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Semi-enclosed organic amine curing agent and application thereof to anti-corrosive coating

A semi-closed, organic amine technology, applied in the direction of anti-corrosion coatings, epoxy resin coatings, coatings, etc., can solve the problems of low corrosion resistance temperature, high corrosion resistance temperature, unsatisfactory, etc., and achieve the effect of improving anti-corrosion performance

Active Publication Date: 2011-08-17
CHONGQING SANXIA PAINTS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention aims at the low corrosion resistance temperature of the epoxy resin curing agent in the prior art, which cannot meet the needs of higher corrosion resistance temperature, strong acid and strong alkali resistance, and the front surface of the substrate to be coated in the coating construction. High processing requirements, increased construction costs and other deficiencies, providing a semi-closed organic amine curing agent as a key component of anti-corrosion coatings and its application in anti-corrosion coatings

Method used

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Examples

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preparation example Construction

[0043] The synthetic method of semi-closed type organic amine solidifying agent of the present invention, it comprises the steps:

[0044] Step 1: Put the amine and ketone weighed according to the proportion into the reaction kettle, stir evenly, raise the temperature to 110~180°C, react for 4~10 hours, release water from the water separator at regular intervals; after the reaction is completed, cool down to Filtrate and discharge below 50°C to obtain a semi-closed organic amine curing agent that seals the primary amine and retains the secondary amine. The organic amine curing agent is a low molecular weight substance of ketimine;

[0045] Step 2: Dissolve the epoxy resin weighed according to the proportion in a solvent, raise the temperature to 85~100°C, reflux to remove the external moisture, then cool down to below 80°C and add the semi-closed organic amine curing agent obtained in step 1. Keep the reaction at 50~100°C for a period of time, keep reflux to remove moisture, c...

Embodiment 1

[0061] 1. Preparation of semi-closed special organic amine curing agent

[0062] (1) Weigh 200Kg of triethylenetetramine and 800Kg of methyl isobutyl ketone, put them into a stainless steel reaction kettle, pad methyl isobutyl ketone in the water separator, start stirring, heat up to reflux, and keep reflux, every 30 minutes Discharge water from the water separator once (adjust the interval according to the temperature and water outlet conditions). As the reaction progresses, the temperature in the kettle gradually rises. When the temperature reaches 140°C, start timing. After about 6 hours of reaction, the cumulative water output reaches the total feeding amount. 10.5% or more, the temperature can be lowered, the temperature is below 40°C, filtered, discharged, and the air in the packaging barrel is replaced with nitrogen, and then packaged for later use.

[0063] (2) Weigh 400Kg of E-20 epoxy resin, 250Kg of toluene, put it in a stainless steel reaction kettle, put toluene i...

Embodiment 2

[0071] 1. Preparation of semi-closed special organic amine curing agent

[0072] (1) Weigh 350Kg of diethylenetriamine and 650Kg of methyl isobutyl ketone, put them into a stainless steel reaction kettle, pad methyl isobutyl ketone in the water separator, start stirring, heat up to reflux, and maintain reflux, every 30 minutes Discharge water once from the water separator (adjust the interval according to the temperature and water outlet conditions). As the reaction progresses, the temperature in the kettle gradually rises. When the temperature reaches 140°C, start timing. After more than 6 reaction hours, the cumulative water output reaches the total feeding amount. 10.5% or more, the temperature can be lowered, the temperature is below 40°C, filtered, discharged, and the air in the packaging barrel is replaced with nitrogen, and then packaged for later use.

[0073] (2) Weigh 350Kg of E-20 epoxy resin, 250Kg of xylene, put it in a stainless steel reaction kettle, put xylene ...

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Abstract

The invention discloses a semi-enclosed organic amine curing agent, which is characterized by being obtained by mixing and reacting the following substances in percentage by weight: 15-40 percent of epoxy resin, 5-12 percent of amine, 15-35 percent of ketone and 20-35 percent of solvent, wherein the epoxy resin is bisphenol A epoxy resin or bisphenol F epoxy resin; the amine is diethylenetriamineor triethylene tetramine; the ketone is methyl isobutyl ketone or ethyl methyl ketone; and the solvent is toluene or xylene or a mixture of toluene and xylene in any ratio or normal butanol or isobutyl alcohol or a mixture of normal butanol and isobutyl alcohol in any ratio. Semi-enclosed organic amine obtained by multi-step synthesis is cross-linked with epoxy resin and naturally dried into a film, the cross-linked product is de-capsulated into primary amine for further curing with moisture in the air or moisture on the surface of a substrate, and the curing agent is partially enclosed, so that the service life of reactive double-component paint can be greatly prolonged after mixing; and epoxy resin is introduced into the curing agent to form a multi-aromatic ring anti-corrosive prepolymer, so that the corrosion resistance of a final film forming substance is further enhanced.

Description

technical field [0001] The invention relates to the technical field of anticorrosion coating film-former preparation and coating preparation technology, in particular to the composition and preparation method of a semi-closed organic amine curing agent, which is a key component of an anticorrosion coating with low surface treatment, and its application in anticorrosion coatings. Background technique [0002] Anti-corrosion coatings are widely used in modern industry, transportation, energy, marine engineering and other departments, accounting for 30% of epoxy resin anti-corrosion coatings, most of which are cured by epoxy groups and amines. The workability and anti-corrosion performance of the paint play a very important role. [0003] In the prior art, prior to the coating of anti-corrosion coatings, the surface of the substrate to be coated is firstly required to be strictly treated; when epoxy anti-corrosion coatings are selected, most of them are epoxy resins and organ...

Claims

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Application Information

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IPC IPC(8): C08G59/50C09D163/00C09D7/12C09D5/08
Inventor 廖锦陈实王秀英冉智矩冯飞飞冯艳
Owner CHONGQING SANXIA PAINTS CO LTD
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