Magnetic Particle Surface Modification for Coating Dispersion

The invention creates a composite structure by combining the binder with magnetic particles through chemical bonding. The binder contains multiple functional groups that chemically attach to magnetic particle surfaces, forming a stable composite material. This composite approach ensures uniform particle distribution and prevents aggregation, resolving the contradiction between dispersion improvement and particle size uniformity.

The invention performs preliminary action by pre-modifying the magnetic particle surfaces with binder molecules before the actual dispersion process. The binder's functional groups chemically bond to the particle surfaces in advance, creating a protective layer that prevents aggregation. This preliminary surface modification eliminates the need for intensive dispersing conditions, significantly reducing dispersion time and avoiding mechanical damage to particles.

The invention creates a composite material where binder molecules are chemically bonded to microparticulate magnetic material surfaces. The binder's functional groups (carboxyl, hydroxyl, or amine) form stable chemical bonds with the particle surfaces, creating a composite structure that maintains the small particle size while preventing aggregation. This composite approach ensures that microparticles remain dispersed and are added to the coating liquid in their microparticulate form, not as coarse aggregates.