Patent ID: 6375885
Filing Date: 2002-04-23
Classification: B03C,B82Y,C23C,C25B,C25D,G21F,H01F,H01M,Y02E,Y10T

Abstract:
A method for forming a graded density magnetic composite, comprising:contacting a surface with a composition comprising a magnetic material to form a magnetic material coated surface; applying to the magnetic material coated surface at least a first polymer solution comprising at least one polymer, having a first concentration, and a first solvent, and evaporating the first solvent to form a first polymer coating on said magnetic material coated surface; applying to the first polymer coating a second polymer solution comprising at least one polymer, having a second concentration different from the first polymer solution concentration, and a second solvent, and evaporating the second solvent to form a second polymer coating on the first polymer coating, and thereby yield the graded density magnetic composite.