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Multicolor low-gloss water-based acrylic polyurethane finish paint for passenger train and preparation method of multicolor low-gloss water-based acrylic polyurethane finish paint

A technology of acrylic polyurethane and water-based acrylic, which is applied in the direction of polyurea/polyurethane coatings, multi-color effect coatings, coatings, etc. It can solve the problems of poor gloss stability of the paint film, reduce the gloss of the topcoat, and have no cost advantage. The effect of reducing the content of volatile organic compounds, stabilizing the gloss of the paint film, and eliminating potential safety hazards

Active Publication Date: 2021-07-09
SHANXI HUABAO NEW MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The usual method is to choose a water-based acrylic resin with a high hydroxyl value, and add a large amount of matting powder to reduce the gloss of the top coat. However, the disadvantage of this method is that the gloss stability of the paint film is not good, and the gloss of the original design may be lost. Risk, on the other hand, matting powder is more expensive, no cost advantage

Method used

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  • Multicolor low-gloss water-based acrylic polyurethane finish paint for passenger train and preparation method of multicolor low-gloss water-based acrylic polyurethane finish paint
  • Multicolor low-gloss water-based acrylic polyurethane finish paint for passenger train and preparation method of multicolor low-gloss water-based acrylic polyurethane finish paint
  • Multicolor low-gloss water-based acrylic polyurethane finish paint for passenger train and preparation method of multicolor low-gloss water-based acrylic polyurethane finish paint

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Experimental program
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preparation example Construction

[0032] The invention provides the preparation method of above-mentioned multi-color low-gloss water-based acrylic polyurethane topcoat for railway passenger cars, comprising the following steps:

[0033] The first step is to prepare component A: weigh each component according to the formula amount, first mix 4 / 5 of deionized water, 1 / 5 of hydroxyl-containing water-based acrylic resin, 1 / 2 of defoamer, dispersant, Wetting agent is added under stirring at 300-400r / min, after adding, stir for 10-15min to mix evenly, slowly add rheological additive, increase the speed to 600-800r / min and stir for 15-20min, then add various pigments , 800-1000r / min high-speed dispersion and stirring for 20-30min to obtain a pre-dispersed slurry; the upper sand mill grinds the pre-dispersed slurry to a fineness of less than 15 μm to obtain a finely ground slurry; grind the finely ground slurry at 600-800r / min Add 4 / 5 of hydroxyl-containing water-based acrylic resin, self-dulling water-based polyuret...

Embodiment 1--4

[0037] Embodiment 1-4 takes the raw material according to the proportioning amount in the following table 1, according to the processing parameters of the preparation method in the real table 2 and the preparation method to process the multi-color low gloss water-based acrylic polyurethane topcoat product for railway passenger cars, specifically see table 1 and Table 2.

[0038] Table 1: Raw material ratio table of embodiment 1-4

[0039]

[0040]

[0041] Table 2: Embodiment 1-4 process parameter table

[0042]

[0043]

[0044] The process parameters involved in Table 2 respectively correspond to the process parameters involved in the first step of the preparation process in sequence. Among them, "adding the first batch of materials" and "adding the second batch of materials" respectively correspond to the process of adding multiple raw materials in the first step.

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Abstract

The invention discloses a multicolor low-gloss water-based acrylic polyurethane finish paint for a passenger train and a preparation method of the multicolor low-gloss water-based acrylic polyurethane finish paint. The finish paint comprises a component A and a component B, wherein the component A includes 55 to 60 parts of hydroxyl-containing water-based acrylic resin, 5 to 15 parts of self-extinction water-based polyurethane resin, 0.1 to 0.3 part of a dispersing agent, 2.0 to 3.0 parts of a wetting agent, 0.1 to 0.3 part of a defoaming agent, 5 to 12 parts of a pigment, 0.1 to 10 parts of water-based organic color paste, 0.1 to 0.3 part of a rheological additive, 0.2 to 0.4 part of a flatting agent, 0.2 to 0.3 part of a thickening agent, 0 to 3 parts of extinction powder, 4 to 8 parts of a cosolvent and the balance of deionized water; and the component B comprises the following components in parts by weight: 75-80 parts of water dispersible polyisocyanate and 20-25 parts of a solvent. The paint film is stable in gloss and long in maintenance time, and meets the requirement for the gloss of the outer surface of a power concentration Fuxing bullet train unit with the speed of 160km per hour; and water is used as a diluent, so that the content of volatile organic compounds is greatly reduced.

Description

technical field [0001] The invention relates to a multi-color low-gloss water-based acrylic polyurethane topcoat for railway passenger cars and a preparation method thereof, belonging to the technical field of water-based coatings. Background technique [0002] In recent years, the state has vigorously advocated and promoted the use of environmentally friendly products. CRRC Group proposed to apply water-based coatings to the surface of trucks, locomotives and bullet trains step by step. Under the background of the green transformation strategy, water-based coatings The use of coatings on railway passenger cars and locomotives is increasing year by year. The 160km / h concentrated power Fuxing EMU developed by a company affiliated to CRRC puts forward specific requirements for the protection and decoration of the topcoat on the outer surface. Water resistance, resistance to artificial climate acceleration test and other resistance indicators, mechanical properties and hardnes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D7/20C09D7/61C09D5/29C09D5/08
CPCC09D175/04C09D7/20C09D7/61C09D5/29C09D5/08C08K2003/2241C08K3/22C08K3/04
Inventor 韩连山孙锋郭泽方田计青
Owner SHANXI HUABAO NEW MATERIALS CO LTD
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