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Preparation method of coalescing agent, coalescing agent and coating containing coalescing agent

A film-forming aid and coating technology, applied in the coating field, can solve the problems of non-renewable resources, high volatility, environmental pollution, etc., and achieve the effects of shortened reaction time, less by-products, and simple preparation process

Active Publication Date: 2021-02-12
RUNTAI CHEM TAIXING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the film-forming aids of alcohol ethers have good compatibility with emulsions, they are derived from petroleum-based non-renewable resources, have high volatility and high toxicity, and will cause serious pollution to the environment.

Method used

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  • Preparation method of coalescing agent, coalescing agent and coating containing coalescing agent
  • Preparation method of coalescing agent, coalescing agent and coating containing coalescing agent
  • Preparation method of coalescing agent, coalescing agent and coating containing coalescing agent

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preparation example Construction

[0024] A preparation method of film-forming aid, comprising the following steps:

[0025] Add tung oil, diethanolamine, benzothiazole acidic ionic liquid catalyst, acetic acid and petroleum ether into the container, slowly heat up to 50-90°C to obtain a mixed solution, and drop hydrogen peroxide into the mixed solution within 1-5 hours solution, and then keep it warm for 1-15 hours. After the reaction, cool to room temperature and filter. The filter cake is an ionic liquid liquid. The lower water layer is removed, the oil layer is dried, and the solvent is removed to obtain epoxy ligoleoyl diethanolamine, which is the film-forming aid, and the reaction formula is as follows:

[0026]

[0027] The mol ratio of described tung oil, diethanolamine, acetic acid and hydrogen peroxide solution is: n (tung oil): n (diethanolamine): n (acetic acid): n (hydrogen peroxide solution): n (petroleum ether)=1: (3~6):(6~9):(6~12):(2~4).

[0028] The benzothiazole acidic ionic liquid catal...

Embodiment 1

[0037] The preparation method of the film-forming aid of the present embodiment comprises the following steps: adding tung oil, diethanolamine, acetic acid and petroleum ether into a mixture equipped with electric stirring, a thermometer, and a dropping funnel according to a molar ratio of 1:3.6:6.6:3. and the four-necked reaction flask of the condensing pipe, then add the benzothiazole phosphate liquid catalyst, the weight of the benzothiazole phosphate liquid catalyst is 0.5% of the weight of tung oil, put the reaction flask in a constant temperature water bath, stir at room temperature, slowly Heat up to 65°C to obtain a mixed solution, then add dropwise a hydrogen peroxide solution with a mass fraction of 30% to the mixed solution while stirring, wherein the molar ratio of the hydrogen peroxide solution to tung oil is 10.2:1, and then keep warm 10h, after the reaction is over, cool to room temperature, at this time, benzothiazole phosphate condenses into a solid, filter to ...

Embodiment 2

[0040]The preparation method of the film-forming aid of the present embodiment comprises the following steps: adding tung oil, diethanolamine, acetic acid and petroleum ether into a mixture equipped with electric stirring, a thermometer and a dropping funnel according to the molar ratio of 1:4.0:6.6:3. and the four-necked reaction flask of the condensing tube, then add the benzothiazole phosphate catalyst, the weight of the benzothiazole phosphate is 0.3% of the weight of tung oil, put the reaction flask in a constant temperature water bath, and after stirring at room temperature, slowly heat up to to 90°C to obtain a mixed solution, and then dropwise add a hydrogen peroxide solution with a mass fraction of 30% to the mixed solution while stirring, wherein the molar ratio of the hydrogen peroxide solution to tung oil is 8:1, and then keep warm for 12h, and react After finishing, cool to room temperature, at this moment, benzothiazole phosphate condenses into solid, remove benzo...

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Abstract

The invention relates to the technical field of coatings, in particular to a preparation method of a coalescing agent, the coalescing agent and a coating containing the coalescing agent. The preparation method of the coalescing agent comprises the following steps: adding tung oil, diethanolamine, acetic acid and petroleum ether into a container, heating to 50-90 DEG C, adding a benzothiazole acidic ionic liquid catalyst to obtain a mixed solution, dropwise adding a hydrogen peroxide solution into the mixed solution, keeping the temperature for 1-15 hours, after the reactions, cooling, filtering, adjusting the pH value of the obtained filtrate to be neutral, standing for layering, removing a lower water layer, washing the oil layer, removing the lower water layer, drying the oil layer obtained again, and removing the solvent, so as to obtain the coalescing agent namely epoxy tung oil acyl diethanolamine. The invention also discloses a coalescing agent and a coating containing the coalescing agent, and the coating provided by the invention has excellent anti-blocking property, high glossiness and low minimum film-forming temperature, and can effectively reduce the VOC content in thecoating.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a preparation method of a film-forming aid, a film-forming aid and a paint containing the film-forming aid. Background technique [0002] Coalescing aids are strong solvents for polymer latex particles, used to reduce the glass transition temperature (Tg) of the polymer in the emulsion in water-based paints, thereby reducing the minimum film-forming temperature (MMFT) of water-based paints, making water-based paints in a relatively Forming a film at a low temperature can improve the scrub resistance, color development, weather resistance and many other properties of the coating film. Therefore, the film-forming aid is an indispensable key material in water-based coatings. Alcohol ethers, such as ethylene glycol ethers, diethylene glycol ethers or propylene glycol phenyl ethers, are the most commonly used coalescents. Although the film-forming aids of alcohol ethers have good co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D301/16C07D303/46C09D133/04C09D125/14C09D7/63
CPCC07D301/16C07D303/46C09D133/04C09D125/14C09D7/63C08K5/20
Inventor 张海飞陈松张世元崔唯
Owner RUNTAI CHEM TAIXING CO LTD
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