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Preparation method of dispersion stability-type water-based metallic flash paint for automobiles

A metal glitter paint, dispersion and stabilization technology, applied in the direction of metal-free paint, coating, etc., can solve the problems of damage to water-based paint, poor dispersion of water-based metal glitter paint, and unstable dispersed particles, etc., to achieve a high degree of clarity, Good gloss and sparkle effect, good dispersion performance and stability effect

Inactive Publication Date: 2017-07-04
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention: Aiming at the poor dispersibility of water-based metallic glitter paint, the dispersed particles are unstable, will be destroyed after being subjected to shear force, and will form acid particles with acidic substances, thereby destroying the defects of water-based paint, providing A method for preparing a modified liquid through carboxymethylation modification after extracting the polysaccharide inside the tea dregs, preparing water-based aluminum powder through the modified liquid, and compounding with water-based resin to prepare a water-based metal glitter paint with excellent dispersibility, the present invention The washed tea leaves are first dried and ground to obtain dry tea leaves powder, then mixed with deionized water, heated in a water bath to collect the filtrate and mixed with papain to prepare a tea polysaccharide solution, then mixed with sodium hydroxide solution and monochloroacetic acid, After adjusting the pH, stir and mix with flake aluminum powder and silane coupling agent, then add sodium silicate solution, filter and collect the filtrate, wash and dry to obtain water-based aluminum powder particles, then add polyvinyl alcohol, carboxymethylation modification solution, etc. Mix, adjust the pH and let it stand still to obtain the matrix mixture. Finally, the water-based aluminum powder is ball-milled and mixed with the matrix mixture to obtain a dispersion-stable automotive water-based metallic glitter paint.

Method used

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Examples

Experimental program
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Effect test

example 1

[0016]The discarded tea leaves were selected, washed three times with petroleum ether and 90% ethanol solution respectively, the washed tea leaves were collected and vacuum freeze-dried, the dried tea leaves were collected and ground in a mortar for 2 hours, passed through a 100-mesh sieve, and the obtained Dry tea leaves powder; according to the mass ratio of 1:10, stir and mix the dry tea leaves powder prepared above with deionized water, heat in a water bath at 65°C for 1 hour, then filter and collect the filtrate, according to the mass ratio of 1:10, the papaya Stir and mix the protease and filtrate and heat in a water bath at 35°C for 1 hour. After the water bath heating is completed, centrifuge at 4000r / min for 10 minutes and collect the supernatant to prepare a tea polysaccharide solution; The prepared tea polysaccharide solution was mixed with 10% sodium hydroxide solution by mass fraction and placed in a beaker, and heated in a water bath at 45°C for 25 minutes. After ...

example 2

[0019] The discarded tea leaves were selected, washed five times with petroleum ether and 90% ethanol solution respectively, the washed tea leaves were collected and vacuum freeze-dried, the dried tea leaves were collected and ground in a mortar for 3 hours, passed through a 100-mesh sieve, and the obtained Dry tea leaves powder; according to the mass ratio of 1:10, stir and mix the above-mentioned dried tea leaves powder with deionized water, heat in a water bath at 80°C for 2 hours, then filter and collect the filtrate, and according to the mass ratio of 1:10, papaya Stir and mix the protease and filtrate and heat in a water bath at 37°C for 2 hours. After the heating in the water bath is completed, centrifuge at 5000r / min for 15 minutes and collect the supernatant to prepare a tea polysaccharide solution; The prepared tea polysaccharide solution was mixed with 10% sodium hydroxide solution by mass fraction and placed in a beaker, and heated in a water bath at 50°C for 30 min...

example 3

[0022] Select waste tea leaves, wash them with petroleum ether and 90% ethanol solution for 4 times, collect the washed tea leaves and vacuum freeze-dry, collect the dried tea leaves and grind them in a mortar for 2.5 hours, pass through a 100-mesh sieve, and collect Obtain dry tea leaves powder; according to the mass ratio of 1:10, the dry tea leaves powder prepared above was stirred and mixed with deionized water, heated in a water bath at 72°C for 1.5h, then filtered and the filtrate was collected, according to the mass ratio of 1:10, Stir and mix papain and filtrate and heat in a water bath at 36°C for 1.5 hours. After the water bath heating is completed, centrifuge at 4500r / min for 12 minutes, and collect the supernatant to prepare a tea polysaccharide solution; the volume ratio is 1:5 , mix the tea polysaccharide solution prepared above with 10% sodium hydroxide solution by mass fraction and place it in a beaker, heat it in a water bath at 47°C for 27 minutes, and add 20%...

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Abstract

The invention discloses a preparation method of dispersion stability-type water-based metallic flash paint for automobiles and belongs to the technical field of metallic flash paint. The preparation method comprises drying and grinding washed tea leaf residues to obtain dried tea leaf powder, mixing the dried tea leaf powder and deionized water, carrying out water bath heating, collecting the filtrate, mixing the filtrate and a papain to obtain a tea polysaccharide solution, mixing the tea polysaccharide solution, a sodium hydroxide solution and monochloroacetic acid, adjusting pH, mixing the mixture, flake aluminum powder and a silane coupling agent, adding a sodium silicate solution into the mixture, filtering the mixture, collecting the filtrate, carrying out washing and drying to obtain water-based aluminum powder particles, mixing polyvinyl alcohol and a carboxymethylation modification liquid, adjusting pH, carrying out standing to obtain a base mixed solution, carrying out ball milling on the water-based aluminum powder particles, and mixing the water-based aluminum powder particles and the base mixed solution to obtain the dispersion stability-type water-based metallic flash paint. The dispersion stability-type water-based metallic flash paint has good dispersibility and stability, no pollution to the environment and has good gloss and flash effects.

Description

technical field [0001] The invention discloses a preparation method of a dispersion-stable automotive water-based metallic flash paint, belonging to the technical field of metallic flash paint. Background technique [0002] With the rapid development of the automobile industry, the amount of automotive coatings is also increasing. At present, domestic automotive coatings are mainly solvent-based paints. The disadvantage of solvent-based paints is that a large amount of volatile organic compounds (VOC) are very harmful to the environment. With the increase in the amount of such solvent-based paints, the pollution caused by volatile organic compounds (VOC) getting worse. In order to reduce environmental pollution, countries around the world have successively formulated relevant regulations to limit the use of VOC in paint. In order to protect the living environment of human beings, the development trend of automobile painting today is low pollution and pollution-free. The b...

Claims

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Application Information

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IPC IPC(8): C09D133/00C09D5/38C09D7/12
CPCC09D133/00C08L2205/025C08L2205/035C09D5/38C09D7/65C08L29/04C08L5/00C08K13/06C08K9/06C08K7/00C08K2003/0812
Inventor 陈兴权王艳芹李雪晴
Owner CHANGZHOU UNIV
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