Magnetic recording media dispersants

Details Magnetic recording media dispersants Magnetic recording media dispersants

1987-07-10

1988-09-13

Robinson, Ellis P.

Stock material or miscellaneous articles

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Of inorganic material

427 44, 427 541, 427128, 427131, 428695, 428900, 428704, 252 6254, G11B 571

Patent

active

047709529

ABSTRACT:
Reactive dispersants for magnetic recording media are prepared by sequentially phosphating and esterifying or esterifying and phosphating alkoxylated alcohols having at least two carbon atoms and at least two hydroxyl groups. The phosphating agent can be phosphorus oxychloride while the esterifying agent can be acrylic acid.

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patent: 3957918 (1976-05-01), Dickie
patent: 4382135 (1983-05-01), Sinka
patent: 4515930 (1985-05-01), Omura
patent: 4526837 (1985-07-01), Ohtsuki
patent: 4540627 (1985-09-01), Ishizawa
patent: 4556604 (1985-12-01), Ohbayashi et al.
patent: 4663184 (1987-05-01), Hegel

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