A kind of emulsion and preparation method thereof

An emulsion, phase inversion technology, applied in coatings, anti-corrosion coatings, epoxy resin coatings, etc., can solve the problems of insufficient anti-corrosion performance, difficult deep grinding, poor corrosion resistance, etc., saving manpower and reducing pinholes , the effect of low price

Active Publication Date: 2021-01-12
CHANGCHUN SHUNFENG XINCHENG BUILDING MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as a water-based matrix, its poor corrosion resistance is still an unavoidable shortcoming in its production and use.
In actual use, the base metal must be polished very smooth before it can be used. For base materials with complex shapes, deep grinding is extremely difficult, and its anti-corrosion performance is not good enough after use.

Method used

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  • A kind of emulsion and preparation method thereof
  • A kind of emulsion and preparation method thereof
  • A kind of emulsion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Purification of humic acid: Take 30g of humic acid in a 350ml three-neck bottle equipped with a stirrer, add 200ml of absolute ethanol, heat the three-necked bottle in a water bath, start the stirrer (speed 200r / min ), until the liquid boils, take out and filter, and vacuum dry at 45°C for 12 hours to obtain the purified humic acid;

[0024] (2) Preparation of emulsion: Add 5g of water-based epoxy resin into a three-neck bottle equipped with a thermometer and a stirrer, stir for 15min (rotation speed: 200r / min), add 2g of purified humic acid, and add 3 drops of concentrated sulfuric acid As a reaction catalyst, the reaction was continued at 50°C for 3 hours, 50ml of water was slowly added, and an emulsion was obtained by phase inversion method.

Embodiment 2

[0026] (1) Purification of humic acid: Take 30g of humic acid in a 350ml three-neck bottle equipped with a stirrer, add 200ml of absolute ethanol, heat the three-necked bottle in a water bath, start the stirrer (speed 200r / min ), until the liquid boils, take out and filter, and vacuum dry at 45°C for 12 hours to obtain the purified humic acid;

[0027] (2) Preparation of emulsion: Add 5g of water-based epoxy resin into a three-neck bottle equipped with a thermometer and a stirrer, stir for 25min (rotation speed: 220r / min), add 3g of purified humic acid, and add 5 drops of concentrated sulfuric acid As a reaction catalyst, the reaction was continued at 50°C for 3 hours, 50ml of water was slowly added, and an emulsion was obtained by phase inversion method.

Embodiment 3

[0029] (1) Purification of humic acid: Take 30g of humic acid in a 350ml three-neck bottle equipped with a stirrer, add 200ml of absolute ethanol, heat the three-necked bottle in a water bath, start the stirrer (speed 200r / min ), until the liquid boils, take out and filter, and vacuum dry at 45°C for 12 hours to obtain the purified humic acid;

[0030] (2) Preparation of emulsion: Add 5g of water-based epoxy resin into a three-neck bottle equipped with a thermometer and a stirrer, stir for 20min (rotation speed: 250r / min), add 2g of purified humic acid, and add 5 drops of concentrated sulfuric acid As a reaction catalyst, the reaction was continued at 50°C for 3 hours, 50ml of water was slowly added, and an emulsion was obtained by phase inversion method.

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Abstract

The invention provides emulsion and a preparation method thereof. By molecular design, humic acid is grafted to a side chain of epoxy resin; in a coating process, by intrinsic metal ion adsorption andchelation effects of humic acid, residual rust on the steel surface can be stably and firmly attached to a base material to avoid corrosion development; by grafting of humic acid and epoxy resin, density of epoxy resin is improved, and the film forming performance and weather resistance of epoxy resin are improved. The emulsion is applicable to various base materials and excellent in paint film adhesion force, and corrosion resistance and weather resistance are improved as compared with those of common epoxy resin; the service life of coating is prolonged, a coating process is simplified, andmanpower and material resources are greatly saved.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to an epoxy emulsion for rust-resistant anti-rust coatings capable of stabilizing iron rust and converting iron rust into stable compounds and having good weather resistance. Background technique [0002] In recent years, the concept of environmental protection has been advocated, and water-based coatings have attracted more and more attention. Among many water-based resins, water-based epoxy resin has good weather resistance, acid and alkali resistance, and small dry film shrinkage, so it is widely used in practice. However, as a water-based substrate, its poor corrosion resistance is still an unavoidable shortcoming in its production and use. In actual use, the base metal must be polished very smooth before it can be used. For base materials with complex shapes, deep grinding is extremely difficult, and its anti-corrosion performance is not good enough after use. Therefore, it ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D5/08
CPCC09D5/08C09D163/00C08K5/357
Inventor 刘春峰吕会勇王杨松周龙张文强
Owner CHANGCHUN SHUNFENG XINCHENG BUILDING MATERIAL CO LTD
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