FLUORINE-CONTAINING ALKYLCARBOXYLIC ACID AND MAGNETIC RECORDING MEDIUM HAVING LUBRICANT LAYER CONTAINING THE FLUORINE-CONTAINING ALKYLCARBOXYLIC ACID

• Main Authors: KUWABARA KENJI, OCHI YUKIKAZU, MURAI MIKIO
• Format: Patent
• Language: English
• Published: 23.03.1999
• Edition: 6
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMISTRY; FUELS; INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATINGCOMPOSITIONS; INFORMATION STORAGE; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER; LUBRICANTS; LUBRICATING COMPOSITIONS; METALLURGY; ORGANIC CHEMISTRY; PEAT; PETROLEUM, GAS OR COKE INDUSTRIES; PHYSICS; TECHNICAL GASES CONTAINING CARBON MONOXIDE; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATINGINGREDIENTS IN A LUBRICATING COMPOSITION

PROBLEM TO BE SOLVED: To obtain the subject new compound useful for lubricants used for precision machines and precision parts requiring highly precise lubricity, and further useful for mold release agents, rust-preventing agents and the like. SOLUTION: A compound of formula I [R1 is an aliphatic alkyl, an alkenyl; R2 is a fluoroalkyl, a perfluoropolyether; R3 is O, S: (a) is 0-20: (b) is 0,1], e.g. a compound of formula II. The compound of formula I is obtained by reacting an α-mercapto carboxylic acid alkyl ester with a fluorine-containing halide in a solvent (e.g. methylethylketone, methylisobutylketone) preferably at 70-90 deg.C, and subsequently hydrolyzing the synthesized fluorine-containing alkyl carboxylic acid ester in the presence of a basic catalyst. The perfluoropolyether group of the compound of formula I has a structure of formula III [(k) is >=1], formula IV [(q), (p) are each 1) or formula V [R4 is a fluoroalkyl; (m) is 1-6; (n) is 1-30].