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Time-delayed aliphatic polyurethane topcoat

An aliphatic polyurethane and topcoat technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve problems such as unusable, unguaranteed coating quality, and unguaranteed use of coatings

Active Publication Date: 2020-09-01
CHANGZHOU GUANGHUI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the need for circulation in the pipeline, 50-60 kg of paint will remain in the shower tank every time during the shower coating process and cannot be used
[0004] The existing aliphatic polyurethane topcoat is a two-component coating composed of aliphatic polyurethane and hydroxyl-containing acrylic resin, pigment fillers, additives, and solvents. The two-component aliphatic polyurethane coating of this composition exceeds 4 It will thicken in an hour and cannot be used. Due to the limited application period of the two-component coating, the coating factory stipulates that the remaining materials should be stored in the refrigerator, and the temperature of the refrigerator is -3 degrees to -5 degrees. Use within the applicable period, the coating quality cannot be guaranteed

Method used

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  • Time-delayed aliphatic polyurethane topcoat
  • Time-delayed aliphatic polyurethane topcoat
  • Time-delayed aliphatic polyurethane topcoat

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Experimental program
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Embodiment 1-4

[0037] The composition of time-delay type aliphatic polyurethane topcoat by mass parts is shown in Table 1:

[0038] According to the mass ratio of 30:70, add cellulose acetate butyrate into butyl acetate, stir while adding, until completely dissolved, and obtain 30% cellulose acetate butyrate solution.

[0039] Table 1

[0040]

[0041] The preparation method of above-mentioned delay type aliphatic polyurethane topcoat comprises following processing steps:

[0042] (1) Pre-dissolve cellulose acetate butyrate into a 30% uniform liquid with a solvent for subsequent use.

[0043] (2) Add a small amount of paint thinner into the mixing tank, pour resin, add DISPERBYK110 dispersant 0.5%, disperse at high speed until a uniform liquid is formed, add pigment powder and continue stirring at high speed, then grind with a horizontal sand mill, After grinding to fineness <20, fine-tune the color, add leveling agent, defoamer, anti-settling agent, ultraviolet light absorber, stir eve...

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Abstract

The invention provides a time-delayed aliphatic polyurethane topcoat comprising a main agent and a curing agent. Cellulose acetate butyrate is firstly added to butyl acetate until the cellulose acetate butyrate is completely dissolved, a 30% cellulose acetate butyrate solution is obtained, the cellulose acetate butyrate solution is added to resin matrix together with other components to obtain themain agent, and then the main agent is used in combination with the curing agent component to prepare the time-delayed aliphatic polyurethane topcoat.

Description

technical field [0001] The invention belongs to the field of painting, in particular to a time-delay type aliphatic polyurethane topcoat. Background technique [0002] An aliphatic polyurethane topcoat is a protective topcoat, usually a two-component aliphatic polyurethane. Two-component aliphatic polyurethane has excellent physical, mechanical and chemical resistance properties that cannot be compared with one-component coatings, but it must be stirred on site during use, and the reaction speed is fast. The general construction period is about 4 hours. Pot life restrictions limit the use of aliphatic polyurethane two-component coatings. [0003] For substrates with various shapes and different surface treatments, it is impossible to accurately calculate the amount of paint used, resulting in a waste of paint materials. In the coating industry of transformer chip radiators, since the workpiece is combined by uniform heat sinks, the gap between the sheets is insufficient, s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C08G18/64C08G18/62
CPCC08G18/4081C08G18/6225C08G18/6484C09D175/04
Inventor 张小玉赵绍洪
Owner CHANGZHOU GUANGHUI CHEM
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