Polyurethane transparent matt topcoat, preparation method and use method thereof

A polyurethane and transparent technology, applied in the field of polyurethane paint, can solve the problems of furniture surface damage, paint film surface is easy to be scratched, etc., and achieve the effect of improving scratch resistance, smooth hand feeling and good weather resistance

Active Publication Date: 2009-03-11
SHENZHEN GRANDLAND ENVIRONMENTAL COATING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a common problem in these transparent matte finishes, that is, the surface of the paint film is easily scratched, causing damage to the furniture surface using these paints.

Method used

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  • Polyurethane transparent matt topcoat, preparation method and use method thereof
  • Polyurethane transparent matt topcoat, preparation method and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Preparation of polyurethane anti-scratch transparent matte finish paint main paint of the present invention:

[0062] Step 1: First prepare 20% anti-scratch resin solution. Add xylene and butanone into the container at a ratio of 1:1, add anti-scratch resin VAGH while stirring, disperse at 800 RPM for 30 minutes until completely dissolved, and obtain VAGH solution with a weight percentage of 20% for use;

[0063] Step 2: Add alkyd resin, elastic resin, and dispersant sequentially according to the weight ratio shown in Example 1 of Table 1, and disperse at 500RPM for 3 to 5 minutes until uniform, while stirring, add matting powder, glass powder, wax powder, 1000RPM Disperse for 15 minutes until the fineness is ≤25um, then add leveling agent, anti-sedimentation agent, butyl acetate, propylene glycol ether acetate, xylene in order by weight, and disperse evenly for 10 minutes at 800RPM.

[0064] Step 3: Take 5Kg of the 20% VAGH resin solution obtained in the above step 1,...

Embodiment 2

[0078] With the weight of each component listed in Example 2 in Table 1, repeat the method described in Example 1 (only the weight of each component changes), prepare the main paint of polyurethane anti-scratch transparent matt finish paint; repeat in Example 1 The components, proportions and preparation methods of curing agent and diluent are prepared to obtain curing agent and diluent; mix the main agent with curing agent and diluent according to the ratio of 100:50:60 and let it stand for 10 minutes, and then follow the steps in Example 1. The above method is used for construction and drying to obtain the polyurethane anti-scratch transparent matte finish paint film.

[0079] The routine performance test results are shown in the corresponding data of Example 2 in Table 2.

Embodiment 3

[0081] With the weight of each component listed in Example 3 in Table 1, repeat the method described in Example 1 (only the weight of each component changes), prepare the main agent of polyurethane anti-scratch transparent matte finish paint; repeat in Example 1 Components, proportions and preparation methods of curing agent and diluent Prepare curing agent and diluent; mix the main agent, curing agent and diluent uniformly according to 100:50:60, and then carry out construction and preparation according to the method described in Example 1 Dried to obtain a polyurethane anti-scratch transparent matte topcoat film.

[0082] The routine performance test results are shown in the corresponding data of Example 3 in Table 2.

[0083] Table II

[0084] serial number Test items Example 1 Example 2 Example 3 1 Viscosity (KU / 25℃) 63 81 90 2 gel time >4 hours >4 hours >4 hours 3 Drying time (minutes) 95 90 100 4...

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Abstract

The invention relates to transparent matt polyurethane varnish. The preparation method of the varnish comprises the following steps: according to weight percentage, 40 to 60 percent of alkyd, 10 to 40 percent of elastic resin and 0.3 to 1.0 percent of a dispersant are sequentially added and are dispersed at the speed of 500 revolutions per minute for 3 to 5 minutes to evenness; while stirring, 2.0 to 5.0 percent of flatting powder, 3.0 to 10 percent of glass powder and 0.5 to 2.0 percent of wax powder are added and are dispersed for 15 minutes at the speed of 1,000 revolutions per minute till the fineness is less than or equal to 25 mu m; 0.2 to 0.5 percent of a leveling agent, 0.2 to 0.5 percent of an antisettling agent and 13.6 percent of a mixed solvent are sequentially added and are dispersed for 10 minutes at the speed of 800 revolutions per minute; 1.0 to 5.0 percent against 20 percent scratch resistant resin which is pre-dispersed is added into a varnish material obtained by the steps under the low-speed stirring; and after adding, the varnish material is dispersed for 10 to 15 minutes at the speed of 500 revolutions per minute to evenness and is filtered to obtain the transparent matt anti-scratch polyurethane varnish. The crosslinking density NCO/OH of the varnish and a curing agent is between 1.0 and 1.1; and the curing agent is mixed by the following compositions in weight percentage: 25 percent of aliphatic poly-isocyanate, 45 percent of aromatic poly-isocyanate and 30 percent of anhydrous butyl acetate. The varnish has good scratch resistance and high hardness; and a varnish film has smooth hand feeling, good transparence, does not blanch basically, has good storage stability and can be recoated.

Description

technical field [0001] The invention relates to polyurethane paint, in particular to an anti-scratch transparent matte polyurethane topcoat and its preparation method and application method. Background technique [0002] At present, there are many kinds of polyurethane paints on the market, especially PU transparent matte topcoats, such as anti-yellowing transparent matte topcoats, transparent matte topcoats that require good hand feeling, fullness, and good transparency. Both are more. However, there is a common problem in these transparent matte finishes, that is, the surface of the paint film is easily scratched, causing damage to the furniture surface using these paints. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a scratch-resistant transparent matte finish paint and its preparation method and application method. [0004] In order to solve the above technical problems, the present invention provides a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/14C09D5/00B05D7/24
Inventor 郭忠义
Owner SHENZHEN GRANDLAND ENVIRONMENTAL COATING CO LTD
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