Abstract

Disclosed is a lubricating agent for recording media which is hardly decomposed, and firmly adheres to a recording medium by an UV treatment. Also disclosed is a magnetic disk which is capable of withstanding continuous sliding at high speed rotation. Specifically disclosed is a lubricating agent for recording media which contains a perfluoropolyether compound represented by the following formula (1). F(CF2CF2CF2O)m-CF2CF2CH2-R1 (1) ⏧In the formula, R1 represents a group represented by: ⏧Chemical formula 1] (wherein R represents a C1-4 fluoroalkyl group); and m represents a number of 2-60.] Also specifically disclosed is a magnetic disk provided with a lubricating layer which is composed of such a lubricating agent.

IPC Classes  ?

• C10M 105/74 - Lubricating compositions characterised by the base-material being a non-macromolecular organic compound containing phosphorus
• C10M 107/48 - Lubricating compositions characterised by the base-material being a macromolecular compound containing phosphorus
• G11B 5/725 - Protective coatings, e.g. anti-static containing a lubricant
• C10N 30/00 - Specified physical or chemical property which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
• C10N 30/06 - OilinessFilm-strengthAnti-wearResistance to extreme pressure
• C10N 40/18 - Electric or magnetic purposes in connection with recordings on magnetic tape or disc
• C10N 50/02 - Form in which the lubricant is applied to the material being lubricated dissolved or suspended in a carrier which subsequently evaporates to leave a lubricant coating

Abstract

A compound represented by the formula (I): A-CH2CF2O(CF2CF2O)m-(CF2O)n-CF2CH2-B (I) (wherein A is a group represented by the following formula (a); B is a group represented by the following formula (b); R is C2-5 fluoroalkyl; m is 0 or a real number of 1-40; n is 0 or a real number of 1-40; and p is a real number of 1-3).

IPC Classes  ?

• C07F 9/6593 - 1,3,5-Triaza-2,4,6-triphosphorines
• C08G 65/34 - Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from hydroxy compounds or their metallic derivatives
• C10M 105/74 - Lubricating compositions characterised by the base-material being a non-macromolecular organic compound containing phosphorus
• C10M 107/48 - Lubricating compositions characterised by the base-material being a macromolecular compound containing phosphorus
• G11B 5/725 - Protective coatings, e.g. anti-static containing a lubricant
• C10N 30/06 - OilinessFilm-strengthAnti-wearResistance to extreme pressure
• C10N 40/18 - Electric or magnetic purposes in connection with recordings on magnetic tape or disc
• C10N 50/02 - Form in which the lubricant is applied to the material being lubricated dissolved or suspended in a carrier which subsequently evaporates to leave a lubricant coating