Patent · US Expired

Magnetic lacquer dispersions, process for their production and their use

US4853289A · kind A · utility

0Cited by

6References

11Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Peter Schick · Eßlingen, DE
Friedrich Jonas · Aachen, DE
Lutz Leitner · Krefeld, DE

Key dates

Filing date	Sep 8, 1987
Grant date	Aug 1, 1989
Priority date	—
Expiry date	Sep 8, 2007

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/30
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

An improved magnetic dispersion for magnetic recording which comprises magnetic pigment, abrasive, carbon black or another additive for regulating conductivity, binder, solvent, lubricant, and wetting agent, wherein the improvement comprises quantities of wetting agent, lubricant, or both being between at least 100 to 140% of the individually determined saturation adsorptions of the wetting agent and lubricant, with the proviso that the minimum quantity of wetting agent or lubricant is 80% of the individually determined saturation adsorption.

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