epoxy resin curing and production method, which is applied in epoxy resin coatings, coatings and other directions to achieve the effects of reducing environmental pollution, improving various properties, and using large quantities

Inactive Publication Date: 2014-12-17
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] So far, there has not been any report on the use of crude wood tar, a by-product of the biomass energy industry, as a raw material for the preparation of epoxy resin curing agents.

Method used

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  • Wood tar-modified epoxy resin curing agent, production method thereof and epoxy resin anticorrosive coating
  • Wood tar-modified epoxy resin curing agent, production method thereof and epoxy resin anticorrosive coating

Examples

Experimental program
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Effect test

preparation Embodiment 1

[0028] (1) Treatment of crude wood tar: distill the crude wood tar under reduced pressure at 0.085MPa at 140°C, stop the decompression after 3 hours, and obtain refined wood tar, which is identified by gas chromatography and mass spectrometry (GC-MS method) The content of phenolic substances in the refined wood tar reaches 30%.

[0029] (2) Preparation: Heat 37.5 grams of fine wood tar, 21 grams of 37% formaldehyde solution by mass percentage, and 6 grams of xylene to 90 ° C, keep warm for 1.5 hours, and then mix 14 grams of xylene and 54.5 g of triethylenetetramine Add dropwise, and finally keep the reaction at 80°C for 2h.

[0030] (3) Suction filtration: The above reaction product was subjected to vacuum suction filtration at 085 MPa and 90° C. until no liquid flowed out to obtain epoxy resin curing agent 1 .

[0031] The raw material components of epoxy curing agent 1 are: 37.5 grams of fine wood tar, 21 grams of formaldehyde solution, 54.5 grams of triethylenetetramine a...

preparation Embodiment 2

[0034] (1) Treatment of crude wood tar: distill the crude wood tar under reduced pressure at 0.01MPa at 123°C, and stop the decompression after 3 hours to obtain refined wood tar, which is identified by gas chromatography and mass spectrometry (GC-MS method) The content of phenolic substances in the refined wood tar reaches 32%.

[0035] (2) Preparation: Heat 50 grams of wood tar, 35 grams of 37% formaldehyde solution, and 28 grams of xylene to 60° C., keep the temperature for 1.5 hours, then add a mixture of 12 grams of xylene and 37 g of triethylenetetramine dropwise, Finally, at 50° C., keep warm for 3 h.

[0036] (3) Suction filtration: the above reaction product was subjected to vacuum filtration at 0.1 MPa and 85° C. until no liquid flowed out to obtain epoxy resin curing agent 2 .

[0037] The raw material components of the epoxy curing agent 2 are: 50 grams of fine wood tar, 35 grams of formaldehyde solution, 37 grams of triethylenetetramine and 40 grams of xylene, wh...

preparation Embodiment 3

[0040] (1) Treatment of crude wood tar: distill the crude wood tar under reduced pressure at 0.01MPa at 123°C, and stop the decompression after 3 hours to obtain refined wood tar, which is identified by gas chromatography and mass spectrometry (GC-MS method) The content of phenolic substances in the refined wood tar reaches 35%.

[0041] (2) Preparation: Heat 37.5 grams of wood tar, 26 grams of 37% formaldehyde solution, and 12 grams of xylene to 90° C., keep warm for 1.5 hours, then mix 28 grams of xylene and 51.7 grams of diethylenetriamine and add them dropwise , at 50 ° C, heat preservation reaction 3h.

[0042] (3) Suction filtration: The above reaction product was subjected to vacuum filtration at 0.1 MPa and 85° C. until no liquid flowed out to obtain epoxy resin curing agent 3 .

[0043]The raw material components of epoxy curing agent 3 are: 37.5 grams of refined wood tar, 26 grams of formaldehyde solution, 51.7 grams of diethylenetriamine and 40 grams of xylene, whe...

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Abstract

The invention discloses a wood tar-modified epoxy resin curing agent, a production method thereof and a coating; the wood tar-modified epoxy resin curing agent comprises the following components by weight: 37.5-50 parts of fine wood tar, 21-35 parts of 37% formaldehyde solution, 37-54.5 parts of polyethylene polyamine and 20-40 parts of dimethylbenzene. The production method of the epoxy resin curing agent provided by the invention comprises the steps of carrying out reduced pressure distillation to coarse wood tar, then mixing with the other components, reacting while keeping temperature, and then leaching. The epoxy resin anticorrosive coating provided by the invention contains the wood tar-modified epoxy resin curing agent, epoxy resin and solvent. The curing agent provided by the invention fully utilizes by-products of wood tar in the biomass energy industry as raw materials, and has the advantages of low production cost and simple preparation technology; various performances of the epoxy resin anticorrosive coating prepared by the curing agent are excellent, so that the epoxy resin anticorrosive coating is particularly suitable for severe environment with high anticorrosive demands.

Description

technical field [0001] The invention relates to the synthetic resin and coating industry in the field of chemical industry, in particular to a wood tar modified epoxy resin curing agent, a production method thereof and an epoxy resin anticorrosion coating. Background technique [0002] The content of phenolic substances in wood tar is high. For example, in Li Lin and Zhang Pengyuan's "Study on Partial Substitution of Wood Tar for Phenol to Synthesize Phenolic Resin Adhesive", according to the characteristics of high content of phenolic substances in wood tar, the role of the composite catalyst of triethylamine and barium hydroxide Under the following circumstances, a phenolic resin adhesive was synthesized by partially replacing phenol with wood tar. The content of free formaldehyde in the adhesive exceeded the standard, and other quality indicators met the requirements of the national standard. Moreover, this article specifically analyzed the composition of the substances i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G59/62C09D163/02
Inventor 张良均张欢
Owner WUHAN INSTITUTE OF TECHNOLOGY
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