Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From reactant having at least one -n=c=x group as well as...
Patent
1989-10-24
1991-08-06
Welsh, Maurice J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From reactant having at least one -n=c=x group as well as...
252 6254, 428694, 428900, 528 73, C08G 1830
Patent
active
050379348
ABSTRACT:
A magnetic coating formulation is composed principally of magnetic particles and a binder. At least a portion of the binder is a polyurethane resin synthesized from a reactant mixture of specific phosphorus compound, epoxy compound, isocyanate compound and polyfunctional hydroxy compounds. The reactant mixture may optionally contain a chain extender. The polyurethane resin contains one phosphoric acid group or one residual group derived from phosphoric acid per 3,000-200,000 number average molecular weight of the polyurethane resin, and has a number average molecular weight of 4,000-150,000. A magnetic recording medium with a magnetic coating layer formed from the magnetic coating formulation is also disclosed. The magnetic coating layer features not only excellent dispersion of magnetic particles, in other words, excellent magnetic characteristics but also superb durability.
REFERENCES:
patent: 3350478 (1967-10-01), Cherbuliez et al.
patent: 3350479 (1967-10-01), Cherbuliez et al.
patent: 3350480 (1967-10-01), Cherbuliez et al.
patent: 3350481 (1967-10-01), Cherbuliez et al.
patent: 3365531 (1968-01-01), Cherbuliez et al.
patent: 3373231 (1968-03-01), Cherbuliez et al.
patent: 3374294 (1968-03-01), Cherbuliez et al.
Hosokawa Shigeo
Jimbo Shinichiro
Yasuda Masahiko
Yokomori Yorozu
B. F. Goodrich Company
Hudak Daniel J.
Kyowa Hakko Kogyo Co. Ltd.
Pawl Debra L.
Welsh Maurice J.
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