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Waterborne acrylic modified polyurethane emulsion as well as preparation method and application thereof

A water-based acrylic and polyurethane emulsion technology, which is applied in the field of polymer emulsion, can solve the problems of slow drying speed of paint film, poor chemical corrosion resistance, poor fullness of paint film, etc., to reduce the cost of emulsion, good weather resistance, and improve difficult emulsification Effect

Inactive Publication Date: 2015-05-06
GUANGDONG VALSPAR CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, water-based polyurethane coatings have become an important aspect of paint workers' research because their performance is the closest to traditional coatings. However, compared with traditional water-based polyurethane coatings, there are still problems such as slow drying speed of paint film, poor fullness of paint film, and water resistance. , solvent resistance, poor chemical corrosion resistance and other shortcomings

Method used

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  • Waterborne acrylic modified polyurethane emulsion as well as preparation method and application thereof
  • Waterborne acrylic modified polyurethane emulsion as well as preparation method and application thereof
  • Waterborne acrylic modified polyurethane emulsion as well as preparation method and application thereof

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preparation example Construction

[0040] The present invention also provides a kind of preparation method of waterborne acrylic acid modified polyurethane emulsion as described above, comprises the following steps:

[0041] a. Weigh an appropriate amount of toluene diisocyanate, 4,4' diphenylmethane diisocyanate, 2,4,6-collidine, 2,2-dimethylolpropionic acid, polyether polyol according to the above mass percentage Alcohol, cetyl alcohol, propylene glycol methyl ether acetate, n-butanol, and hydroxyl acrylic resin are put into the reaction kettle;

[0042] b. Heating the reactor in step a, the heating temperature is controlled at 70-75°C, stirring the contents in the reactor during the heating process to fully react the contents in the reactor, and detecting the NCO value during the reaction, Cool down to 30-50°C until NCO reaches the theoretical value;

[0043] NCO content refers to the mass fraction of NCO groups in the water-based acrylic modified polyurethane emulsion. The theoretical value can be calculat...

Embodiment 1

[0050] Equipped with 100Kg of water-based acrylic modified polyurethane emulsion 1 of the present invention, which is prepared by the following components by weight.

[0051] The preparation of water-based acrylic modified polyurethane emulsion 1 is as follows:

[0052]Put 24Kg of TDI, 11Kg of MDI, 3Kg of TMP, 6Kg of DMPA, 5Kg of polyether polyol, 3Kg of cetyl alcohol, 3Kg of PMA, 4Kg of n-butanol, and 24Kg of hydroxyacrylic resin into the reactor; then heat the reactor, The heating temperature is controlled at 70-75°C. During the heating process, the materials in the reactor are stirred to fully react the materials in the reactor to form a uniform solution. During the reaction, measure the NCO value while reacting until the NCO reaches the theoretical value. Cool down; then add T-120.2Kg, control the heating temperature at 65-70°C, stir the contents of the reactor during the heating process, so that the contents of the reactor can fully react to form a uniform solution until ...

Embodiment 2

[0054] Equipped with 100Kg of the water-based acrylic modified polyurethane emulsion 2 of the present invention, which is prepared by the following components by weight.

[0055] The preparation of water-based acrylic modified polyurethane emulsion 2 is as follows:

[0056] Put 22Kg of TDI, 12Kg of MDI, 5Kg of TMP, 4Kg of DMPA, 5Kg of polyether polyol, 3Kg of cetyl alcohol, 5Kg of PMA, 4Kg of n-butanol, and 22Kg of hydroxyacrylic resin into the reactor; then heat the reactor, The heating temperature is controlled at 70-75°C. During the heating process, the materials in the reactor are stirred to fully react the materials in the reactor to form a uniform solution. During the reaction, measure the NCO value while reacting until the NCO reaches the theoretical value. Cool down; then add T-120.2Kg, control the heating temperature at 65-70°C, stir the contents of the reactor during the heating process, so that the contents of the reactor can fully react to form a uniform solution u...

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Abstract

The invention discloses a waterborne acrylic modified polyurethane emulsion as well as a preparation method and application thereof. The waterborne acrylic modified polyurethane emulsion comprises the following components in percentage by weight: 10-30% of toluene diisocyanate, 5-20% of 4,4'-diphenyl methane diisocyanate, 1-10% of 2,4,6-trimethylpyridine, 1-10% of 2,2-dihydroxymethyl propionic acid, 1-10% of polyether polyol, 1-5% of hexadecanol, 1-10% of propylene glycol methyl ether acetate, 1-5% of n-butanol, 0-1% of dibutyl tin dilaurate, 1-10% of triethylamine, 1-10% of sodium dodecylbenzenesulfonate, 10-30% of hydroxyl acrylic resin and 1-15% of deionized water. Toluene diisocyanate and 4,4'-diphenyl methane diisocyanate are used so that the cost of the emulsion is greatly decreased; and meanwhile, hexadecanol is creatively used for modifying so that the problem that the generally synthesized polyurethane emulsion is difficult to emulsify is solved.

Description

technical field [0001] The invention relates to a polymer emulsion used for water-based coatings, more specifically, to a water-based acrylic modified polyurethane emulsion and its preparation method and application. Background technique [0002] As people pay more and more attention to health and environmental protection, especially in recent years, the smog weather in many areas of our country has become more and more frequent, protecting the environment on which we live has become our top priority. An important source of environmental pollution is the paint industry. Because traditional paint uses a large amount of volatile organic solvents (VOC), it not only pollutes the environment, but is also toxic to human health. In recent years, the environmental protection regulations of various countries have become more and more strict, and the emission of volatile organic compounds (VOC) in paints has been more and more strictly controlled. Some cities have banned the use of oi...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/66C08G18/62C08G18/48C08G18/34C09D175/08C09D7/12
CPCC08G18/7607C08G18/348C08G18/4063C08G18/48C08G18/6254C08G18/6692C08G18/7614C08G18/7671C09D7/20C09D7/47C09D7/63C09D175/08
Inventor 黄宏亭蔡森谢志超黎司华张海军
Owner GUANGDONG VALSPAR CHEM IND
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