Anti-corrosion waterproof coating for evanescent mode

Abstract

The invention discloses an anti-corrosion waterproof coating for an evanescent mode. The anti-corrosion waterproof coating is characterized by consisting of the following components in parts by weight: 30-40 parts of an ethylene-vinlacetate copolymer, 20-30 parts of polyisocyanate, 18-22 parts of bisphenol-A epoxy resin, 8-12 parts of ammonium polyphosphate, 8-12 parts of perchloro-ethylene resin, 8-15 parts of pentaerythritol, 2-4 parts of methylene dual-methyl naphthalene sulfonic acid sodium, 0.6-0.8 part of melamine, 4-6 parts of methyl cellulose, 2-4 parts of a preservative, 1.5-2 parts of antimonous oxide, 3-5 parts of a filler and 25-35 parts of a solvent. The prepared coating has an elastic effect, can effectively prevent a coating layer from being cracked, has a good flame retardant effect, and is high in adhesive force and excellent in corrosion resistance.

Description

technical field

[0001] The invention belongs to the technical field of coatings, and in particular relates to a corrosion-resistant and fire-resistant coating for lost foam. Background technique

[0002] The refractory coating used for lost foam casting is finally coated on the surface of the foam plastic model. Different types of foam plastics and different casting materials have different requirements for coating performance. In addition, foam plastic is airtight, has a low heat distortion temperature (about 70°C), has a low affinity for water, and has a large amount of gas after gasification. These characteristics determine that the refractory coating coated on its surface should meet the following technical requirements: The coating has a certain degree of air permeability.

[0003] From the point of view of preventing sand sticking of castings, the surface of the foam model must be coated with paint, and the coating should be as dense as possible; but the dense coatin...