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Aqueous aluminum powder paint and preparation method thereof

A kind of aluminum powder paint, water-based technology, applied in the direction of coating, anti-corrosion coating, etc., can solve pollution and other problems, achieve good gloss retention, strong adhesion, and ensure the effect of environmental protection

Active Publication Date: 2016-10-12
ZHEJIANG UVCHEM SPECIAL COATINGS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This invention effectively improves the performance of the coating, but using turpentine as a solvent still causes pollution

Method used

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  • Aqueous aluminum powder paint and preparation method thereof
  • Aqueous aluminum powder paint and preparation method thereof
  • Aqueous aluminum powder paint and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1-3

[0041] 1. Production process of modified aluminum powder:

[0042] (1) Put aluminum powder, ethyl orthosilicate, methyltriethoxysilane, silane coupling agent, ethanol and water into the dispersion tank, and stir at low speed until the dispersion is uniform. Slowly add 0.1 mol / L hydrochloric acid aqueous solution while stirring, pH=6. Use the jacket in the dispersion tank to heat to 65°C and keep it for 10 hours.

[0043] After the silica coating is finished, the silica coated aluminum powder can be obtained by centrifugation.

[0044] Use ethanol to clean the prepared aluminum powder to remove water and adjust the pH to neutral.

[0045] (2) Put the siloxane-coated aluminum powder into propylene glycol methyl ether, heat to 80°C, dropwise add a mixture of acrylic acid (ester), methacrylic acid (ester), and thermal initiator; after the addition is complete, Continue to react for 4h. After the reaction, it is neutralized with triethylamine, and water is added dropwise during high-spe...

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Abstract

The invention discloses aqueous aluminum powder paint and a preparation method thereof. The preparation method comprises: (1) mixing aluminum powder, alkoxy silane, a silane coupling agent, ethanol and water; dropping hydrochloric acid to adjust the pH value to be 3 to 6; heating to react; after a reaction is finished, separating sediment and washing the sediment with alcohol and drying to obtain silicon dioxide modified aluminum powder; (2) adding the silicon dioxide modified aluminum powder into an organic solvent and dropping an acrylic resin monomer and a thermal initiator to carry out a polymerization reaction; after the reaction is finished, adjusting the pH value to be neutral; adding the water and emulsifying; removing the organic solvent to obtain an aluminum powder-acrylic resin compound; (3) mixing the aluminum powder-acrylic resin compound with amino resin, a flatting agent, a catalyst and the water and stirring and dispersing to prepare the aqueous aluminum powder paint. A paint film formed by the prepared aluminum powder paint has excellent performances including strong adhesive force, water resistance, salt fog resistance, good gloss retention and the like.

Description

Technical field [0001] The invention relates to the field of polymer materials, in particular to a water-based aluminum powder paint and a preparation method thereof. Background technique [0002] Aluminum powder paint is a kind of paint containing aluminum powder. Due to the good ductility of aluminum, a continuous aluminum film can be formed in the coating film, which can cover pinholes and reduce permeability. Nowadays, a large number of aluminum alloy wheels are used in middle and high-end cars, and aluminum powder paint is the main coating method for wheels in the world. The main painting modes are as follows: pretreatment→aluminum powder paint painting→overcoat painting. [0003] Traditional aluminum powder paint coating is generally based on solvent-based paints. The paint used to produce aluminum powder paint is usually composed of alkyd resin, solvent and aluminum powder paste. Alkyd resin is based on polybasic acid, monoacid and polybasic acid. Alcohol and other raw mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/08C09D133/02C09D133/10C09D161/20C09D5/10C09D7/12
CPCC09D5/103C09D133/02C09D133/08C09D133/10C08L61/20C08K9/10C08K2003/0812
Inventor 陈梦茹戴春晖刘磊张卫宝张忠良
Owner ZHEJIANG UVCHEM SPECIAL COATINGS CO LTD
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