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A kind of low-temperature curing agent composition for epoxy anticorrosion coating

An epoxy anti-corrosion and curing agent technology, applied in anti-corrosion coatings, epoxy resin coatings, coatings, etc., can solve the problems of poor mechanical properties of the cured paint film, unsatisfactory low-temperature curing performance, and sticky surface of the cured paint film. , to achieve the effect of improving compatibility, good adhesion and corrosion resistance, and good compatibility

Active Publication Date: 2015-12-30
CNOOC CHANGZHOU PAINT & COATINGS IND RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is: provide a kind of low-temperature curing agent composition that is used for epoxy anticorrosion coating, overcome the low-temperature curing property that the above-mentioned method that adopts low-temperature curing aminizing agent and curing accelerator to be used in combination exists Unsatisfactory, poor mechanical properties of the cured paint film, sticky and white surface of the cured paint film, and many technical shortcomings that cannot meet the requirements of anti-corrosion performance, and obtain a low-temperature curing agent combination for epoxy anti-corrosion coatings that has excellent comprehensive performance and meets the needs of practical applications. thing

Method used

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  • A kind of low-temperature curing agent composition for epoxy anticorrosion coating
  • A kind of low-temperature curing agent composition for epoxy anticorrosion coating
  • A kind of low-temperature curing agent composition for epoxy anticorrosion coating

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Embodiment 1

[0022] Embodiment 1 prepares the adduct of polyamine

[0023] The polyamine adduct of the present invention is that the polyamine is modified by addition of novolac epoxy resin, and then the unreacted polyamine monomer is removed by vacuuming, and then the obtained adduct is obtained by using a monofunctional compound containing a benzene ring. It is obtained by adding and modifying glycidyl ether of high degree, wherein the ratio of polyamine, novolac epoxy resin, and monofunctional glycidyl ether containing benzene ring is 10-15:1-1.5:1 by weight ~1.5, the polyamine used is one or both of diethylenetriamine and triethylenetetramine.

[0024] (1) The dosage of each raw material is shown in Table 1.

[0025] Table 1

[0026]

[0027] (2) Preparation method

[0028] ① First, add 12 parts by weight of polyamine to the reaction kettle, stir at a speed of 600-800 rpm, and heat to 40-45°C in a water bath;

[0029] ② After diluting 1.2 parts by weight of novolac epoxy resin w...

Embodiment 2

[0033] Embodiment 2 prepares the Mannich base of polyamine

[0034] The Mannich base of the polyamine of the present invention is that polyamine reacts with the phenolic compound containing long carbon chain, 37wt% formaldehyde aqueous solution and obtains, the weight part of the phenolic compound containing long carbon chain, polyamine, 37wt% formaldehyde solution The ratio is 10:4~6:2~3, wherein the polyamine is a mixture of m-xylylenediamine and trimethylhexamethylenediamine;

[0035] (1) The specific formula is shown in Table 2.

[0036] Table 2

[0037]

[0038] (2) Preparation method:

[0039] Under normal temperature conditions, add phenolic compounds containing long carbon chains, polyamines and 37wt% formaldehyde aqueous solution at a weight ratio of 10:4:3 to the reaction vessel, then heat up to 80-85°C and react at this temperature for 5 For ~6 hours, keep stirring at 600-800 rpm during the heating and heat preservation process, and distill and dehydrate at a ...

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Abstract

The invention relates to a low-temperature curing agent composition for epoxy anticorrosive paint. The low-temperature curing agent composition comprises following components in parts by weight: 50-60 parts of polyamine affixture, 20-30 parts of polyamine mannes alkali, 5-10 parts of fatty amine and 10-20 parts of mixed solvent, wherein the polyamine affixture is prepared by carrying out addition modification on polyamine by using novolac epoxy and monofunctional glycidyl ether containing a benzene ring in a heating manner, the mannes alkali of the polyamine is prepared through reaction of polyamine with a phenol compound with a long carbon chain and 37% formaldehyde solution; a fatty amine is an amine with a structure of (CH3)2N(CH2)nNH2, wherein n is 3-5, and the mixed solvent is a mixture of xylene and n-butyl alcohol which are in a mass ratio of 4:1. The epoxy anticorrosive paint prepared by the low-temperature curing agent composition has excellent low-temperature curing performance, does not turn white or get tacky, and has excellent physical and mechanical properties and anticorrosion performance.

Description

technical field [0001] The invention relates to a low-temperature curing agent composition for epoxy anticorrosion coatings. Background technique [0002] Epoxy anti-corrosion coatings generally use amines as curing agents, and the final cured paint film has excellent adhesion, water resistance, corrosion resistance and chemical resistance, which can meet the requirements of the heavy anti-corrosion field. Common amine curing agents are polyamides, modified aliphatic amines, modified alicyclic amines, and Mannich bases. When these amine curing agents are used in epoxy anti-corrosion coatings, the biggest problem is that the low-temperature curing performance is relatively poor. Usually, the curing is significantly slower below 10°C, and basically does not cure below 5°C. However, the actual use environment of epoxy anti-corrosion coatings requires that it should have good low-temperature curing performance. At present, there are many technical solutions for the low-tempera...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D7/12C08G59/50C09D163/00C09D5/08C08G59/14
Inventor 方健君马胜军沈海鹰靳美亮徐科
Owner CNOOC CHANGZHOU PAINT & COATINGS IND RES INST
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