Showa Denko K.k.

Resonac Corporation

The University of Tokyo

Daisuke Yagyu

Naoya Fukumoto

Katsumi Murofushi

Tsuyoshi Kato

Yuta Yamaguchi

Hiroyuki Tomita

Masaki Nanko

Shoko Uetake

Natsumi Shibata

Ryuuta Miyasaka

Ayano Asano

Ryota Niibayashi

Naoko Ito

Masumi Kuritani

Yuko Nakagami

Eiko Kato

Shunya Suzuki

Ryuta Miyasaka

Yoshikuni Okumura

Ichiro Ota

Shohei Nishizawa

Toru Tachibana

Yutaka Tanji

A fluorine-containing ether compound represented by the following formula. R—CH—R[—CH—R—CH—R]—CH—R(x is 1 or 2, Ris a perfluoropolyether chain, Ris represented by Formula (2), and Rand Rare each a terminal group having 1 to 50 carbon atoms, which has 1 to 4 polar groups, and in Formula (2), a1 and a2 are each 0 to 5, b is 0 or 1, and Y is an acyclic divalent saturated hydrocarbon group having 2 to 8 carbon atoms)

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

This fluorine-containing ether compound is represented by formula (1) shown below.R—CH—R—CH—R  (1)

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. 

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 Formula (1) is provided.R&#x2014;R&#x2014;CH&#x2014;R&#x2014;CH&#x2014;R&#x2014;R&#x2003;&#x2003;(1)(In Formula (1), Rand Reach represents a group having a heterocyclic ring and may be the same as or different from each other, Rand Reach represents a divalent linking group having a polar group and play be the same as or different from each other, and Rrepresents a perfluoropolyether chain.)

The present invention relates to a fluorine-containing ether compound represented by Formula (1),R&#x2014;R&#x2014;CH&#x2014;R&#x2014;CH&#x2014;R&#x2003;&#x2003;(1).(In Formula (1), Ris an end group including an organic group having at least one double bond or triple bond, Ris a divalent linking group bonded to Rby etheric oxygen, Ris a perfluoropolyether chain, Ris an end group having two or three polar groups with each polar group being bonded to different carbon atoms, and the carbon atoms, to which the polar groups are bonded, being bonded to each other via a linking group including carbon atoms to which the polar groups are not bonded.)

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) 

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Ichihara, Japan

Daisuke Yagyu