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A kind of hydrophobic water-based fluorescent polyurethane coating 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: 2017-10-20
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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  • A kind of hydrophobic water-based fluorescent polyurethane coating and preparation method thereof
  • A kind of hydrophobic water-based fluorescent polyurethane coating and preparation method thereof
  • A kind of hydrophobic water-based fluorescent polyurethane coating and preparation method thereof

Examples

Experimental program
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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%, cadmium 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%, cadmium 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 effec...

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%, cadmium 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°, wh...

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Abstract

A hydrophobic water-based fluorescent polyurethane coating and a preparation method thereof relate to a fluorescent material and a preparation method thereof. The hydrophobic water-based fluorescent polyurethane coating is a transparent water-based fluorescent polyurethane emulsion, which is composed of a polyurethane phase and an inorganic fluorescent quantum dot phase. Through the method of self-emulsification, choose diisocyanate, glycol, hydrophilic chain extender, siloxane, fluorine-containing acrylic resin, etc. as raw materials to prepare water-based polyurethane emulsion with high transparency and good hardness, and then prepare it by hydrothermal method CdTe quantum dot aqueous solutions with different particle sizes, mix polyurethane emulsions with different CdTe quantum dot solutions in different proportions to obtain fluorescent water-based polyurethane emulsions, and finally add a cross-linking agent to cure the coating film to obtain water-based coatings with high performance. Fluorescent polyurethane coating. Through the design of polyurethane and the adjustment of the percentage of quantum dots added, a series of fluorescent paints with short drying time, excellent hydrophobicity, high hardness and strong adhesion to the substrate are obtained.

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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Patent Type & Authority Patents(China)
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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