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Temperature-sensitive color-changing agent as well as preparation method and application thereof

A temperature-sensitive color changing and temperature-sensitive color changing powder technology is applied in the field of temperature-sensitive color changing agent and its preparation, which can solve the problems of not fundamentally improving the quality of the microcapsule shell, and achieve mechanical extrusion resistance, good effect and chemical resistance. The effect of corrosion

Pending Publication Date: 2022-06-28
HUNAN AEROSPACE SANFENG SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Secondly, the quality of the microcapsule shell itself has not been fundamentally improved

Method used

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  • Temperature-sensitive color-changing agent as well as preparation method and application thereof
  • Temperature-sensitive color-changing agent as well as preparation method and application thereof
  • Temperature-sensitive color-changing agent as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Add 10kg of green thermochromic microcapsules with an average particle size of 1μm at 75°C and a shell thickness of 200nm into a double-cone mixer, extract the air into a vacuum state, and add 500g of hexamethyldisilazane to 100°C using a metering pump. 10g / min was added into the kettle at a constant speed through the atomizer under the running state of the mixer, fully contacted and reacted, stirred for 1 h after all added, and then distilled under vacuum and reduced pressure to remove low molecular weight for 0.5 h, and cooled to room temperature to obtain sample A spare.

Embodiment 2

[0069] Add 10kg of green thermochromic microcapsules with an average particle size of 5μm at 75°C and a shell thickness of 250nm into a double-cone mixer, extract the air into a vacuum state, and add 1500g hexamethyldisilazane to 50g using a metering pump after adding to 100°C. When the mixer is running and atomized by the atomizer at a constant speed, it is added into the kettle at a constant speed, and the reaction is fully contacted. After all the addition is added, it is stirred for 2 hours, and then the low molecules are distilled off under vacuum and reduced pressure for 0.5 hours, and cooled to room temperature to obtain sample B for use. .

Embodiment 3

[0071] Add 10kg of green thermochromic microcapsules with an average particle size of 5μm at 75°C and a shell thickness of 300nm into a double-cone mixer, extract the air into a vacuum state, and add 500g of dimethyldichlorosilane to 10g / m using a metering pump. min Under the running state of the stirrer and atomized by the atomizer, it was added to the kettle at a constant speed, and the reaction was fully contacted. After all the additions were added, the mixture was stirred for 1 h, and then the low molecules were distilled off under vacuum and reduced pressure for 0.5 h, and then cooled to room temperature to obtain sample C for use.

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Abstract

The invention relates to a temperature-sensitive color-changing agent and a preparation method and application thereof, and belongs to the field of fine chemical engineering technology and functional material preparation. The temperature-sensitive color-changing agent comprises temperature-sensitive color-changing powder and a modifier; the modifying agent is nitrogen-containing silane or chlorine-containing silane; the mass ratio of the thermochromic powder to the modifier is 1: (0.05-0.15). The temperature-sensing color-changing agent is subjected to surface treatment through hexamethyldisilazane or dimethyldichlorosilane, so that the capsule shell is more stable and more resistant to chemical corrosion and mechanical extrusion, and on the other hand, capsule powder obtained after surface treatment is more easily dispersed into silica gel. And if not treated, the color change function is lost in the product storage process or along with the increase of the use time.

Description

technical field [0001] The invention relates to a temperature-sensitive discoloration agent, a preparation method and application thereof, and belongs to the fields of fine chemical technology and functional material preparation. Background technique [0002] The wiring parts of power cables are often irregular in shape. Traditional insulating tapes, heat shrinkable tubes, junction boxes, insulating sheaths, etc. have poor insulation protection applicability for these parts, and it is impossible to quickly and directly judge the safety of this part. However, these The parts often face repeated repairs, which brings safety hazards to the repair workers who do not know the situation. [0003] When the electrical appliance is used beyond the safe current overload, the temperature of the power cable will rise, and the surface temperature of the cable will become higher and higher. If it is not dealt with in time, the consequences may be very serious. The long-term use of the po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C08K9/10C08K5/00C08K9/06
CPCC08L83/04C08K9/10C08K5/0041C08K9/06C08L2203/202
Inventor 崔武林邓国威殷波张刚
Owner HUNAN AEROSPACE SANFENG SCI & TECH CO LTD
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