The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 23, 2021
Filed:
Aug. 28, 2018
Showa Denko K.k., Tokyo, JP;
Tsuyoshi Kato, Ichihara, JP;
Daisuke Yagyu, Ichihara, JP;
Naoya Fukumoto, Ichihara, JP;
Yuta Yamaguchi, Kawasaki, JP;
Masumi Kuritani, Tokyo, JP;
Katsumi Murofushi, Ichihara, JP;
Masaki Nanko, Ichihara, JP;
Hiroyuki Tomita, Ichihara, JP;
SHOWA DENKO K. K., Tokyo, JP;
Abstract
Provided is a fluorine-containing ether compound capable of forming a lubricant layer having excellent wear resistance even when the thickness is thin, and suitable as a material of a lubricant for a magnetic recording medium. The fluorine-containing ether compound is a compound represented by the following formula (1): R—R—CH—R—CH—R—R; wherein Ris a perfluoropolyether chain; Ris a terminal group bonded to R; Ris a terminal group bonded to R; Ris an alkenyl group or an alkynyl group; Ris a group containing a heterocyclic ring; Ris represented by the following formula (2); Ris represented by the following formula (3); and a in the formula (2) and b in the formula (3) are each independently an integer of 1 to 3.