Elastic polyurethane silver paint and preparation method and use method thereof

A technology of elastic polyurethane and silver powder paint, which is applied in polyurea/polyurethane coating, metal-free paint, and a device for coating liquid on the surface, etc. It can solve problems such as thick putty layer, cracking of imitation aluminum plate coating, and complicated reasons , to achieve the effect of preventing cracks on the coating surface, resisting fine cracks, good room temperature and low temperature elasticity

Active Publication Date: 2009-03-18
SHENZHEN GRANDLAND ENVIRONMENTAL COATING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cracking phenomenon of the imitation aluminum plate coating caused by various reasons has been plagued by research and development, production and construction enterprises. In order to solve this problem, the main method currently adopted is to use two-component flexible putty and various fiber mesh cloth to prevent the putty layer Cracking has achieved good results, but because the putty layer is generally thicker, the reasons for cracking are more complicated and it is difficult to completely avoid

Method used

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  • Elastic polyurethane silver paint and preparation method and use method thereof
  • Elastic polyurethane silver paint and preparation method and use method thereof
  • Elastic polyurethane silver paint and preparation method and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Prepare the main paint of polyurethane silver powder paint of the present invention:

[0052] According to the weight shown in Example 1 in Table 1, each component is taken, and the preparation method is as follows:

[0053] Step 1: Pre-dispersion of aluminum-silver paste: Mix the aluminum-silver paste in the formula with an equal amount of xylene, stir at a low speed until there are no aggregated aluminum powder particles, and set aside;

[0054] Step 2: Take the acrylic resin and 20% CAB381-0.5 in the components according to the weight ratio in the formula, stir and mix evenly at a low to medium speed, then add the dispersant, stir at a medium speed for 5-10 minutes, and then add anti Precipitate and disperse at high speed for 5-10 minutes to a fineness of ≤25 μm, then add wax powder under low-speed stirring, and disperse at a high speed for 15 minutes to a fineness of ≤25 μm, then add leveling agent and all remaining solvents at low to medium speed Stir to mix well;...

Embodiment 2

[0064] According to the weight of each component in Example 2 shown in Table 1, repeat the method described in Example 1 to prepare the elastic polyurethane paint main paint, curing agent and diluent. According to the main paint: curing agent: diluent = 115.3:37.7:60, mix evenly and then carry out spraying construction. After spraying and drying naturally, the polyurethane silver powder paint film will be obtained. Dry at room temperature for 24 hours and completely dry for 7 days. The performance testing results (the dry coating film thickness is (1±0.2) mm when testing the elongation, and the rest are in accordance with relevant standards) are shown in the corresponding data of Example 2 in the performance index test results in Table 2.

Embodiment 3

[0066] According to the weight of each component in Example 3, repeat the method described in Example 1 to prepare the elastic polyurethane paint main paint, curing agent and diluent. According to the main paint: curing agent: thinner = 134.4:54.9:80, mix evenly and then carry out spraying construction. After spraying and drying naturally, the polyurethane silver powder paint film will be obtained. Dry it at room temperature for 24 hours and completely dry it for 7 days. The performance testing results (the dry coating film thickness is (1 ± 0.2) mm when testing the elongation rate, and the rest are in accordance with relevant standards) are shown in the corresponding data of Example 3 in the technical index test results in Table 2.

[0067] Table II

[0068]

[0069] Note: The test of weather resistance, acid resistance and mortar resistance should be finished with the same kind of varnish.

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Abstract

The invention discloses elastic polyurethane silver paint. Main paint of the elastic polyurethane silver paint is prepared from compositions according to the following weight proportion: 65 to 85 percent of a hydroxy acrylic acid resin, 2 to 5 percent of 20 percent CAB381-0.5, 0.3 to 0.5 percent of a dispersant, 0.4 to 0.6 percent of an anti-settling agent, 0.3 to 0.5 percent of a flatting agent, 0.4 to 0.8 percent of wax powder, 7 to 10 percent of non-leafing aluminum paste, 7 to 10 percent of dimethylbenzene, and 15 to 22 percent of mixed solvent; a curing agent of the elastic polyurethane silver paint is formed by mixing compositions according to the following weight percent: 75 percent of elastic HDI curing agent, and 25 percent of absolute butyl acetate; and the weight proportion of the main paint to the curing agent is calculated based on a hydroxyl value of acrylic acid resin and the NCO content of the curing agent, and OH/NCO is equal to 1 to (1.05-1.15). The elastic polyurethane silver paint has excellent weather resistance, stain resistance, scrubbing resistance and decoration property, is a coating variety with excellent performance which is second only to fluorocarbon paint, also has good elasticity at normal temperature and low temperature, can resist fine cracks, can prevent cracks on the surface of a coating caused by the fine cracks of a putty layer, and can also be used as finish for a complete anti-cracking aluminum-imitation plate coating system that flexible putty is matched with an elastic primer and an elastic middle coating.

Description

technical field [0001] The invention relates to a two-component elastic polyurethane silver powder paint for building exterior walls and a preparation method and application method thereof. Background technique [0002] In recent years, the coating of imitation aluminum panels on exterior walls has become more and more popular. The decorative effect is similar to that of aluminum panels, but the cost is only about 20% of that of aluminum panels. The coatings used are usually room temperature cross-linked fluorocarbon silver powder paints and polyurethane silver powder paints. However, the cracking phenomenon of the imitation aluminum plate coating caused by various reasons has been plagued by research and development, production and construction enterprises. In order to solve this problem, the main method currently adopted is to use two-component flexible putty and various fiber mesh cloth to prevent the putty layer Cracking has achieved good results, but because the putty l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D5/38B05D7/24
Inventor 胡基如
Owner SHENZHEN GRANDLAND ENVIRONMENTAL COATING CO LTD
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