Grapheme-oxide-contained reinforced water-based paint which can form a film easily and used for evaporative pattern casting and preparation method for grapheme-oxide-contained reinforced water-based paint

Abstract

The invention relates to the technical field of evaporative pattern casting, in particular to grapheme-oxide-contained reinforced water-based paint which can form a film easily and is used for evaporative pattern casting and a preparation method for the grapheme-oxide-contained reinforced water-based paint. According to the paint, high-alumina bauxite and quartz sand with different particle diameters serve as refractory aggregates, so that the breathability of a coating is improved. The mixed slurry of nanometer attapulgite and sodium carboxymethylcellulose serves as efficient composite suspending agents. Added grapheme oxide can be well dispersed in a solution, so that the film-forming property of the paint on the surface of a plastic pattern is improved. After carnauba wax is dispersed in the coating, the flatness of the surface of the coating is improved, and the sand prevention viscosity is improved. Besides, the carnauba wax can be melted rapidly during casting, so that the breathability of the coating is improved further. The prepared paint is easy to smear and adhere and high in utilization rate. The formed film is firm and tenacious. The dried coating is compact, breathable, good in mechanical property, not prone to sticking to sand and easy to strip after casting, does not pollute molten metal, and effectively improves the quality of a casting.

Description

technical field [0001] The invention relates to the technical field of lost foam casting, in particular to a water-based coating for easy film-forming enhanced lost foam casting containing graphene oxide and a preparation method thereof. Background technique [0002] The coating for lost foam refers to a layer of special coating coated on the outer surface of the pattern during the lost foam casting process. It plays a key role in the casting process. Since the pattern is made of foam plastic, the gas permeability of the coating , coating strength, rheology and other properties will have a crucial impact on the casting product. The lost foam coating with excellent performance should meet: (1) It can help improve the strength and rigidity of the foam plastic pattern and prevent the pattern from being damaged and deformed. (2) It has the function of isolation, which separates the molten metal from the model, prevents the molten metal from penetrating into the dry sand, and pre...

AI Technical Summary

Problems solved by technology

[0003] The composition of lost foam coatings mainly includes refractory aggregates, adhesives, solvents, suspending agents and various additives. According to the nature of the binder used, it is mainly divided into water-based coatings, alcohol-based coatings, resin coatings, etc. Among them, water-based coatings are widely used in actual production because of their low cost. However, water-based coatings are easy to collapse and stick to sand when the coating is cleaned, and most of the products still have defects in the performance of the products. described effect