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A kind of acid-resistant metallic flash coating for automobile shell and preparation method thereof

A technology for metal flash coatings and automobile shells, applied in anti-corrosion coatings, coatings, etc., can solve the problems of low flop effect index, poor acid corrosion resistance of coatings, poor dispersion of inorganic pigments, etc., to achieve uniform dispersion and improved lipophilicity , The effect of compatibility improvement

Inactive Publication Date: 2021-06-04
清远骑士涂料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The defect of the coating is that the dispersibility of the inorganic pigment is poor and the acid corrosion resistance of the coating is poor, making the durability of the coating unsatisfactory
[0007] In summary, in prior art metallic flash coatings, the poor dispersibility of inorganic metal pigments in organic coatings leads to low flop effect index, and the coatings containing metal pigments have poor acid resistance. Therefore, a kind of Metallic glitter coatings with good flop effect and good acid resistance are of great significance

Method used

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  • A kind of acid-resistant metallic flash coating for automobile shell and preparation method thereof

Examples

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Effect test

Embodiment 1

[0028] (1) Mix spherical aluminum powder, oleic acid, and isopropanol, perform wet ball milling, grind spherical aluminum powder into silver dollar shape, and then remove isopropanol to obtain silver dollar aluminum powder wrapped with oleic acid; The parts by weight are 17 parts by weight of spherical aluminum powder, 4 parts by weight of oleic acid, and 79 parts by weight of isopropanol;

[0029] (2) Add the pyrrole monomer to toluene, then add the oleic acid-wrapped silver dollar aluminum powder prepared in step (1), disperse evenly by ultrasonic, then drop the aqueous solution of ferric chloride as an oxidant to carry out polymerization reaction, reaction Carry out suction filtration after finishing, then wash repeatedly with methanol and deionized water, and finally vacuum-dry to obtain polypyrrole-oleic acid-wrapped aluminum powder pigment; the parts by weight of each raw material are: 5 parts by weight of pyrrole monomer, 23 parts by weight of toluene 17 parts by weight...

Embodiment 2

[0032] (1) Mix spherical aluminum powder, oleic acid, and isopropanol, perform wet ball milling, grind spherical aluminum powder into silver dollar shape, and then remove isopropanol to obtain silver dollar aluminum powder wrapped with oleic acid; The parts by weight are 17 parts by weight of spherical aluminum powder, 3 parts by weight of oleic acid, and 80 parts by weight of isopropanol;

[0033] (2) Add the pyrrole monomer to toluene, then add the oleic acid-wrapped silver dollar aluminum powder prepared in step (1), disperse evenly by ultrasonic, then drop the aqueous solution of ferric chloride as an oxidant to carry out polymerization reaction, reaction Carry out suction filtration after finishing, then wash repeatedly with methanol and deionized water, and finally vacuum-dry to obtain polypyrrole-oleic acid-wrapped aluminum powder pigment; the parts by weight of each raw material are, 4 parts by weight of pyrrole monomer, 22 parts by weight of toluene 17 parts by weight...

Embodiment 3

[0036] (1) Mix spherical aluminum powder, oleic acid, and isopropanol, perform wet ball milling, grind spherical aluminum powder into silver dollar shape, and then remove isopropanol to obtain silver dollar aluminum powder wrapped with oleic acid; The parts by weight are 19 parts by weight of spherical aluminum powder, 4 parts by weight of oleic acid, and 77 parts by weight of isopropanol;

[0037] (2) Add the pyrrole monomer to toluene, then add the oleic acid-wrapped silver dollar aluminum powder prepared in step (1), disperse evenly by ultrasonic, then drop the aqueous solution of ferric chloride as an oxidant to carry out polymerization reaction, reaction Carry out suction filtration after finishing, then wash repeatedly with methanol and deionized water, and finally vacuum-dry to obtain polypyrrole-oleic acid-wrapped aluminum powder pigment; the parts by weight of each raw material are: 6 parts by weight of pyrrole monomer, 24 parts by weight of toluene 18 parts by weight...

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Abstract

The invention relates to the field of automobile coatings, and provides an acid-resistant metallic flash coating for automobile shells and a preparation method thereof. The method first prepares silver-dollar aluminum powder coated with oleic acid by wet ball milling, and then in-situ polymerizes on the surface of the aluminum powder to form a polypyrrole coating layer grafted with oleic acid to obtain an aluminum powder pigment coated with polypyrrole-oleic acid. Then it is made into a color paste, and then mixed evenly with film-forming substances, solvents, rheological additives, wetting and dispersing agents, and cellulose acetate butyrate to prepare an acid-resistant metallic flash coating for automobile shells. Compared with the traditional method, in the metal flash paint prepared by the present invention, the dispersibility of aluminum powder in the organic coating is good, the bonding strength of the two-phase interface is high, the parallel orientation and orientation arrangement of the aluminum powder, and the angle-dependent heterochromatic effect of the coating The index is high, and the coating has excellent acid resistance.

Description

technical field [0001] The invention belongs to the technical field of automobile coatings, and provides an acid-resistant metallic flash coating used for automobile casings and a preparation method thereof. Background technique [0002] The rapid development of the economy and the rapid rise of the automobile industry have made automobiles a common means of transportation for people. The automotive industry has a huge demand for automotive coatings. In addition to high requirements on the variety and conventional performance of coatings, it is also required to have unique coating performance and construction performance. Therefore, automotive coatings have become a special coating. [0003] The appearance, gloss and other aspects of the coating film of automotive coatings are the direct evaluation factors of the quality of the car, which determines the grade of the car. The metal coating on the surface of the car has a gorgeous metallic feel, colorful randomness, high glos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D201/00C09D5/08C09D7/62
CPCC08K2003/0812C09D5/08C09D201/00C09D7/62C08K9/10C08K3/08
Inventor 蔡杰
Owner 清远骑士涂料有限公司
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