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Aquosity bi-component polyurethane coloured paint and method of manufacturing the same

A two-component polyurethane and colored coating technology, which is applied in polyurea/polyurethane coatings, coatings, latex paints, etc., to achieve the effect of reducing pollution

Inactive Publication Date: 2008-01-23
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports on the formulation and performance of the preparation of colored coatings.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Mix 13 parts of water, 0.5 parts of dispersant, 0.2 parts of defoamer, 0.3 parts of wetting agent, 8 parts of iron red pigment, 7 parts of iron and titanium powder, 8 parts of talcum powder, and 12 parts of barium sulfate, and then put them in the sand mill When grinding until the fineness is below 60 μm, add 45.3 parts of water-based polyurethane dispersion, 5 parts of film-forming aid ethylene glycol butyl ether acetate, 0.1 part of fungicide, 0.1 part of anti-flash rust agent, and 0.5 part of thickener and stir After uniformity, 100 parts of component A are obtained, and 5 parts of hydrophilic modified polyisocyanate component B are added when used. After the iron red primer paint is stirred evenly, the performance of the brush board test is as follows: surface dry time 1 hour, hard dry time 18 hours, hardness 2H, impact strength 50Kg.cm, adhesion 100%, flexibility 1mm, gloss 42, water resistance There was no change in sex for 14 days.

Embodiment 2

[0020] Mix 13 parts of water, 0.5 parts of dispersant, 0.2 parts of defoamer, 0.3 parts of wetting agent, 8 parts of iron red pigment, 7 parts of iron and titanium powder, 8 parts of talcum powder, and 12 parts of barium sulfate, and then put them in the sand mill When grinding until the fineness is below 60 μm, add 25.3 parts of water-based polyurethane dispersion, 20 parts of hydroxyl acrylic emulsion, 5 parts of film-forming aid ethylene glycol butyl ether acetate, 0.1 part of fungicide, 0.1 part of anti-flash rust agent, 0.5 parts of thickener are stirred evenly to obtain 100 parts of component A, and 5 parts of hydrophilic modified polyisocyanate component B are added when used. After the iron red primer paint is stirred evenly, the performance of the brush board test is as follows: surface dry time 1 hour, hard dry time 18 hours, hardness 2H, impact strength 50Kg.cm, adhesion 100%, flexibility 1mm, gloss 35, water resistance 14 days without change.

Embodiment 3

[0022] Mix 11 parts of water, 0.4 parts of dispersant, 0.2 parts of defoamer, 0.1 part of wetting agent, and 20.6 parts of titanium dioxide, and then grind them in a sand mill until the fineness is below 20 μm. Add 61 parts of hydroxyacrylic emulsion, 6 parts of film-forming aid ethylene glycol butyl ether acetate, 0.1 part of fungicide, 0.1 part of anti-flash rust agent, 0.5 part of thickener and stir well to obtain 100 parts of component A, and add hydrophilic modified polyisocyanate when using 15 parts of component B. After the white topcoat is stirred evenly, the performance of the brush board test is as follows: surface dry time 1 hour, hard dry time 24 hours, hardness 2H, impact strength 50Kg.cm, adhesion 100%, flexibility 1mm, gloss 84, water resistance 72 No change in hours (brush test on iron red primer).

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Abstract

The invention discloses a two-component waterborne polyurethane colored paint and the preparation method. The components of the paint are 5 to 15 water, 0.2 to 0.5 dispersant, 0.1 to 0.3 antifoamer, 0.1 to 0.3 wetting agent, 3 to 25 paints, 0 to 50 fillers, 10 to 80 film forming resins, 0 to 5 film forming additives, 0.1 to 0.3 disinfectant, 0.1 to 0.3 antiflash rust agent, 0.5 to 2 thickeners, 1 to 20 hydrophilically-modified polyisocyanate. The preparation method is that water, dispersant, antifoamer, wetting agent, paints and fillers are dispersed evenly by a sand mill, a ball mill or a high-speed stirrer after stirring, and are added with film forming resins, film forming additives, disinfectant, antiflash rust agent and thickeners to gain the product-component A. The hydrophilically-modified polyisocyanate is component B. The component A and component B are mixed uniformly when using. The invention is characterized in that the invention does not adopt organic solvents, does not contain toxic paints and has no harm on the human body and environment, and the properties can reach the solvent two-component polyurethane paint, which can be produced to the primer, intermediate coat and finishing coat, and can be applied in the surface of the wooden ware, cement and metals.

Description

technical field [0001] The invention relates to a water-based two-component polyurethane colored paint and a preparation method thereof. technical background [0002] Polyurethane coatings have many excellent properties, such as strong adhesion, good wear resistance, adjustable elasticity, and excellent acid resistance, alkali resistance, high and low temperature resistance, etc. etc. have been widely used. There are many types and varieties of polyurethane coatings, which can be divided into one-component polyurethane coatings and two-component polyurethane coatings according to the packaging type. One-component polyurethane coatings are easy to use, but have poor performance; two-component polyurethane coatings have good film properties due to effective chemical crosslinking. Hydroxy-cured polyurethane coatings are currently the most widely used polyurethane coatings on the market. One component of this coating is a polyisocyanate-containing prepolymer, and the other is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D5/02
Inventor 张发爱余彩莉张雯华
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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