Coating processes – Magnetic base or coating – Magnetic coating
Patent
1989-07-14
1991-01-01
Thurlow, Jeffery
Coating processes
Magnetic base or coating
Magnetic coating
264 24, 264 402, 264108, 264134, 264171, 264211, 427 48, B05D 512, B32B 700, B32B 3100
Patent
active
049817191
ABSTRACT:
An improved process for the production of a magnetic recording material including a non-magnetic layer support and, cast thereon, a magnetic dispersion including a mixture of at least two different batches of finely divided magnetic pigments finely dispersed in a polymeric binder is characterized in that the magnetic pigment batches are separately finely dispersed in a polymeric binder and/or a dispersion aid and/or a solvent until the necessary degree of dispersion is reached, after which they are combined, optionally provided with further additives and applied to the layer support, the degree of dispersion of the magnetic dispersions preferably being continuously determined by a colorimetric arrangement.
REFERENCES:
patent: 3622386 (1971-11-01), Larsen
patent: 3649541 (1972-03-01), Ingersoll
patent: 3653962 (1972-04-01), Akashi et al.
patent: 3824128 (1974-07-01), Akashi et al.
patent: 4368237 (1983-01-01), Yamada et al.
patent: 4407901 (1983-10-01), Miyatsuka et al.
patent: 4444850 (1984-04-01), Matsufuji et al.
patent: 4465608 (1984-08-01), Gerum et al.
patent: 4465737 (1984-08-01), Miyatuka et al.
patent: 4581246 (1986-04-01), Melzer et al.
patent: 4716076 (1987-12-01), Morioka et al.
patent: 4812330 (1989-03-01), Ishikuro et al.
Saunders, J. H. et al., "Polyurethanes Chemistry and Technology", in: High Polymers (New York, Interscience, 1962), pp. 17-29.
Technologie der Magnet Bandherstellung (Berlin, Akademie-Verlag, 1981), pp. 204-231.
Credner Hans-Heinrich
Gerum Johannes
Schulz Horst
Wimbersky Werner
Agfa-Gevaert Aktiengessellschaft
Tentoni Leo B.
Thurlow Jeffery
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