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Preparation process of water-based fluorescent polyurethane compound

A preparation process, polyurethane technology, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of high solid content and viscosity of fluorescent polyurethane emulsion, insufficient fluorescence intensity, etc., and achieve long storage stability, high solid content, fluorescence The effect of superior performance

Active Publication Date: 2016-06-22
山东画漫天装饰有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The Chinese patent application with the publication number CN104177585A discloses a preparation method of fluorescent polyurethane emulsion. Firstly, a polyurethane prepolymer is prepared, reacted with a salt-forming agent to form a polyurethane dispersion, and then emulsified, and a small molecule fluorescent material is added at the same time. Fluorescent polyurethane emulsion is prepared. The solid content and viscosity of the fluorescent polyurethane emulsion are high, and the fluorescence quantum yield is 0.9. It is suitable for printing and dyeing, paint, leather, plastics and other industries, but the fluorescence intensity is insufficient.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A kind of preparation technology of aqueous fluorescent polyurethane compound, comprises the following steps:

[0018] (1) In parts by weight, heat 30 parts of polypropylene glycol 2000 and 2 parts of dimethylol propionic acid to 100°C, and dehydrate for 2 hours under the condition of vacuum degree ≤0.1MPa; use 4A molecular sieves for acetone and triethylamine dehydrated, spare;

[0019] (2) Add the dehydrated polypropylene glycol 2000 and dimethylol propionic acid into a three-necked flask, pass through nitrogen protection and heat to 70°C, slowly drop in 10 parts of toluene diisocyanate and 10 parts of acetone, and then add 0.01 parts of Dibutyltin laurate, keep the reaction for 2h; use di-n-butylamine back titration during the reaction, so that the free isocyanate concentration is 3-5%;

[0020] (3) Lower the temperature in the three-necked flask to 40°C, add 2 parts of triethylamine for neutralization, the degree of neutralization is 100%, and react for 0.5h;

[0...

Embodiment 2

[0024] A kind of preparation technology of aqueous fluorescent polyurethane compound, comprises the following steps:

[0025] (1) In parts by weight, heat 40 parts of polypropylene glycol 2000 and 4 parts of dimethylol propionic acid to 120°C and dehydrate for 2.5 hours under the condition of vacuum degree ≤ 0.1MPa; 20 parts of 1.1.2.2- Tetrakis(4-hydroxyphenyl)ethylene was heated to 50°C, and dehydrated for 2.5 hours; acetone and triethylamine were dehydrated with 4A molecular sieve, and set aside;

[0026] (2) Add dehydrated polypropylene glycol 2000 and dimethylol propionic acid into a three-necked flask, pass through nitrogen protection and heat to 75°C, slowly drop 15 parts of toluene diisocyanate and 20 parts of acetone, and then add 0.02 parts of Dibutyltin laurate, keep the reaction for 3 hours; then add 20 parts of 1,1,2,2-tetrakis(4-hydroxyphenyl)ethylene, keep the temperature constant, and make the second reaction for 2 hours. During the second reaction, di-n-butyl ...

Embodiment 3

[0031] A kind of preparation technology of aqueous fluorescent polyurethane compound, comprises the following steps:

[0032] (1) In parts by weight, heat 60 parts of polypropylene glycol 2000 and 7 parts of dimethylol propionic acid to 140°C, and dehydrate for 3 hours under the condition of vacuum degree ≤0.1MPa; 30 parts of 1.1.2.2-4 (4-Hydroxyphenyl)ethylene was heated to 70°C, and dehydrated for 3 hours; acetone and triethylamine were dehydrated with 4A molecular sieve, and set aside;

[0033] (2) Add the dehydrated polypropylene glycol 2000 and dimethylol propionic acid into a three-necked flask, pass through nitrogen protection and heat to 90°C, slowly drop 15 parts of toluene diisocyanate and 20 parts of acetone, and then add 0.03 parts of Dibutyltin laurate, keep the reaction for 4h; then add 30 parts of 1,1,2,2-tetrakis(4-hydroxyphenyl)ethylene, keep the temperature constant, and do the second reaction for 2h. During the second reaction, di-n-butyl Amine back titrati...

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Abstract

The invention discloses a preparation process of a water-based fluorescent polyurethane compound. The preparation process includes the following steps that all components are dehydrated for use; dehydrated polypropylene glycol 2000 and dimethylolpropionic acid are added into a three-mouth flask and heated under protection of nitrogen gas, toluene diisocynate and acetone are dropwise added, then dibutyltin dilaurate is added, a reaction is conducted, and in the reaction process, back titration is conducted with di-n-butylamine; the temperature is lowered to 40-50 DEG C, triethylamine is added, and a reaction is conducted; the temperature is lowered to room temperature, triethylamine and ethidene diamine are added, emulsification and reduced pressure distillation are conducted, and the water-based fluorescent polyurethane compound is obtained. The prepared water-based fluorescent polyurethane compound is high in solid content, high in storage stability, high in fluorescence quantum yield and excellent in fluorescence property.

Description

technical field [0001] The invention relates to a polymer fluorescent material, in particular to a preparation process of a water-based fluorescent polyurethane compound. Background technique [0002] Fluorescent materials are divided into inorganic fluorescent materials and organic fluorescent materials. Fluorescent materials have the characteristics of strong light absorption capacity, high conversion efficiency, wide emission band distribution area, and long fluorescence lifetime. Water-based polyurethane has the characteristics of high hardness, strong adhesion, corrosion resistance, good solvent resistance, low volatile organic compound (VOC) content, and is easy to use. The preparation of water-based fluorescent polyurethane can embed fluorescent materials in water-based polyurethane to achieve fluorescent effects, making water-based polyurethane more widely used, such as road surfaces, manhole covers on urban streets, lampposts, etc. [0003] "Preparation and Fluores...

Claims

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Application Information

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IPC IPC(8): C08G18/67C08G18/66C08G18/48C08G18/34C08G18/32C08G18/12C09K11/06
CPCC08G18/0823C08G18/12C08G18/3228C08G18/348C08G18/48C08G18/6685C08G18/6692C08G18/675C09K11/06C09K2211/1425C09K2211/1433
Inventor 盛建国童何兵徐卉
Owner 山东画漫天装饰有限公司
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