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Anti-fouling and corrosion-resistant epoxy coating and preparation method thereof

An epoxy coating and anti-corrosion technology, applied in the direction of anti-corrosion coatings, epoxy resin coatings, polyamide coatings, etc., can solve the problem of insufficient compatibility between chlorinated paraffin and epoxy coating components, and the change of coating anti-fouling and anti-corrosion effect Poor and other problems, to meet the requirements of industrial production, improve stability and durability, high yield effect

Inactive Publication Date: 2021-06-01
徐松波
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this direct addition method will cause insufficient compatibility between chlorinated paraffin and epoxy coating components. As time goes by, uncrosslinked chlorinated paraffin will migrate to the surface of the coating, resulting in antifouling and anticorrosion effects of the coating become worse

Method used

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  • Anti-fouling and corrosion-resistant epoxy coating and preparation method thereof
  • Anti-fouling and corrosion-resistant epoxy coating and preparation method thereof
  • Anti-fouling and corrosion-resistant epoxy coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Preparation of carboxyl-containing chlorinated paraffin 42: Dissolve 20 g of chlorinated paraffin 42 in 200 mL of acetone, stir to dissolve, add 20 g of p-hydroxybenzoic acid and 30 g of potassium carbonate, and react at 55° C. for 30 h under nitrogen protection. After the reaction, the pH was adjusted to 3.0 with hydrochloric acid, and then extracted with ethanol, and the product was vacuum-dried at 100° C. for 5 h to obtain carboxyl-containing chlorinated paraffin 42.

[0034] (2) Preparation of chlorinated paraffin 42 containing acid chloride: add 70mol carboxyl-containing chlorinated paraffin 42 to the reaction kettle, add 85mol phosphorus trichloride dropwise, stir and heat up to 50°C, react for 6h, cool to room temperature, and stand to separate Layer to obtain chlorinated paraffin 42 containing acid chloride.

[0035] (3) Preparation of hydroxyl-containing chlorinated paraffin 42: add 100mol2,2,3,3,4,4-hexafluoro-1,5-pentanediol and an appropriate amount of a...

Embodiment 2

[0039] (1) Preparation of carboxyl-containing chlorinated paraffin 52: Dissolve 20 g of chlorinated paraffin 52 in 250 mL of butanone, stir to dissolve, add 25 g of p-hydroxybenzoic acid and 28 g of potassium carbonate, and react at 80° C. for 10 h under nitrogen protection. After the reaction, the pH was adjusted to 3.0 with hydrochloric acid, and then extracted with ethanol, and the product was vacuum-dried at 100° C. for 8 hours to obtain carboxyl-containing chlorinated paraffin 52.

[0040] (2) Preparation of chlorinated paraffin 52 containing acid chloride: add 70mol carboxyl-containing chlorinated paraffin 52 to the reaction kettle, add dropwise 85mol phosphorus trichloride, stir and heat up to 70°C, react for 4h, cool to room temperature, let stand to separate layer to obtain the chlorinated paraffin 52 containing the acid chloride.

[0041] (3) Preparation of hydroxyl-containing chlorinated paraffin 52: add 100mol2,2,3,3,4,4-hexafluoro-1,5-pentanediol and an appropriat...

Embodiment 3

[0045] (1) Preparation of carboxyl-containing chlorinated paraffin 70: Dissolve 20 g of chlorinated paraffin 70 in 250 mL of butanone, stir to dissolve, add 25 g of p-hydroxybenzoic acid and 28 g of potassium carbonate, and react at 65° C. for 24 h under nitrogen protection. After the reaction, the pH was adjusted to 3.0 with hydrochloric acid, and then extracted with ethanol. The product was vacuum-dried at 100°C for 8 hours to obtain carboxyl-containing chlorinated paraffin 70.

[0046] (2) Preparation of chlorinated paraffin 70 containing acid chloride: add 70mol carboxyl-containing chlorinated paraffin 70 to the reaction kettle, add dropwise 85mol phosphorus trichloride, stir and heat up to 60°C, react for 5h, cool to room temperature, and stand to separate layer to obtain chlorinated paraffin 70 containing acid chloride.

[0047] (3) Preparation of hydroxyl-containing chlorinated paraffin 70: add 100mol2,2,3,3,4,4-hexafluoro-1,5-pentanediol and an appropriate amount of ac...

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Abstract

The invention discloses an anti-fouling and corrosion-resistant epoxy coating and a preparation method thereof. The epoxy coating comprises a novel epoxy resin. The preparation method of the epoxy resin comprises the following steps of: reacting chlorinated paraffin with p-hydroxybenzoic acid to prepare carboxyl-containing chlorinated paraffin, acylating the carboxyl-containing chlorinated paraffin to obtain acyl chloride-containing chlorinated paraffin, then carrying out esterification reaction on the acyl chloride-containing chlorinated paraffin and 2, 2, 3, 3, 4, 4-hexafluoro-1, 5-pentanediol to obtain fluorine-containing chlorinated paraffin monohydric alcohol, reacting the fluorine-containing chlorinated paraffin monohydric alcohol with 4,4'-oxydiphthalic anhydride to obtain fluorine-containing chlorinated paraffin binary acid, and finally reacting the fluorine-containing chlorinated paraffin binary acid with epichlorohydrin to obtain the waterproof and corrosion-resistant epoxy resin. The preparation method has characteristics of simple operation, wide raw material source and mild reaction condition and meets the requirement of industrial production. The prepared epoxy resin is used for preparing a waterproof and corrosion-resistant coating, and due to introduction of hydrophobic fluorine atoms and cross-linking reaction of chlorinated paraffin, excellent waterproof, oil-proof and corrosion-resistant properties can be provided for the coating.

Description

technical field [0001] The invention relates to an anti-fouling and corrosion-resistant epoxy coating and a preparation method thereof, belonging to the field of anti-fouling and anti-corrosion coatings. Background technique [0002] Epoxy resin is an important thermosetting resin, which has good mechanical properties, corrosion resistance, adhesive properties, stability and other comprehensive properties, and has been widely used in many fields. Epoxy anti-corrosion paint is a type of coating with epoxy resin and modified epoxy resin as the main film-forming substance. It has excellent adhesion, chemical corrosion resistance, good alkali resistance, and hard coating. It is mainly used for corrosion-resistant coating, such as large-scale chemical equipment, internal and external wall coating of pipelines, and can also be used for non-metallic surfaces and electrical appliances, pipeline instruments and other fields used in humid and tropical conditions. [0003] Chlorinated...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D177/00C09D7/61C09D5/08C08G59/12
CPCC08G59/12C08K2003/265C08K2201/011C09D5/08C09D163/00C09D177/00C09D7/61C08L77/00C08K3/30C08K3/26C08L63/00
Inventor 徐松波
Owner 徐松波
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