Magnetic recording media comprising specific types of silicone lubricants in the magnetic layer thereof
Abstract
Abstract Magnetic recording media having specific types of lubricants contained in the magnetic layer, the lubricants comprising at least one compound selected from the group consisting of silicone compounds of the formulas (I) and (II) ##STR1## in which R 1 represents a saturated or unsaturated monovalent hydrocarbon group having from 7 to 21 carbon atoms, R 2 represents a saturated monovalent hydrocarbon group having from 1 to 4 carbon atoms, k is an integer of from 1 to 12, l is an integer of from 2 to 6, m is an integer of 1 or 2, and n is an integer of 1 or 2 provided that m+n≦3, and {(CH.sub.3).sub.k' [F(CF.sub.2).sub.j' CH.sub.2 CH.sub.2 ].sub.l' (R'.sub.1 COO).sub.m' (R'.sub.2 O).sub.n' SiO.sub.(4-k'-l'-m'-n')/2 } o' (II) in which R' 1 represents a saturated or unsaturated monovalent hydrocarbon group having from 7 to 21 carbon atoms, R' 2 represents a saturated monovalent hydrocarbon group having from 1 to 4 carbon atoms, j' is an integer of from 1 to 12, O≦k'<2, O<m'<2.5, O<l'≦1, O<n'≦2, 2≦k'+l'+m'+n'≦3, and o' is an integer of from 2 to 300 and satisfies the requirement that when multiplied by o', the values k', l', m' and n', respectively, give an integer.
Inventors
- 👤 Osamu Kobayashi
Bibliographic Details
Claims Analysis
Total Claims: 7References Cited (Backward Citations)
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