Novel application of waterborne polyurethane, and waterborne polyurethane cooling coating and preparation method thereof

A water-based polyurethane, a new-purpose technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., to achieve good wear resistance

Inactive Publication Date: 2019-11-19
CHONGQING JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this Chinese patent application, the water-based polyurethane emulsion is only used as an adhesive for the cooling paint, and a certain amount of cooling reflective filler is added when the water-based polyurethane is used to prepare the road cooling paint

Method used

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  • Novel application of waterborne polyurethane, and waterborne polyurethane cooling coating and preparation method thereof
  • Novel application of waterborne polyurethane, and waterborne polyurethane cooling coating and preparation method thereof
  • Novel application of waterborne polyurethane, and waterborne polyurethane cooling coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: Synthesis and performance test of aqueous polyurethane emulsion

[0025] 1. Synthesis of water-based polyurethane emulsion: The raw materials and proportions (by weight and number) used are: 0.1-0.2 parts of dibutyltin dilaurate, 10-15 parts of polypropylene glycol 2000, and 1,4-butyl polyadipate 5-8 parts of diol ester, 1.3-2 parts of 2,2-dimethylolpropionic acid, 10-15 parts of isophorone diisocyanate, 0.5-0.85 parts of pentaerythritol, 6-8 parts of acetone, 1,4- 1.5-2 parts of butanediol, 0.8-1.2 parts of triethylamine, 1-2 parts of γ-aminopropyl triethoxysilane, 55-60 parts of water (deionized water).

[0026] The synthesis steps are as follows:

[0027] ① 2,2-Dimethylolpropionic acid and pentaerythritol were dehydrated under reduced pressure at 80°C for 2 hours.

[0028] ② Dry polypropylene glycol, dibutyltin dilaurate and poly-1,4-butylene adipate under reduced pressure at 120°C for 2 hours, cool down to 85°C, and add 2,2-dimethylolpropionic acid ...

Embodiment 2

[0044] Embodiment 2: preparation and performance test of waterborne polyurethane cooling coating

[0045] 1. Prepare water-based polyurethane cooling coating: raw materials and proportioning (weight and number ratio): 90-95 parts of water-based polyurethane emulsion prepared in embodiment 1, 30-50 parts of filler (filler is calcium carbonate, barium sulfate, diatomaceous earth, One or more of non-reflective fillers with low refractive index such as talcum powder, kaolin, organic bentonite), ammonia water 0-0.5 part (preferably 0.1-0.5 part), color paste 0-1 part, defoamer 0-0.8 parts (preferably 0.5-0.8 parts), dispersant 0-1.0 parts (preferably 0.5-1.0 parts), thickener 0.2-0.6 parts, leveling agent 0-2.5 parts (preferably 1.0-2.0 parts ), 0-15 parts of dipropylene glycol methyl ether (preferably 6-15 parts).

[0046] The preparation steps are as follows:

[0047] 1) Add dispersant and part of defoamer to the aqueous polyurethane emulsion prepared in Example 1 (for example,...

Embodiment 3

[0063] Embodiment 3: Indoor simulated cooling performance test.

[0064] 1. Comparative example of preparation: prepare a water-based polyurethane heat-reflecting cooling coating added with heat-reflecting fillers such as titanium dioxide, and its preparation method is the same as that of the water-based polyurethane cooling coating in Example 2. Three water-based polyurethane heat-reflective cooling coatings added with heat-reflective fillers such as titanium dioxide were prepared as comparative examples. The distribution ratios of each group of the 3 comparative examples are shown in Table 5.

[0065] Table 5 Adding the ratio of water-based polyurethane cooling coatings with heat-reflecting fillers (ratio in parts by weight)

[0066] Component / proportion (ratio by weight) Comparative example 1 Comparative example 2 Comparative example 3 Waterborne Polyurethane Emulsion 90 92 95 ammonia 0.1 0.3 0.5 color paste 0 0.5 1 Dispersant 0...

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Abstract

The invention discloses the novel application of waterborne polyurethane in preparation of a cooling coating. The waterborne polyurethane is used as an adhesive and cooling resin in preparation of thecooling coating. The invention also discloses the waterborne polyurethane cooling coating and a preparation method thereof. The waterborne polyurethane cooling coating is prepared from the followingcomponents in parts by weight: 90 to 95 parts of a waterborne polyurethane emulsion, 0.1 to 0.5 part of ammonia water, 0 to 1 part of color paste, 30 to 50 parts of a filler, 0.5 to 0.8 part of a defoaming agent, 0.5 to 1.0 part of a dispersing agent, 0.2 to 0.6 part of a thickening agent, 1.0 to 2.0 parts of a leveling agent and 6 to 15 parts of dipropylene glycol monomethyl ether, wherein the filler is a non-heat-reflective filler. According to the invention, the new function of waterborne polyurethane is discovered; i.e., the waterborne polyurethane can be used as the cooling resin for preparation of the cooling coating. The waterborne polyurethane cooling coating provided by the invention has a cooling value of 7 DEG C or above without addition of a heat-reflective filler; the coolingvalue of the coating is not affected when anti-skid granules are added; and the waterborne polyurethane cooling coating can be applied to the fields of buildings, wood, leather, roads and the like.

Description

technical field [0001] The invention relates to the technical field of road engineering, in particular to a new application of water-based polyurethane, a water-based polyurethane cooling coating and a preparation method thereof. Background technique [0002] Asphalt pavement is widely used in road construction and development, and people have higher requirements for the coordination of road and environment. However, there are still many problems on the road surface at present, such as: rutting, bulge cracking and other hazards caused by the high temperature of the road surface, the decrease of the anti-skid coefficient of the road surface due to long-term wear, and the fatigue of the driver's optic nerve due to the monotonous color of the road surface. These problems will seriously affect the road surface. safe use performance. In addition, high temperature not only affects the safe use performance of the road surface, but also aggravates the urban heat island effect. [...

Claims

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Application Information

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IPC IPC(8): C09D175/06C09D175/08C09D7/61C09D7/62C08G18/75C08G18/66C08G18/48C08G18/42C08G18/34C08G18/32
CPCC08G18/3206C08G18/348C08G18/4238C08G18/4833C08G18/6607C08G18/755C08K2003/265C08K2003/3045C08K2201/014C09D175/06C09D175/08C09D7/61C09D7/62C09D7/70C08K13/06C08K3/26C08K3/30C08K7/26C08K3/346
Inventor 伍燕丁勇杰苗成成曹雪娟何圳杨孝思
Owner CHONGQING JIAOTONG UNIVERSITY
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