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Environment-friendly PU matte varnish

A clear topcoat, matte technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of uneven gloss, poor transparency of recoating, loss of wear resistance, etc.

Active Publication Date: 2014-10-22
广东花王涂料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the deepening of people's understanding of coating products, ordinary PU matte clear topcoats have disadvantages such as poor recoating transparency, old paint film, uneven gloss, and non-wear-resistant paint film due to the use of fumed silica as a matting material. Moreover, most PU matte varnish films have low solid content, and it takes multiple coatings to meet the film thickness requirements. During coating, a large amount of organic volatiles and free isocyanates volatilize into the atmosphere, seriously polluting the atmospheric environment, and also harmful to the health of construction workers. cause harm
[0003] Since abrasion resistance and surface roughness are contradictory, abrasion resistance must be lost while possessing transparency. Therefore, it is more challenging to prepare abrasion-resistant and transparent PU matte paint

Method used

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  • Environment-friendly PU matte varnish

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] 1) Prepare 30% glass paste

[0054]

[0055] Put in coconut oil fatty acid resin, methyl isobutyl ketone (MIBK), propylene glycol methyl ether acetate and wetting and dispersing agent (EFKA-4010), stir evenly at 700 rpm, put in glass powder, and use part of propylene glycol Clean the side of the tank with methyl ether acetate, disperse until the fineness is ≤25μm at 1200 rpm, stop the machine and add the remaining propylene glycol methyl ether acetate, stir evenly at 650 rpm, and filter through a 120-mesh filter to obtain 30 % glass pulp, stand-by, pay attention to stirring evenly before adding.

[0056] 2) Preparation of paint main agent components:

[0057]

[0058] The preparation method is:

[0059] Add fatty acid short oil alkyd resin, thixotropic resin, and xylene into the dispersing tank, stir at a low speed of 700 rpm for 10 minutes until fully uniform, and add wetting and dispersing agent, leveling agent A, flow Leveling agent B, defoamer, methyl isobu...

Embodiment 2

[0068] 1) Prepare 30% glass paste

[0069]

[0070]

[0071] Put in coconut oil fatty acid resin, methyl isobutyl ketone (MIBK), propylene glycol methyl ether acetate and wetting and dispersing agent (EFKA-4010), stir evenly at 700 rpm, put in glass powder, and use part of propylene glycol Clean the side of the tank with methyl ether acetate, disperse until the fineness is ≤25μm at 1200 rpm, stop the machine and add the remaining propylene glycol methyl ether acetate, stir evenly at 650 rpm, and filter through a 120-mesh filter to obtain 30 % glass pulp, stand-by, pay attention to stirring evenly before adding.

[0072] 2) Preparation of paint main agent components:

[0073]

[0074] The preparation method is:

[0075] Add fatty acid short oil alkyd resin, thixotropic resin, and xylene into the dispersing tank, stir at a low speed of 750 rpm for 10 minutes until fully uniform, and add wetting and dispersing agent, leveling agent A, flow Leveling agent B, defoamer, ...

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Abstract

The invention discloses application of glass powder to preparing PU matte varnish. The application is characterized in that the glass powder is firstly prepared into 30% glass slurry in which the glass powder is uniformly dispersed and not settled; then, the 30% glass slurry is applied to a varnish main agent component of the PU matte varnish, wherein dosage is 10%-20%; and the 30% glass slurry is prepared from the following components in percentage by weight: 47% of coconut oil fatty acid resin, 2% of methyl isobutyl ketone (MIBK), 8% of propylene glycol methyl ether acetate, 3% of a wetting dispersant (EFKA-4010), 30% of glass powder and 10% of propylene glycol methyl ether acetate, wherein the coconut oil fatty acid resin is coated with the glass powder and then uniformly suspended in a mixture, so that wetting performance of the glass powder is improved. The PU matte varnish disclosed by the invention is PU matte varnish which is environmental friendly, good in transparency, good in wear resistance and stable in gloss.

Description

technical field [0001] The invention relates to the field of wood coatings, in particular to an environmentally friendly PU matte clear finish with good abrasion resistance and transparency. Background technique [0002] With the deepening of people's understanding of coating products, ordinary PU matte clear topcoats have disadvantages such as poor recoating transparency, old paint film, uneven gloss, and non-wear-resistant paint film due to the use of fumed silica as a matting material. Moreover, most PU matte varnish films have low solid content, and it takes multiple coatings to meet the film thickness requirements. During coating, a large amount of organic volatiles and free isocyanates volatilize into the atmosphere, seriously polluting the atmospheric environment, and also harmful to the health of construction workers. Harm. [0003] Since abrasion resistance and surface roughness are contradictory, abrasion resistance must be lost while possessing transparency. Ther...

Claims

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Application Information

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IPC IPC(8): C09D7/12C09D175/14
Inventor 方学平严修才杨长春
Owner 广东花王涂料有限公司
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