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A polyurethane composition for woodware with visible gelling characteristics and its preparation method

A composition, polyurethane technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of easy peeling, poor water dispersibility, no protection and decorative performance, etc., to ensure construction quality, easy mixing and uniformity, high market The effect of practical value

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

AI Technical Summary

Problems solved by technology

However, after the activation period is exceeded, the mixed solution is still in a liquid state, and the user cannot detect that the mixed solution is no longer usable, so it will continue to be used by the builder
Under such circumstances, the paint film formed by construction and coating has no protective and decorative properties, and it is easy to fall off and cause sickness; at the same time, most of the current water-based curing agents have the problem of poor water dispersibility, and often require high-speed shear dispersion to mix evenly

Method used

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  • A polyurethane composition for woodware with visible gelling characteristics and its preparation method
  • A polyurethane composition for woodware with visible gelling characteristics and its preparation method
  • A polyurethane composition for woodware with visible gelling characteristics and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] Prepare component A and component B according to the ingredients and weight percentages shown in Table 1.

[0091] Table 1 Components and weight percent

[0092]

[0093]

[0094] a. Prepare the main paint of component A: first add water with a total weight of 25% in the dispersion tank, add dispersant, titanium dioxide, and disperse at a high speed of 1500-2000r / min for 10-15 minutes; then add Hydroxyacrylate dispersion resin, polyurethane dispersion resin, and disperse at a medium speed of 600-700r / min; then slowly add matting pulp; disperse at a high speed of 1000-1200r / min for 10-15min, then add film-forming aids , wetting agent TEGO WET 270, thickener, defoamer TEGO FOAMEX 810, mixed solution of leveling agent, after medium-speed dispersion for 10-15 minutes, add preservative and the remaining water in the tank, after medium-speed dispersion for 10 minutes, Sampling and testing the fineness of the finished product is in the range of 20-35um, the viscosity is...

Embodiment 2

[0099] Prepare component A and component B according to the ingredients and weight percentages shown in Table 1.

[0100] a. Prepare the main paint of component A: first add water with a total weight of 25% in the dispersion tank, add dispersant, titanium dioxide, and disperse at a high speed of 2000-2500r / min for 10-15 minutes; then add Hydroxyacrylate dispersion resin, polyurethane dispersion resin, and disperse at a medium speed of 700-800r / min; then slowly add matting pulp; disperse at a high speed of 1200-1500r / min for 10-15min, then add film-forming aids , wetting agent TEGO WET 270, thickener, defoamer TEGO FOAMEX 810, mixed solution of leveling agent, after medium-speed dispersion for 10-15 minutes, add preservative and the remaining water in the tank, after medium-speed dispersion for 10 minutes, Sampling and testing the fineness of the finished product is in the range of 20-35um, the viscosity is in the range of 95-105KU, filtered, canned and packaged.

[0101] The ...

Embodiment 3

[0105] Prepare component A and component B according to the ingredients and weight percentages shown in Table 1.

[0106] a. Prepare the main paint of component A: first add water with a total weight of 25% in the dispersion tank, add dispersant, titanium dioxide, and disperse at a high speed of 1500-2300r / min for 10-15 minutes; then add in the dispersion tank Hydroxyacrylate dispersion resin, polyurethane dispersion resin, and disperse at a medium speed of 650-750r / min; then slowly add matting pulp; disperse at a high speed of 1000-1500r / min for 10-15min, then add film-forming aids , wetting agent TEGO WET 270, thickener, defoamer TEGO FOAMEX 810, mixed solution of leveling agent, after medium-speed dispersion for 10-15 minutes, add preservative and the remaining water in the tank, after medium-speed dispersion for 10 minutes, Sampling and testing the fineness of the finished product is in the range of 20-35um, the viscosity is in the range of 95-105KU, filtered, canned and p...

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Abstract

The invention discloses a polyurethane composition with a visual gelling feature for carpentry and a preparation method. The polyurethane composition is prepared from the following components in parts by weight according to the claims and specification: hydroxyl polyacrylate dispersion resin, a waterborne polyurethane dispersion, a dispersing agent, titanium dioxide, flatting pulp, a film forming aid, a wetting agent, an antifoaming agent, a thickening agent, a leveling agent, a preservative and water. A white paint prepared from the components serves as a main paint and is mixed with a curing agent for more than an activation period; the liquid paint is gelled to remind a constructor in time, and the construction quality is ensured; the polyurethane composition has a remarkably high market practical value.

Description

technical field [0001] The invention relates to a water-based two-component white wood paint, in particular to a polyurethane composition with visible gelling characteristics and a preparation method thereof. Background technique [0002] Since the beginning of the 21st century, with the continuous enhancement of people's awareness of environmental protection and health, the restrictions on VOC in various countries' environmental protection regulations have gradually become stricter, and solvent-based wood coatings have been challenged unprecedentedly. From the perspective of environmental protection, water-based coatings are increasingly becoming a research and development hotspot. In China, the average annual growth rate of water-based wood coatings has exceeded 15% in the past five years. Water-based wood coatings have become a future development trend to replace traditional solvent-based coatings. [0003] Although traditional one-component water-based wood coatings hav...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D7/42C09D7/61C08G18/79C08G18/62
CPCC08G18/6225C08G18/79C08G18/792C08L2205/025C08L2205/035C09D7/61C09D7/63C09D175/04C08L75/04C08L33/04C08K13/02C08K3/36C08K5/053
Inventor 高建东徐霭莹
Owner NIPPON PAINT CHINA
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