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Multiple reversible color change microcapsule anti-counterfeiting material and preparation method and application thereof

A microcapsule and multiple technology, applied in microcapsule preparations, color-changing fluorescent materials, luminescent materials, etc., can solve the problems of limited application range, single function, oily temperature-changing inks that cannot be miscible with water, etc.

Inactive Publication Date: 2010-06-09
张世智
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to its high price, single function, and no multiple anti-counterfeiting functions, the scope of application is generally limited. Due to the disadvantage of being easy to be counterfeited, it is mainly used for anti-counterfeiting products with small areas or small trademarks and the anti-counterfeiting requirements are not very high.
Secondly, oil-based temperature-changing ink (solvent-based) is not miscible with water and cannot be used for water-based coating. There are a large number of solvents in the ink that are toxic to health, especially to the respiratory tract. The requirements for fire and explosion protection in the operating place are very high, and it is harmful to the environment. adverse effects
Therefore, oily temperature-changing materials (solvent-based) are difficult to apply to large-scale paper, cloth or film products on a large scale

Method used

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  • Multiple reversible color change microcapsule anti-counterfeiting material and preparation method and application thereof
  • Multiple reversible color change microcapsule anti-counterfeiting material and preparation method and application thereof
  • Multiple reversible color change microcapsule anti-counterfeiting material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] (1) Preparation of capsule core material:

[0090] 20 parts by mass of red temperature-changing material (temperature-changing powder of Beijing Chenlei Technology Co., Ltd.), 6 parts by mass of ultraviolet-excited fluorescent material (ultraviolet fluorescent powder of Guangzhou Mingbo Anti-counterfeiting Technology Co., Ltd.), 6 parts by mass of infrared-excited fluorescent material ( Infrared fluorescent powder of Shanghai Kerun Photoelectric Material Co., Ltd.), 10 mass parts of humidity-sensitive color-changing powder (Seilkaduel Colour of Japan Dainichi Seika Industry Co., Ltd.), 2 mass parts of ultraviolet absorber UV327 and 2 mass parts of antioxidant 1010, dissolved in 100 In mass parts diisopropyl naphthalene, obtain solution A; With 200 mass parts containing the aqueous solution of 5% polyethylene maleic anhydride copolymer (EMA-31) and 15 mass parts containing 5% hydroxyethyl cellulose protective colloid aqueous solution Mix to obtain solution B; add solutio...

Embodiment 2

[0097] (1) Preparation of moisture-sensitive material (cobalt chloride-hexamethylenetetramine-diatomite pigment microcapsules):

[0098] A, preparation of microcapsule capsule core

[0099] Dissolve 20 parts by mass of cobalt chloride, 20 parts by mass of hexamethylenetetramine and 20 parts by mass of urea with 100 parts by mass of deionized water, add 50 parts by mass of diatomaceous earth, disperse for 30 minutes at 3000 rpm, and then soak for 2 hours, and then centrifuged, the filter cake is dried, and crushed into a fine powder of more than 800 mesh to obtain the microcapsule capsule core;

[0100] B, preparation of microcapsule wall material

[0101]30 parts by mass of urea, 60 parts by mass of melamine, 200 parts by mass of 37% formaldehyde aqueous solution (mass percentage) and 100 parts by mass of deionized water are mixed evenly, and the pH value is adjusted to 8 to 9 with 20% NaOH. After sub-stirring for 2 hours, water-cooled to obtain a urea-melamine-formaldehyde ...

Embodiment 3

[0112] (1) Preparation of capsule core material: 100 parts by mass of green temperature-changing material (temperature-changing powder of Beijing Chenlei Technology Co., Ltd.), 50 parts by mass of ultraviolet-excited fluorescent material (ultraviolet fluorescent powder of Guangzhou Mingbo Anti-counterfeiting Technology Co., Ltd.) , 50 parts by mass of infrared-excited fluorescent material (infrared fluorescent powder of Shanghai Kerun Photoelectric Material Co., Ltd.), 30 parts by mass of ultraviolet absorber UV327 and 50 parts by mass of antioxidant 1076, dissolved in 300 parts by mass of dibutyl phthalate , to obtain solution A; 600 parts by mass of aqueous solution containing 5% styrene maleic anhydride copolymer and 20 parts by mass of 10% polyvinyl alcohol aqueous solution were mixed to obtain solution B; solution A was added to solution B, at 8000 rpm Emulsify at a stirring speed of 30 minutes per minute, use a 400 times microscope to check that the particle size of the e...

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Abstract

The invention discloses a multiple reversible color change microcapsule anti-counterfeiting material and a preparation method and applications thereof. The preparation method comprises the following steps: dissolving at least one of temperature-sensitive material, humidity sensitive material, ultraviolet excited fluorescence material and infrared excited fluorescence material in high boiling point solvent containing UV resistant agent and antioxidant, then adding emulsifier and protective colloid to obtain emulsion solution, and adopting the in-situ polymerization method to obtain the anti-counterfeiting material with microcapsule structure. The microcapsule structure of the invention can isolate the air and the wall of the microcapsule can reduce the light transmission, thus improving the weather resistance and light resistance of the anti-counterfeiting material and prolonging the use validity of the product. The material is a microcapsule aqueous solution so that the material is completely applicable to the coating method of the currently existing water-based paint, removes apprehensions in areas of safety, health and environmental protection, thoroughly solves the defect of the complicated solvent-based (oily material) coating and processing method, satisfies the anti-counterfeiting demand and can be applied in papers, cloth and film materials in large.

Description

technical field [0001] The invention relates to an anti-counterfeit material, in particular to a multi-reversible color-reversible microcapsule anti-counterfeit material and its manufacturing method and application. Background technique [0002] With the development of anti-counterfeiting technology, temperature-changing materials have become raw materials for preparing products with high anti-counterfeiting performance. Polycrystals of metal iodides, complexes, double salts, and various metal oxides have been the main inorganic reversible thermochromic substances for a long time. The principle of thermal discoloration of inorganic compounds mainly includes crystallization change, chemical change, thermal decomposition and so on. Electron donors, electron acceptors and solvents constitute a traditional and typical organic thermochromic substance. The discoloration mechanism is due to the transfer of electrons caused by temperature changes. The transfer of electrons absorbs...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06C09K9/02C09K3/00B01J13/18D21H21/48D21H21/54D21H21/30D21H17/49D21H17/12
Inventor 张世智
Owner 张世智
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