Showa Denko K.k.

Resonac Corporation

Nagoya University

Naoya Fukumoto

Katsumi Murofushi

Daisuke Yagyu

Hiroyuki Tomita

Yuta Yamaguchi

Tsuyoshi Kato

Naoko Ito

Ryuuta Miyasaka

Masaki Nanko

Shoko Uetake

Natsumi Shibata

Ichiro Ota

Masumi Kuritani

Michio Seri

Hiroshi Uchida

Masato Kitamura

Yoshitaka Ishibashi

Ayano Asano

Hiroko Hattori

Shunya Suzuki

Ryuta Miyasaka

Yoshishige Okuno

Takuya Minami

Takamitsu Kobayashi

Yutaka Tanji

Shohei Nishizawa

Chizuru Kasahara

Takuma Kuroda

The present invention provides a fluorine-containing ether compound represented by the following formula.R—CH—R—CH—R—CH—R—CH—R—CH—R—CH—R(In Formula (1), R, R, and Rare perfluoropolyether chains, Ris Formula (2), Ris Formula (3), and Rand Rare each independently a terminal group having two or three polar groups, in which individual polar groups are bound to different carbon atoms and the carbon atoms to which the polar groups are bound are bound to each other via a linking group containing a carbon atom to which no polar group is bound).

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

What is provided is a fluorine-containing ether compound represented by the following formula.R—CH—R—CH—OCHCH(OH)CHO—CH—R—CH—R(In the formula, Rand Rare perfluoropolyether chains, and Rand Rare terminal groups having two or three polar groups, in which individual polar groups are bound to different carbon atoms and the carbon atoms to which the polar groups are bound are bound to each other via a linking group having a carbon atom to which the polar groups are not bound).

A fluorine-containing ether compound represented by the following formula (1) is provided.R—CH—R—CHOCHCH(OH)—(CH)—CH(OH)CHOCH—R—CH—R  (1)(in the formula (1), n is an integer of 2 to 6, Ris a perfluoropolyether chain, Ris —OCHCH(OH)CHO(CH)OH (m in the formula is an integer of 2 to 4)).

A fluorine-containing ether compound represented by a formula (1) shown below.R—(O(CH))-[A]-[B]—O—CH—R—CH—R  (1)(In the formula (1), Ris an alkyl group which may have a substituent, or an organic group having at least one double bond or triple bond. Further, a represents an integer of 2 to 4, and b is 0 or 1. [A] is represented by a formula (2): —(OCHCH(OH)CH)— (wherein c is 1 or 2). [B] is represented by a formula (3): —(O(CH)CH(OH)CH)— (wherein d is 0 or 1, and e represents an integer of 2 to 4). However, the sum of c in the formula (2) and d in the formula (3) is 2. Ris a perfluoropolyether chain. Ris represented by a formula (4): —(OCHCH(OH)CH)—O—CH(CH)OH (wherein f represents an integer of 2 to 5).

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).

A fluorine-containing ether compound represented by the following formula (1) is provided. R—CH—R—CH—R(1) (In the formula (1), Ris an alkoxy group having 1 to 10 carbon atoms, Ris a perfluoropolyether chain, Ris —OCHCH(OH)CHO(CH)OH (in in the formula is an integer of 2 to 4).)

A fluorine-containing ether compound represented by the following formula (1).CH—[O—R—O—CH—R—CH—R]  (1)(in the formula (1), n is an integer of 2 or 3, Ris any one of —CHCH—, —CHCHCH— and —CHCH(OH)CH—, Ris a perfluoropolyether chain, Ris —OCHCH(OH)CHO(CH)OH (m in the formula is an integer of 2 to 4)).

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

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.)

There is provided a fluorine-containing ether compound represented by the following formula. R&#x2014;R&#x2014;CH&#x2014;R&#x2014;CH&#x2014;OCHCH(OH)CHO&#x2014;CH&#x2014;R&#x2014;CH&#x2014;R&#x2014;R(in the formula. Rrepresents a perfluoropolyether chain; Rand Rrepresent a divalent linking group having a polar group; Rand Rrepresent a terminal group bonded to an oxygen atom of Ror R; and at least one of Rand Ris any one selected from the group consisting of an alkenyl group having 2 to 8 carbon atoms, an alkynyl group having 3 to 8 carbon atoms, an aromatic hydrocarbon-containing group, and an aromatic heterocycle-containing group).

The fluorine-containing ether compound is represented by the following formula (1): R&#x2014;R&#x2014;CH&#x2014;R&#x2014;CH&#x2014;R. In the formula (1), Ris represented by the following formula (2), Ris represented by the following formula (3), Ris a perfluoropolyether chain, and Ris an organic end group different from R&#x2014;R&#x2014; and contains 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 one another via a linking group containing a carbon atom to which the polar group is not bonded. In the formula (2), Ris an alkoxy group selected from the group consisting of a methoxy, an ethoxy and a propoxy group. In the formula (3), w is 2 or 3.

The fluorine-containing ether compound is represented by the following formula (1): R&#x2014;R&#x2014;CH&#x2014;R&#x2014;CH&#x2014;R. In the formula (1), Ris represented by the following formula (2), Ris represented by the following formula (3), Ris a perfluoropolyether chain, and Ris an organic end group different from R&#x2014;R&#x2014; and contains 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 one another via a linking group containing a carbon atom to which the polar group is not bonded. In the formula (2), r is 1 to 3. In the formula (3), w is 2 or 3. 

A fluorine-containing ether compound of the present invention is represented by the following General Formula (1). (In the General Formula (1), X is a trivalent atom or a trivalent atom group, A is a linking group including at least one polar group, B is a linking group having a perfluoropolyether chain, and D is a polar group or a substituent having a polar group at the end.)[Chem. 1]XA-B-D)&#x2003;&#x2003;(1)

Magnetic recording medium, fluorine-containing ether compound and lubricant for 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 according to the present invention is a fluorine-containing ether compound represented by the following General Formula (1). 

A lubricant for a magnetic recording medium capable of forming a lubricant layer having excellent adhesion to a protective layer is provided. A lubricant for a magnetic recording medium contains a fluorine-containing ether compound in which a group having an ethylenic carbon-carbon double bond is disposed at one or both terminals of a perfluoroalkyl polyether chain. It is preferable that the group having the ethylenic carbon-carbon double bond is disposed at one terminal of the perfluoroalkyl polyether chain, and a hydroxyl group is disposed at other terminal. It is preferable that the lubricant for a magnetic recording medium contains a compound in which one or more functional groups selected from a hydroxyl group, an amino group, an amido group and a carboxyl group is disposed at one or both terminals of a perfluoroalkyl polyether chain.

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Ichihara, Japan

Naoya Fukumoto