Epoxy paint for automobile leaf springs and preparation method thereof

Abstract

The invention discloses epoxy paint for automobile leaf springs. The paint comprises the following raw materials in parts by weight: 0.7-1 part of fatty acid polyethylene glycol ester, 0.4-1 part of triethanolamine, 0.8-1 part of sodium pyrophosphate, 1-2 parts of zinc ricinate, 7-9 parts of 2-hydroxyethyl methacrylate, 0.8-1 part of phosphoric pentoxide, 2-3 parts of 4-methoxyphenol, 0.6-2 parts of tetrabutylammonium bromide, 17-20 parts of acrylic acid, 6-8 parts of methyl methacrylate, 140-150 parts of epoxy resin E-5, 0.07-0.1 part of ammonium persulfate, 2-3 parts of sodium bicarbonate, 0.6-1 part of sodium dodecyl benzene sulfonate, 0.1-0.13 part of N,N-diethylaniline, 1-2 parts of 2-mercapto benzimidazole, 2-3 parts of barium stearate, 4-5 parts of dimethyl nylon acid, and 6-7 parts of bentonite. The paint has low cost, and solves the problems of large 'falling amount' of the automobile leaf springs in the prior art without environmental protection, and bad antirust capability.

Description

technical field [0001] The invention relates to the technical field of anticorrosion coatings, in particular to an epoxy automobile leaf spring coating and a preparation method thereof. Background technique [0002] Acrylic monomers are often used in the polymerization process of water-based acrylic resins. Due to the presence of hydrophilic carboxyl groups on acrylic acid, the stability of polymer emulsions is enhanced. Under dry film conditions, carboxyl groups can closely adhere to the substrate Together, the adhesion between the coatings is greatly improved; but in a humid environment, because the carboxyl group on the acrylic acid is hydrophilic, the association with water is very strong, and the water molecules are easily absorbed into the coating and the metal through the capillary. In the interface, the force between the carboxyl group and the surface of the metal substrate is greatly reduced, the adhesion in the wet state is poor, and the water resistance is reduced...

AI Technical Summary

Problems solved by technology

If the coating is too thin, the general coating has poor antirust performance and is not enough to protect the automobile leaf spring, which requires the new coating to have the highest possible antirust performance under the condition of a thinner coating

At present, the coatings of automobile leaf springs at home and abroad are relatively thick, and there are more or less damages caused by too thick extrusion during the coating assembly process. These damages will further become corrosion spots, which seriously affect the coating quality of automobile leaf springs. Quality, improving the rust resistance of the coating per unit thickness as much as possible is gradually becoming a problem that needs to be solved urgently