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Polishing-free water-based intermediate coating for rail transit and preparation method thereof

A technology for rail transit and coatings, applied in polyurea/polyurethane coatings, coatings, etc., can solve problems such as poor adhesion, reduce waste, improve production efficiency, and maintain service life.

Inactive Publication Date: 2020-11-03
山东七维新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the technical problem of poor adhesion between the existing intermediate coating and the top coat and the need for polishing, the invention provides a non-grinding water-based intermediate coating for rail transit and a preparation method thereof. The surface dyne value of the intermediate coating is low, Good intercoat adhesion with topcoat, no need for sanding

Method used

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  • Polishing-free water-based intermediate coating for rail transit and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A non-grinding water-based intermediate coating for rail transit, the coating includes component A and component B, the weight ratio of component A and component B is 4:1, and the component A includes waterborne polyurethane resin 20 parts, 15 parts of hydroxyacrylic acid dispersion, 0.3 parts of non-silicon high polymer defoamer, 5 parts of pigment, 5 parts of filler, 3 parts of coalescent, 0.2 part of anti-settling agent, 0.2 part of thickener, deionized 5 parts of water, of which,

[0031] The waterborne polyurethane resin is Covestro 2457 resin,

[0032] The hydroxyacrylic acid dispersion is Wanhua 2042N,

[0033] The non-silicon high polymer defoamer is BYK011,

[0034] The pigment is an inorganic pigment,

[0035] The filler is barium sulfate,

[0036] The film-forming aid is ethylene glycol butyl ether,

[0037] The anti-settling agent is bentonite anti-settling agent,

[0038] The thickener is a polyurethane associative thickener;

[0039] In the componen...

Embodiment 2

[0046] A non-grinding water-based intermediate coating for rail transit, the coating includes component A and component B, the weight ratio of component A and component B is 4:1, and the component A includes waterborne polyurethane resin 40 parts, 25 parts of hydroxyacrylic acid dispersion, 0.5 parts of amine neutralizer, 0.8 parts of non-silicon high polymer defoamer, 20 parts of pigment, 40 parts of filler, 10 parts of coalescent, 1 part of anti-settling agent, 1 part of thickener, 20 parts of deionized water, wherein,

[0047] The waterborne polyurethane resin is Covestro 2457 resin,

[0048]The hydroxyacrylic acid dispersion is Wanhua 2042N,

[0049] The non-silicon high polymer defoamer is BYK012,

[0050] The pigment is an organic pigment,

[0051] The filler is talcum powder,

[0052] The film-forming aid is diethylene glycol methyl ether,

[0053] The anti-settling agent is bentonite anti-settling agent,

[0054] The thickener is a polyurethane associative thicke...

Embodiment 3

[0062] A non-grinding water-based intermediate coating for rail transit, the coating includes component A and component B, the weight ratio of component A and component B is 4:1, and the component A includes waterborne polyurethane resin 28 parts, 22 parts of hydroxyacrylic acid dispersion, 0.3 parts of amine neutralizer, 0.5 parts of non-silicon high polymer defoamer, 10 parts of pigment, 20 parts of filler, 8 parts of coalescence aid, 0.5 part of anti-settling agent, 0.5 parts of thickener, 15 parts of deionized water, wherein,

[0063] The waterborne polyurethane resin is Covestro 2457 resin,

[0064] The hydroxyacrylic acid dispersion is Wanhua 2042N,

[0065] The non-silicon high polymer defoamer is BYK012 and BYK015 with a weight ratio of 1:1,

[0066] The pigment is carbon black,

[0067] The filler is sericite,

[0068] The film-forming aid is diethylene glycol methyl ether and alcohol ester-12 with a weight ratio of 1:2,

[0069] The anti-settling agent is benton...

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Abstract

The invention relates to the technical field of water-based intermediate coating, in particular to polishing-free water-based intermediate coating for rail transit and a preparation method thereof. The intermediate coating comprises a component A and a component B. The weight ratio of the component A to the component B is 4:1, wherein the component A is prepared from waterborne polyurethane resin,hydroxyl acrylic acid dispersion, an amine neutralizer, a non-silicon high polymer defoaming agent, pigment, filler, a coalescing agent, an anti-settling agent, a thickening agent and deionized water; the component B comprises an isocyanate curing agent and propylene glycol diacetate. The preparation method comprises the following steps: (1) preparing the component A; (2) preparing the componentB; and (3) mixing the component A and the component B. The intermediate coating is low in surface dyne value and good in interlayer adhesion effect with finish paint, and polishing is not needed.

Description

technical field [0001] The invention relates to the technical field of water-based intermediate coatings, in particular to a polishing-free water-based intermediate coating for rail transit and a preparation method thereof. Background technique [0002] Water-based intermediate coating is an intermediate paint widely used on rail transit vehicles at present. Its main function is to enhance the adhesion between the putty layer and the topcoat layer, and to fill the gap left after the putty construction and grinding. The additives contained in traditional intermediate coatings cause the surface dyne value of the coating to be generally high, generally above 31. A high dyne value will reduce the adhesion between the intermediate coating and the top coat. In order to ensure the adhesion between the layers, the existing technology usually polishes the intermediate coating, so the thickness of the intermediate coating is required to be >60μm. Production Costs have increased si...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D133/04C09D7/65C09D7/63
CPCC08L2205/025C08L2205/035C09D175/04C09D7/63C09D7/65C08L33/04C08L101/00C08L75/04C08K13/02C08K5/06C08K5/103C08K5/17
Inventor 范入豪庞博
Owner 山东七维新材料有限公司
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