Primer-topcoat high-weather-resistance cathode electrophoretic paint and preparation method thereof

Abstract

The invention discloses primer-topcoat high-weather-resistance cathode electrophoretic paint and a preparation method thereof. According to emulsion of the cathode electrophoretic paint, hydrogenated bisphenol A epoxy resin with the molecular weight of 372-376 and hydrogenated bisphenol A are subjected to a chain extension reaction under the action of a catalyst and then subjected to amination ring opening, a curing agent, a light stabilizer or/and an ultraviolet light absorber are added, and steps of neutralizing and emulsifying are carried out to obtain the product. A color paste is prepared by mixing sulfhydrylation grinding resin or quaternary ammonium salinization grinding resin, pigment filler and auxiliaries, The one-time paint film thickness of the cathode electrophoretic paint prepared from the emulsion, color paste and pure water can reach 60 [mu]m, the cathode electrophoretic paint has high leveling degree, the traditional coating process 2C2B is optimized, the problem is solved by directly adopting a 1C1B process, namely electrophoresis and baking, and the coating cost is saved; and meanwhile, the primer-topcoat high-weather-resistance cathode electrophoretic paint also has salt spray resistance and surface ultraviolet aging resistance, and also has the anti-rust function, ultraviolet stability and weather resistance of the primer-topcoat high-weather-resistance cathode electrophoretic paint.

Description

technical field [0001] The invention relates to the technical field of cathodic electrophoretic paint, in particular to a highly weather-resistant cathodic electrophoretic paint with integrated bottom and surface and a preparation method thereof. Background technique [0002] Construction machinery, agricultural machinery, etc. have high requirements for appearance decoration and weather resistance. At present, the weather-resistant cathodic electrophoretic paint technology with integrated bottom and surface has become mature and is widely used in axles and some auto parts. However, the market Most of the products on the market are black or gray, and it is difficult to meet the decoration requirements and weather resistance performance requirements of construction machinery and agricultural machinery for the weather-resistant cathodic electrophoretic paint integrated with the bottom surface. Contents of the invention [0003] In order to solve the above-mentioned technical...

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Problems solved by technology

[0002] Construction machinery, agricultural machinery, etc. have high requirements for appearance decoration and weather resistance. At present, the weather-resistant cathodic electrophoretic paint technology with integrated bottom and surface has become mature and is widely used in axles and some auto parts. Ho

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