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US 5,626,640 AGranted
Composition adapted for use in texturing process for magnetic disc
AssigneeShowa Denko K.K.
InventorKen Ishitobi
Life of this patent
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Abstract
A composition capable of forming uniform textured streaks and eliminating or reducing the occurrence of protrusions to as few as possible on the ground layer (the ground layer of a magnetic layer) of a magnetic disc. The composition comprises minute grains or powder of diamond etc., an alkylene gycol monoalkyl ether and a fatty acid or a metallic salt thereof.
Claims12
A composition adapted for use in a texturing process of a magnetic disc, comprising:
- (A) minute grains or powder of at least one material selected from the group consisting of diamond, CBN, alumina and silicon carbide;
- (B) an alkylene glycol monoalkyl ether having the general formula:
- R.sub.1 O[(CH.sub.2).sub.n O].sub.m H
- wherein R.sub.1 represents a straight or branched chain of an alkyl group having 1 to 4 carbon atoms, m is an integer of 1 to 3, and n is an integer of 2 or 3;
- and
- (C) at least one compound selected from the group of a fatty acids having 10 to 22 carbon atoms or a metallic salt thereof.
3 more elements
Dependencies are inferred from the claim text.