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Hydrophobic water-based fluorescent polyurethane paint and preparation method thereof

A technology of polyurethane coatings and polyurethanes, applied in the direction of polyurea/polyurethane coatings, luminous coatings, coatings, etc., can solve problems such as limitations

Active Publication Date: 2015-12-09
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, people pay more and more attention to environmental protection, and the use of solvent-based coatings with high content of volatile organic compounds is subject to stricter and stricter restrictions.

Method used

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  • Hydrophobic water-based fluorescent polyurethane paint and preparation method thereof
  • Hydrophobic water-based fluorescent polyurethane paint and preparation method thereof
  • Hydrophobic water-based fluorescent polyurethane paint and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The hydrophobic water-based fluorescent polyurethane coating of the present invention is prepared from the following raw materials according to the following weight ratio: 23% isophorone diisocyanate, 47% diol, 10% hydroxyl-terminated polysiloxane, organotin Catalyst 0.05%, hydrophilic chain extender 4%, end-capping agent 4.3%, triethylamine 3.7%, dodecafluoroheptyl methacrylate 8%, ammonium persulfate 0.4%, aziridine crosslinking agent 5%, Tellurium powder 0.008%, sodium borohydride 0.005%, chromium chloride hydrate 0.028%, mercaptopropionic acid 0.03%, and the rest is water.

[0050] Concrete preparation process is as follows:

[0051] (1) Add isophorone diisocyanate, polytetrahydrofuran ether glycol (Mn=2000), hydroxyl-terminated polysiloxane and tin catalysts into the reactor according to the above weight values, stir evenly with a mechanical stirrer, and then Raise the temperature to 80°C for 4 hours, then add dimethylolpropionic acid to the mixing system, heat to...

Embodiment 2

[0059] The preparation process of the hydrophobic water-based fluorescent polyurethane coating described in this embodiment is similar to that of Example 1, and the difference is: (1) the raw material proportioning in this embodiment is: 20% of isophorone diisocyanate, 50% of dibasic alcohol , hydroxyl-terminated polysiloxane 8%, organotin catalyst 0.04%, hydrophilic chain extender 3.5%, end-capping agent 4.5%, triethylamine 4%, dodecafluoroheptyl methacrylate 8%, persulfuric acid Ammonium 0.6%, aziridine crosslinking agent 3%, tellurium powder 0.009%, sodium borohydride 0.004%, chromium chloride hydrate 0.029%, mercaptopropionic acid 0.02%, and the rest is water. (2) The inorganic CdTe quantum dot phase is mixed with the obtained aqueous polyurethane phase according to the volume ratio of 2:1.

[0060] For performance characterization see figure 2 ,From figure 2 It can be seen that the water-based fluorescent polyurethane coating can still maintain a good fluorescent effe...

Embodiment 3

[0062] The preparation process of the hydrophobic water-based fluorescent polyurethane coating described in this embodiment is similar to that of Example 1, the difference is: (1) the raw material proportioning in this embodiment is: 23% of isophorone diisocyanate, 45% of dibasic alcohol , Hydroxyl-terminated polysiloxane 12%, organotin catalyst 0.06%, hydrophilic chain extender 3%, end-capping agent 3%, triethylamine 3.5%, dodecafluoroheptyl methacrylate 10%, persulfuric acid Ammonium 0.5%, aziridine crosslinking agent 2%, tellurium powder 0.006%, sodium borohydride 0.006%, chromium chloride hydrate 0.03%, mercaptopropionic acid 0.04%, and the rest is water. (2) The inorganic CdTe quantum dot phase is mixed with the obtained aqueous polyurethane phase according to the volume ratio of 3:1.

[0063] For performance testing see Figure 6 , by measuring the contact angle of hydrophobic fluorescent polyurethane paint with water, it is found that the contact angle is above 100°, w...

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Abstract

The invention discloses hydrophobic water-based fluorescent polyurethane paint and a preparation method thereof and relates to fluorescent materials and preparation methods thereof. The hydrophobic water-based fluorescent polyurethane paint is transparent water-based fluorescent type polyurethane emulsion and composed of polyurethane phases and inorganic fluorescent quantum dots. The preparation method of the paint comprises the steps that a self-emulsifying method is adopted, diisocyanate, dihydric alcohol, hydrophilic chain extenders, siloxane, fluorine-containing acrylic resin and the like are selected as raw materials for preparing water-based polyurethane emulsion which is high in transparency and good in hardness, then a hydro-thermal method is adopted for preparing CdTe quantum dot aqueous solutions different in grain diameter, the polyurethane emulsion is mixed with the different CdTe quantum dot solutions according to different proportions, the fluorescent type water-based polyurethane emulsion is obtained, finally cross-linking agents are added for conducting paint film curing, and the water-based fluorescent type polyurethane paint high in coating performance is obtained. According to the hydrophobic water-based fluorescent polyurethane paint and the preparation method thereof, through the design for polyurethane and adjustment on the percentage of the added quantum dots, a series of fluorescent paint are obtained, and the paint is short in drying time, excellent in hydrophobic performance high in hardness and great in cohesiveness with a substrate.

Description

technical field [0001] The invention relates to a fluorescent material and a preparation method thereof, in particular to a fluorescent water-based polyurethane coating and a preparation method thereof. Background technique [0002] With the rapid development of the national economy, the demand for coatings is increasing year by year. At the same time, people pay more and more attention to environmental protection, and the use of solvent-based coatings with a high content of volatile organic compounds is increasingly restricted. Waterborne polyurethane (WPU) is a green and environmentally friendly coating with polyurethane as the base material and water as the dispersion medium. Compared with traditional solvent-based polyurethanes, WPU not only retains the advantages of traditional solvent-based polyurethanes, but also has excellent properties such as non-toxic, non-flammable, and environmentally friendly. It has been widely used in coatings, adhesives, leather finishing a...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D5/22C08G18/48C08G18/61C08G18/66
Inventor 刘向阳于芳芳林乃波
Owner XIAMEN UNIV
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