Polyurethane resin binder for magnetic recording mediums compris

Details Polyurethane resin binder for magnetic recording mediums compris Polyurethane resin binder for magnetic recording mediums compris

1990-04-26

1992-06-23

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...

528 58, 528 71, 528 85, 360134, 360135, C08G 1844

Patent

active

051244241

ABSTRACT:
A binder for a magnetic recording medium comprising a hydroxy-group-terminated polyurethane resin prepared by reaction of a polycarbonate-polyol, a chain-extender, and an organic diisocyanate; (A) said polycarbonate-polyol comprising poly(cyclohexane-1,4-dimethanol carbonate)-polyol as a constituting component in an amount of from 20 to 80% by weight, and (B) said chain-extender being a compound having a molecular weight of not more than 1,000 and having two or more amino or hydroxyl groups in the molecule.

REFERENCES:
patent: 4024113 (1977-05-01), Ammons

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