Anti-corrosion paint for low heavy metal automobile parts and method for preparing same

Abstract

The invention relates to an anti-corrosion paint for low heavy metal automobile parts and a method for preparing the same, wherein the anti-corrosion paint comprises the following components in part ratio(part): 30 to 40 parts of resin specially used for an anti-corrosion primer, 10 to 20 parts of zinc phosphate, of which the zinc content is lower than 20mg / kg, 10 to 20 parts of solution of nitrocotton resin, 5 to 15 parts of talc powder, 5 to 10 parts of calcium carbonate, 3 to 6 parts of carbon black, 3 to 6 parts of anti skinning agent, 0.5 to 1.0 part of dispersing agent YB-201A, 20 to 35parts of mixed solvent, 0.5 to 1 part of anti-settling agent bentonite, 0.3 to 0.6 part of defoaming agent and 3 to 5 parts of dryer; and the preparation method comprises the following steps of: adding the raw materials in a stirring container in sequence and evenly stirring, dispersing the mixture at a high speed, grinding the mixture by grinding equipment until the fineness of the mixture is below 35mum, and adding the solution of nitrocotton resin, the dryer and the mixed solvent and evenly stirring. The anti-corrosion paint has the advantages of having excellent adhesive force, covering force, decorative property, stability and construction application, withstanding salt fog for 600 hours, meeting higher use requirements on environmental protection and also meeting the requirements oflimiting amount of four types of soluble heavy metals in the national mandatory standards.

Description

technical field [0001] The invention belongs to chemical coatings and paints, and in particular relates to a low-heavy metal anti-corrosion paint for automobile parts and a preparation method thereof which is mainly used in automobiles and industrial parts with high environmental protection requirements. Background technique [0002] Auto parts anticorrosion paint can meet the requirements of general industrial anticorrosion, that is, good physical and chemical properties, salt spray resistance up to 200-300 hours, but higher requirements for salt spray resistance (such as salt spray resistance 600 hours) and heavy metal content in line with national standards Compulsory standard limit requirements and other performance, ordinary auto parts anti-corrosion paint can not meet the requirements. The anticorrosion paint for ordinary auto parts is generally composed of resin, antirust pigments, fillers, additives, etc., and the salt spray resistance can reach 200-300 hours. Howev...

AI Technical Summary

Problems solved by technology

However, the selected anti-rust pigments generally have excessive lead content, which makes the lead content of ordinary auto parts anti-corrosion paint far greater than ≥ 90mg / kg