Light-colored alcohol-base paint

Abstract

The light color alcohol-base paint is compounded with zirconite powder 15-25 wt%, brown alumina powder 20-35 wt%, mullite powder 5-15 wt%, flaky graphite powder10-25 wt%, forsterite powder 5-10 wt%, binder 2-4 wt%, suspending agent 15-25 wt%, assistant 0.01- 0.2 wt% and solvent 15-30 wt%. The light color alcohol-base paint has less pollution, low cost, capacity of preventing crack in sand model and capacity of avoiding molten iron permeation and sand fusion to raise casting quality.

Description

(1) Technical field [0001] The invention relates to a paint, in particular to a low-pollution, low-cost, light-colored alcohol-based paint. (2) Background technology [0002] Casting coatings are composed of refractory aggregates, binders, suspending agents, additives and solvents, among which refractory aggregates are the main part of the coating, and its physical and chemical properties determine the anti-sand sticking effect of the coating. Its selection depends on the type of casting metal and molding material. For iron castings, graphite powder was used as aggregate before the 1950s. played an important role. Graphite is a kind of carbon material. Natural graphite has two forms: amorphous earthy graphite powder and crystalline flake graphite. The price of earthy graphite powder is cheap, but its refractoriness is low, and it is easy to burn. It starts to oxidize at 500°C, and has a large amount of gas generation. It is not effective for anti-sticking sand of large iro...

AI Technical Summary

Problems solved by technology

However, simply using soil-like graphite powder cannot play the role of anti-sticking sand, because a large amount of burning of soil-like graphite powder at high temperature can produce many voids in the coating layer to absorb expansion, resulting in a gap between the coating and the sand mold. large differences in expansion values ​​between and the appearance of cracks