Preparation method of aluminum paste for water paint

A technology of water-based paint and aluminum-silver paste, applied in the direction of pigment paste, fibrous filler, metal-free paint, etc., can solve the problems of cost increase and other problems, and achieve surface re-modification, good metal effect, and good dispersibility Effect

Inactive Publication Date: 2010-01-27
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method is to directly process the oily aluminum silver paste, and the oily aluminum silver paste has been ground before that, which will inevitably increase the cost
The Chinese patent with application number 200610123751.8 discloses a preparation method of coated aluminum powder pigment. The method double-coats the surface of aluminum powder pigment to make it have good acid and alkali resistance, and is suitable for water-based coatings. However, the aluminum powder pigment prepared by this method is also coated with flake aluminum powder, and the grinding process has been carried out before that, only the aluminum silver paste is modified and reprocessed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] 1. By weight, add 60 parts of raw aluminum powder and 90 parts of solvent ethanol into the reaction container, and stir for 2 hours at a temperature of 40°C; add 3 parts of tetraethoxysilane, 30 parts of ethyl acetate ester, stirred at room temperature for 30 minutes; in another reaction vessel, add 20 parts of hydroxyacrylic resin, heat and melt, then add 25 parts of ethanol, and stir for 30 minutes; 2. Add the aluminum powder suspension obtained in the previous two steps dropwise After mixing, keep the temperature at 40°C, react under stirring for 4 hours, then heat to a temperature of 80°C, then add the mixture obtained in the third step dropwise, and react for 8 hours. Filter and dry to obtain coated aluminum powder; 3. Add 60 parts of the obtained coated aluminum powder, 120 parts of steel balls, 120 parts of distilled water and 3 parts of stearic acid and polyvinyl alcohol mixing additives into the ball mill, and the ball milling time is 12 After 1 hour, the alumi...

Embodiment 2

[0012] 1. By weight, add 60 parts of raw aluminum powder and 180 parts of solvent ethylene glycol butyl ether into the reaction container, and stir for 2 hours at a temperature of 60°C; add 6 parts of aminopropyl triethoxylate into another container base silane, 40 parts of butyl acetate, stirred at room temperature for 30 minutes; in another reaction vessel, add 30 parts of hydroxyacrylic resin, after heating and melting, add 45 parts of ethylene glycol butyl ether, and stir for 30 minutes; 2. After the aluminum powder suspension obtained in the first two steps is added dropwise and mixed, the temperature is maintained at 60°C, reacted for 6 hours under stirring, then heated to a temperature of 80°C, then added dropwise to the mixture obtained in the third step, reacted for 8 hours, and waited After the reaction, cool to room temperature, let stand, filter, and dry to obtain coated aluminum powder; 3. Mix the obtained 60 parts of coated aluminum powder, 180 parts of steel ball...

Embodiment 3

[0014] 1. By weight, add 100 parts of raw aluminum powder and 100 parts of solvent isopropanol into the reaction container, and stir for 2 hours at a temperature of 60°C; add 10 parts of aminopropyltriethoxysilane into another container , 40 parts of butyl acetate, stirred at room temperature for 30 minutes; 40 parts of hydroxyacrylic resin was added to another reaction vessel, and after heating and melting, 60 parts of n-butanol was added and stirred for 30 minutes; 2. After the aluminum powder suspension is added dropwise and mixed, the temperature is maintained at 60°C, reacted for 6 hours under stirring, then heated to a temperature of 100°C, and then added dropwise to the mixture obtained in the third step, reacted for 16 hours, after the reaction is completed Cool to room temperature, let stand, filter, and dry to obtain coated aluminum powder; 3. Add 100 parts of coated aluminum powder, 400 parts of steel balls, 400 parts of distilled water and 5 parts of stearic acid in...

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Abstract

The invention discloses a preparation method of aluminum paste for water paint, comprising the steps: firstly, realizing hydroxylation on the surface of the raw material of aluminum powder; adding siloxane for producing silanol by a hydrolytic reaction; combining the siloxane with a hydroxyl group on the surface of the aluminum powder; coating a layer of protective film on the surface of the aluminum powder; and grinding and preparing aluminum paste for water paint by using distilled water as a solvent through a ball mill. The aluminum paste for water paint has good dispersibility in alcohol solvents and water solvents, excellent corrosion resistant performance, weather resistant performance and good metal effect and can be used as an environmental protection metal pigment for environmental protection water paint, automobile finish and water printing ink.

Description

1. Technical field [0001] The invention relates to a method for preparing aluminum-silver paste for water-based coatings, belonging to the field of metal coatings. 2. Background technology [0002] Aluminum silver paste is a kind of metallic pigment with silver-gray metallic luster, which is widely used. Most of its manufacturing methods adopt wet ball milling process, and mineral oil, 200# solvent oil, etc. are usually used as solvents in the ball milling preparation process. This makes the prepared aluminum silver paste contain a large amount of VOC (volatile organic content). With the continuous enhancement of people's awareness of environmental protection and the arrival of foreign companies after my country's entry into WTO, the paint industry is facing an unprecedented challenge, that is, how to reduce the pollution caused by the production and use of paint, especially the pollution to the atmosphere. The prevention and control of VOC started earlier in western devel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/64C09D17/00C09D5/38
Inventor 蔡晓兰向红印
Owner KUNMING UNIV OF SCI & TECH
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