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Waterborne mirror-surface polyurethane coating

A polyurethane coating and water-based polyurethane technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of uneven dispersion, not completely flat, and orange peel on the surface of the coating

Inactive Publication Date: 2021-04-20
安徽五星高新材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a water-based mirror-surface polyurethane coating, which is used to solve the problem that in the coating construction process at the present stage, as the coating cools and forms a film, the surface tension of the coating film produces a gradient change, the viscosity of the system increases, and the pigment and filler Uneven dispersion, orange peel, shrinkage cavity, haze and other phenomena are prone to occur, resulting in uneven dispersion of the coating surface, which is not completely flat.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A water-based mirror surface polyurethane coating, comprising the following raw materials in parts by weight: 40 parts of water-based polyurethane resin, 10 parts of calcium carbonate, 10 parts of kaolin, 5 parts of titanium dioxide, 1 part of dispersant, 4 parts of special leveling agent, 4 parts of brightener, 1 part of antibacterial agent, 70 parts of water;

[0027] The water-based mirror polyurethane coating is made by the following steps:

[0028] Step S1: Under room temperature conditions, thoroughly clean the mixing tank, and after cleaning, dry the inside of the mixing tank for use;

[0029] Step S2: Add water into the stirring tank, raise the temperature to 50°C, add water-based polyurethane resin, calcium carbonate, kaolin and titanium dioxide into the stirring tank in sequence at a speed of 200r / min, and continue at a temperature of 50°C and a speed of 400r / min Stirring and mixing for 20 minutes under the condition to obtain the mixed material 1;

[0030] ...

Embodiment 2

[0033] A water-based mirror surface polyurethane coating, comprising the following raw materials in parts by weight: 50 parts of water-based polyurethane resin, 12.5 parts of calcium carbonate, 12.5 parts of kaolin, 7.5 parts of titanium dioxide, 3 parts of dispersant, 5 parts of special leveling agent, 5 parts of brightener, 2 parts of antibacterial agent, 80 parts of water;

[0034] The water-based mirror polyurethane coating is made by the following steps:

[0035] Step S1: Under room temperature conditions, thoroughly clean the mixing tank, and after cleaning, dry the inside of the mixing tank for use;

[0036]Step S2: Add water into the stirring tank, raise the temperature to 55°C, add water-based polyurethane resin, calcium carbonate, kaolin and titanium dioxide into the stirring tank in sequence at a speed of 300r / min, and continue at a temperature of 55°C and a speed of 500r / min Stirring and mixing for 25 minutes under the condition to obtain the mixed material 1;

...

Embodiment 3

[0040] A water-based mirror surface polyurethane coating, comprising the following raw materials in parts by weight: 60 parts of water-based polyurethane resin, 15 parts of calcium carbonate, 15 parts of kaolin, 10 parts of titanium dioxide, 5 parts of dispersant, 6 parts of special leveling agent, 6 parts of brightener, 3 parts of antibacterial agent, 90 parts of water;

[0041] The water-based mirror polyurethane coating is made by the following steps:

[0042] Step S1: Under room temperature conditions, thoroughly clean the mixing tank, and after cleaning, dry the inside of the mixing tank for use;

[0043] Step S2: Add water into the stirring tank, raise the temperature to 60°C, add water-based polyurethane resin, calcium carbonate, kaolin and titanium dioxide into the stirring tank in sequence at a speed of 400r / min, and continue at a temperature of 60°C and a speed of 600r / min Stirring and mixing for 30min under the condition to obtain the mixed material 1;

[0044] St...

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Abstract

The invention discloses a waterborne mirror surface polyurethane coating which comprises the following raw materials in parts by weight: 40-60 parts of waterborne polyurethane resin, 10-15 parts of calcium carbonate, 10-15 parts of kaolin, 5-10 parts of titanium dioxide, 1-5 parts of a dispersing agent, 4-6 parts of a specially-made leveling agent, 4-6 parts of a brightening agent, 1-3 parts of an antibacterial agent and 70-90 parts of water. By adding the brightening agent, the specially-made leveling agent and the antibacterial agent, the obtained coating has the effect of a high-brightness mirror surface, the phenomena of shrinkage cavities, flooding and the like are smoothly generated, good environment-friendly performance is achieved, and the problems that in the coating construction process at the present stage, gradient change is generated along with coating cooling film forming and coating film surface tension, the systme viscosity is increased, the coating dispersion is non-uniform, the phenomena of orange peel-state surface, shrinkage cavities, fog shadows and the like easily happen, and accordingly the surface of the coating is non-uniform in dispersion and is not competely flat are effectively solved..

Description

technical field [0001] The invention relates to the technical field of water-based polyurethane coatings, in particular to a water-based mirror surface polyurethane coating. Background technique [0002] Polyurethane (PU), the full name of polyurethane, is a polymer compound. Soft polyurethane mainly has a thermoplastic linear structure, which has better stability, chemical resistance, resilience and mechanical properties than PVC foam materials, and has smaller compression set. Good heat insulation, sound insulation, shock resistance and anti-virus performance. Therefore, it is used as packaging, sound insulation, and filter materials. Rigid polyurethane plastic is light in weight, excellent in sound insulation and heat insulation performance, chemical resistance, good electrical performance, easy to process, and low water absorption. It is mainly used in construction, automobile, aviation industry, and structural materials for thermal insulation. The performance of pol...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D7/47C09D7/20C09D7/65C08F220/18C08F220/20C08F230/02
Inventor 刘建民方华高段炳新刘钦东段盛楠
Owner 安徽五星高新材料有限公司
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