Sealing acrylic emulsion

A technology of acrylic acid and acrylate, which is applied in the field of acrylate copolymer emulsion, can solve the problems of coating pan-alkali, pan-salt, and insufficient adhesion, and achieve the effect of highlighting the permeability

Inactive Publication Date: 2004-07-07
江苏日出化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Acrylic copolymer emulsions are mainly used for interior and exterior wall architectural latex coatings. At present, the widely used acrylate copolymer emulsions in China usually use methacrylic acid monomers as functional monomers to enhance adhesion, so the adhesion is not good enough. , the defect of relatively poor alkali resistance
And the emulsifiers used are common sodium lauryl sulfate and nonylphenol polyoxyethylene ether, so the particle size of the emulsion is not fine enough (about 0.1-1 μm), resulting in poor permeability of the latex paint to the cement mortar layer. Cannot effectively seal the alkali-salt channel in cement mortar
Therefore, in the past construction of exterior wall latex coatings, pan-alkaline and pan-salt phenomena often occurred in the coating, and some of them caused coating failures.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0007] Example 1: The formula consists of: styrene 8 (weight percent, the same below), acrylate 20, (meth)acrylic acid 0.7, acrylic acid sulfonic acid 0.2, (meth)glycidyl acrylate 0.4, sulfosuccinic acid Surfactant mixture 0.5, nonylphenol polyoxyethylene ether 0.3, dodecylbenzenesulfonic acid 0.05, potassium persulfate 0.35, water 69.5.

example 2

[0008] Example two: the formula consists of: styrene 9, acrylate 19, (meth)acrylic acid 0.8, acrylic acid sulfonic acid 0.3, (meth)glycidyl acrylate 0.6, sulfosuccinic acid surfactant mixture 0.4, nonyl Base phenol polyoxyethylene ether 0.5, dodecylbenzenesulfonic acid 0.1, potassium persulfate 0.3, water 69.

[0009] Take formula amount styrene, acrylate, (meth)acrylic acid, (meth)glycidyl acrylate and 1 / 2 sulfosuccinic acid surfactant mixture in example one and example two, nonylphenol polyoxyethylene Ether, dodecylbenzenesulfonic acid and 30% water are stirred and mixed to form an emulsion, which is component A, and potassium persulfate in the above formula is mixed with 20% water to form a solution, which is component B, and then the remaining 50% water and Heat the mixture solution of 1 / 2 sulfosuccinic acid surfactant mixture and the formulated amount of acrylic acid sulfonic acid and keep it at 80-85°C, then add components A and B respectively at a uniform speed, finish ...

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PUM

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Abstract

A sealing acrylic emulsion, which is used for cement mortar to close the diffusion channels of alkali and salt, is disclosed. It features that the epoxypropyl (methyl) acrylate containing epoxy group is used to modify the emulsion polymer for improving its adhesion and alkali resistance, the mixture of sulfobutanedioic acid surfactant and the polyoxyethylenated nonylphenol are used as emulsifier, and the alkylphenylsulfonic acid is used to regulate pH value to make emulsion become microparticle structure. It can be used for cement mortar and paint of external wall.

Description

technical field [0001] The invention relates to an acrylic ester copolymer emulsion modified by an ethylenic functional monomer. Background technique [0002] Acrylic copolymer emulsions are mainly used for interior and exterior wall architectural latex coatings. At present, the widely used acrylate copolymer emulsions in China usually use methacrylic acid monomers as functional monomers to enhance adhesion, so the adhesion is not good enough. , the defect of relatively poor alkali resistance. And the emulsifiers used are common sodium lauryl sulfate and nonylphenol polyoxyethylene ether, so the particle size of the emulsion is not fine enough (about 0.1-1 μm), resulting in poor permeability of the latex paint to the cement mortar layer. The alkali-salt channel in cement mortar cannot be effectively closed. Therefore, in the past construction of exterior wall latex coatings, pan-alkaline and pan-salt phenomena often occurred in the coating, and some of them caused coating ...

Claims

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Application Information

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IPC IPC(8): C08F2/22C08F220/18
Inventor 李文甲肖雪平
Owner 江苏日出化工有限公司
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