Epoxy grafted graphene finish paint for new energy automobile and preparation method of epoxy grafted graphene finish paint

Abstract

The invention discloses epoxy grafted graphene finish paint for a new energy automobile. The epoxy grafted graphene finish paint is prepared from an ingredient A and an ingredient B according to a mass ratio of (10 to 12):1. Firstly, graphene is subjected to acidification treatment in concentrated nitric acid; then, formed carboxyl is subjected to acylating chlorination by thionyl chloride, and then takes an acylation reaction with ethylene glycol, so that hydroxy is introduced on a graphene surface; next, stearic acid is grafted by using dimethyl formamide as a solvent; a grafting matter capable of being effectively dispersed among epoxy resin is obtained. The epoxy finish paint has good corrosion resistance, excellent outdoor durability and high adhesive force; the surface hardness of the finish paint is good; the scratch resistance performance is high; the stability is good; the falling cannot easily occur; the comprehensive performance is excellent.

Description

technical field [0001] The invention belongs to the field of energy automobile topcoats, and in particular relates to an epoxy-grafted graphene topcoat for new energy automobiles and a preparation method thereof. Background technique [0002] General automotive paint has the functions of protection and beautiful decoration, such as high gloss, high weather resistance, gorgeous decoration, strong corrosion resistance, long-term color retention, mechanical collision resistance, scratch resistance, gasoline, engine oil resistance, acid rain resistance, Bird droppings, etc. Most of the current car paints use epoxy topcoats. The existing epoxy topcoats generally have poor weather resistance and cannot be exposed to the outdoors. They can only be used as primers. Long time and high cost. These deficiencies are due to the fact that epoxy resin contains unstable benzene rings, and the double bond breaks under the irradiation of ultraviolet rays to cause pulverization. When painting...

AI Technical Summary

Problems solved by technology

[0002] General automotive paint has the functions of protection and beautiful decoration, such as high gloss, high weather resistance, gorgeous decoration, strong corrosion resistance, long-term color retention, mechanical collision resistance, scratch resistance, gasoline, engine oil resistance, acid rain resistance, Bird droppings, etc. Most of the current car paints use epoxy topcoats. The existing epoxy topcoats generally have poor weather resistance and cannot be exposed to the outdoors. They can only be used as primers. Long time and high cost

These deficiencies are due to the fact that epoxy resin contains unstable benzene rings, and the double bond breaks under the irradiation of ultraviolet rays to cause pulverization. When painting, it needs to be sprayed with a matching weather-resistant topcoat, which requires at least two constructions, and each time It takes a certain amount of time for the paint to dry;