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US 6,146,244 AGranted
Substrate produced by using alumina particles as an abrasive
AssigneeKao Corporation
InventorsTakeshi Atsugi, Manabu Shibata, Tsutomu Koseki, deceased
Life of this patent
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Abstract
An abrasives composition comprises (i) one or more abrasives, (ii) one or more abrasion accelerators and (iii) water. The abrasive comprises intermediate alumina particles having a mean particle size of primary particles of 40 nm or less. The composition is used to produce a substrate by abrasion.
Claims2
A substrate produced by a process comprising:
- abrading a surface of said substrate with an abrasive composition, wherein said abrasive composition comprises
- (i) one or more abrasives,
- (ii) one or more abrasion accelerators, and
- (iii) water, and
- said abrasives consist essentially of intermediate alumina particles having a mean particle size of primary particles of 40 nm or less and comprise an abrasive effective amount of at least one member selected from the group consisting of .gamma.-alumina and .theta.-alumina.
2 more elements
A substrate produced by a process comprising:
- abrading a surface of a substrate comprising amorphous carbon with an abrasive composition, wherein said abrasive composition comprises
- (i) one or more abrasives,
- (ii) one or more abrasion accelerators, and
- (iii) water, and
- said abrasives consist essentially of intermediate alumina particles having a mean particle size of primary particles of 40 nm or less and comprise an abrasive effective amount of at least one member selected from the group consisting of .gamma.-alumina and .theta.-alumina.
2 more elements
Dependencies are inferred from the claim text.