Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Photochromic polyester material and preparation method thereof

A polyester material, photochromic technology, applied in the direction of color-changing fluorescent materials, chemical instruments and methods, etc., can solve the problems of high addition amount of photochromic microcapsules, low spiropyran content, and indistinct color changes, etc. Better photochromic effect and higher fiber washing fastness

Active Publication Date: 2022-02-08
WUHAN TEXTILE UNIV
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main methods for preparing organic photochromic polyester materials are as follows: 1) Melt blending method is adopted, that is, directly blending and melting photochromic materials and polymers, or dispersing photochromic materials in energy and polymer The method of making luminescent masterbatch in the resin carrier mixed with the material, and then mixed into the high polymer for melting, but the photochromic material is easy to agglomerate in the polyester matrix, and the dispersion is poor
2) The coating method is adopted, that is, the photochromic material is dispersed in an appropriate solvent, and then mixed with a binder such as a resin liquid to make a luminescent color paste, and then coated on the surface of the polyester material, but the prepared polyester product It is easy to fall off after washing, so that the luminous performance will decline and the service life will be shortened
3) The photochromic microcapsules of the spiropyran class are blended with the low melting point polyester material, but the spiropyran content of the photochromic polyester material prepared by it is low, and the addition amount of the photochromic microcapsules is high, The color change is not bright, the color fastness is poor and other shortcomings, so its application is limited
However, the disadvantage of this method is that it is limited to the preparation of photochromic fiber products, the types of polyester products are limited, and the photochromic effect is not significantly improved.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Photochromic polyester material and preparation method thereof
  • Photochromic polyester material and preparation method thereof
  • Photochromic polyester material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0033] see figure 1 As shown, the invention provides a kind of preparation method of photochromic polyester material, comprises the steps:

[0034] S1. Preparation of dual-active spirooxazine materials:

[0035] S11. Dissolve methyl isopropyl ketone and p-methylphenylhydrazine in ethanol according to a predetermined molar ratio to obtain a first mixed solution, and add concentrated sulfuric acid dropwise to the first mixed solution, at 75-85°C Reacting in an oil bath for 3.0 to 4.5 hours; then adding NaOH solution dropwise to the first mixed solution to make it alkaline, and performing extraction and distillation treatment to prepare indole;

[0036] S12. Change CH 3 CH 2 I and the indole prepared in step S11 were dissolved in ethanol and mixed uniformly, placed in an oil bath at 75-85°C for reflux reaction for 2-4 hours, and purified to obtain an intermediate product; the intermediate product was dissolved in ethanol, and added A predetermined amount of 1-nitroso-2,7-dihydr...

Embodiment 1

[0049] S1. Preparation of dual-active spirooxazine materials:

[0050] Slowly add 1 mol of methyl isopropyl ketone distilled under atmospheric pressure into 1 mol of p-methyl phenylhydrazine, use ethanol as a solvent, add the catalyst concentrated sulfuric acid dropwise within 30 minutes, and react in an oil bath at 80°C for 4 hours, After the reaction is complete, NaOH solution is added dropwise until alkaline, then extracted with anhydrous ether, filtered with suction, and distilled under reduced pressure to obtain indole;

[0051] CH 3 CH 2 I was added to the prepared indole in a molar mass ratio of 1: 0.8, dissolved in absolute ethanol and mixed uniformly, refluxed in an oil bath at 80°C for 3 hours, cooled for crystallization, filtered, and purified by recrystallization to obtain an intermediate product; The intermediate product was dissolved in ethanol, 1-nitroso-2,7-dihydroxynaphthalene with the same molar mass as the intermediate product was added, refluxed in an oil...

Embodiment 2-4

[0062] The difference from Example 1 is that the molar ratio of bishydroxyethyl terephthalate to the bisactive spirooxazine material is different, and the other steps are the same as in Example 1, and will not be repeated here.

[0063] Table 1 is the setting of the molar ratio of bishydroxyethyl terephthalate and bisactive spirooxazine materials in Examples 1-4

[0064]

[0065] Embodiment 1-4 is analyzed in conjunction with Table 1: The influence of the molar ratio change of bishydroxyethyl terephthalate and bisactive spirooxazine material on the photochromic polyester material prepared by the present invention is: The molar ratio of hydroxydiethyl ester to the dual-active spirooxazine photochromic material ranges from 1:0.5% to 20%, and different proportions of spirooxazine materials are added to prepare spirooxine with different color depths and color fastnesses. Azinoid photochromic polyester material.

[0066] The higher the ratio of the dual-active spirooxazine mate...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a photochromic polyester material and a preparation method thereof. First, dissolve methyl isopropyl ketone and p-methyl phenylhydrazine in ethanol, add concentrated sulfuric acid dropwise and react in an oil bath to prepare indole; then, dissolve CH3CH2I and indole in ethanol and mix well, The oil bath reflux reaction obtains an intermediate product; and 1-nitroso-2,7-dihydroxynaphthalene is added, and the oil bath refluxes to prepare a dual-active spirooxazine material; then, terephthalic acid and ethylene glycol are mixed, And add antimony trioxide and phenyl triphosphate to carry out esterification reaction to obtain bishydroxyethyl terephthalate; finally, mix bishydroxyethyl terephthalate with bisactive spirooxazine material to carry out polycondensation reaction , to prepare a photochromic polyester material. The present invention grafts the dihydroxy active spirooxazine material onto the main chain of the polyethylene terephthalate polymer, so that the prepared photochromic polyester material has remarkable photochromic effect and high color fastness. excellent.

Description

technical field [0001] The invention relates to the field of material preparation, in particular to a photochromic polyester material and a preparation method thereof. Background technique [0002] Photochromic polyester materials have important application prospects in high-tech fields such as high-density information storage, optical computing, and information display. At present, the main methods for preparing organic photochromic polyester materials are as follows: 1) Melt blending method is adopted, that is, directly blending and melting photochromic materials and polymers, or dispersing photochromic materials in energy and polymer The method of making luminescent masterbatch in the resin carrier mixed with the material, and then mixed into the high polymer for melting, but the photochromic material is easy to agglomerate in the polyester matrix, and the dispersibility is poor. 2) The coating method is adopted, that is, the photochromic material is dispersed in an appr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/685C08G63/86C08G63/87C09K9/02
CPCC08G63/6856C08G63/866C08G63/87C09K9/02C09K2211/1475
Inventor 王栋赵青华毛秦岑王雯雯宋银红尤海宁吴建美
Owner WUHAN TEXTILE UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com