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Abrasion-resistant polyurethane varnish

A technology of polyurethane varnish and polyester resin, used in the field of polyurethane varnish and organic coatings, can solve the problems of loss of gloss and chalking, loss of body protection of the coating film, damage to the coating film, etc., to achieve comprehensive protection, good decorative effect, strong resistance Effects of mechanical friction properties and weathering properties

Active Publication Date: 2013-07-24
广东四方威凯高新技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are two major problems plaguing the coating industry: First, when the organic coating film is exposed to the outdoors for a long time, it is easily damaged by sunlight, especially ultraviolet rays, and produces free radicals, which in turn destroy the organic polymer chain segments in the coating film, resulting in loss of gloss Problems such as powdering not only affect the appearance, but also lead to the peeling of the coating film and the loss of protection for the body; the second is the early loss of gloss of the coating film due to dust friction and other problems when cleaning the locomotive, especially the dark coating film is more For obvious, seriously affect the appearance
[0004] In order to solve the above problems, it is common to add benzotriazole-type organic polymer light stabilizers to reduce the damage of light to the coating film. This additive has a good absorption effect on ultraviolet rays with a wavelength of 300-400 nanometers. The disadvantage is that it has a certain timeliness, and at the same time, it cannot prevent the damage of the coating film by mechanical friction. More importantly, for the purpose of environmental protection, more and more countries (such as Japan, Germany, etc.) have listed benzotriazoles as banned The substance is strictly prohibited to be used in any field

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] This example is a preparation example of the wear-resistant polyamic acid varnish of the present invention.

[0026] Stir 0.1g of polyether-modified organosiloxane and 0.5g of polyurethane-modified wetting and dispersing agent at 200-500RPM for 1-2min, add 6.2g of xylene, 6.2g of butyl ester and 3g of nanofiller DEGUSSA 9200, Disperse at 200-500RPM for 5-10 minutes, add 30 grams of hydroxyl acrylic resin (Cytec SM515), 30 grams of hydroxyl polyester resin (NUPLEX1715) and 24 grams of HDI trimer to prepare a wear-resistant polyacid varnish.

Embodiment 2

[0028] This example is a preparation example of the wear-resistant polyamic acid varnish of the present invention.

[0029] Stir 0.1g of polyether-modified organosiloxane and 0.8g of polyurethane-modified wetting and dispersing agent at 200-500RPM for 1-2min, add 6.1g of xylene, 5g of butyl ester and 3g of nanofiller DEGUSSA 9200, Disperse at 200-500RPM for 5-10 minutes, add 35 grams of hydroxyl-grade acrylic resin, 25 grams of hydroxyl polyester resin and 24 grams of HDI trimer to prepare a wear-resistant polyacid varnish.

Embodiment 3

[0031] Stir 0.1g of polyether-modified organosiloxane and 0.5g of polyurethane-modified wetting and dispersing agent at 200-500RPM for 1-2min, add 5g of xylene, 5.9g of butyl ester and 5g of nano-filler DEGUSSA 9200, in Disperse at 200-500RPM for 5-10 minutes, add 38 grams of hydroxyl acrylic resin, 22 grams of hydroxyl polyester resin and 23 grams of HDI trimer to prepare a wear-resistant polyacid varnish.

[0032] In the weather resistance test of 1000h to the wear-resistant polyurethane varnish that embodiment one, two, three make respectively (full spectrum light energy is about 2160MJ / m 2 , which is equivalent to the sunlight energy received by outdoor use for two years), there is no problem of early loss of light or loss of light in the middle and late stages.

[0033] The following table is the performance comparison of nano-modified wear-resistant polyurethane varnish of the present invention and common polyurethane varnish:

[0034] Coating properties and te...

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PUM

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Abstract

The invention discloses an abrasion-resistant polyurethane varnish, which comprises the following components in percentage by mass: 58-62% of resin, 10-15% of mixed solvent, 2-10% of fumed nano-silica filler, 0.1-0.5% of flatting agent, 0.5-5% of wetting-dispersing agent, and 20-30% of curing agent, wherein the resin is a mixture of acrylic resins and polyester resins, and the mass ratio of the acrylic resins to the polyester resins is (1-2): 1; and the solvent is a mixture of dimethyl benzene and butyl ester, and the mass ratio of the dimethyl benzene to the butyl ester is (1-3): 1. Comparedwith an ordinary polyurethane varnish, a polyurethane varnish prepared according to a formula disclosed by the invention has a film property and a construction property equivalent to those of the ordinary polyurethane varnish, but has a stronger mechanical friction resistant property and a stronger weather-resistant property, and can provide comprehensive protection and good decoration effects for products; and meanwhile, the abrasion-resistant polyurethane varnish is safe and environmentally-friendly.

Description

technical field [0001] The invention relates to the technical field of organic coatings, in particular to the technical field of polyurethane varnishes. Background technique [0002] Organic coatings are widely used for surface coating of most industrial products. Decoration and protection are the two main purposes of painting. The surface of motorcycles is decorated with transparent varnish. Polyurethane varnish is generally used in China. The coating film has a plump and bright appearance, which greatly improves the product grade and has a strong decorative effect. [0003] At present, there are two major problems plaguing the coating industry: First, when the organic coating film is exposed to the outdoors for a long time, it is easily damaged by sunlight, especially ultraviolet rays, and produces free radicals, which in turn destroy the organic polymer chain segments in the coating film, resulting in loss of gloss Problems such as powdering not only affect the appearan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/06C09D7/12
Inventor 方芳朱洪江
Owner 广东四方威凯高新技术有限公司