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Preparation method for acrylate finish-coat paint emulsion

A technology of acrylate and butyl acrylate, which is applied in the field of preparation of acrylate finish paint emulsion, can solve the problems of poor waterproof performance of finish paint, little improvement of surface gloss, and insufficient film density, etc., achieving excellent Water resistance, increased nucleation rate, and small product particle size

Inactive Publication Date: 2019-01-01
SHANGHAI APPLIED TECHNOLOGIES COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the large particle size and insufficient film density of the overcoat emulsion currently on the market, the waterproof performance of the overcoat paint is not good, and the surface gloss is not improved much.

Method used

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  • Preparation method for acrylate finish-coat paint emulsion
  • Preparation method for acrylate finish-coat paint emulsion
  • Preparation method for acrylate finish-coat paint emulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Add 3.1 parts of sodium lauryl sulfate and 100 parts of deionized water into a four-neck flask, stir evenly at a speed of 160 r / min, and raise the temperature to 82°C.

[0041] 10 parts of butyl acrylate, 4.2 parts of isooctyl acrylate, 33.2 parts of methyl methacrylate, 5.9 parts of butyl methacrylate, 1.7 parts of acrylic acid and 1.67 parts of isoamyl alcohol were mixed. The dropwise addition of the monomer / cosurfactant mixture was started, during which time 0.33 parts of ammonium persulfate was evenly added to the reaction system. Reduce the rotational speed to 140r / min, and control the dropping time at 2h.

[0042] After the dropwise addition, raise the temperature to 90°C, reduce the stirring speed to 100r / min and keep it warm for 50min to complete the reaction of the monomer, filter it with a filter cloth, and discharge the material to obtain an acrylic finish paint emulsion.

[0043] The resulting emulsion particle size test see figure 1 , indicating a particl...

Embodiment 2

[0045] Add 1.5 parts of sodium lauryl sulfate, 0.6 parts of sodium alkylphenol polyoxyethylene ether sulfate and 110 parts of deionized water into a four-necked flask, stir evenly at a speed of 160 r / min, and raise the temperature to 82 °C.

[0046] 12.4 parts of butyl acrylate, 3.5 parts of isooctyl acrylate, 30 parts of methyl methacrylate, 6.6 parts of butyl methacrylate, 1.55 parts of acrylic acid and 1.78 parts of n-amyl alcohol were mixed. The dropwise addition of the monomer / cosurfactant mixture was started, during which 0.29 parts of potassium persulfate was uniformly added to the reaction system. Reduce the rotational speed to 140r / min, and control the dropping time at 2.5h.

[0047] After the dropwise addition, raise the temperature to 90°C, reduce the stirring speed to 100r / min and keep it warm for 50min to complete the monomer reaction, filter with filter cloth, and discharge to obtain the acrylic finish paint emulsion.

[0048] The resulting emulsion particle siz...

Embodiment 3

[0050] Add 1.8 parts of sodium dodecyl sulfate, 0.7 parts of sodium dodecylbenzenesulfonate and 90 parts of deionized water into a four-neck flask, stir evenly at a high speed of 160 r / min, and raise the temperature to 82°C.

[0051]13.4 parts of butyl acrylate, 3 parts of isooctyl acrylate, 33 parts of methyl methacrylate, 4.9 parts of butyl methacrylate, 1.34 parts of acrylic acid were mixed with 0.86 parts of isoamyl alcohol, 0.86 parts of n-amyl alcohol. The dropwise addition of the monomer / cosurfactant mixture was started, during which time 0.27 parts of ammonium persulfate was evenly added to the reaction system. Reduce the rotational speed to 140r / min, and control the dropping time at 2.5h.

[0052] After the dropwise addition, raise the temperature to 90°C, reduce the stirring speed to 100r / min and keep it warm for 50min to complete the monomer reaction, filter with a filter cloth, and discharge to obtain the acrylic finish paint emulsion.

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Abstract

The invention provides an acrylate finish-coat paint emulsion. The acrylate finish-coat paint emulsion is composed of butyl acrylate, isooctyl acrylate, methyl methacrylate, butyl methacrylate, acrylic acid, an emulsifier, a co-surfactant, an initiator and water. The invention provides a preparation method for the acrylate finish-coat paint emulsion. According to the invention, a differential nucleation emulsion polymerization method is adopted, and all the emulsifier and water are put into a reaction container to prepare an aqueous emulsifier micelle solution; then a mixture of monomers and the co-surfactant is slowly added into the aqueous emulsifier micelle solution drop by drop, and variable stirring speeds are cooperatively employed, so through cooperative usage of the co-surfactant and the emulsifier, the maximum ratio of nucleation of emulsifier micelles is obtained, the effect of high monomer distribution degree and considerable emulsion particles are obtained, and the producedemulsion has a small particle diameter. The prepared emulsion has a particle diameter of 20 to 50 nm and a solid content of no less than 30%, and shows good water resistance and gloss when applied tothe top facing of waterborne real stone paint, texture paint, fireproof paint and the like.

Description

technical field [0001] The invention belongs to the field of chemical industry, and relates to a preparation method of a synthetic emulsion, in particular to a preparation method of an acrylate finish paint emulsion. Background technique [0002] In recent years, with the increasing call for environmental protection, various industries have begun to develop in the direction of green environmental protection. Especially in the paint industry, traditional solvent-based emulsions have gradually withdrawn from the stage of history due to problems such as strong odor, high toxicity, and serious pollution during production. Water-based emulsion has been developed rapidly because of its low VOC, solvent is water, and non-toxic. However, there is still a gap between the performance of water-based emulsions and solvent-based emulsions, especially in the building exterior wall emulsions. Water-based coatings such as real stone paint, texture paint, and flame-retardant paint generally...

Claims

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Application Information

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IPC IPC(8): C08F220/14C08F220/18C08F220/06C09D133/12
CPCC08F220/14C09D133/12C08F220/1804C08F220/1808C08F220/06
Inventor 吴蓁王一鸣姜琴李德全张英强
Owner SHANGHAI APPLIED TECHNOLOGIES COLLEGE
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