Anti-counterfeiting pigment as well as preparation method and application thereof

A kind of pigment, fluorescent dye technology

Pending Publication Date: 2022-06-07
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, organic fluorescent dyes are easily affected by environmental factors such as solvents, solution pH, and surfactants, which will eventually lead to the optical properties (absorption spectrum, emission spectrum, fluorescence efficiency, fluorescence lifetime, etc.) of the prepared functional fluorescent pigments being affected. have adverse effects

Method used

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  • Anti-counterfeiting pigment as well as preparation method and application thereof
  • Anti-counterfeiting pigment as well as preparation method and application thereof
  • Anti-counterfeiting pigment as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A kind of anti-counterfeiting pigment, its preparation method comprises the following steps:

[0040] 1) Add 0.30 g of microcrystalline cellulose and 0.06 g of fluorescent yellow to 600 mL of deionized water, and stir for 65 min at a rotating speed of 3200 r / min under dark conditions to obtain a mixed dispersion (microcrystalline cellulose and fluorescent yellow). The schematic diagram of the self-assembly reaction process is shown in figure 1 shown);

[0041] 2) Add 1.65 g of rosin-modified phenolic resin (analytical grade, Sinopharm Chemical Reagent Co., Ltd.) into the reactor equipped with a mechanical stirring rod, stir continuously at a rotating speed of 6200 r / min, and heat up to 190 ° C, then add Mix the dispersion, 0.02g of hyperdispersant SRE-47000-100HB (Guangdong Fuji Technology Co., Ltd.) and 0.02g of light stabilizer Tinuvin326 (BASF, Germany), continue to stir for 100min, cool to 38°C and filter, and the filtered solid Washing with hot water, then drying...

Embodiment 2

[0043] A kind of anti-counterfeiting pigment, its preparation method comprises the following steps:

[0044] 1) Add 0.38 g of microfibrillated cellulose and 0.075 g of rhodamine B to 607 mL of deionized water, and stir for 55 min at a rotating speed of 3800 r / min under dark conditions to obtain a mixed dispersion;

[0045] 2) Add 1.50 g of rosin-modified phenolic resin (analytical grade, Sinopharm Chemical Reagent Co., Ltd.) into the reactor equipped with a mechanical stirring rod, stir continuously at a rotating speed of 6200 r / min, and heat up to 160 ° C, then add Mix the dispersion, 0.03g of hyperdispersant SRE-47000-100HB (Guangdong Fuji Technology Co., Ltd.) and 0.03g of light stabilizer Tinuvin326 (BASF, Germany), continue to stir for 130min, cool to 38°C and filter, and the filtered solid Washing with hot water, then drying in a vacuum drying box at 95°C for 4.5 hours, and pulverizing to obtain an anti-counterfeiting pigment.

Embodiment 3

[0047] A kind of anti-counterfeiting pigment, its preparation method comprises the following steps:

[0048] 1) Add 0.28 g of bacterial cellulose and 0.065 g of basic brilliant blue to 539 mL of deionized water, and stir at a speed of 3200 r / min for 65 min under dark conditions to obtain a mixed dispersion;

[0049] 2) Add 1.56 g of rosin-modified phenolic resin (analytical grade, Sinopharm Chemical Reagent Co., Ltd.) into the reactor equipped with a mechanical stirring rod, stir continuously at a rotating speed of 6600 r / min, and heat up to 160 ° C, then add Mixed dispersion, 0.025g of hyperdispersant SRE-47000-100HB (Guangdong Fuji Technology Co., Ltd.), 0.02g of light stabilizer Tinuvin326 (BASF, Germany) and 0.01g of surfactant Dowfix2A1 (Dow Chemical Company, USA), Continue stirring for 100 min, cool to 30°C and filter, wash the filtered solid with hot water, then place it in a vacuum drying oven at 85°C to dry for 5.5 hours, and pulverize to obtain an anti-counterfeiting...

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Abstract

The invention discloses an anti-counterfeiting pigment as well as a preparation method and application thereof. The anti-counterfeiting pigment provided by the invention comprises the following components in percentage by mass: 12-22% of nano cellulose; 2%-5% of an organic fluorescent dye; 73%-83% of optical transparent resin; and 2%-6% of a fluorescent auxiliary agent. The preparation method of the anti-counterfeiting pigment comprises the following steps: 1) dispersing nanocellulose and an organic fluorescent dye in water under a dark condition to obtain a mixed dispersion liquid; and 2) dispersing the mixed dispersion liquid and a fluorescent auxiliary agent in optical transparent resin, filtering, washing, drying and crushing to obtain the anti-counterfeiting pigment. The anti-counterfeiting pigment disclosed by the invention is high in luminous intensity under ultraviolet irradiation, bright in color, strong in fluorescence quenching resistance, excellent in fluorescence anti-counterfeiting effect, high in mechanical strength, strong in light transmission, good in light resistance, safe, environment-friendly, simple in preparation process, low in cost, long in service life and wide in application range.

Description

technical field [0001] The invention relates to the technical field of organic light-emitting materials, in particular to an anti-counterfeiting pigment and a preparation method and application thereof. Background technique [0002] Fluorescent anti-counterfeiting technology is a commonly used anti-counterfeiting method, and the performance of fluorescent pigments has a direct impact on the effect of fluorescent anti-counterfeiting. Organic fluorescent dyes refer to organic compounds with fluorescent properties, and their molecules contain fluorescence-emitting groups (carbonyl, nitrogen-nitrogen double bond, carbon-nitrogen double bond, etc.), auxochrome groups (primary amino group, secondary amino group, etc.) , hydroxyl, ether bonds, etc.) or conjugated π bonds of rigid planar structures. Organic fluorescent dyes are commonly used carriers of luminescent materials, and are often made into functional fluorescent pigments by dispersing in transparent resin binders and medi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06C09K11/02C09D11/50C09D5/22
CPCC09K11/06C09K11/025C09D5/22C09D11/50
Inventor 陈奇峰朱敏罗国辉
Owner SOUTH CHINA UNIV OF TECH
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