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Fluorescent thermally expandable microcapsule, preparation method and application thereof

A technology of heat-expandable microcapsules and fluorescence, applied in the direction of microcapsule preparation, microsphere preparation, application, etc., to achieve the effect of broadening the application range, wide application field, and simple process

Active Publication Date: 2022-07-08
TANGSHAN KAILUAN CHEM TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, just presenting three-dimensional stereoscopic effects can no longer meet people's higher and higher requirements for printing inks, and people have put forward various functional requirements for printing inks

Method used

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  • Fluorescent thermally expandable microcapsule, preparation method and application thereof
  • Fluorescent thermally expandable microcapsule, preparation method and application thereof
  • Fluorescent thermally expandable microcapsule, preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0058] The embodiment of the present invention provides a fluorescent thermal expansion microcapsule, and the preparation method includes the following steps:

[0059] Step 1, under nitrogen protection, add 28.0g isopentane foaming agent and 25.0g methane dicyclohexyl diisocyanate into the there-necked flask, then add 220mL deionized water, 12mL acetone and 2.25g hexadecyltrimethyl Ammonium bromide was continuously stirred at room temperature at a speed of 550rpm for 2h to obtain a stable oil-in-water emulsion;

[0060] Step 2: Add 44.5g of trifunctional long-chain polyetheramine with a molecular weight of 5000-8000 g / mol and 100mL of deionized water into a single-necked bottle, mix well, then add 0.25g of ammonium chloride, stir until completely dissolved, and obtain Wall material emulsion; under the condition of continuous stirring, the oil-in-water emulsion is heated to 60°C, and then the wall material emulsion is added dropwise for 1 h. After the dropwise addition, the sam...

Embodiment 2

[0068] The embodiment of the present invention provides a fluorescent thermal expansion microcapsule, and the preparation method includes the following steps:

[0069] Step 1. Under nitrogen protection, add 30.0g n-heptane foaming agent and 26.5g diphenylmethane diisocyanate into the there-necked flask, then add 230mL deionized water, 15mL acetone and 2.5g octadecyldimethylbenzyl base ammonium chloride, stirring continuously for 2 h at a speed of 600 rpm at room temperature to obtain a stable oil-in-water emulsion;

[0070] Step 2: Add 40.8g of trifunctional long-chain polyetheramine with a molecular weight of 5000-8000 g / mol and 100mL of deionized water into a single-necked bottle, mix well, then add 0.2g of ammonium chloride, stir until completely dissolved, and obtain wall material emulsion; under the condition of continuous stirring, the oil-in-water emulsion was heated to 60°C, and then the wall material emulsion was added dropwise for 1.5 h. Filter, wash with deionized ...

Embodiment 3

[0076] The embodiment of the present invention provides a fluorescent thermal expansion microcapsule, and the preparation method includes the following steps:

[0077] Step 1, under nitrogen protection, add 28.0g isooctane foaming agent and 25.0g methane dicyclohexyl diisocyanate into the there-necked flask, then add 220mL deionized water, 12mL acetone and 2.25g dodecyl dimethyl Benzylammonium chloride was continuously stirred at room temperature at a speed of 550rpm for 2h to obtain a stable oil-in-water emulsion;

[0078] Step 2: Add 44.5g of trifunctional long-chain polyetheramine with a molecular weight of 5000-8000 g / mol and 100mL of deionized water into a single-necked bottle, mix well, then add 0.25g of ammonium chloride, stir until completely dissolved, and obtain Wall material emulsion; under the condition of continuous stirring, the oil-in-water emulsion is heated to 60°C, and then the wall material emulsion is added dropwise for 1 h. After the dropwise addition, the...

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Abstract

The invention relates to the technical field of thermal expansion microcapsules, and specifically discloses a fluorescent thermal expansion microcapsule and a preparation method and application thereof. The microcapsules include a capsule core and a capsule wall, the capsule core is a low-boiling alkane foaming agent, and the capsule wall sequentially includes a cross-linked polyurea buffer layer, a fluorescent agent-acrylate copolymer composite layer and an interpenetrating network from the inside to the outside. Cross-linked acrylate copolymer protective layer. The preparation method is as follows: using the emulsion template method to realize the coating of the inner shell layer of the low-boiling alkane foaming agent with polyurea through the interfacial polycondensation reaction, and then using the emulsion template self-assembly technology to carry out surface radical polymerization, respectively, on the inner shell layer of the polyurea. The surface is coated with the middle layer of the fluorescent agent-acrylate copolymer and the outer protective shell layer of the interpenetrating network cross-linked acrylate copolymer. The thermally-expandable microcapsule of the present invention can produce two functions of 3D stereo vision / tactile effect and fluorescent indication when applied to ink printed matter, and is very suitable for application in the fields of anti-counterfeiting materials, special markers, fluorescent road signs and the like.

Description

technical field [0001] The invention relates to the technical field of thermal expansion microcapsules, in particular to a fluorescent thermal expansion microcapsule and a preparation method and application thereof. Background technique [0002] With the continuous development of the national economy and the continuous improvement of people's living standards, people's pursuit of high-quality decorative prints is also constantly improving. Specialty printing materials with 3D visual effects are receiving more and more attention. Microcapsules refer to a kind of micro-containers or embeddings with natural or synthetic polymer wall shells, and the general particle size is in the range of micrometers or millimeters. Thermal expansion microcapsule technology is a technology in which a low-boiling organic solvent is used as a foaming agent in a thermoplastic polymer shell. When this type of microcapsule is heated, the internal organic solvent is vaporized to generate pressure, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J13/14
CPCC09D11/50B01J13/14C08F220/14C08F220/1804C08F222/102C08F220/325C08F222/103
Inventor 刘莉莉李建华王亚涛董森王志彦郭学华
Owner TANGSHAN KAILUAN CHEM TECH CO LTD