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Dopamine organic silicon hybrid coated water-based aluminum pigment and production method thereof

A production method and aluminum pigment technology, which is applied in the field of aluminum pigment production, can solve the problems of poor dispersion and easy sedimentation of silica coating, and achieve the effect of improving coating effect, long-lasting stability, and controllable coating thickness

Inactive Publication Date: 2021-06-22
安徽天易金属新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a dopamine organosilicon hybrid coating water-based aluminum pigment and its production method, which adopts innovative PDA coating material, which solves the problems of poor dispersion and easy sedimentation of silica coating alone

Method used

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  • Dopamine organic silicon hybrid coated water-based aluminum pigment and production method thereof
  • Dopamine organic silicon hybrid coated water-based aluminum pigment and production method thereof

Examples

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Effect test

Embodiment 1

[0025] A method for producing dopamine organosilicon hybrid coated water-based aluminum pigment, the steps comprising:

[0026] Step 1: Prepare the oil-soluble aluminum pigment, mix the oil-soluble aluminum pigment with IPA solvent, and separate the solid and liquid after ultrasonic dispersion to obtain a solid mixture with a solid content of 70%;

[0027] Step 2: Mix 40 parts of the solid mixture, 0.5 parts of sodium bicarbonate, 12 parts of tetraethyl orthosilicate, 3 parts of KH-540, and 3 parts of ammonia water, then add 5 times the weight of IPA solvent, and the temperature of the water bath is 40 °C , reacted for 6h, and obtained a filter cake with a solid content of 60% through pressure filtration;

[0028] Step 3: the filter cake that step 2 is obtained is placed in the tris of 2g / L in concentration, adds concentrated hydrochloric acid, adjusts pH to be 8, after the system is stabilized, add the dopamine hydrochloride of 1mmol / L ( Purity 98%), and control the temperat...

Embodiment 2

[0030] A method for producing dopamine organosilicon hybrid coated water-based aluminum pigment, the steps comprising:

[0031] Step 1: Prepare the oil-soluble aluminum pigment, mix the oil-soluble aluminum pigment with BG solvent, and separate the solid and liquid after ultrasonic dispersion to obtain a solid mixture with a solid content of 80%;

[0032] Step 2: Mix 50 parts of the solid mixture, 2 parts of sodium bicarbonate, 15 parts of tetraethyl orthosilicate, 4 parts of KH-550, and 4 parts of ammonia water, then add 6 times the weight of PM solvent, and the temperature of the water bath is 50 °C , reacted for 4.5h, and obtained a filter cake with a solid content of 65% through pressure filtration;

[0033] Step 3: the filter cake that step 2 is obtained is placed in the tris of 4g / L in concentration, adds concentrated nitric acid, regulates pH to be 8, after the system is stabilized, add the dopamine hydrochloride of 5mmol / L ( Purity 98%), and control the temperature of...

Embodiment 3

[0035] A method for producing dopamine organosilicon hybrid coated water-based aluminum pigment, the steps comprising:

[0036] Step 1: Prepare the oil-soluble aluminum pigment, mix the oil-soluble aluminum pigment with PM solvent, and separate the solid and liquid after ultrasonic dispersion to obtain a solid mixture with a solid content of 85%;

[0037] Step 2: Mix 60 parts of the solid mixture, 3 parts of sodium bicarbonate, 18 parts of tetraethyl orthosilicate, 5 parts of A-151, and 5 parts of ammonia water, then add 8 times the weight of DPM solvent, and the temperature of the water bath is 60 °C , reacted for 3h, and obtained a filter cake with a solid content of 70% through pressure filtration;

[0038] Step 3: Place the filter cake obtained in Step 2 in Tris at a concentration of 5 g / L, add concentrated hydrochloric acid or concentrated nitric acid to adjust the pH to 9, and after the system is stable, add 10 mmol / L of dopamine hydrochloride salt (purity 98%), and con...

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Abstract

The invention discloses a dopamine organic silicon hybrid coated water-based aluminum pigment and a production method thereof, and the method comprises the following steps: 1, preparing an oil-soluble aluminum pigment, and carrying out solvent replacement; 2, preparing a silicon dioxide coated aluminum pigment, and carrying out filter pressing to obtain a filter cake; and 3, putting the filter cake obtained in the step 2 into trihydroxymethyl aminomethane with the concentration of 2-5g / L, adding an acid solution to adjust the pH value to 8-9, after the system is stable, adding 1-10mmol / L of dopamine salt, controlling the temperature of the whole system to 23-27 DEG C, stirring for 4-6 hours, and finally, carrying out filter pressing and discharging to obtain the dopamine organic silicon hybrid coated water-based aluminum pigment. The invention provides a novel water-based aluminum pigment film coating path, the coating compactness is good, the film coating thickness is controllable, the stability is lasting, the application dispersibility of the water-based aluminum pigment is improved, and the anti-settling property is improved.

Description

technical field [0001] The invention relates to the technical field of aluminum pigment production, in particular to a dopamine-organosilicon hybrid coated water-based aluminum pigment and a production method thereof. Background technique [0002] In the existing technology, there are mainly two technologies for water-based aluminum pigments, one is the corrosion-inhibiting type, which uses phosphate, molybdate, chromate, etc., and the other is the silicone coating technology, both of which have been In market applications, the corrosion-inhibiting type has a short storage period, while the silicon coating has problems such as high oil absorption value and serious color loss. [0003] Dopamine is oxidized and self-polymerized in environmental solution, and its adsorption capacity is extremely strong. It can modify the surface of almost all types of organic and inorganic materials. A uniform polydopamine (Polydopamine, PDA) layer is applied on the surface of the material, and...

Claims

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Application Information

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IPC IPC(8): C09C1/64C09C3/06C09C3/08C09C3/12C09D7/62
CPCC09C1/648C09C3/006C09C3/063C09C3/08C09C3/12C09D7/62
Inventor 操玉节董前年孙先维赵楠楠李国旺刘云龙朱双单马红丽
Owner 安徽天易金属新材料有限公司
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