Polyester aqueous dispersion for painting in automobile and preparation method thereof

A technology of dispersion and polyester, which is applied in the field of polyester water dispersion system, can solve the problems of low viscosity, low force, and low toughness of paint, and achieve the effect of large paint film thickness, sufficient toughness, and not easy to foam and crack

Inactive Publication Date: 2018-10-16
安徽江锐新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional water-based paints use emulsifiers to dissolve organic matter in water, and the organic matter and water molecules form large droplet particles, which are then connected by emulsifiers. This kind of paint has low viscosity and the force between organic matter and inorganic matter is small. The resulting skin is thin, low in toughness, and prone to peeling and cracking during use, so it is necessary to provide a new water-soluble coating

Method used

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  • Polyester aqueous dispersion for painting in automobile and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0021] The invention provides an aqueous polyester dispersion used as a paint for automobiles. The aqueous polyester dispersion consists of the following components in parts by weight: 5-10 parts of modified polyacrylic acid and 1-3 parts of water.

[0022] Wherein, as the preparation method of the polyester aqueous dispersion of paint in the automobile comprises the steps,

[0023] (1) Put tert-butyl acrylate, distilled water, sodium hydroxide and emulsifier into a four-necked flask, then respectively install a thermometer, a stirrer, and a reflux condenser in the four-necked flask, and keep one mouthful to stop it with a wooden stopper Feeding tube; the mass ratio of tert-butyl acrylate, distilled water, sodium hydroxide and emulsifier is 50:20:10:5;

[0024] (2) Turn on the stirrer and keep the mixed solution hydrolyzed and emulsified at room temperature for 1.5h;

[0025] (3) Add potassium persulfate to the emulsion in step (2), the mass ratio of potassium persulfate and ...

Embodiment 2

[0031] The invention provides an aqueous polyester dispersion used as a paint for automobiles. The aqueous polyester dispersion consists of the following components in parts by weight: 5-10 parts of modified polyacrylic acid and 1-3 parts of water.

[0032] Wherein, as the preparation method of the polyester aqueous dispersion of paint in the automobile comprises the steps,

[0033] (1) Put tert-butyl acrylate, distilled water, sodium hydroxide and emulsifier into a four-necked flask, then respectively install a thermometer, a stirrer, and a reflux condenser in the four-necked flask, and keep one mouthful to stop it with a wooden stopper Feeding tube; the mass ratio of tert-butyl acrylate, distilled water, sodium hydroxide and emulsifier is 60:30:15:8;

[0034] (2) Turn on the stirrer and keep the mixed solution hydrolyzed and emulsified at room temperature for 1.5h;

[0035] (3) Add potassium persulfate to the emulsion in step (2), the mass ratio of potassium persulfate and ...

Embodiment 3

[0041] The invention provides an aqueous polyester dispersion used as a paint for automobiles. The aqueous polyester dispersion consists of the following components in parts by weight: 5-10 parts of modified polyacrylic acid and 1-3 parts of water.

[0042] Wherein, as the preparation method of the polyester aqueous dispersion of paint in the automobile comprises the steps,

[0043] (1) Put tert-butyl acrylate, distilled water, sodium hydroxide and emulsifier into a four-necked flask, then respectively install a thermometer, a stirrer, and a reflux condenser in the four-necked flask, and keep one mouthful to stop it with a wooden stopper Feeding tube; the mass ratio of tert-butyl acrylate, distilled water, sodium hydroxide and emulsifier is 52:22:11:6;

[0044] (2) Turn on the stirrer and keep the mixed solution hydrolyzed and emulsified at room temperature for 1.5h;

[0045] (3) Add potassium persulfate to the emulsion in step (2), the mass ratio of potassium persulfate and ...

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PUM

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Abstract

The invention provides a polyester aqueous dispersion for painting in an automobile. The polyester aqueous dispersion is prepared from the following components in parts by weight: 5 to 10 parts modified polyacrylic acid and 1 to 3 parts of water. The polyester aqueous dispersion has the advantages that one alcohol hydroxyl group and carboxylic acid can be esterified by dihydric alcohol, the otheralcohol hydroxyl group can be mixed with one water molecule by hydrogen bonds, and a large amount of dihydric alcohols can be grafted onto the polyacrylic acid resin; the alcohol hydroxyl group is bonded with the water molecule, so that the water solubility of the macromolecules of the polyacrylic acid resin is improved; the modified polyacrylic acid resin and the water molecules can be mutually dissolved without an emulsifier; because the macromolecules of the polyacrylic acid resin and the water molecules are mutually dissolved, the concentration of the modified polyacrylic acid resin in theoil paint is high, and a large amount of water molecules which can be bonded with the alcohol hydroxyl group to form the hydrogen bonds are still contained after complete drying; the thickness of thepaint film is large, the toughness is enough, and the easiness in foaming and cracking is avoided.

Description

technical field [0001] The invention relates to a polyester water dispersion system, in particular to a polyester water dispersion used as a paint for automobiles and a preparation method thereof. Background technique [0002] Coatings are an integral part of car trim. The car is a confined space. In order to make the interior environment of the car healthier, people have developed water-based paints that do little harm to the human body. Traditional water-based paints use emulsifiers to dissolve organic matter in water, and the organic matter and water molecules form large droplet particles, which are then connected by emulsifiers. This kind of paint has low viscosity and the force between organic matter and inorganic matter is small. The resulting skin is thin, has low toughness, and is prone to peeling and cracking during use, so it is necessary to provide a new water-soluble coating. Contents of the invention [0003] Aiming at the deficiencies in the prior art, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F8/14C08F120/18C09D133/08
CPCC08F8/14C09D133/08C08F120/18
Inventor 江孝林狄成敏
Owner 安徽江锐新材料有限公司
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