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A preparation method of thermochromic luminescent polyurethane synthetic leather

A thermochromic, polyurethane technology, applied in chemical instruments and methods, layered products, lamination devices, etc., can solve the problems of uneven distribution, poor compatibility, easy migration and precipitation, etc., to increase compatibility and increase aesthetics Effects with fun, stable and long-lasting luminous properties

Active Publication Date: 2019-12-20
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for preparing thermosensitive color-changing luminescent polyurethane synthetic leather in view of the deficiencies in the prior art. The combination of the modified long-lasting luminescent material and the thermochromic capsule not only solves the problems of poor compatibility between the existing blended long-lasting luminescent material and polyurethane, easy migration and precipitation, and uneven distribution, but also endows the polyurethane with a durable Stable thermochromic luminescent properties; the polyurethane can absorb ultraviolet light and visible light, and its color can change reversibly with temperature during the day, and it can also emit bright light at night, and the luminous color can change with temperature. It is applied to synthetic leather, Can meet consumers' fashion pursuit and different application requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) 25 parts of long-lasting luminescent material SrAl 2 o 4 : Eu 2+ , Dy 3+ Add 5 parts of silane coupling agent KH-550 into the reaction flask, add a certain amount of absolute ethanol, adjust the pH value of the system to 4 with glacial acetic acid, stop the reaction at 70 °C for 6 h, cool and filter; use ammonia water and anhydrous Wash the filter cake with ethanol for many times, and then dry the product until the quality does not change, that is, the modified long-lasting luminescent material is obtained;

[0029] (2) Put the number average molecular weight of 2000 in the reactor after vacuum dehydration: 100 parts of polypropylene glycol, 23 parts of isophordione diisocyanate, 0.16 parts of antioxidant, 0.02 parts of organic bismuth catalyst, react at 80 ℃; wait for the system- When the NCO content reaches the theoretical value, add 27 parts of isophordione diisocyanate, 1,4 - 13 parts of butanediol, 8 parts of modified long-lasting luminescent material, and ...

Embodiment 2

[0033] (1) 15 parts of long afterglow luminescent material SrAl 2 o 4 : Eu 2+ , Dy 3+ Add 3 parts of silane coupling agent KH-550 into the reaction flask, add a certain amount of absolute ethanol, adjust the pH value of the system to 5 with glacial acetic acid, stop the reaction at 60 °C for 6 h, cool and filter; use ammonia water and anhydrous Wash the filter cake with ethanol for many times, and then dry the product until the quality does not change, that is, the modified long-lasting luminescent material is obtained;

[0034] (2) Put 80 parts of polyethylene glycol with a molecular weight of 4000 after vacuum dehydration into the reactor, 2,4 - 7 parts of toluene diisocyanate, 0.3 parts of antioxidant, 0.01 part of organic bismuth catalyst, react at 70 ° C; when the system -NCO content reaches the theoretical value, add in order 2,4 - 26 parts of toluene diisocyanate, 1,6 - 7 parts of hexanediol, 6 parts of modified long-lasting luminescent material, and 60 parts of bu...

Embodiment 3

[0038] (1) 20 parts of long-lasting luminescent material SrAl 2 o 4 : Eu 2+ , Dy 3+ Add 4 parts of silane coupling agent KH-550 into the reaction flask, add a certain amount of absolute ethanol, adjust the pH value of the system to 4.5 with glacial acetic acid, stop the reaction at 65 °C for 6 h, cool and filter; use ammonia water and anhydrous Wash the filter cake with ethanol for many times, and then dry the product until the quality does not change, that is, the modified long-lasting luminescent material is obtained;

[0039] (2) Put polyadipic acid with a number average molecular weight of 2000 after vacuum dehydration into the reactor- 1,4 - 30 parts of butanediol ester diol, 30 parts of polyethylene glycol with a number average molecular weight of 2000, 6 parts of isophordione diisocyanate, 6 parts of hexamethylene diisocyanate, 0.2 parts of antioxidant, organic silver catalyst 0.01 part, reacted at 85 ℃; when the -NCO content of the system reached the theoretical va...

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Abstract

The invention discloses a preparation method of temperature sensing color change luminous polyurethane synthetic leather. According to the method, firstly, a long afterglow luminous material is modified; groups capable of reacting with isocyanate are introduced to the surface of the luminous material; then, the modified long afterglow luminous material and a temperature sensing color change material are simultaneously introduced into a polyurethane coating; the problems that the matching of the blended compound long afterglow luminous material and polyurethane is poor, migration and precipitation easily occur, the distribution is nonuniform, and the like are solved; good temperature sensing color change luminous characteristics are given to the polyurethane coating. The polyurethane synthetic leather can absorb ultraviolet light and visible light; during visible light irradiation, the reversible color change is shown along with the temperature change; light energy is stored, and is released in a luminous form at night; the luminous color can change along the temperature change; the defects that the color of the existing luminous material is concentrated in the narrow wavelength range, the colors are single, and the aesthetic feeling is lacked are overcome; new designs and varieties are given to the synthetic leather product; the functionality of the synthetic leather is improved; the application field of the synthetic leather is expanded.

Description

technical field [0001] The invention belongs to the field of synthetic leather material technology and synthetic leather manufacture, and in particular relates to a preparation method of thermosensitive color-changing luminous polyurethane synthetic leather. Background technique [0002] In the polyurethane (PU) industry, the artificial leather produced with PU resin and base fabric is called PU synthetic leather, or synthetic leather for short. PU synthetic leather has the advantages of rich colors and various patterns, and its price is cheaper than leather fabrics. Decoration and other aspects play an irreplaceable role. As people's demand for high-performance, high-quality, high-environmental ecological synthetic leather continues to rise, synthetic leather products with a single performance can no longer meet people's needs. In recent years, functional Synthetic leather products are favored by consumers. [0003] Long afterglow luminescent materials can store the ener...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B37/10B32B37/12B32B38/16C08L75/06C08L75/08C08K9/10C08K3/24C08G18/32C08G18/42C08G18/44C08G18/48C08G18/66
CPCB32B37/10B32B37/12B32B38/164C08G18/3206C08G18/4238C08G18/4277C08G18/44C08G18/4825C08G18/4833C08G18/4854C08G18/6607C08G18/6674C08L75/06C08L75/08C08K9/10C08K3/24
Inventor 范浩军田赛琦文嘉婷陈意颜俊
Owner SICHUAN UNIV
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