Water-based paint dispersing method

A water-based paint and dispersion technology, applied in coatings, polyurea/polyurethane coatings, etc., can solve the problems of turbidity and fogging of the coating film and the reduction of physical and chemical properties of the paint film, and achieve a simple preparation method, good hand feeling, and good transparency. Effect

Inactive Publication Date: 2018-04-20
舟山市奥力士制漆有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Water-based paint is a paint prepared with water as the dispersion medium. It has the advantages of low toxicity, non-flammability, no pollution to the environment, energy saving, and safety. It also has the performance of solvent-based polyurethane paint. When it is applied to special materials such as leather and packaging, It is often required that the coating film has matte performance. It is generally popular in the market to add matte powder to the coating to extinguish the matte. However, after the matte powder is added, the physical and chemical properties of the paint film will be greatly reduced. Therefore, foreign countries are actively seeking a self-matting At present, the matt resin achieves extinction through the difference in compatibility or particle size. Usually, some silicon groups or acrylate macromolecular groups are introduced into the resin structure. This method can effectively extinction but will cause coating Membrane cloudiness

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] In a sealed container with nitrogen protection, under stirring, 74.8 grams of isophorone diisocyanate was added dropwise to 51.3 grams of hydroxystyrene butadiene rubber, and stirred for 1.5 hours. After completion, the temperature was raised to 80 ° C, and 41.5 gram of dimethylolpropionic acid and 128.7 grams of polyether polyol (Mn about 1500), stirred for about 4 hours, lowered the temperature of the system to about 50°C, added 8.7 grams of triethylamine for neutralization reaction, and stirred for 0.5 After 1 hour, add about 580 grams of deionized water, increase the stirring rate to 800 rpm, and perform shear dispersion. Before the NCO is reduced to 2.1wt%, add 3.7 grams of ethylenediamine diluted with water to carry out the chain extension reaction After stirring for about 2 hours, a water-based paint dispersion with a solid content of about 34% was obtained.

[0018] Take 100 grams of polyurethane dispersion, add 2 grams of trimethylolpropane-tris[3-(2-methylazir...

Embodiment 2

[0022] In a sealed container with nitrogen protection, under stirring, 51.6 grams of isophorone diisocyanate was added dropwise to 50.4 grams of hydroxystyrene-butadiene rubber, and stirred for 1.5 hours. After completion, the temperature was raised to 80 ° C, and 42.6 gram of dimethylolpropionic acid and 125.8 grams of polyether polyol (Mn about 1500), stirred for about 4 hours, lowered the system temperature to about 50°C, added 7.9 grams of triethylamine for neutralization reaction, stirred for 0.5 After 1 hour, add about 540 grams of deionized water, increase the stirring speed to 800 rpm, and carry out shear dispersion. Before the NCO is reduced to 1.3wt%, add 3.0 grams of ethylenediamine diluted with water to carry out the chain extension reaction After stirring for about 2 hours, a water-based paint dispersion with a solid content of about 34% was obtained.

[0023] Take 100 grams of polyurethane dispersion, add 2 grams of trimethylolpropane-tris[3-(2-methylaziridinyl)]...

Embodiment 3

[0025] In a sealed container with nitrogen protection, under stirring, 87.1 grams of isophorone diisocyanate was added dropwise to 38.2 grams of hydroxystyrene butadiene rubber, and stirred for 1.5 hours. After completion, the temperature was raised to 80 ° C, and 58.2 gram of dimethylolpropionic acid and 147.5 grams of polyether polyol (Mn about 1500), stirred for about 4 hours, lowered the temperature of the system to about 50°C, added 9.2 grams of triethylamine for neutralization reaction, and stirred for 0.5 After 1 hour, add about 620 grams of deionized water, increase the stirring speed to 800 rpm, and perform shear dispersion. Before the NCO is reduced to 2.7wt%, add 3.7 grams of ethylenediamine diluted with water to carry out the chain extension reaction After stirring for about 2 hours, a water-based paint dispersion with a solid content of about 34% was obtained.

[0026] Take 100 grams of polyurethane dispersion, add 2 grams of CX-100 (trimethylolpropane-tris[3-(2-m...

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Abstract

The invention discloses a water-based paint dispersing method. The water-based paint dispersing method comprises following steps: under protection of an inert gas, isocyanate monomer is added into hydroxy styrene-butadiene rubber with stirring, reaction is carried out for 0.5 to 2h, the temperature is increased to 70 to 90 DEG C, dimethylolpropionic acid and polyether polyol are added, reaction iscarried out for 3 to 5h, the temperature is reduced to 40 to 60 DEG C, triethylamine is added for neutralization, reaction is carried out for 0.1 to 2h, deionized water is added, shearing dispersionis carried out at a rotating speed of 700 to 900r/min, ethene diamine is added for chain extension, and reaction is carried out for 1 to 3h so as to obtain a water-based paint dispersoid. Butyl rubbersegments are introduced into the water-based paint dispersoid, so that microphase separation of molecular chains is achieved, intramolecular extinction is achieved, and the obtained product possessesself matt performance. The water-based paint dispersoid is prepared into a paint, the transparency and hand feeling are excellent.

Description

technical field [0001] The invention belongs to the technical field of polymer material polyurethane, and in particular relates to a preparation method of a water-based paint dispersion and an application of the water-based paint dispersion. Background technique [0002] Water-based paint is a paint prepared with water as the dispersion medium. It has the advantages of low toxicity, non-flammability, no pollution to the environment, energy saving, and safety. It also has the performance of solvent-based polyurethane paint. When it is applied to special materials such as leather and packaging, It is often required that the coating film has matte performance. It is generally popular in the market to add matte powder to the coating to extinguish the matte. However, after the matte powder is added, the physical and chemical properties of the paint film will be greatly reduced. Therefore, foreign countries are actively seeking a self-matting At present, the matt resin achieves ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/14C08G18/75C08G18/69C08G18/66C08G18/34C08G18/48C08J7/04C08L55/02
CPCC08G18/348C08G18/48C08G18/6576C08G18/6692C08G18/698C08G18/755C08J7/0427C08J2355/02C08J2475/14C09D175/14
Inventor 王华峰
Owner 舟山市奥力士制漆有限公司
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