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Thermo-sensitive dye microcapsule material, preparation method and thermo-sensitive coating

A technology of heat-sensitive dyes and microcapsules, which can be used in microcapsule preparations, microsphere preparation, fiber raw material processing, etc., and can solve problems such as lack of layering

Inactive Publication Date: 2021-12-10
湖南鼎一致远科技发展股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The above heating printing method is beneficial to simplify the structure of the printer, and the printing paper can keep the color for a long time without fading, but the disadvantage is that the printed image is actually composed of multiple colored microcapsules. Once the color of the capsule is developed, it will be fixed and consistent with each other, making the printed image more uniform in color and lacking a sense of hierarchy

Method used

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  • Thermo-sensitive dye microcapsule material, preparation method and thermo-sensitive coating

Examples

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preparation example Construction

[0052] The main difference between the technical solution provided by this application and the existing technical solution for preparing microcapsules is that the step of standing still is added. In the existing technical solution, shearing is expected to obtain microcapsules with a relatively uniform distribution. To solve the problem of lack of color scale in the color development of microcapsules, a standing step is set up to take advantage of the fact that the oil phase droplets have a tendency to repolymerize in the water phase, and through standing still, some of the small droplets formed by shearing are repolymerized , and enable the prepolymer in the water phase to fully react to obtain a wide and uniform distribution range of the cyst wall thickness.

[0053] In the step of vacuum distillation, the temperature of the emulsion can be controlled at 40° C. to 60° C. so as to speed up the speed of vacuum distillation without destroying the capsule wall of the microcapsules...

Embodiment 1

[0059] A method for preparing heat-sensitive paint, comprising the steps of:

[0060] Prepare oil phase raw materials: mix 5 parts by mass of o-hydroxymethylbenzoic acid lactone, 0.1 parts by mass of azobisisobutyronitrile and 50 parts by mass of methyl ethyl ketone, heat to 50°C, and stir for not less than 25 minutes until they are evenly stirred to obtain oil raw materials;

[0061] Configure the water phase raw material: mix 5 parts by mass of polyethylene glycol dimethacrylate, polycaprolactam, poly-N-isopropylacrylamide and polyethylene glycol block copolymer 1:1:1 mixture, 70 parts by mass of deionized water and 2 parts by mass of polyvinyl alcohol are raw materials in the aqueous phase;

[0062] Shear emulsification: add the water phase raw material to the oil phase raw material, use the Shanghai Huxie HR500 high-speed shearing machine produced by Shanghai Huxie to shear the mixture of the oil phase raw material and the water phase raw material, the shearing speed is 1...

Embodiment 2

[0066] Prepare the oil phase raw materials: mix 7 parts by mass of crystal violet lactone, 0.5 parts by mass of azobisisobutyronitrile and 50 parts by mass of butanone, heat to 50°C, and stir for not less than 25 minutes until uniformly stirred to obtain the oil phase raw materials;

[0067] Configure the water phase raw material: mix 10 parts by mass of polyethylene glycol dimethacrylate and a 1:1 mixture of polycaprolactam, 70 parts by mass of deionized water and 4 parts by mass of polyvinyl alcohol, in the water phase raw material;

[0068] Shear emulsification: add the water phase raw material to the oil phase raw material, use the Shanghai Huxie HR500 high-speed shearing machine produced by Shanghai Huxie to shear the mixture of the oil phase raw material and the water phase raw material, the shearing speed is 10000rpm, and the shearing speed is 10000rpm. Cut processing time is 1.5 hours, then let stand for 30 minutes;

[0069] Distillation under reduced pressure: Nitroge...

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Abstract

The invention provides a thermo-sensitive dye microcapsule material, a preparation method and a thermosensitive coating, and belongs to the technical field of inkless printing. The material comprises microcapsules composed of capsule walls and capsule cores, the capsule cores comprise thermosensitive dye, the D50 range of the microcapsules is 1-10 microns, and the distribution uniformity degree of the thickness of the capsule walls is 0.2-1 micron, so that the melting probability of the microcapsules in the ranges of 110-120 DEG C, 120-130 DEG C and 130-140 DEG C does not exceed 5%. The invention also provides the preparation method of the thermo-sensitive dye microcapsule material and the thermosensitive coating. According to the thermo-sensitive dye microcapsule material disclosed by the invention, the thickness distribution uniformity of the capsule wall of the thermosensitive dye microcapsule material ensures that the melting probability difference of the microcapsule in each temperature range does not exceed 5%, so that the thermosensitive dye microcapsule material can generate similar melting probability in each temperature range; and the thermal printer can be helped to change the color gradation of the printed pattern by changing the temperature as required.

Description

technical field [0001] The invention relates to the technical field of inkless printing, in particular to a thermosensitive dye microcapsule material, a preparation method and a thermosensitive coating. Background technique [0002] As a simple and convenient printing method, inkless printing provides technical support for the miniaturization and portability of printers. In the prior art, the technical scheme of inkless printing is to mix the microcapsules that encapsulate the dye and the initiator that causes the dye to develop color and coat them on the printing paper. The printer heats the printing paper to melt the capsule wall of the microcapsules, thereby The initiator penetrates the microcapsules and causes the dye to develop color, thereby developing the image on the printing paper. [0003] The above heating printing method is beneficial to simplify the structure of the printer, and the printing paper can keep the color for a long time without fading, but the disad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/54D21H21/28B01J13/14
CPCD21H21/54D21H21/28B01J13/14
Inventor 莫斌唐国初
Owner 湖南鼎一致远科技发展股份有限公司
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