Self-cleaned high-weather resistance aqueous acrylic polyurethane top coating and preparation method

An acrylic polyurethane, self-cleaning technology, applied in polyurea/polyurethane coatings, biocide-containing paints, antifouling/underwater coatings, etc., can solve the defects of clear image and antirust performance, insufficient weather resistance of water-based coatings, Susceptible to ultraviolet light and other problems, to achieve the effect of improving self-cleaning performance, good pigment compatibility, and good adhesion

Inactive Publication Date: 2017-09-15
HEBEI CHENYANG INDAL & TRADE GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, in the field of water-based coatings for modified cars in China, due to the influence of the environment in which the modified cars are used, such as wind, sun, rain, etc., their water-based coatings have always had insufficient weather resistance, and

Method used

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Examples

Experimental program
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preparation example Construction

[0036] The preparation method of the graphite-phase carbon nitride of the present invention is as follows: put urea or melamine into a crucible, place it in a muffle furnace, and calcinate for a certain period of time at a temperature of 500-700° C. to obtain the graphite-phase carbon nitride.

[0037] The best embodiment of the present invention is: by weight, component A includes: 25 parts of water dispersion a, 25 parts of water dispersion b, 17 parts of pigments and fillers, 15 parts of graphite phase carbon nitride, water-based polyaniline emulsion 15 parts, 2 parts of silicone leveling agent, 1 part of defoamer, 6 parts of film-forming aid, 1 part of neutralizing agent, 2.5 parts of dispersant, 3 parts of alkali-swellable thickener and 11 parts of deionized water ; In parts by weight, component B includes: 20 parts of aliphatic isocyanate and 8 parts of propylene carbonate.

[0038] The present invention also provides a method for preparing a self-cleaning high weather r...

Embodiment 1

[0045] The invention provides a self-cleaning highly weather-resistant waterborne acrylic polyurethane topcoat, the topcoat is a two-component waterborne acrylic polyurethane coating, comprising A component and B component;

[0046] In parts by weight, component A contains:

[0047]25 parts of water dispersion a, 25 parts of water dispersion b, 17 parts of pigment and filler, 15 parts of graphite phase carbon nitride, 15 parts of water-based polyaniline emulsion, 2 parts of silicone leveling agent, 1 part of defoamer, film forming 6 parts of auxiliary agent, 1 part of neutralizer, 2.5 parts of dispersant, 3 parts of alkali-swellable thickener and 11 parts of deionized water;

[0048] In parts by weight, component B contains:

[0049] 20 parts of aliphatic isocyanate, 8 parts of propylene carbonate.

[0050] The invention provides a self-cleaning highly weather-resistant water-based acrylic polyurethane topcoat. The preparation steps are as follows:

[0051] Step 1. Add the ...

Embodiment 2

[0055] The invention provides a self-cleaning highly weather-resistant waterborne acrylic polyurethane topcoat, the topcoat is a two-component waterborne acrylic polyurethane coating, comprising A component and B component;

[0056] In parts by weight, component A contains:

[0057] 23 parts of water dispersion a, 23 parts of water dispersion b, 17 parts of pigments and fillers, 13 parts of graphite phase carbon nitride, 13 parts of water-based polyaniline emulsion, 1.5 parts of silicone leveling agent, 1 part of defoamer, film-forming 5.5 parts of auxiliary agent, 1 part of neutralizing agent, 3 parts of dispersant, 3.5 parts of alkali-swellable thickener and 13 parts of deionized water;

[0058] In parts by weight, component B contains:

[0059] 11.2 parts of aliphatic isocyanate, 4.8 parts of propylene carbonate.

[0060] The invention provides a self-cleaning highly weather-resistant water-based acrylic polyurethane topcoat. The preparation steps are as follows:

[0061...

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Abstract

The invention discloses a self-cleaned high-weather resistance aqueous acrylic polyurethane top coating and a preparation method. The top coating is a double-component aqueous acrylic polyurethane coating which comprises a component A and a component B, wherein the component A comprises the following components in parts by weight: 40-60 parts of an aqueous hydroxyl acrylic dispersion, 10-20 parts of a pigment filler, 5-20 parts of graphite-phase carbon nitride, 10-20 parts of an aqueous polyaniline emulsion, 1-3 parts of an organic silicon leveling agent, 1-2 parts of a defoaming agent, 4-8 parts of filming aids, 1-2 parts of a neutralizer, 1-3 parts of a dispersing agent, 3-6 parts of an alkali dissolution type thickening agent and 5-13 parts of deionized water; the component B comprises 10-30 parts of aliphatic isocyanate and 4-10 parts of propylene carbonate. The self-cleaned high-weather resistance aqueous acrylic polyurethane top coating disclosed by the invention can be dried by self, can be also dried with heat at 80 DEG C and is rich in coating film, high in hardness and good in chemical resistance; due to introduction of the graphite-phase carbon nitride into the aqueous coating, the self cleaning property of the coating film can be improved, a great amount of labor and materials are saved, and meanwhile the wearing resistance and the thermal stability of the self-cleaned high-weather resistance aqueous acrylic polyurethane top coating are improved.

Description

technical field [0001] The invention relates to the technical field of water-based coatings, in particular to a self-cleaning highly weather-resistant water-based acrylic polyurethane topcoat and a preparation method thereof. Background technique [0002] In recent years, the problem of PM2.5 has become increasingly serious, the concentration of organic pollutants in the air has continued to increase, and the problem of environmental pollution has continued to be severe, making people pay more and more attention to environmental protection. The country has issued the latest policy, and "oil to water" is imminent. Water-based coatings not only need to meet the protection of the substrate, but also play a decorative role on the substrate. [0003] At present, in the field of water-based coatings for modified cars in China, due to the influence of the environment in which the modified cars are used, such as wind, sun, rain, etc., their water-based coatings have always had insuf...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D5/08C09D5/16C08G18/62
CPCC09D175/04C08G18/6216C08L2201/08C09D5/08C09D5/1618C09D5/18C08L79/02C08K3/28
Inventor 马利纳罗旭铮张淼赵宁宁张戈辉
Owner HEBEI CHENYANG INDAL & TRADE GROUP CO LTD
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