Water-based paint with paint film capable of being adsorbed by magnet and preparation method of water-based paint

Abstract

The invention discloses a water-based paint with a paint film capable of being adsorbed by a magnet and a preparation method of the water-based paint. The water-based paint is prepared from the following components in parts by weight: 200 to 280 parts of pure water, 300 to 500 parts of water-based varnish emulsion, 5 to 10 parts of a dispersing agent, 10 to 20 parts of a defoaming agent, 200 to 300 parts of nano magnetic composite filler, 2 to 6 parts of organic bentonite, 5 to 8 parts of a thickening agent and 30 to 30 parts of a coalescing agent. The nano magnetic composite filler is added, so that the traditional metal filler is more uniformly dispersed in the coating, the phenomenon that the surface of a coating is lack of conductive metal particles due to the fact that a large amount of metal powder filler is settled when the coating is formed through curing is avoided, connection of the conductive particles in the coating is increased through a graphene sheet structure, and more conductive channels are formed, so the conductivity of the surface of the coating is improved; the lithium silicate aqueous solution, the water glass and the magnesium oxide are also added, so that the magnetic coating has relatively good mechanical property, physical and chemical stability and the like, and the high-temperature resistance of the magnetic coating is improved.

Description

technical field [0001] The invention relates to a water-based paint, in particular to a water-based paint whose paint film can be absorbed by a magnet and a preparation method thereof, belonging to the technical field of paint. Background technique [0002] All coatings that use water as a solvent or as a dispersion medium can be called water-based coatings. According to the type of binder in the coating, water-based coatings are divided into two categories: natural water-based coatings of natural substances or minerals (such as potassium silicate) Petrochemical water-based coatings with artificial synthetic resins (such as acrylic resins). Water-based coatings include water-soluble coatings, water-diluted coatings, and water-dispersible coatings (latex coatings). Water-soluble coatings use water-soluble resins as film-forming materials. , represented by polyvinyl alcohol and its various modified products, in addition to water-soluble alkyd resin, water-soluble epoxy resin a...

AI Technical Summary

Problems solved by technology

[0003] Magnetic paint is a kind of water-based paint, which is a paint coated on a plastic tape base. It is composed of magnetic powder, film-forming base material, additives, solvents, etc. As the needle-shaped iron oxide magnetic fine powder passes through the magnetic head core When working in the gap, the needle-shaped magnetic powder is magnetized and arranged in an orderly manner to form a permanent magnet, making it the magnetic state of the magnetic coating. The existing magnetic coatings add different magnetic powders to the film-forming base material, so that the coating made It has a magnetic shielding effect, but the magnetic strength of the magnetic coating is limited simply by adding magnetic powder, which cannot effectively shield the electromagnetic field. At the same time, the dispersion effect of the magnetic powder is not good, and the sedimentation is serious, resulting in uneven mixing. The film-forming base material is composed of a single resin, the composition is relatively single, and its high temperature resistance effect is poor, resulting in the magnetic coating supported by the high temperature will further reduce the magnetic strength of the magnetic coating, thereby reducing its shielding effect