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Water-borne polyurethane matte finishing paint for locomotive interior and exterior decorations

A water-based, polyurethane technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of limit film thickness and air bubbles, affect popularization and application, and high raw material prices, so as to reduce product toxicity, excellent water resistance of coatings, Excellent anti-aging effect

Inactive Publication Date: 2018-06-22
株洲市九华新材料涂装实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, Bayer, BASF and other two-component water-based polyurethane industrial paints have been studied for many years, but they are only used in small areas and areas. Because of their high raw material prices, ranging from about 150-300 yuan / kg, they have affected the market. The promotion and use of
In addition, in the process of larger workpieces and large-area construction, there are some incompatibility due to the relationship between the climate environment and construction, and various paint film problems are prone to occur. Technical Difficulties

Method used

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  • Water-borne polyurethane matte finishing paint for locomotive interior and exterior decorations
  • Water-borne polyurethane matte finishing paint for locomotive interior and exterior decorations
  • Water-borne polyurethane matte finishing paint for locomotive interior and exterior decorations

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0177] Two, the preparation method of described locomotive interior and exterior decoration water-based polyurethane matte topcoat comprises the following steps:

[0178] (1), the preparation of described waterborne hydroxyacrylic resin:

[0179] Will

[0180] The water-based hydroxyacrylic acid main resin and the water-based hydroxyacrylic acid auxiliary resin can be mixed uniformly according to the mass ratio main resin: auxiliary resin=53:7;

[0181] (2), the preparation of semi-finished paint paste in the described finish paint:

[0182] ①. Preparation of pigment paste:

[0183] Prepare materials according to the pigment paste formula, then pour part of the deionized water and wetting agent into the tank in turn, stir at a low speed of 400 rpm for 3-5 minutes, then add the pigment in the above ratio while stirring, 600-800 rpm Stir at high speed for 10 minutes; then add DPM, anti-sedimentation agent, amine neutralizer, and defoamer in sequence under low-speed stirring, ...

example 1

[0205] Example 1, NCS S0505-Y50R beige water-based polyurethane matte finish

[0206] (1) The parts by weight of the raw materials that make up the topcoat are:

[0207] Ⅰ. Semi-finished paint paste:

[0208] A. Dispersion and grinding

[0209] 42.88 parts of water-based hydroxyacrylic acid main resin 5.66 parts of water-based hydroxyacrylic acid auxiliary resin

[0210] Pigment paste 35.02 parts Amine neutralizer 0.081 parts

[0211] Matte powder 4.05 parts Wetting agent 1.214 parts

[0212] 0.243 parts of anti-settling agent 0.405 parts of defoamer

[0213] Subtotal: 89.55 copies

[0214] Among them, 35.02 parts of pigment paste = 34.53 parts of titanium white paste + 0.0507 parts of iron red paste + 0.437 parts of iron yellow paste + 0.0046 parts of black paste

[0215] B. Letting down

[0216]

[0217] Ⅱ. Fine-tuning the color difference and gloss of the topcoat:

[0218] Semi-finished paint paste 93.81 parts

[0219] Black pulp 0.0012 parts (according to RAL c...

example 2

[0226] Example 2, RAL7047 ice gray water-based polyurethane matte finish

[0227] (1) The parts by weight of each raw material forming the finish paint are:

[0228] Ⅰ. Semi-finished paint paste:

[0229] A. Dispersion and grinding

[0230]

[0231] Among them, 30.33 parts of pigment paste = 30 parts of titanium white paste + 0.0307 parts of iron red paste + 0.147 parts of iron yellow paste + 0.153 parts of black paste

[0232] B. Letting down

[0233] BCS 2.41 DGBE 5.48

[0234] Leveling agent 0.263 parts Amine neutralizer 0.22 parts

[0235] Substrate wetting agent 0.35 parts Anti-aging additive 1.21 parts

[0236] Thickener 1 1.05 parts Thickener 2 0.35 parts

[0237] Ⅱ. Fine-tuning the color difference and gloss of the topcoat:

[0238] Semi-finished paint paste 93.09 parts

[0239] Black pulp 0.02 parts (according to RAL color card and user negotiation color difference requirements)

[0240] Varnish 6.89 parts (gloss 40-60%, 60° angle gloss meter)

[0241] Th...

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Abstract

The invention relates to water-borne polyurethane matte finishing paint for locomotive interior and exterior decorations and preparation method. The water-borne polyurethane matte finishing paint comprises two parts, namely finishing coat and a curing agent, wherein the finishing coat comprises a water-borne acrylic resin, a pigment paste, a filler, a cosolvent, an auxiliary agent and deionized water; the curing agent comprises water-borne HDI isocyanate and a small amount of an organic solvent. The water-borne polyurethane matte finishing paint is sprayed through wet-on-wet two-pass spraying,is baked and cured to form a film. The water-borne polyurethane matte finishing paint can fully meet design requirements of railway customers, is stable in color and luster control, does not containheavy metals such as chromium and lead, and reduces the environment pollution; the water-borne polyurethane matte finishing paint can provide coating with excellent aging resistance and water resistance and good mechanical properties and chemical properties, and can provide a comfortable and smooth hand feel; the water-borne polyurethane matte finishing paint is easy to construct, uses water as adiluent, is environment-friendly, has low VOC emission, and reduces harm to the environment and human health. The water-borne polyurethane matte finishing paint is mainly applied to surface coating ofrailway locomotives, urban rail transit vehicle bodies, interior decorations, chassises, frameworks and various accessories.

Description

technical field [0001] The invention relates to a water-based polyurethane matt finish paint for interior and exterior decoration of a locomotive and a preparation method thereof. The topcoat is mainly used for the surface coating of railway locomotives, urban rail transit vehicle bodies, interiors, underframes, frames and various accessories. Background technique [0002] The types of water-based paints produced in my country are water-based amino baking varnishes, water-based one-component self-drying paints, and water-based two-component PU topcoats, which are mainly used for plastics, metals, glass, wood, composite materials, automotive repairs, and mechanical equipment coatings. . Water-based amino baking varnish, water-based one-component self-drying paint and other properties are relatively stable, and have been industrialized production and application. The production level of water-based two-component PU topcoat is uneven, with different quality and performance. The...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D7/20C09D7/44C09D7/41C09D7/61C08G18/73C08G18/62
Inventor 邱景生陈磊郑天扬
Owner 株洲市九华新材料涂装实业有限公司
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