Photosensitive color-changing anti-counterfeit barcode and preparation method thereof

A photosensitive discoloration and barcode technology, which is applied in the field of anti-counterfeiting barcodes, can solve the problems of being easy to be imitated and not being able to realize anti-counterfeiting, and achieve the effects of good anti-counterfeiting effect, low cost and low production cost

Active Publication Date: 2022-04-29
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And because the composition of the barcode is simple, in the case of the simple vertical bar distribution pattern of the barcode, the above anti-counterfeiting technology is difficult to be applied to the barcode, and it cannot realize real anti-counterfeiting, and it is easy to be imitated

Method used

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  • Photosensitive color-changing anti-counterfeit barcode and preparation method thereof

Examples

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Effect test

Embodiment 1

[0026] A photosensitive color-changing anti-counterfeiting barcode, the preparation method thereof comprises the following steps:

[0027] (1) Preparation of intermediate: Stir barbituric acid and furfural at 40°C for 5 hours, then wash with water, filter with suction, extract, dry, filter with suction twice, purify by column chromatography, and rotate to evaporate to obtain the intermediate; Among them, the molar ratio of barbituric acid and furfural is 1:1; successively use saturated sodium bisulfite solution and saturated sodium chloride solution to extract, use anhydrous magnesium sulfate to dry, and the eluent during column chromatography purification is dichloro methane;

[0028] (2) Preparation of DASAs molecules: Dissolve the intermediate obtained in step (1) in dichloromethane, then add N-methylaniline, stir at a constant temperature of 30°C for 3 hours, then sequentially purify by column chromatography and rotary steam to obtain DASA molecule; wherein, intermediate ...

Embodiment 2

[0031] A photosensitive color-changing anti-counterfeiting barcode, the preparation method thereof comprises the following steps:

[0032] (1) Intermediate preparation: Stir Michaelis acid and furfural at 40°C for 5 hours, then successively wash with water, filter with suction, extract, dry, filter with suction twice, purify by column chromatography, and rotate to evaporate to obtain the intermediate; , Michaelis acid and furfural molar ratio is 1:1; successively use saturated sodium bisulfite solution and saturated sodium chloride solution to extract, use anhydrous magnesium sulfate to dry, eluent is dichloromethane during column chromatography purification;

[0033] (2) Preparation of DASAs molecules: Dissolve the intermediate obtained in step (1) in dichloromethane, then add N-methylaniline, stir at a constant temperature of 30°C for 3 hours, then sequentially purify by column chromatography and rotary steam to obtain DASA molecule; wherein, the molar ratio of the intermedi...

Embodiment 3

[0036] A photosensitive color-changing anti-counterfeiting barcode, the preparation method thereof comprises the following steps:

[0037] (1) Preparation of intermediates: Stir 1,3-indandione and furfural at 40°C for 5 hours, then wash with water, filter with suction, extract, dry, filter with suction twice, purify with column chromatography and rotary evaporate, The intermediate is obtained; wherein, the molar ratio of 1,3-indandione and furfural is 1:1; successively use saturated sodium bisulfite solution and saturated sodium chloride solution to extract, use anhydrous magnesium sulfate to dry, column chromatography The eluent is dichloromethane during purification;

[0038] (2) Preparation of DASAs molecules: Dissolve the intermediate obtained in step (1) in dichloromethane, then add indoline, stir at a constant temperature of 30°C for 3 hours, then sequentially purify by column chromatography and rotary steam to obtain DASA Molecule; Wherein, intermediate and indoline mo...

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Abstract

The invention provides a photosensitive color-changing anti-counterfeit barcode and a preparation method thereof. The preparation method comprises the following steps: stirring the acceptor and furfural for 4 to 5 hours, followed by water washing, suction filtration, extraction, drying, secondary suction filtration, purification and spin Evaporate to obtain the intermediate; dissolve the intermediate in dichloromethane, then add the donor, stir at a constant temperature of 30°C for 2 to 4 hours, and then undergo purification and rotary evaporation in turn to obtain DASAs molecules; combine DASAs molecules and dye molecules Dissolving and mixing and adding polymers to obtain printing ink; printing photosensitive color-changing anti-counterfeiting barcodes through printing ink. The invention also includes the photosensitive color-changing anti-counterfeit barcode prepared by the method. The preparation process of the present invention is simple and easy to control, and the production cost is low. Through the photosensitive discoloration property of the ink, the flashlight of the mobile phone is used as the light source to complete the discoloration of the barcode, and further realize the anti-counterfeiting effect of the barcode graphic, effectively solving the problem that the anti-counterfeiting code in the prior art is easy to imitate The problem.

Description

technical field [0001] The invention belongs to the technical field of anti-counterfeiting barcodes, in particular to a photosensitive color-changing anti-counterfeiting barcode and a preparation method thereof. Background technique [0002] With the development of technology, various new technologies emerge in an endless stream, and information security and encryption technology become particularly important. Anti-counterfeiting technology is a new type of technology that is often used in people's work and life, including commercial operations or commodity management, which involve the confidentiality of information and the use of anti-counterfeiting technology. Barcode has the function of recording commodity or operation information, and it is an important way of storing information for individuals, enterprises or governments. Therefore, criminals often make false barcodes for profit; this also leads to forgery and falsification of commodity information, which seriously a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D11/50C09D11/108C09D11/107C09D11/104C07D319/06C07D239/62C07D209/08C09K9/02
CPCC09D11/50C09D11/107C09D11/104C09D11/108C07D319/06C07D239/62C07D209/08C09K9/02C09K2211/1088C09K2211/1029C09K2211/1044C09K2211/1011
Inventor 王东升毛礼俊熊超越段永丽郑永豪
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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