The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 24, 1978
Filed:
Apr. 01, 1976
Kazuo Ogasa, Tama, JA;
Seiya Ogawa, Yokohama, JA;
Fujitsu Limited, , JA;
Abstract
A magnetic recording medium having finely divided magnetic metal oxide particles dispersed in a thermosetting resin binder and a thickness of no greater than 5 microns is provided. The thermosetting resin binder comprises: (a) 30 to 95 wt.% of a copolymer of 25 to 65 wt.% of alkyl acrylate or alkyl methacrylate, 3 to 30 wt.% of N-methylolacrylamide or N-alkoxymethylacrylamide and 10 to 60 wt.% of styrene or a methyl styrene, (b) 5 to 70 wt.% of an epoxy resin predominantly comprised of a condensation product of bisphenol A and epihalohydrin, and; (c) 0 to 50 wt.% of phenolic resin or amino resin. The magnetic recording medium is superior in abrasion resistance, solvent resistance and dispersion of the magnetic material therein, and possesses improved recording density.