Magnetic recording media

Details Magnetic recording media Magnetic recording media

1985-07-26

1987-05-19

Robinson, Ellis P.

Stock material or miscellaneous articles

Composite

Of polyamidoester

252 6254, 427 44, 427128, 428694, 428900, G11B 5702

Patent

active

046667814

ABSTRACT:
Magnetic recording media comprising a non-magnetic substrate and a magnetic layer comprising a finely divided magnetic material dispersed in an organic solvent soluble, crosslinkable, essentially linear, thermoplastic polyurethane which possesses acrylate side and terminal groups wherein said polyurethane is prepared by reacting poly- and/or diisocyanates with a mixture of (a) methacrylate - or acrylate - diols having molecular weights of from 146 to 3,000, (b) monoesters of methacrylic or acrylic acid and a diol having a molecular weight of from 116 to 300, and (c) other organic polydiol compounds which have molecular weights of from 400 to 5,000.

REFERENCES:
patent: 2824851 (1958-02-01), Hall et al.
patent: 3373075 (1968-03-01), Fekete et al.
patent: 3836492 (1974-09-01), Watanabe et al.
patent: 4004997 (1977-01-01), Tsukamoto
patent: 4328282 (1982-05-01), Lehner
patent: 4559118 (1985-12-01), Heil
patent: 4560456 (1985-12-01), Heil
H. Fikentscher, Cellulose-Chemie, 30 (1931) S.58 ss siche: Cellulose-Chemie, 13 (1932).

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