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:
Sep. 20, 1983
Filed:
Nov. 15, 1982
Bruce F Blumentritt, Rochester, MN (US);
John C Shyan Shen, Rochester, MN (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A magnetic recording disk coating having a high density of magnetic particles uniformly dispersed in a high performance, thermoset polyurethane resin binder with the dispersion applied as a thin coating onto a rigid substrate. The thermosetting resin binder comprises a blocked isocyanate polymer reacted with hydroxy terminated or branched oligomer or oligomers. The coating composition has an extended shelf life and can be cured at temperatures below 375.degree. F. to produce a smooth, hard, tough durable and well dispersed magnetic coating with an improved orientation ratio that readily accepts buffing, washing, and lubrication.