Patent · US Expired

Magnetic recording media

US3996407A · kind A · utility

12Cited by

10References

8Claims

0Family size

Assignee

BASF SE

Inventors

Egon Von Gross · Amilly, FR
Heinz Stritzinger · Ludwigshafen, DE
Job-Werner Hartmann · Ludwigshafen, DE
Manfred Steuerwald · Bischofswerda, DE
Ursula Klein
Dieter Schaefer

Key dates

Filing date	Dec 18, 1974
Grant date	Dec 7, 1976
Priority date	—
Expiry date	Dec 18, 1994

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31667
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

Magnetic recording media comprising a non-magnetizable flexible base and a firmly adhering magnetic coating based on a dispersion, containing a silane, of a magnetic pigment in a polymeric binder, and a process for their manufacture. The silane is an aminoalkylsilane R.sub.n Si(OR').sub.4-n, wherein n is 1, 2 or 3, R' is alkyl of 1 to 8 carbon atoms and R is aminoalkyl of the formula with one or more primary and/or secondary amino groups and from 3 to 11 carbon atoms. Magnetic recording media comprising a magnetic coating containing such a silane exhibit better abrasion resistance and better electromagnetic properties than comparable coatings.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.