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Fluorine-silicon modified self-crosslinking acrylic ester emulsion and preparation thereof

A technology of acrylate and fluorosilicon modification, which is applied in the coating and other directions, can solve problems such as the content of organic silicon should not be too high, the stability of the emulsion will decrease, and the effect of modification will be affected, so as to achieve good stability of the emulsion, simple preparation process, The effect of easy control of reaction conditions

Inactive Publication Date: 2009-01-21
PEKING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the content of organic silicon in the silicone acrylic emulsion should not be too high, otherwise it will cause a decline in the stability of the emulsion, which will have a certain impact on the modification effect.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Add 120 parts of deionized water, 1.8 parts of alkylphenol polyoxyethylene ether ammonium sulfate (58% content, the same below), 0.4 part of alkylphenol polyoxyethylene ether, and 0.4 part of sodium bicarbonate into the reaction kettle, heat Stir to fully dissolve. The temperature was maintained at 75±2°C.

[0044] Dissolve 35 parts of deionized water, 0.6 parts of alkylphenol polyoxyethylene ether ammonium sulfate, and 0.12 parts of potassium persulfate into the pre-milk kettle, slowly add monomers: 41 parts of methyl methacrylate, 30 parts of isooctyl methacrylate 1.5 parts of acrylic acid, 1 part of 1,4-butanediol diacrylate, and vigorously stirred for 30 minutes to obtain a nuclear pre-emulsion. Slowly drop this nuclear pre-emulsion into the reactor for 2-4 hours at a temperature of 75±2°C , keep warm for 1 hour after the dropwise addition is completed.

[0045] Dissolve 35 parts of deionized water, 0.6 parts of alkylphenol polyoxyethylene ether ammonium sulfate, ...

Embodiment 2

[0048] Add 120 parts of deionized water, 1 part of alkylphenol polyoxyethylene ether ammonium sulfate (58% content, the same below), 0.18 part of alkylphenol polyoxyethylene ether, and 0.4 part of sodium bicarbonate into the reactor, and heat Stir to fully dissolve. The temperature was maintained at 80±2°C.

[0049]Dissolve 35 parts of deionized water, 0.6 parts of alkylphenol polyoxyethylene ether ammonium sulfate, and 0.12 parts of ammonium persulfate into the pre-milk kettle, slowly add monomers: 50 parts of methyl methacrylate, 23 parts of isooctyl methacrylate 2 parts, 2 parts of acrylic acid, 1 part of 1,4-butanediol diacrylate, and vigorously stirred for 30 minutes to obtain a nuclear pre-emulsion. Slowly drop this nuclear pre-emulsion into the reactor for 2-4 hours at a temperature of 80±2°C , keep warm for 1 hour after the dropwise addition is completed.

[0050] Dissolve 35 parts of deionized water, 0.56 parts of alkylphenol polyoxyethylene ether ammonium sulfate, ...

Embodiment 3

[0053] Add 120 parts of deionized water, 1.4 parts of alkylphenol polyoxyethylene ether ammonium sulfate (58% content, the same below), 0.2 part of alkylphenol polyoxyethylene ether, and 0.4 part of sodium bicarbonate into the reaction kettle, heat Stir to fully dissolve. The temperature was maintained at 85±2°C.

[0054] Dissolve 35 parts of deionized water, 0.6 parts of alkylphenol polyoxyethylene ether ammonium sulfate, and 0.12 parts of ammonium persulfate into the pre-milk kettle, slowly add monomers: 41 parts of methyl methacrylate, 30 parts of isooctyl methacrylate 1.5 parts of acrylic acid, 0.8 parts of ethylene glycol diacrylate, and vigorously stirred for 30 minutes to obtain a nuclear pre-emulsion. Slowly add the nuclear pre-emulsion to the reactor for 2-4 hours at a temperature of 85±2°C. Then keep warm for 1 hour.

[0055] Dissolve 35 parts of deionized water, 0.56 parts of alkylphenol polyoxyethylene ether ammonium sulfate, 0.28 parts of fluorine-containing emu...

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Abstract

The invention provides a fluorine-silicon modified self-crosslinking acrylic ester emulsion and a preparation method thereof, belonging to the technical field of polymer synthesis. The emulsion is a product formed by organosilicon monomers, fluoride-containing acrylic monomers, (methyl) acrylic monomers and self-crosslinking monomers through core-shell emulsion polymerization. The preparation method adopts a core-shell emulsion polymerization method, thereby ensuring that the fluoride-containing acrylic monomers tend to surface polymerization, and fluorine atoms tend to polymer surface in emulsion film forming process; moreover, the monomers capable of self-crosslinking is added to a shell layer, so as to utilize the crosslinking of the monomers to fixedly limit the migration of the fluorine atoms towards the inside of latex particles, as well as the swing of chains, thereby ensuring that the performances of the fluoride-containing emulsion are completely embodied. The preparation method improves the water resistance, stain resistance, solvent resistance, weather resistance and other comprehensive performances of the emulsion. The fluorine-silicon modified self-crosslinking acrylic ester emulsion prepared through the preparation method can be widely applied to high-grade building paint, industrial paint and wooden ware varnish. Moreover, the preparation method has the characteristics of simple manufacturing process, easy reaction condition control, good emulsion stability and environment-friendly property.

Description

technical field [0001] The invention relates to a fluorine-silicon modified self-crosslinking acrylate emulsion and a preparation method thereof, belonging to the technical field of polymer synthesis. This fluorine-silicon modified self-crosslinking acrylate emulsion is mainly used in high-grade building exterior wall coatings, industrial coatings, wood coatings, varnishes and other fields. Background technique [0002] With the strengthening of people's awareness of environmental protection, environmentally friendly water-based latex paint has been widely used in interior and exterior wall buildings. However, with the rise of high-end buildings, people have higher and higher performance requirements for latex paint. It should not only have little environmental pollution, but also have excellent weather resistance, cold resistance, water resistance, stain resistance, and color retention. Now on the market, mainly styrene acrylic emulsion, pure acrylic emulsion and silicone...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/02C08L33/06C08L35/02C08K5/25C08F220/06C08F220/12C08F222/14C08F230/08C08F220/22C08F220/58C08F220/28C08F2/24C09D133/02C09D133/06C09D135/02
Inventor 李明谦彭新生刘小玲
Owner PEKING UNIV
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