Erodable agglomerates and abrasive products containing the same
AssigneeMinnesota Mining and Manufacturing Company
InventorsUlrich Bloecher, Ernest J. Duwell
Life of this patent
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Abstract
Erodable agglomerates containing individual abrasive grains, a binder and matrix material selected from the group consisting of pulp suitable for making paper and derivatives thereof, wood flour, and vermiculate. The agglomerates are useful for coated abrasives and bonded abrasives. Abrasive products containing the agglomerates provide higher stock removal than abrasive products bearing a single layer of abrasive grains, since the erodable character of the agglomerates allows the sloughing off of spent individual abrasive grains during abrading operations and the exposing of new abrasive grains to the workpiece. The invention also provides a method of preparing the agglomerates of this invention.
Claims19
An abrasive article comprising erodable agglomerates, comprising a multiplicity of individual grains of abrasive mineral, matrix material selected from pulp suitable for use in making paper and derivatives thereof, wood flour, vermiculite, and mixtures thereof, and a binder.
Erodable agglomerate suitable for an abrasive product comprising a multiplicity of individual grains of abrasive mineral, matrix material selected from the group consisting of pulp suitable for use in making paper and derivatives thereof, wood flour, vermiculite, and mixtures thereof, and a binder.
Method of preparing an erodable agglomerate suitable for an abrasive product wherein said agglomerate comprises a multiplicity of individual grains of abrasive mineral, matrix material selected from the group consisting of pulp suitable for making paper and derivatives threof, wood flour, vermiculite, and mixtures thereof, and a binder, said method comprising the steps of:
- (a) dispersing said matrix material in a liquid medium;
- (b) combining the dispersion resulting from step (a) with abrasive mineral and binder to form a mixture,
- (c) curing the mixture from step (b),
- (d) treating the cured mixture from step (c) to form agglomerates.
Dependencies are inferred from the claim text.