Polishing composition

Details Polishing composition Polishing composition

1989-01-18

1990-09-11

Dixon, Jr., William R.

Compositions: coating or plastic

Coating or plastic compositions

Polishes

252 791, 51308, 51309, C09G 102

Patent

active

049560158

ABSTRACT:
The present invention relates to a polishing composition comprising water, .alpha.-alumina and boehmite. The addition of boehmite contributes to an improvement of the polishing performance to provide an excellent polished surface and a high polishing rate. The polishing performance can further be improved by incorporating at least one member selected from the group consisting of a water-soluble metal salt, an ammonium salt and a metal nitrite. The polishing composition of the present invention is suitable for polishing metals, plastics or glass. It is particularly useful for polishing a surface of a memory hard disk plated with nickel or a nickel alloy.

REFERENCES:
patent: 4225349 (1980-09-01), Koshiyama et al.
patent: 4696697 (1987-09-01), Kitano et al.
patent: 4705566 (1987-11-01), Senda et al.
patent: 4769046 (1988-09-01), Senda et al.
Kirk-Othmer Encyclopedia of Chemical Technology, 3rd Ed, vol. 2, pp. 218-245, 1978.

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