US 5,399,758 AGranted

Diacylhydrazine photo-reactive compounds

AssigneeHitachi, Ltd.

InventorsToshimasa Miura, Ryoichi Sudo, Saori Matsuda, Fumio Kataoka

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Abstract

Disclosed are a novel azide compound represented, for example, by the formula, ##STR1## wherein R.sub.f represents a fluoroalkyl or fluoroalkylpolyether group, ##STR2## wherein R represents a divalent organic group having an ester bond, and R.sub.f ' represents a fluoroalkylpolyether group, and a novel diacylhydrazine compound having a fluoroalkylpolyether group in the side chain and lubricants containing them. When this lubricant is coated onto the carbonaceous protective film of magnetic recording media and reacted by the action of light or heat, it strongly bonds or adheres to the protective film. Thus, the durability of the lubricant improves, as a result of which a high-density magnetic recording medium having a high reliability and long life can be obtained.

Claims7

Dependent claims

A diacylhydrazine having at least one fluoroalkylpolyether group as a side chain, selected from the group consisting of:

I:
a diacylhydrazine having an average molecular weight of 500 to 20,000 and represented by the formula 27 ##STR47## II:
a diacylhydrazine having an average molecular weight of 500 to 20,000 and represented by the formula 28 ##STR48## III:
a diacylhydrazine having an average molecular weight of 500 to 20,000 and represented by the formula 29 ##STR49## wherein R represents one member selected from the group consisting of a hydrogen atom, an alkyl group and an aromatic group;
IV:
a diacylhydrazine having an average molecular weight of 500 to 20,000 and represented by the formula 30 ##STR50## wherein R represents one member selected from the group consisting of a hydrogen atom, an alkyl group and an aromatic group;
V:
a diacylhydrazine having an average molecular weight of 500 to 20,000 and represented by the formula 31 ##STR51## VI:
a diacylhydrazine having a molecular weight of 500 to 200,000 and represented by the formula 32 ##STR52##

6 more elements

Dependencies are inferred from the claim text.