Patent US3444102A successfully refreshed from Google Patents.
Patent US4652275A successfully refreshed from Google Patents.
US4652275A
Expired / Lapsed
US
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Erodable agglomerates and abrasive products containing the same
Assignee: 3M Co
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Filing: 1985-08-07
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Granted: 1987-03-24
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Expires: 2005-08-07
Abstract
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.
Inventors
- 👤 Ulrich Bloecher
- 👤 Ernest J. Duwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:27
CPC Classifications
B; B24; B24D; B24D3/00; B24D3/34; B24D3/02; B24D3/20; B24D3/28; B24D3/32; C; C09; C09K; C09K3/00; C09K3/14; C09K3/1436
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
38 words
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.
Claim 2
Dependent Claim
38 words
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.
Claim 3
Dependent Claim
40 words
The article of claim 1 wherein the agglomerate contains from about 60 to about 95 weight percent individual abrasive grains, from about 0.3 to about 8 weight percent matrix material, and from about 5 to about 30 weight percent binder.
Claim 4
Dependent Claim
27 words
The article of claim 1 wherein the binder is selected from the group consisting of phenolic resins, urea-formaldehyde resins, phenol formaldehyde resins, epoxy resins, and alkyd resins.
Claim 5
Dependent Claim
43 words
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.
Claim 6
Dependent Claim
43 words
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.
Claim 7
Dependent Claim
41 words
The agglomerate of claim 4 wherein the agglomerate contains from about 60 to about 95 weight percent individual abrasive grains, from about 0.3 to about 8 weight percent erodable matrix material, and from about 5 to about 30 weight percent binder.
Claim 8
Dependent Claim
27 words
The agglomerate of claim 4 wherein the binder is selected from the group consisting of phenolic resins, urea-formaldehyde resins, phenol formaldehyde resins, epoxy resins, and alkyd resins.
Claim 9
Dependent Claim
14 words
A coated abrasive article comprising the agglomerates of claim 4 secured to a backing.
Claim 10
Dependent Claim
20 words
The coated abrasive article of claim 7 wherein the agglomerates are secured to said backing by make and size coats.
Claim 11
Dependent Claim
10 words
A bonded abrasive article comprising the agglomerates of claim 4.
Claim 12
Dependent Claim
98 words
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.
Claim 13
Dependent Claim
98 words
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.
Claim 14
Dependent Claim
28 words
The method of claim 10 wherein the dispersion of step (a) comprises sufficient liquid to allow abrasive mineral to be distributed uniformly among the mass of matrix material.
Claim 15
Dependent Claim
48 words
The method of claim 10 wherein the mixture of step (b) comprises from about 55 to about 94 percent by weight abrasive mineral, from about 5 to about 35 percent by weight binder, from about 1 to about 40 percent by weight dispersion of liquid and matrix material.
Claim 16
Dependent Claim
15 words
The method of claim 10 wherein the mixture of step (c) is cured by heat.
Claim 17
Dependent Claim
20 words
The method of claim 10 wherein the cured mixture is treated by crushing to form agglomerates of the desired size.
Claim 18
Dependent Claim
28 words
The abrasive article of claim 1 wherein the matrix material is selected from pulp suitable for use in making paper and derivatives thereof, wood flour, and mixtures thereof.
Claim 19
Dependent Claim
27 words
The agglomerate of claim 4 wherein the matrix material is selected from pulp suitable for use in making paper and derivatives thereof, wood flour, and mixtures thereof.
Claim 20
Dependent Claim
14 words
A coated abrasive article comprising the agglomerates of claim 16 secured to a backing.
Claim 21
Dependent Claim
20 words
The coated abrasive article of claim 17 wherein the agglomerates are secured to a backing by make and size coats.
Claim 22
Dependent Claim
10 words
A bonded abrasive article comprising the agglomerates of claim 16.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-23 | 1990-09-22 | 1991-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-23 | 1994-09-22 | 1995-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-23 | 1998-09-22 | 1999-03-24 | $7700.00 | Window Closed / Lapsed |