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Method for preparing environment-friendly and efficient water-borne coating dispersing agent

A technology of water-based paint and dispersant, applied in the direction of coating, etc., can solve the problems of poor environmental safety, low equipment efficiency, complex process, etc., and achieve the effect of less supporting equipment, high cost performance, and simple and convenient operation

Inactive Publication Date: 2014-04-09
长沙华润涂料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing methods are complicated in process, energy-consuming, low in equipment efficiency, poor in environmental protection and safety, and the product performance needs to be further improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add 50 kg of water, 8 kg of sodium methacrylate, 0.6 kg of sodium gluconate, 30 kg of acrylic acid, and 8 kg of methyl acrylate to the container in sequence. After fully mixing and dissolving, place in 60 In the Coγray field, the initial reaction temperature is 15°C, the radiation dose is 1KGy, and the dose unevenness is less than 1.5. After the polymerization is completed, neutralize it with 30% sodium hydroxide solution to pH 6.5 to obtain a water-based paint dispersant. .

Embodiment 2

[0027] Add 80 kg of water, 2 kg of sodium methacrylate, 0.8 kg of sodium gluconate, 5 kg of acrylic acid, and 0.5 kg of methyl acrylate to the container in sequence. After fully mixing and dissolving, place in 60 In the Coγ-ray field, the initial reaction temperature is 15°C, the radiation dose is 5 KGy, and the dose unevenness is less than 1.5. After the polymerization is completed, neutralize it with 30% potassium hydroxide solution to pH 7.0 to obtain a water-based coating dispersant. .

Embodiment 3

[0029] Add 70 kg of water, 0.4 kg of sodium methacrylate, 1.0 kg of sodium gluconate, 10 kg of acrylic acid, and 1.0 kg of methyl acrylate to the container in sequence. After fully mixing and dissolving, place in 60 In the Coγ-ray field, the initial reaction temperature is 35°C, the radiation dose is 2 KGy, and the dose unevenness is less than 1.5. After the polymerization is completed, neutralize it with 27% ammonia solution to pH 11 to obtain a water-based coating dispersant.

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PUM

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Abstract

The invention discloses a method for preparing an environment-friendly and efficient water-borne coating dispersing agent. The method comprises the following steps of: mixing acrylic acid, sodium methallyl sulfonate, sodium gluconate, methyl acrylate and water according to a certain mass percentage; performing polymerization reaction on the components in a 60 Cogamma ray field at the temperature of 0-45 DEG C to ensure that the radiation dosage is between 0.5 and 10 KGy and the dosage is unevenly less than 1.5 to obtain an acrylic copolymer; and regulating pH of the acrylic copolymer to 6-11 by using alkali to obtain the acrylic acid series water-borne coating dispersing agent. The method has the advantages that the acrylic copolymer water-borne coating dispersing agent is synthetized once without adding chemical initiator, the chemical initiator residues are not contained, and phosphorus compound which obviously pollutes the environment, and alcohol or sulfite serving as a molecular weight regulator are not used, so that the energy consumption is reduced, the reaction speed is high, the lustre of the product is good, the product is nearly colorless, and the performance is high. The water-borne coating dispersing agent obtained by the method can be used for ceramic preparation.

Description

technical field [0001] The invention relates to a method for preparing an organic polymer, in particular to a method for preparing an organic polymer water-based paint dispersant by using carbon-carbon unsaturated bonds and organic salt ingredients as raw materials. Background technique [0002] At present, domestic related literatures have reported the preparation method of water-based paint dispersants, but there is no use of chemical initiators, nor the use of phosphorus compounds, alcohols, or sulfites that have obvious pollution to the environment as molecular weight regulators. Preparation method of high-performance water-based coating. The preparation methods that have been used in the prior art mostly use hypophosphite, isopropanol or sodium bisulfite, etc. as molecular weight modifiers to polymerize at a relatively high initial temperature, to batch or drop a single The polymer and the initiator control the polymerization reaction speed and uniformity to obtain a w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D7/12C08F220/06C08F228/02C08F220/14C08F2/46
Inventor 林均红
Owner 长沙华润涂料有限公司