Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Including a second component containing structurally defined...
Patent
1994-12-09
1997-04-01
Kiliman, Leszek
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Including a second component containing structurally defined...
428328, 428329, 428330, 428402, 428403, 428332, 428336, 428694B, 428694BN, 428694BC, 428694ST, 428694SL, 428900, 427127, 427128, 427130, G11B 566, B32B 516
Patent
active
056164106
ABSTRACT:
The present invention provides a magnetic recording medium comprising, on a non-magnetic substrate, a magnetic layer containing magnetic fine powder and a binder, wherein the magnetic layer contains alumina powder having an average particle size of at most 1 .mu.m and containing at least one oxide of element selected from the group consisting of Ge, P, Sn, Nb, Ta, Mo and W in an amount of 0.1 to 10 parts by weight per 100 parts by weight of alumina. The magnetic recording medium of the present invention has good durability and good abrasion resistance of the magnetic layer, and good magnetic characteristics, good surface smoothness and a good cleaning effect on a magnetic head.
REFERENCES:
patent: 4741952 (1988-05-01), Aoyama
patent: 4756962 (1988-07-01), Takamatsu
patent: 4917947 (1990-04-01), Koshe
patent: 5110774 (1992-05-01), Ogura
patent: 5141807 (1992-08-01), Umezaki
Patent Abstracts of Japan vol. 12, No. 566 (P-976) 15 Dec., 1989 and JP-A-01 236 426 (Hitachi Maxell Ltd) 21 Sep. 1989, abstract only.
Patent Abstracts of Japan vol. 13, No. 353 (P-913) (3701) 8 Aug. 1989 and JP-A-01 112 523 (Hitachi Maxell Ltd) 1 May 1989, abstract only.
Patent Abstracts of Japan vol. 13, No. 85 (P-834) (3433) 27 February 1989 and JP-A-63 268 118 (Fuji Photo Film Co Ltd.) 4 Nov. 1988, abstract only.
Sugimoto Shoji
Takeuchi Yoshiaki
Umezaki Hiroshi
Kiliman Leszek
Sumitomo Chemical Company Limited
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