Environment-friendly coating material defoamer preparation method

A defoamer, an environmentally friendly technology, applied in the field of preparation of environmentally friendly coating defoamers, can solve the problems of poor foam suppression ability, low water solubility, low surface tension, etc., achieve good defoaming effect, aging resistance and service life , Excellent surface activity effect

Inactive Publication Date: 2020-02-28
郑州中岳高新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a defoamer, silicone has low surface tension, low water solubility, excellent temperature resistance, wide application temperature range, weather resistance, physiological inertness, etc., strong foam breaking ability, but poor foam suppression ability. carry out certain modifications

Method used

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  • Environment-friendly coating material defoamer preparation method
  • Environment-friendly coating material defoamer preparation method
  • Environment-friendly coating material defoamer preparation method

Examples

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preparation example Construction

[0022] Such as figure 1 , shown, a kind of preparation method of environment-friendly coating defoamer, comprises the following steps:

[0023] Step 1. Add octamethylcyclotetrasiloxane, 1,3,5,7-tetramethyltetrahydrocyclotetrasiloxane, hexamethyldisiloxane and catalyst concentrated sulfuric acid into the condenser with stirring and reflux In a multi-port reaction kettle, heat it to 60-100°C with a constant temperature oil bath, and react for 8-12 hours;

[0024] Step 2. Slowly add calcium hydroxide and anhydrous magnesium sulfate to the solution described in step 1, react for 4-8 hours at a temperature of 20-60°C, adjust the pH of the solution to 6-8, and filter to obtain a colorless and clear clear solution;

[0025] Step 3, adding allyl polyether and chloroplatinic acid into the solution described in Step 2, heating to 100-150°C with a constant temperature oil bath, and reacting for 6-18 hours to obtain a polyether-modified silicone solution;

[0026] Step 4, add deionized...

Embodiment 1

[0034] Step 1. In a 250ml four-necked glass flask, add 100g of octamethylcyclotetrasiloxane, 7.17g of 1,1,3,3-tetramethyldihydrodisiloxane, 3.2g of concentrated sulfuric acid, and use a constant temperature Heat the oil bath to 60°C and react for 8 hours;

[0035] Step 2: Add 2.42g of calcium hydroxide into the solution, adjust the pH value to 6-7, and filter the product with a vacuum pump after neutralization;

[0036] Step 3: Add 4.08g of anhydrous magnesium sulfate into the solution, heat to 20°C with a constant temperature oil bath, react for 4 hours, and filter with a vacuum pump;

[0037] Step 4: Add 45g of allyl polyether into the solution, react for 6 hours at a temperature of 100°C, and discharge;

[0038] Step 5: Add 100g of deionized water, 3g of Tween 80, 6g of Span 80, and 1.5g of alkylphenol polyoxyethylene ether into a 500ml four-necked glass flask, and react for 2 hours at a temperature of 20°C. Add 20g of the polyether-modified silicone described in step 4, ...

Embodiment 2

[0041] Step 1. In a 250ml four-necked glass flask, add 100g of octamethylcyclotetrasiloxane, 7.17g of 1,1,3,3-tetramethyldihydrodisiloxane, 3.2g of concentrated sulfuric acid, and use a constant temperature Heat the oil bath to 80°C and react for 8 hours;

[0042] Step 2: Add 2.42g of calcium hydroxide into the solution, adjust the pH value to 6-7, and filter the product with a vacuum pump after neutralization;

[0043] Step 3: Add 4.08g of anhydrous magnesium sulfate into the solution, heat to 60°C with a constant temperature oil bath, react for 4 hours, and filter with a vacuum pump;

[0044] Step 4: Add 45g of allyl polyether into the solution, react for 6 hours at a temperature of 130°C, and discharge;

[0045] Step 5: Add 100g of deionized water, 3g of Tween 80, 6g of Span 80, and 1.5g of alkylphenol polyoxyethylene ether into a 500ml four-neck glass flask, and react for 2 hours at a temperature of 60°C. Add 20g of the polyether-modified silicone described in step 4, re...

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Abstract

The invention relates to an environment-friendly coating material defoamer preparation method, which comprises: 1, mixing octamethylcyclotetrasiloxane and concentrated sulfuric acid, and reacting under a heating condition to prepare hydrogen-containing silicone oil; 2, mixing the hydrogen-containing silicone oil and allyl polyether, and reacting under a heating condition to prepare polyether modified organic silicon; and 3, mixing the polyether modified organic silicon, deionized water and a surfactant, and reacting under a heating condition to prepare an aqueous coating material defoamer. According to the invention, the prepared environment-friendly coating material defoamer overcomes the use limitation of the traditional organic silicon defoaming agent, has excellent characteristics of self-emulsifying, self-dispersing, stable emulsifying property, good defoaming and foam inhibition property, high-temperature resistance, acid resistance and alkali resistance, has advantages of high defoaming speed, high foam inhibition capacity and long action time compared with foreign products, has good development prospects, can replace foreign products, and enhances the competitiveness of domestic products.

Description

technical field [0001] The invention relates to a preparation method of an environment-friendly paint defoamer, and more specifically, to a paint defoamer with a main component of polyether-modified silicone. Background technique [0002] Foam is a phenomenon that people often see in daily life and industrial production. It can be used in washing, flotation, dust removal, fire extinguishing, manufacturing foam plastics and foam ceramics. Sometimes in order to obtain a large number of bubbles and foam, often need Add foaming agent; but in the process of coating manufacturing, the existence of foam will affect the production and product quality, so it must be eliminated. In order to eliminate bubbles and foam, it is usually necessary to add defoamer. [0003] The function of the defoamer has two aspects, one is used as a foam breaker, mainly to destroy the existing foam; the other is an antifoam agent, that is, to prevent the generation of foam, usually these two aspects are u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D7/65C08G77/46B01D19/04
CPCB01D19/0404B01D19/0409C08G77/46C09D7/65
Inventor 李建功
Owner 郑州中岳高新材料有限公司
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