Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Physical dimension specified
Patent
1983-06-17
1985-03-05
Silverman, Stanley S.
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Physical dimension specified
360134, 360135, 360136, 252 6254, 427128, 4284231, 4284237, 428480, 428522, 428694, 428900, G11B 570
Patent
active
045031207
ABSTRACT:
A magnetic recording medium which comprises a non-magnetic support having thereon a magnetic recording layer containing a ferromagnetic fine powder and a binder as main components is disclosed. The magnetic recording layer containing as the binder (1) a vinyl chloride-vinyl acetate-maleic acid copolymer which has a mean polymerization degree of about 300 to about 400 and a maleic acid fraction of about 0.6 to about 1.5 wt %, (2) a polyurethane resin which has a number average molecular weight of 40,000 to 100,000 and is prepared from (i) a mixture of polyneopentyladipate having a mean molecular weight of 500 to 2,500 and polybutyleneadipate having a mean molecular weight of 500 to 2,500 with a mixing ratio of the former to the latter of from 2/8 to 9/1 by weight and (ii) diphenylmethane diisocyanate, and optionally (3) a low molecular weight polyisocyanate compound.
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patent: 4352859 (1982-10-01), Yoda et al.
patent: 4400435 (1983-08-01), Yoda et al.
patent: 4431700 (1984-02-01), Yamada et al.
patent: 4431712 (1984-02-01), Matsufuji et al.
patent: 4454202 (1984-06-01), Komine et al.
Funabashi Shinichi
Kiyama Masatoshi
Tsuji Nobuo
Yamada Yasuyuki
Yamauchi Koichi
Fuji Photo Film Co. , Ltd.
Silverman Stanley S.
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