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Title:
BINDER FOR MAGNETIC RECORDING MATERIAL
Document Type and Number:
Japanese Patent JPS63173223
Kind Code:
A
Abstract:

PURPOSE: To improve the dispersibility of magnetic powder by incorporating the urethane oligomer contg. an amino group and a carboxyl group into the binder as the essential component.

CONSTITUTION: The urethane oligomer contg. an amino group and a carboxyl group is incorporated as the essential component. In this case, the urethane oligomer is composed of a polyisocyanate and the hydroxyl component consisting of a mono-ol contg. an amino group and/or a polyol, a mono-ol contg. a carboxyl group and/or a polyol, and, if necessary, a polyol not contg. an amino group and a carboxyl group. As a result, a magnetic powder is excellently dispersed, and the electromagnetic transducing property of the obtained magnetic recording material is remarkably improved.


Inventors:
MAEDA TETSUO
Application Number:
JP687687A
Publication Date:
July 16, 1988
Filing Date:
January 13, 1987
Export Citation:
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Assignee:
SANYO CHEMICAL IND LTD
International Classes:
G11B5/702; C09D5/23; C09D175/00; C09D175/12; C09D175/14; (IPC1-7): G11B5/702
Domestic Patent References:
JPS56124119A1981-09-29
JPS58153230A1983-09-12
JPS6063222A1985-04-11