PU matte white finish paint and preparation method thereof

A white topcoat, matte technology, applied in coatings, polyurea/polyurethane coatings, fireproof coatings, etc., can solve the problems of low hardness of the paint film, low temperature resistance, poor water resistance, etc.

Active Publication Date: 2020-03-06
SHANGHAI CARPOLY PAINT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing paint film has low hardness, poor water resistance, is easily permeated by water vapor, and is not resistant to high temperature, easy to foam and fall off

Method used

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  • PU matte white finish paint and preparation method thereof
  • PU matte white finish paint and preparation method thereof
  • PU matte white finish paint and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0048] The preparation method of the anti-settling slurry includes the following steps: select a clean and standard dispersing tank, put polyamide wax and xylene 2 in sequence, start the dispersing machine, and disperse for 15-20 minutes at 600-800 rpm.

[0049] The present invention has no special limitation on the types of the polyamide wax and xylene 2.

[0050] The n-butyl acetate 1 and propylene glycol methyl ether acetate 1 can adjust the viscosity of the paint and the fluidity and penetration of the film. The mass percent of the n-butyl acetate 1 is 1% to 3%, preferably 1% to 2%, more preferably 1.8%; the mass percent of the propylene glycol methyl ether acetate 1 is 0.5% to 3%, preferably 0.8% to 2%, more preferably 1%. The present invention has no special restrictions on the models of the n-butyl acetate 1 and propylene glycol methyl ether acetate 1.

[0051] The raw material of component B in the present invention includes n-butyl acetate 2 with a mass percentage o...

Embodiment 1

[0066] This embodiment provides a kind of PU matte white topcoat, which is prepared by components A, B and C in a mass ratio of 1:0.5:0.5:

[0067] The raw material of A component is made up of the component of following weight percent:

[0068]

[0069] The viscosity of H32-70J lauric alkyd resin is 12S~15S, the hydroxyl value is 110mgKOH / g~130mgKOH / g, and the acid value is 10mgKOH / g~12mgKOH / g.

[0070] The preparation method of component A is as follows: select a clean dispersion cylinder that meets the standards, put in H32-70J lauric alkyd resin, dispersant, and anti-sedimentation agent in sequence, start the disperser, and disperse at a low speed of 300-500 rpm 5 to 10 minutes; then add rutile titanium dioxide, matting agent, leveling agent, defoamer, n-butyl acetate 1 in turn under stirring, and disperse at 800 to 1200 rpm for 10 to 20 minutes at high speed until the fineness ≤30um; finally add propylene glycol methyl ether acetate 1 to adjust the viscosity to: 8500m...

Embodiment 2

[0084] This embodiment provides a kind of PU matte white topcoat, which is prepared by components A, B and C in a mass ratio of 1:0.5:0.5:

[0085] The raw material of A component is made up of the component of following weight percent:

[0086]

[0087] The viscosity of H32-70J lauric alkyd resin is 12S~15S, the hydroxyl value is 110mgKOH / g~130mgKOH / g, and the acid value is 10mgKOH / g~12mgKOH / g.

[0088] The preparation method of component A is as follows: select a clean dispersion cylinder that meets the standards, put in H32-70J lauric alkyd resin, dispersant, and anti-sedimentation agent in sequence, start the disperser, and disperse at a low speed of 300-500 rpm 5 to 10 minutes; then add rutile titanium dioxide, matting agent, leveling agent, defoamer, n-butyl acetate 1 in turn under stirring, and disperse at 800 to 1200 rpm for 10 to 20 minutes at high speed until the fineness ≤30um; finally add propylene glycol methyl ether acetate 1 to adjust the viscosity to: 8500m...

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Abstract

The invention relates to PU matte white finish paint and a preparation method thereof. The white finish paint consists of A, B and C components according to a mass ratio being 1 : 0.5 - 0.6 : 0.5 - 0.7; the A component consists of 40-60% of lauric alkyd resin, 0.5-2% of a dispersing agent, 3-6% of anti-settling slurry , 25-38% of titanium dioxide, 3-6% of a flatting agent, 0.5-2% of a leveling agent, 0.5-2% of a antifoaming agent, 1-3% of n-butyl acetate 1 and 0.5-3% of propylene glycol monomethyl ether acetate 1; the B component consists of 40-60% of n-butyl acetate 2, 10-20% of a TDI trimercuring agent, 15-30% of TDI prepolymer 1 and 10-20% of a HDI trimer curing agent; and the C component consists of 45-60% of n-butyl acetate 3, 35-45% of propylene glycol monomethyl ether acetate 2 and5-10% of xylene. The obtained white finish paint is strong in adhesive force, high in hardness, good in adherence, resistant to high temperature and humidity, excellent in comprehensive performance and wide in application field.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a PU matte white finish paint and a preparation method thereof. Background technique [0002] Topcoat, also known as finish paint, is the last layer applied in building wall decoration, and the overall effect after decoration is reflected through this layer. Therefore, there are high requirements for the materials used, which are required to have good pollution resistance, aging resistance, moisture resistance, mildew resistance, environmental protection, safety and non-toxicity, no fire hazard, convenient construction, fast drying of the coating film, and protection Good light retention, good air permeability and so on. [0003] The skirting line surrounds the corner of the wall, which has the function of beautifying and protecting the wall. However, because the skirting line of the shower room is in a high temperature and high humidity state for a long time, the topcoat paint film will...

Claims

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Application Information

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IPC IPC(8): C09D175/06C09D5/18C09D7/20C08G18/42
CPCC08G18/4288C09D5/18C09D175/06C09D7/20
Inventor 林荣成张建平朱宏宇
Owner SHANGHAI CARPOLY PAINT
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