Fluorescent waterborne polyurethane based on chromophore in dihydric alcohol and preparation method thereof

A water-based polyurethane, fluorescent technology, applied in luminescent materials, chemical instruments and methods, etc., can solve problems such as exudation, migration, and deterioration of material fluorescence, and achieve the effects of uniform distribution, difficult migration, and enhanced fluorescence intensity.

Active Publication Date: 2013-08-21
UNIV OF SCI & TECH OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

What is obtained by this preparation method is actually a mixture. Due to the compatibility of the small molecule pigment or dye with the organic polymer polyurethane, problems such as migration in the mixture material and oozing out of the material will occur during use. , resulting in poor fluorescence of the material

Method used

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  • Fluorescent waterborne polyurethane based on chromophore in dihydric alcohol and preparation method thereof
  • Fluorescent waterborne polyurethane based on chromophore in dihydric alcohol and preparation method thereof
  • Fluorescent waterborne polyurethane based on chromophore in dihydric alcohol and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] 110 grams of dimethyl sulfoxide, 30.5 grams of potassium carbonate, 13.9 grams of diethanolamine and 1.0 grams of sodium iodide were put into a three-necked flask, and 5 grams of 9-chloromethyl anthracene and 15 grams of dimethyl anthracene were added dropwise under magnetic stirring. The solution formed by sulfone was heated to 80°C, kept for 2 hours, then added 300 grams of water, filtered to obtain a precipitate, and recrystallized with ethyl acetate and anisole (volume ratio: 1:1) to obtain the fluorescent diol DEAA, structural formula for:

[0057]

[0058] Mix 50 grams of PPG (M n =2000) into a 500mL three-neck flask, dehydrated at 110°C for 1 hour and then cooled to 50°C. Take 12.90 grams of TDI into a three-necked flask, stir and react at 80°C for 2 hours, then add 1.33 grams of the above-prepared fluorescent diol DEAA, 4 grams of DMPA, 0.50 grams of DEG, 0.02 grams of DBTDL and 50.00 grams of butanone, and keep the temperature at 70°C After stirring and re...

Embodiment 2

[0060] Add 13.00 grams of 9-chloromethylanthracene and 100 milliliters of acetone into a 250-mL three-neck flask, add 7.92 grams of potassium carbonate and 18.00 grams of dimethyl 5-hydroxyisophthalate, heat up to 56°C under magnetic stirring, and reflux for 30 hours , cooled to 20°C, filtered to obtain the filtrate, distilled under reduced pressure to remove acetone, washed with methanol three times, and dried in vacuo to obtain an ether solid;

[0061] Mix 4.32 grams of lithium aluminum hydride and 30 milliliters of tetrahydrofuran at 0°C to form a suspension, add dropwise a tetrahydrofuran solution (100 g / L) of ether solids to the suspension, react at room temperature for 10 hours after the addition is complete, and add a small amount of Stir the water for 10 minutes after no gas is generated, filter to obtain the filtrate, distill under reduced pressure to remove the solvent, recrystallize with n-hexane, filter and vacuum-dry to constant weight to obtain the fluorescent dio...

Embodiment 3

[0065] Weigh 2.0 grams of 9-anthracene formic acid into a one-necked flask, add 40 grams of dichloromethane as a solvent under magnetic stirring conditions until the 9-anthracene formic acid is completely dissolved, add 3 grams of oxalyl chloride dropwise to the one-necked flask, and then add 0.02 grams of N,N'-Dimethylformamide, react at 20°C for 5 hours, then add 30 grams of n-hexane to the system, and distill under reduced pressure to remove n-hexane (oxalyl chloride will be taken out when distilling n-hexane under reduced pressure), Repeated three times to obtain intermediate 1;

[0066] Add 10 grams of dichloromethane in the obtained intermediate 1 to obtain the dichloromethane solution of intermediate 1, dissolve 2.52 grams of diethanolamine in 20 grams of dichloromethane to obtain the dichloromethane solution of diethanolamine, and then the intermediate The dichloromethane solution of 1 was added dropwise to the dichloromethane solution of diethanolamine, and reacted at...

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Abstract

The invention discloses fluorescent waterborne polyurethane based on chromophore in dihydric alcohol and a preparation method thereof. The fluorescent waterborne polyurethane is generated by utilizing the fluorescent dihydric alcohol containing the fluorescent chromophore to be reacted with diisocyanate and hydrophilic chain-extender. When the dihydric alcohol containing the fluorescent chromophore forms the fluorescent waterborne polyurethane latex, since the fluorescent chromophore is already chemically keyed into a polyurethane molecular chain, the fluorescent intensity is greatly enhanced, and a typical fluorescent enhanced effect can be displayed. The fluorescent chromophore is uniformly distributed in the polyurethane, the content is controllable, the chromophore is difficult to migrate, the fluorescence can be stored for a long time, the generated fluorescent waterborne polyurethane adopts the water as a solvent, so that safety in transportation and use can be realized, the environment is not polluted, only the low-boiling-point organic solvent such as acetone and butanone is used in the production process, and the solvent is easy to recover.

Description

1. Technical field [0001] The invention belongs to the technical field of water-based polyurethane materials, in particular to fluorescent water-based polyurethane formed from diols with fluorescent chromophores and a preparation method thereof. 2. Background technology [0002] Waterborne polyurethane has the advantages of safe production, transportation and use, and does not pollute the environment. With the enhancement of people's awareness of environmental protection and energy conservation, especially the strict restrictions on the content of volatile organic compounds in coatings and other product systems in various countries' environmental protection regulations, waterborne polyurethane is used in coatings. , Adhesives and leather finishing agents and other fields of application are getting more and more attention. With the demand for water-based polyurethane materials with new functions in production and life, adding functionality to water-based polyurethane can grea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/32C08G18/10C09K11/06
Inventor 张兴元李军配贺晨周静李发萍
Owner UNIV OF SCI & TECH OF CHINA
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