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High-molecular copolymer dispersant for paint and preparation method thereof

A technology of high molecular copolymer and dispersant, applied in coating and other directions, can solve the problems of complex process, environmental pollution, increase cost, etc., and achieve the effect of simple process, good viscosity reduction effect and low cost

Inactive Publication Date: 2017-02-15
BEIJING MAYOR CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the previous patent, there are introductions about the use of isopropanol and other alcohols as chain transfer agents, and the use of xylene, ethylene glycol and other solvents as co-solvents in production. In this way, the solvent needs to be recovered after production. The process is complicated and indirectly improves In addition to the cost, it is also polluting the environment

Method used

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  • High-molecular copolymer dispersant for paint and preparation method thereof
  • High-molecular copolymer dispersant for paint and preparation method thereof
  • High-molecular copolymer dispersant for paint and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A polymer copolymer dispersant for coatings is made of the following components by mass percentage:

[0029] 5kg of potassium persulfate, 10kg of sodium bisulfite, 150kg of acrylic acid, 100kg of maleic anhydride, 420kg of aqueous sodium hydroxide solution with a mass fraction of 40%, and 315kg of water.

[0030] The preparation method is as follows:

[0031] 1) Mix water, sodium bisulfite and maleic anhydride, and then heat up to 50°C to obtain the first mixed solution;

[0032] 2) adding 10% potassium persulfate aqueous solution and acrylic acid to the first mixed solution dropwise, and the addition was completed within 2 hours, and then kept at 60° C. for 3 hours to obtain the second mixed solution; The second mixed liquid was cooled to room temperature, and the pH value of the second mixed liquid was adjusted to 7 with a 40% aqueous sodium hydroxide solution by mass fraction to obtain a polymer copolymer dispersant. The polymer copolymer dispersant is a yellow tra...

Embodiment 2

[0034] A polymer copolymer dispersant for coatings is made of the following components by mass percentage:

[0035] 8kg of ammonium persulfate, 14kg of sodium pyrophosphate, 150kg of acrylic acid, 50kg of methacrylic acid, 50kg of maleic anhydride, 368kg of aqueous sodium hydroxide solution with a mass fraction of 40%, and 360kg of water.

[0036] The preparation method is as follows:

[0037] 1) Mix water, sodium pyrophosphate and maleic anhydride, and then heat up to 80°C to obtain the first mixed solution;

[0038] 2) Add dropwise an aqueous solution of ammonium persulfate, acrylic acid and methacrylic acid with a mass percentage of 9% to the first mixed solution, and complete the dropwise addition within 3 hours, and then keep the temperature at 70° C. for 2 hours to obtain the second mixed solution liquid; the second mixed liquid was cooled to room temperature, and the pH value of the second mixed liquid was adjusted to 7 with a 40% aqueous sodium hydroxide solution by m...

Embodiment 3

[0040] A polymer copolymer dispersant for coatings is made of the following components by mass percentage:

[0041] 10kg of ammonium persulfate, 10kg of sodium hypophosphite, 200kg of acrylic acid, 50kg of methacrylic acid, 50kg of sodium allyl sulfonate, 280kg of aqueous sodium hydroxide solution with a mass fraction of 40%, and 400kg of water.

[0042] The preparation method is as follows:

[0043] 1) Mix water, sodium hypophosphite and sodium allyl sulfonate, and then heat up to 80°C to obtain the first mixed solution;

[0044] 2) Add dropwise an aqueous solution of ammonium persulfate, acrylic acid and methacrylic acid with a mass percentage of 10% to the first mixed solution, and complete the dropwise addition within 3 hours, and then keep the temperature at 70° C. for 2 hours to obtain the second mixed solution liquid; the second mixed liquid was cooled to room temperature, and the pH value of the second mixed liquid was adjusted to 7 with a 40% aqueous sodium hydroxide...

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Abstract

The invention discloses a high-molecular copolymer dispersant for paint. The high-molecular copolymer dispersant is prepared by the following components in percentages by mass: 0.2-2% of an initiator, 0-2% of a chain transferring agent, 10-50% of a monomer A, 1-15% of a monomer B, 10-50% of a neutralizer, and 10-50% of water. Organic solvents are not added in a preparation process of the high-molecular copolymer dispersant, so recovery of the organic solvents is not needed, the technology is simple, the cost is low, and environment is not polluted. The paint is produced by utilization of the high-molecular copolymer dispersant, and the paint has the advantages of fast viscosity reduction speed for the powder and good viscosity reduction effects in the production process; water separation and agglomeration phenomenon of the paint does not disappear, an appropriate formula is used for preparing the paint, and after one year of storage, the water separation and agglomeration phenomenon does not disappear.

Description

technical field [0001] The invention relates to the field of chemicals, in particular to a polymer copolymer dispersant for coatings and a preparation method thereof. Background technique [0002] The coating industry is a pillar industry of the construction industry. In recent years, with the development of the national economy, especially the development of construction engineering and real estate industries, the demand for coatings has gradually increased. Pigment is the main raw material in paint, which can provide color for paint, increase the solid content of paint, reduce the cost of paint, and improve the performance of paint film. However, pigments generally exist in the form of aggregates of pigment particles, which need to be dispersed to a certain fineness to provide good tinting strength and hiding power. Therefore, dispersants are indispensable additives in paints. Polymer water-based coating dispersants are widely used in the production of water-based coating...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D7/12C08F220/06C08F222/06C08F228/02C08F220/28C08F212/14
CPCC08F220/06C09D7/65C08F220/281C08F212/14
Inventor 肖颖
Owner BEIJING MAYOR CHEM TECH
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