Coating processes – Magnetic base or coating
Patent
1990-02-07
1991-02-19
Pianalto, Bernard
Coating processes
Magnetic base or coating
427128, 427130, 427131, 4272551, 4272554, 427340, 427400, H01F 1002
Patent
active
049943049
ABSTRACT:
A method of increasing the hardness of a polyurethane medium containing a polyisocyanate, such as a magnetic tape or disk, by contacting the medium with an aldehyde and an acid.
REFERENCES:
patent: 3366505 (1968-01-01), Bisschops et al.
patent: 4324177 (1982-04-01), Tsuji et al.
patent: 4515828 (1985-05-01), Economy et al.
patent: 4642242 (1987-02-01), Solomon
Verdone Joseph A.
Yudelson Joseph S.
Eastman Kodak Company
Pianalto Bernard
Wells Doreen M.
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