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Ultraviolet-heat dual curing polyaniline anti-corrosive paint and preparation method thereof

A technology of anti-corrosion coatings and polyaniline, applied in anti-corrosion coatings, polyurea/polyurethane coatings, coatings, etc., can solve problems affecting coating hardness, adhesion, non-curing, and coating anti-corrosion performance reduction

Active Publication Date: 2009-04-29
中科应化(长春)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, due to the great disadvantage of UV-curable coatings, that is, the curing is limited by the penetration depth of UV light, especially in the presence of a large number of fillers that absorb or block UV light, the coating is not cured completely or not cured at all.
Polyaniline itself has a certain absorption of ultraviolet light. When polyaniline is added to UV-curable coatings and a certain amount of inorganic fillers are added, it will inevitably affect the curing degree of UV-curable coatings, especially when spraying anti-corrosion coatings. , if the coating is thicker, it is difficult to cure completely inside the coating, which will affect the hardness, adhesion and other properties of the coating, and the anti-corrosion performance of the coating will also be greatly reduced

Method used

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  • Ultraviolet-heat dual curing polyaniline anti-corrosive paint and preparation method thereof
  • Ultraviolet-heat dual curing polyaniline anti-corrosive paint and preparation method thereof
  • Ultraviolet-heat dual curing polyaniline anti-corrosive paint and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Weigh 44g of epoxy acrylate, 40g of cyclohexyl acrylate, and 20g of polyurethane polyol into a sand mill tank, add 2g of polyaniline powder under stirring, stir for 0.5 hours, and then add dispersant BYK163:3 under stirring grams, 15 grams of talcum powder, 30 grams of calcium carbonate, 15 grams of precipitated barium sulfate, leveling agent BYK371: 3 grams, 8 grams of 2-hydroxy-2-methyl-1-phenylacetone, at a speed of 2500 rpm Stir for 1.5 hours, sand mill for 2 hours, and filter with a 200-mesh filter cloth to obtain a filtrate.

[0063] Take out 36g of filtrate and 4g of polyurethane curing agent, mix them evenly and spray them on the polished, degreasing and derusting metal steel plate, leveling at 60°C for 2 minutes, irradiating with 3kw ultraviolet light, curing time 20 seconds, and then It was baked at 60°C for 10 minutes, and the properties of the paint film were measured after thermal curing.

[0064] The results obtained are shown in Table 1

Embodiment 2

[0066] Weigh 80g of epoxy acrylate, 40g of hydroxyethyl acrylate, and 20g of polyurethane polyol into a sand mill tank, add 6g of polyaniline powder under stirring, stir for 1 hour, then add dispersant BYK163:2 under stirring grams, 5 grams of talc, 10 grams of calcium carbonate, 5 grams of precipitated barium sulfate, leveling agent BYK371: 2 grams, 10 grams of 2-hydroxy-2-methyl-1-phenylacetone, at a speed of 2500 rpm Stir for 1. hour, sand mill for 3 hours, and filter with a 200-mesh filter cloth to obtain a filtrate.

[0067] Take out 36g of filtrate and 4g of polyurethane curing agent, mix them evenly and spray them on the polished, degreasing and derusting metal steel plate, leveling at 60°C for 2 minutes, irradiating with 3kw ultraviolet light, curing time 20 seconds, and then It was baked at 60°C for 10 minutes, and the properties of the paint film were measured after thermal curing.

[0068] The results obtained are shown in Table 1

Embodiment 3

[0070] Weigh 40g of epoxy acrylate, 40g of isobornyl acrylate, and 40g of polyurethane polyol into a sand mill tank, add 10g of polyaniline powder under stirring, stir for 1.5 hours, and then add dispersant BYK163:2 under stirring gram, 5 grams of talcum powder, 10 grams of calcium carbonate, 5 grams of precipitated barium sulfate, leveling agent BYK371: 2 grams, 6 grams of 1-hydroxycyclohexyl benzophenone, stirring for 1 hour at a speed of 2500 rpm, sanding After 4 hours, filter with a 200-mesh filter cloth to obtain a filtrate.

[0071] Take out 32g of filtrate and 8g of polyurethane curing agent, mix them evenly and spray them on the polished, degreased and derusted metal steel plate, leveling at 60°C for 2 minutes, irradiating with 3kw ultraviolet light, curing time for 20 seconds, and then It was baked at 60°C for 10 minutes, and the properties of the paint film were measured after thermal curing.

[0072] The results obtained are shown in Table 1

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Abstract

The invention provides an ultraviolet-thermal double curing polyaniline anti-corrosive coating and a preparation method thereof. In the coating, polyaniline is adopted as a main anti-corrosive material, and oligomer, a reactive diluent, polyurethane polylol, polyaniline, filler, light trigger and an auxiliary agent are used for preparing filtrate of the coating; and the filtrate and a polyurethane curing agent are stored respectively and uniformly mixed in proportion for use. The anti-corrosive paint has good anti-corrosive effect on different metals, not only can perform ultraviolet curing crosslinking but also can perform thermal curing crosslinking, well overcomes the defect of incomplete curing of an ultraviolet curing anti-corrosive paint, has the characteristics of resisting acid medium corrosion and alkali medium corrosion, is suitable to be used under the condition of a severe environment and particularly suitable for corrosion protection under the condition of a marine environment, does not contain heavy metals such as plumbum, chromium and zinc, and simultaneously does not contain any organic solvent in a formula. Therefore, the coating does not have the problem of environmental pollution during the production process and the use process, and is a completely environment-friendly coating.

Description

technical field [0001] The invention relates to an ultraviolet-heat dual curing polyaniline anticorrosion coating and a preparation method thereof. Background technique [0002] With the increasing emphasis on environmental issues worldwide, the traditional coatings industry is facing enormous challenges. The clean production technology of environmentally friendly coatings is a direction that countries all over the world are striving to develop. Ultraviolet (UV) curing coating is a brand-new green environmental protection coating developed in the 1960s. It does not contain volatile organic compounds (VOC), has little environmental pollution, fast curing speed, energy saving, and good performance of cured products. , Suitable for high-speed automatic production and other outstanding advantages, it has been widely used in industrial and high-tech fields. (Reference: Li Xiaoyong. UV Curing Coatings and Its Development Status. Guangzhou Chemistry, 2007, 33(2), 66~72) [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D4/02C09D175/04C09D179/02C09D5/08
Inventor 孙杨张红明李季王献红王佛松
Owner 中科应化(长春)科技有限公司
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