MAGNETIC PARTICLES COATED WITH FERRITE AND PROTECTED WITH POLYMER COATING, AND PREPARATION THEREOF

Title:

MAGNETIC PARTICLES COATED WITH FERRITE AND PROTECTED WITH POLYMER COATING, AND PREPARATION THEREOF

Document Type and Number:

Japanese Patent JPH0782302

Kind Code:

A

Abstract:

PURPOSE: To produce a material highly suited for medical and other fields by protecting, by polymer coating, the surfaces of resin core particles coated with fine ferrite particles to improve the stability and, in particular the resistance to acid, of the magnetic particles.

CONSTITUTION: The magnetic particles are resin core particles coated with fine ferrite particles, which are protected with a polymer of radical- polymerizable unsaturated monomers which may contain a glycidyl group, where the ferrite-coated resin particles are further coated with the polymer of the monomers polymerized over the particle surfaces with the aid of a double salt of a cationic surfactant and a polymerization initiator.

Inventors:

SASAKI MOTOHIRO
YOSHIOKA KATSUAKI
NAGAI KATSUTOSHI

Application Number:

JP16728694A

Publication Date:

March 28, 1995

Filing Date:

July 20, 1994

Export Citation:

Click for automatic bibliography generation Help

Assignee:

NIPPON PAINT CO LTD

International Classes:

A61K9/50; A61K49/00; B01J13/02; B01J13/14; C01G49/00; C08F2/00; G01N33/553; H01F1/00; H01F1/11; H01F10/20; H01F41/16; (IPC1-7): C08F2/00; A61K9/50; A61K49/00; B01J13/02; B01J13/14; C01G49/00; G01N33/553; H01F1/00; H01F10/20; H01F41/16

Attorney, Agent or Firm:

Hajime Tsukuni (1 person outside)

Next Patent: 発光素子駆動装置