Microencapsulated photochromic powder resistant to weather for long time and preparation method thereof

A microencapsulation and photochromic technology, applied in microcapsule preparation, microsphere preparation, dyeing method, etc., can solve the problems of poor weather resistance and acid resistance of single-layer microencapsulated photochromic powder

Active Publication Date: 2018-08-31
TIANJIN UVOS TECH CO LTD +1
View PDF10 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the technical problem of poor weather resistance and acid resistance of the existing single-layer microencapsulated photochromic powder, and to provide a method of encapsulating light stabilize

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
  • Microencapsulated photochromic powder resistant to weather for long time and preparation method thereof
  • Microencapsulated photochromic powder resistant to weather for long time and preparation method thereof
  • Microencapsulated photochromic powder resistant to weather for long time and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0109] Long weather resistance microencapsulated photochromic powder, including the following components:

[0110]

[0111] MOCA: English name 3,3,-dichloro-4,4,-diamino-diphenylmethane.

[0112] The photochromic compound dye is spirooxazine (Nankai University Fine Chemical Experimental Factory, melting point 145° C., decomposition temperature 260° C.).

[0113] The preparation method of the long weather-resistant microencapsulated photochromic powder is:

[0114] 1) Preparation of core material: Add photochromic material, light stabilizer, and crosslinking agent to the organic solvent according to the weight ratio, heat to 140°C, stir to dissolve, cool down to below 20°C, add water-based isocyanate prepolymer into the cooling material, fully stirred evenly to obtain a core material solution.

[0115] 2) Emulsification: add the core material solution to an appropriate amount of 3% neutral emulsifier solution, emulsify at a low speed for a certain period of time, and contr...

Embodiment 2

[0123] Long weather resistance microencapsulated photochromic powder, including the following components:

[0124]

[0125] The photochromic compound is selected from quinolino-spirooxazine photochromic compounds.

[0126] The above-mentioned preparation method of long weather-resistant microencapsulated photochromic powder comprises the following steps:

[0127] 1) Core material preparation: add photochromic material, light stabilizer, polyester polyol, and crosslinking agent to the organic solvent according to the weight ratio, heat to 120°C, stir to dissolve, cool down to below 20°C, and water-based The isocyanate prepolymer is added into the cooling material, and fully stirred evenly to obtain a core material solution.

[0128] 2) Emulsification: add the core material solution to an appropriate amount of 3% neutral emulsifier solution, emulsify at a low speed for a certain period of time, and control the emulsification temperature at 20-25°C to obtain an O / W emulsion w...

Embodiment 3

[0136] The long weather-resistant microencapsulated photochromic powder of the present embodiment 3 comprises the following components:

[0137]

[0138] The photochromic compound is selected from aryl-substituted naphthopyran photochromic compound.

[0139] The above-mentioned preparation method of long weather-resistant microencapsulated photochromic powder comprises the following steps:

[0140] 1) Core material preparation: add photochromic material, light stabilizer, polyester polyol, and crosslinking agent to the organic solvent according to the weight ratio, heat to 130°C, stir to dissolve, cool down to below 20°C, and water-based The isocyanate prepolymer is added into the cooling material, and fully stirred evenly to obtain a core material solution.

[0141] 2) Emulsification: add the core material solution to an appropriate amount of 3% neutral emulsifier solution, emulsify at a low speed for a certain period of time, and control the emulsification temperature at...

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

PropertyMeasurementUnit
Particle sizeaaaaaaaaaa
Melting pointaaaaaaaaaa
Solution temperatureaaaaaaaaaa
Login to view more

Abstract

The invention relates to the field of photochromic materials and particularly provides microencapsulated photochromic powder resistant to weather for a long time. The powder has a polyurethane/melamine resin double-layer microcapsule shell, and the shell is filled with photochromic materials and a stabilizer. By using a neutral system of in-situ polymerization of polyurethane, the alkaline light stabilizer and the photochromic materials are packaged together into a polyurethane microcapsule to form a polyurethane-coated transparent microcapsule. After that, the pH of an emulsion is adjusted tobe acidic, and a melamine resin prepolymer is added to finally obtain the microencapsulated photochromic powder resistant to weather for a long time, so that the weather resistance is improved by five times or above, and the acid resistance is also improved by several times. By using the photochromic powder for preparing clothes printed and dyed by printing slurry, the color change service life is increased by ten times or above, the weather resistance and acid resistance are improved, and meanwhile the original micron-level particle size, excellent dispersibility, amphiphilic solubility withdifferent kinds of slurry and full color rendering performance of the photochromic powder are also maintained.

Description

technical field [0001] The invention relates to the field of photochromic materials, in particular to a long weather-resistant microencapsulated photochromic powder and a preparation method thereof. Background technique [0002] Photochromic materials have the characteristics of sensitive color change and bright color, but they are easily affected by environmental factors such as temperature, light, pH value and oxygen, resulting in oxidative deterioration and poor fatigue resistance. The earliest and easiest way to combine photochromic materials with fabrics is printing and dyeing techniques. This technology makes the photochromic material directly exposed to the external environment, resulting in shortened discoloration life and failure of discoloration performance. With the rapid development of microcapsule technology, the photochromic material is coated inside the transparent microcapsule to separate it from air, impurities, acid and alkali chemical environments, and im...

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
IPC IPC(8): D06P1/44B01J13/18
CPCB01J13/185D06P1/445
Inventor 吴边鹏孟继本张丽鑫边俊民
Owner TIANJIN UVOS TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap