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Epoxy anticorrosive paint, and preparation method thereof

A technology of epoxy anti-corrosion coating and epoxy resin, which is applied in the field of coatings, can solve the problems of poor corrosion resistance and high temperature resistance of epoxy resin, poor durability of epoxy resin, and reduced adhesion of epoxy resin, etc., to achieve broaden Application range, increasing thermal stability, improving self-cleaning effect

Active Publication Date: 2019-08-23
上海博歌建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Epoxy resin is an important thermosetting resin. The cured epoxy resin has the advantages of good electrical properties, adhesive properties and mechanical properties. It is widely used in mechanical processing, aerospace and other fields. A large amount of epoxy resin molecular chains The rigid benzene ring endows the resin with rigidity and heat resistance; polar groups such as hydroxyl and ether bonds make the epoxy resin have strong adhesion to the base metal after curing, but the corrosion resistance of the epoxy resin itself Poor performance and high temperature resistance. In the prior art, some modifiers are often added to modify it, but the durability of physically modified epoxy resin is poor. Chemical modification is often used with epoxy resin end rings. Oxygen grafting method, this method will reduce the adhesion performance of epoxy resin, resulting in weakened adhesion of the modified epoxy resin, and the epoxy coating after coating is easy to fall off

Method used

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  • Epoxy anticorrosive paint, and preparation method thereof
  • Epoxy anticorrosive paint, and preparation method thereof
  • Epoxy anticorrosive paint, and preparation method thereof

Examples

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preparation example Construction

[0047] Preparation of S6 modified epoxy resin

[0048] Add 1kg of epoxy resin to the reactor, then add 200g of modifier E, stir evenly, heat to 100°C, then add 25ml of triethylamine dropwise, add dropwise within 30min, keep warm and continue stirring for 2h, Get modified epoxy resin;

[0049] The structure of possible modified epoxy resins is as follows:

[0050]

[0051] The alcoholic hydroxyl group on the epoxy resin can react with the two epoxy groups on the modifier E, or one molecule of the modifier E can be cross-linked with 2 molecules of the epoxy resin, thereby embedding and connecting the modifier E Branch into epoxy resin;

[0052] The infrared characterization of the modified epoxy resin is as follows: IR(KBr): 3032, 3005 (benzene ring), 2964, 2920 (-CH 2 -, -CH 3 ),1375(-CH 3 ), 1294, 1205 (-C-N), 1180 (-O-Si-C-), 915 (epoxy) cm -1 .

Embodiment 1

[0054] An epoxy anticorrosive coating, comprising raw materials of the following weights: 100g of modified epoxy resin, 80g of pigments and fillers, 5g of dispersant, 15g of film forming aid, 1g of leveling agent, and 1g of defoamer;

[0055] A preparation method of epoxy anticorrosive paint is as follows: put the raw materials of epoxy anticorrosive paint into a mixing tank for premixing for 5 minutes, and then melt and extrude the premix. The extrusion parameters are: one zone 120°C , The second zone 180℃, screw speed 50Hz extruded flakes are put into a ball mill for grinding, the speed of the ball mill is 2200rpm, the ground coarse powder is sieved through a 200-mesh sieve to obtain 10-80 micron fine powder as the final Epoxy anticorrosive coating.

Embodiment 2

[0057] An epoxy anticorrosive coating, comprising raw materials of the following weights: 100g of modified epoxy resin, 120g of pigments and fillers, 2g of dispersant, 20g of film-forming aids, 3g of leveling agent, and 3g of defoamer;

[0058] A preparation method of epoxy anticorrosive paint is as follows: put the raw materials of epoxy anticorrosive paint into a mixing tank for premixing for 10 minutes, and then melt and extrude the premix. The extrusion parameters are: 120°C in one zone , The second zone is 180℃, the screw speed is 50Hz, and the extruded flakes are put into a ball mill for grinding. The speed of the ball mill is 1600rpm. The ground coarse powder is sieved through a 200-mesh sieve to obtain a fine powder of 10-80 microns. Epoxy anticorrosive coating.

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Abstract

The invention discloses an epoxy anticorrosive paint, and a preparation method thereof. The epoxy anticorrosive paint comprises, by weight, 100 parts of modified epoxy resin, 80 to 120 parts of a pigment filler, 2 to 5 parts of a dispersant, 15 to 20 parts of a film forming auxiliary agent, 1 to 3 parts of a leveling agent, and 1 to 3 parts of an antifoaming agent. According to the preparation method, epoxy resin is modified without influencing the viscosity of epoxy resin, active anticorrosive functional groups are introduced into the epoxy resin through grafting, so that the epoxy resin paint is provided with excellent scrubbing resistance, shedding of the anticorrosive function groups is not easily caused, and the corrosion resistance of the epoxy resin paint can be maintained for a long term.

Description

Technical field [0001] The invention belongs to the technical field of coatings, and specifically relates to an epoxy anticorrosive coating and a preparation method thereof. Background technique [0002] Epoxy resin is an important thermosetting resin. The cured epoxy resin has the advantages of good electrical properties, adhesive properties and mechanical properties. It is widely used in mechanical processing, aerospace and other fields. A large number of epoxy resin molecular chains The rigid benzene ring gives the resin rigidity and heat resistance; the polar groups such as hydroxyl and ether bonds make the epoxy resin have strong adhesion to the base metal after curing, but the epoxy resin itself is corrosion resistant In the prior art, some modifiers are often added to modify it. However, the durability of physically modified epoxy resins is poor, and chemical modification is often used with epoxy resin end rings. Oxy-oxy grafting method, this method will reduce the adhesi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/10C09D163/00C09D5/08C08G77/42
CPCC08G77/42C09D5/08C09D163/00C09D183/10
Inventor 何文霞
Owner 上海博歌建材有限公司
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