Showa Denko K.k.

Shohei Nishizawa

Hiroyuki Tomita

Tsuyoshi Kato

Katsumi Murofushi

Naoya Fukumoto

Daisuke Yagyu

Yoshishige Okuno

Yuta Yamaguchi

Masaki Nanko

Hiroki Kuramoto

Kenichi Nakanishi

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.

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

A polyisocyanurate raw material composition containing a polyfunctional isocyanate, a compound (I) represented by general formula (I) shown below, and an epoxy compound. In general formula (I), each of Rto Rrepresents a hydrogen atom, an alkoxy group of 1 to 10 carbon atoms, an alkyl group of 2 to 10 carbon atoms (or an alkyl group of 1 to 10 carbon atoms in the case of Rto R), an aryl group of 6 to 12 carbon atoms, an amino group, a monoalkylamino group of 1 to 10 carbon atoms, a dialkylamino group of 2 to 20 carbon atoms, a carboxy group, a cyano group, a fluoroalkyl group of 1 to 10 carbon atoms, or a halogen atom (provide that Rand Rare not both hydrogen atoms). 

Raw material composition for polyisocyanurate and method for producing polyisocyanurate

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Ichihara, Japan

Shohei Nishizawa