Environmentally friendly fluorescent waterborne polyurethane and preparation method thereof

A water-based polyurethane, environment-friendly technology, applied in the field of environment-friendly fluorescent water-based polyurethane and its preparation, can solve the problems of pollution, human poisoning to the environment, unstable content, etc., and achieve the effect of reducing environmental pollution

Active Publication Date: 2015-12-30
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the application of blended fluorescent water-based or oil-based polyurethane, the fluorescent small molecules tend to fall off easily, have poor compatibility with the resin substrate, and the distribution is uneven and the content is unstable, thus affecting the luminous performance.
In addition, the additives added during the blending process often have a negative impact on the original good properties of the resin
A large amount of solvent is used in the blending process. After the coating film is formed, the solvent used volatilizes into the air, causing toxicity to the human body and pollution to the environment, as well as a waste of resources.

Method used

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  • Environmentally friendly fluorescent waterborne polyurethane and preparation method thereof
  • Environmentally friendly fluorescent waterborne polyurethane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034](1) 100 parts of polypropylene glycol with a number average molecular weight of 2000, 48 parts of isophordione diisocyanate, 1,4 - 4 parts of butanediol and 0.02 parts of dibutyltin laurate are added to the reaction vessel, and the temperature is raised to 85°C for 3 hours to prepare the prepolymer under continuous stirring;

[0035] (2) Add 8 parts of dimethylolpropionic acid and 10 parts of acetone to the obtained prepolymer, and maintain the reaction at 85°C for 2 hours to obtain a prepolymer with hydrophilic groups;

[0036] (3) Add 1 part of fluorescent agent and 20 parts of acetone to the prepolymer obtained in (2), and continue to react at 85°C for 2 hours in a nitrogen atmosphere to obtain a prepolymer containing a fluorescent chain extender;

[0037] (4) Use 6 parts of triethylamine to neutralize the prepolymer, and under the action of high shear force, disperse the prepolymer in 373 parts of deionized water, stir for 1 hour, remove acetone under reduced pressur...

Embodiment 2

[0039] (1) 80 parts of polyethylene glycol with a number average molecular weight of 4000, 2,4 - 35 parts of toluene diisocyanate, 1,6 - 8 parts of hexanediol and 0.01 part of stannous octoate were added to the reaction vessel, and the temperature was raised to 75°C for 3 hours under continuous stirring to prepare the prepolymer;

[0040] (2) Add 8 parts of dimethylol butyric acid and 15 parts of butanone to the obtained prepolymer, and maintain the reaction at 75°C for 3 hours to obtain a prepolymer with a block structure;

[0041] (3) Add 0.5 parts of fluorescent agent and 10 parts of butanone to the prepolymer obtained in (2), and continue to react at 75°C for 2 hours to obtain a prepolymer containing fluorescent chain extender;

[0042] (4) Use 5.5 parts of triethylamine to neutralize the prepolymer, and under the action of high shear force, disperse the prepolymer in 243 parts of deionized water, stir for 1 hour, remove butanone under reduced pressure for reuse, and obta...

Embodiment 3

[0044] (1) 100 parts of polycarbonate diol with a number average molecular weight of 3000, 10 parts of isophordione diisocyanate, 25 parts of hexamethylene diisocyanate, 1,4 - 3 parts of butanediol, 3 parts of diethylene glycol and 0.01 part of dimethylcyclohexylamine, with continuous stirring, the temperature was raised to 80°C for 3 hours to prepare a prepolymer;

[0045] (2) Add 7 parts of dimethylolsulfonate with a molecular weight of 1000 and 10 parts of methyl ethyl ketone to the obtained prepolymer, and maintain the reaction at 80°C for 2.5 hours to obtain a prepolymer with hydrophilic groups;

[0046] (3) Add 1.5 parts of fluorescent agent and 30 parts of methyl ethyl ketone to the prepolymer obtained in (2), and continue to react at 80°C for 2.5 hours under the protection of nitrogen atmosphere to obtain a prepolymer containing fluorescent chain extender;

[0047] (4) Use 5.5 parts of triethylamine to neutralize the prepolymer, and under the action of high shear force...

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Abstract

The invention discloses environmentally friendly fluorescent waterborne polyurethane and a preparation method thereof. A hydroxyl-terminated compound containing a fluorescent group is used as a chain extender and undergoes a reaction with isocyanate, then the product is embedded in a waterborne polyurethane structure unit in a chemical bond way, and thus the problems that a co-blended compound fluorescent agent has poor compatibility with waterborne polyurethane and is easy to migrate and precipitate in a use process are solved. The used fluorescent agent of the fluorescent waterborne polyurethane has less amount, influence on the original excellent properties of polyurethane is smaller, fluorescence properties are stable and persistent, and fluorescent chromophores are distributed evenly in polyurethane; water is used for replacing an organic solvent, and organic solvent pollution is eliminated from the source, so that the fluorescent waterborne polyurethane has environmental friendliness; and the synthetic process is easy to control, the performance is easy to adjust, and the fluorescent waterborne polyurethane can be widely applied in leather coating finish, synthetic leather coating layers, building materials, coatings, medical products, textiles and other industries.

Description

technical field [0001] The invention belongs to the technical field of polymer material synthesis, and in particular relates to an environment-friendly fluorescent water-based polyurethane and a preparation method thereof. Background technique [0002] Water-based polyurethane uses water as the dispersion medium. It not only has the excellent properties of solvent-based polyurethane such as friction resistance, high strength, and low-temperature flexibility, but also has the advantages of non-toxicity, low odor, and high production safety. It has been widely used in leather finishing and synthetic materials. Leather manufacturing, building insulation materials, fabric coating, coatings, adhesives and medical industries. [0003] With the continuous improvement of people's living standards, consumers are increasingly pursuing novelty and beauty of products. Combining fluorescent agents with water-based polyurethane can endow products with new varieties of designs and colors, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/32C08G18/12C08G18/08
CPCC08G18/0823C08G18/12C08G18/6625C08G18/6659C08G18/6692C08G18/3857
Inventor 范浩军田赛琦陈意颜俊章培昆石碧
Owner SICHUAN UNIV
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