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Sheet-like magnetic infrared pigment and preparation method thereof

A technology of infrared pigments and magnetic pigments, applied in the direction of fibrous fillers, inorganic pigment treatment, chemical instruments and methods, etc., can solve problems such as delamination, poor friction resistance, and inks that cannot achieve printing effects, and achieve wide application Value, the effect of simple operation

Active Publication Date: 2014-01-15
HUIZHOU FORYOU OPTICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Mixing magnetic pigments and infrared pigments into ink, the ink cannot achieve special printing effects, magnetic pigments and infrared pigments will appear delamination, poor friction resistance and many other disadvantages, thus limiting its application

Method used

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  • Sheet-like magnetic infrared pigment and preparation method thereof
  • Sheet-like magnetic infrared pigment and preparation method thereof

Examples

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Embodiment 1

[0027] An embodiment of a flaky magnetic infrared pigment of the present invention, the flaky magnetic infrared pigment described in this embodiment is prepared by the following method:

[0028] (1) Take 50g of flaky magnetic powder, put it in a four-necked flask, add 1L of 0.5% ammonium fluoride aqueous solution, stir and raise the temperature to 50°C, after 0.5h of treatment, put it into the suction filtration tank, and suction and wash it into the filtrate The fluoride ion concentration is less than 50ppm, and the pretreated flaky magnetic powder is obtained;

[0029] (2) Add 50g of flaky magnetic powder obtained in step (1) and 750mL of deionized water into a four-neck flask, stir and raise the temperature to 80°C, adjust the pH value to 7.0, and add 20g / L of AlCl dropwise at a rate of 40mL / h 3 Solution 10mL, and at the same time adjust with 10% NaOH solution to maintain a stable pH value, keep stirring for 2 hours after feeding, then filter with suction, wash with deioniz...

Embodiment 2

[0034] An embodiment of a flaky magnetic infrared pigment of the present invention, the flaky magnetic infrared pigment described in this embodiment is prepared by the following method:

[0035] (1) Take 50g of flaky magnetic powder, put it in a four-necked flask, add 1L of 0.01% potassium hydroxide aqueous solution, stir and raise the temperature to 20°C, after 2 hours of treatment, put it into a suction filtration tank, and suction and wash until the hydrogen in the filtrate Oxygen ion concentration is less than 50ppm to obtain pretreated flaky magnetic powder;

[0036] (2) Add 50g of flaky magnetic powder obtained in step (1) and 1000mL of deionized water into a four-neck flask, stir and raise the temperature to 60°C, adjust the pH to 8.0, and add 50g / L of AlCl dropwise at a rate of 40mL / h 3 Solution 12.5mL, and at the same time adjust with 10% NaOH solution to maintain a stable pH value, keep stirring for 3 hours after feeding, then filter with suction, wash with deionized...

Embodiment 3

[0040] An embodiment of a flaky magnetic infrared pigment of the present invention, the flaky magnetic infrared pigment described in this embodiment is prepared by the following method:

[0041] (1) Take 50g of flaky magnetic powder, put it in a four-necked flask, add 1L of 0.6% sodium hydroxide aqueous solution, stir and raise the temperature to 80°C, put it into a suction filtration tank after treatment for 1 hour, and suction and wash until the hydrogen in the filtrate Oxygen ion concentration is less than 50ppm to obtain pretreated flaky magnetic powder;

[0042] (2) Add 50g of flaky magnetic powder obtained in step (1) and 900mL of deionized water into a four-neck flask, stir and raise the temperature to 90°C, adjust the pH to 4.0, and drop 30g / L of silicon at a rate of 40mL / h NaOH solution 2.5mL, and at the same time adjust with 10% NaOH solution to maintain a stable pH value, keep stirring for 1 hour after feeding, then filter with suction, wash with deionized water fir...

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Abstract

The invention discloses a sheet-like magnetic infrared pigment. The pigment has a sheet-like sandwich structure formed by at least three layers A, B and C which are sequentially arranged from inside to outside. The layers A, B and C are a sheet-like magnetic pigment layer A, a connecting material layer B coated outside the sheet-like magnetic color layer, and a near-infrared absorption pigment or a near-infrared excitation pigment layer C coated outside the connecting material layer. The sheet-like magnetic infrared pigment disclosed by the invention combines magnetic and infrared anti-counterfeit signals, and can achieve the effect of oriented arrangement. Ink made of the pigment after being printed can achieve the 3D effect under the fixed magnetic action, for example, scroll bars, three-dimensional balls, plane slightly-embossed carving and the like. The sheet-like magnetic infrared pigment has a broad application value in the fields of anti-counterfeit technology and military affairs. Besides, the invention also discloses a method for preparing the sheet-like magnetic infrared pigment. The method is easy to operate, and the prepared sheet-like magnetic infrared pigment is stable.

Description

technical field [0001] The invention relates to a near-infrared absorbing or exciting pigment and a preparation method thereof, in particular to a flake magnetic near-infrared absorbing or exciting pigment and a preparation method thereof. Background technique [0002] Magnetic infrared pigments, that is, magnetic infrared absorbing pigments or magnetic infrared exciting pigments, are products of a new concept. It integrates magnetic signal and infrared signal, and combines the two kinds of anti-counterfeiting signals, and the ink made can achieve special 3D stereo effect, and it will definitely be the darling of the anti-counterfeiting industry. But do not see the appearance of this class pigment at present. At present, there are only single-signal pigments such as magnetic pigments, infrared absorbing pigments, infrared excitation pigments, etc. [0003] The products currently involved are magnetic infrared materials, such as CN101445362A, a preparation method of a far-i...

Claims

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Application Information

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IPC IPC(8): C09C3/06C09C1/40C09C1/62C09C1/24C09D11/50
Inventor 王文军虞林瑞宋德生龙芬
Owner HUIZHOU FORYOU OPTICAL TECH
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