Resonac Corporation

Showa Denko K.k.

Masaki Nanko

Naoya Fukumoto

Daisuke Yagyu

Katsumi Murofushi

Tsuyoshi Kato

Hiroyuki Tomita

Yuta Yamaguchi

Masumi Kuritani

Natsumi Shibata

Shohei Nishizawa

Shunya Suzuki

The present invention provides a fluorine-containing ether compound that can form a lubricating layer which has excellent wear resistance even if the thickness is thin and in which a decrease in film thickness due to spin-off is less likely to occur. The fluorine-containing ether compound is represented by the following formula. R—R—O—CH—R—CH—O—R—R(Ris a perfluoropolyether chain. Rand Rare either an alkyl group which may have a substituent or a hydrocarbon group having a double bond or triple bond. Rand Rare each a divalent linking group containing one or more heteroatoms, and have one or more polar groups, and the terminal end on the side bonded to Rand Ris a heteroatom. At least one of Rand Rcontains one or more secondary amine structures. At least one of R—R— and —R—Rcontains one or more cyano groups).

Fluorine-containing ether compound, lubricant for magnetic recording medium, and magnetic recording medium

There is provided a fluorine-containing ether compound represented by the following formula. R—R—CH—R—CH—OCHCH(OH)CHO—CH—R—CH—R—R(in the formula, Rrepresents a perfluoropolyether chain; Rand Rrepresent a divalent linking group having a polar group and may be the same or different from each other; Rand Rrepresent a terminal group bonded to an oxygen atom of Ror Rand may be the same or different from each other; and at least one of Rand Ris an organic group having 1 to 8 carbon atoms and at least one of hydrogens included in the organic group is substituted by a cyano group).

The present invention provides a fluorine-containing ether compound represented by the following formula:R—R—CH—R—CH—R—R(in the formula, Rrepresents a perfluoropolyether chain; Rand Reach independently represent any of an alkyl group which may have a substituent, an organic group having a double bond or a triple bond, and a hydrogen atom; —R—CH—Ris represented by -[A]-[B]—O—CH—R; R—CH—R— is represented by R—CH—O—[C]-[D]-; [A] is represented by Formula (4), [B] is represented by Formula (5), [C] is represented by Formula (6), and [D] is represented by Formula (7)):

This fluorine-containing ether compound is a fluorine-containing ether compound represented by formula (1).R&#x2014;X&#x2014;R&#x2014;CH&#x2014;R&#x2014;CH&#x2014;R&#x2003;&#x2003;(1)(In formula (1), Ris an alkenyloxy group of 2 to 8 carbon atoms or an alkynyloxy group of 3 to 8 carbon atoms. Ris represented by formula (2) shown below. In formula (2), a represents an integer of 1 to 3. X is represented by formula (3) shown below. In formula (3), b represents an integer of 1 to 5, Y is a divalent linking group that is bonded to a carbon atom in formula (2), and R represents an alkyl group of 1 to 6 carbon atoms or H. Rrepresents a perfluoropolyether chain. Rrepresents a terminal group containing two or three polar groups, wherein each polar group is bonded to a different carbon atom, and the carbon atoms to which the polar groups are bonded are bonded to each other via a linking group containing a carbon atom to which a polar group is not bonded.)

Fluorine-containing ether compound, lubricant for magnetic recording medium and magnetic recording medium

Provided is a fluorine-containing ether compound that can be suitably used as a material for a lubricant for a magnetic recording medium, capable of forming a lubricant layer having excellent chemical substance resistance and wear resistance even when the thickness is small. A fluorine-containing ether compound represented by the following formula (1):R&#x2014;R&#x2014;CH&#x2014;R&#x2014;CH&#x2014;R&#x2014;R&#x2003;&#x2003;(1) In the formula (1), Ris a perfluoropolyether chain. Rand Rare divalent linkage groups having a polar group, and may be the same or different. Rand Rare terminal groups bonded to Ror R, which may be the same or different, and at least one of Rand Ris an organic group having 1 to 8 carbon atoms wherein one or more hydrogen atoms of the organic group is substituted with a cyano group.

A fluorine-containing ether compound represented by R&#x2014;R&#x2014;CH&#x2014;R&#x2014;CH&#x2014;R&#x2014;Ris provided. (Ris a perfluoropolyether chain; Rand Rare each independently any one of an alkyl group that may have a substituent, an organic group having at least one double bond or at least one triple bond, and a hydrogen atom; and &#x2014;R&#x2014;CH&#x2014;Ris represented by Formula (2), and R&#x2014;CH&#x2014;R&#x2014; is represented by Formula (3))-[A]-[B]&#x2014;O&#x2014;CH&#x2014;R&#x2003;&#x2003;(2)R&#x2014;CH&#x2014;O&#x2014;[C]-[D]-&#x2003;&#x2003;(3)([A] is represented by Formula (4), [B] is represented by Formula (5), [C] is represented by Formula (6), [D] is represented by Formula (7), and in the formula, a and b are integers of 0 to 2, c is an integer of 2 to 5, d and f are integers of 0 to 2, and e is an integer of 2 to 5, and at least one of b and d in the formula is 1 or more) 

Fluorine-containing ether compound, lubricant for magnetic recording media, and magnetic recording medium

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&#x2014;R&#x2014;CH&#x2014;R&#x2014;CH&#x2014;R&#x2014;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. 

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Ichihara, Japan

Masaki Nanko