Patent EP0464850A2 successfully refreshed from Google Patents.
EP0464850A2
Expired / Lapsed
EP
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Coated abrasives and their use
Assignee: Saint Gobain Abrasives Inc
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Filing: 1991-07-05
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Granted: —
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Expires: 2011-07-05
Abstract
Abstract A coated abrasive product comprising fine grit particles of a seeded sol gel, has especially good grinding performance, especially when treated with a layer comprising a grinding adjuvant.
Inventors
- 👤 Willeam F. Mccutcheon
- 👤 Robert G. Kelly
- 👤 Richard W. Kalita
- 👤 Walter T. Putaski
- 👤 Judith S. Allison
- 👤 Bernard T. Loughlin
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 07:01
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/14; C09K3/1436
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
39 words
A coated abrasive product comprising a flexible substrate or backing material and, adhered thereto by means of a maker coat, and optionally a size coat, a seeded sol-gel alpha alumina abrasive with a grit size of 180 or finer.
Claim 2
Dependent Claim
22 words
A coated abrasive product according to claim 1 in which the sol-gel abrasive particles have a grit size of 240 or finer.
Claim 3
Dependent Claim
29 words
A coated abrasive product according to claim 1 or 2, in which the seeded sol-gel alumina abrasive grains comprise crystals with a crystal size of one µm or less.
Claim 4
Dependent Claim
32 words
A coated abrasive product according to claim 3, in which the alpha alumina has a hardness of at least 18 Gpa and a density of at least 95% of the theoretical density.
Claim 5
Dependent Claim
53 words
A coated abrasive product especially according to one of the preceding claims, comprising a flexible substrate or backing, with a seeded sol gel alpha alumina in the form of abrasive particles adhered to the substrate or backing by a maker coat, a size coat and a further separate coat comprising a grinding adjuvant.
Claim 6
Dependent Claim
21 words
A coated abrasive product according to claim 5 wherein the abrasive particles have a particle size of less than 180 grit.
Claim 7
Dependent Claim
21 words
A coated abrasive product according to claim 5 or 6, wherein the further separate coat is applied over the size coat.
Claim 8
Dependent Claim
24 words
A coated abrasive product according to one of the preceding claims in which the abrasive particles have a grit size of 240 or finer.
Claim 9
Dependent Claim
21 words
A coated abrasive product according to one of the preceding claims, in which the size coat also contains a grinding adjuvant.
Claim 10
Dependent Claim
32 words
A coated abrasive product according to one of claims 5 to 9, in which the separate coat comprising a grinding adjuvant comprises from about 55 to about 85 wt.% of the adjuvant.
Claim 11
Dependent Claim
20 words
A coated abrasive product according to one of cclaims 5 to 10, in which the grinding adjuvant is potassium fluorobrate.
Claim 12
Dependent Claim
33 words
A coated abrasive product according to one of the preceding claims, in which the seeded sol-gel alumina abrasive grains comprises crystals of alpha alumina with a crystalline size of one µm or less.
Claim 13
Dependent Claim
38 words
A coated abrasive product according to one of claims 5 to 12, in which the alpha alumina has a hardness of at least 18 Gpa and a density that is at least 95% of the theoretical density figure.
Claim 14
Dependent Claim
23 words
A coated abrasive product according to one of the preceding claims, in which each of the various coats further comprises a phenolic resin.
Claim 15
Dependent Claim
28 words
A coated abrasive product according to one of the preceding claims in which the seeded sol-gel alumina abrasive grains have a crystal size of one µm or less.
Claim 16
Dependent Claim
26 words
A coated abrasive product according to one of the preceding claims in which the abrasive forms from about a 50 to about an 85% closed coating.
Claim 17
Independent Claim
20 words
A method of abrading a metal workpiece which comprises using an abrasive product according to one of the preceding claims.
References Cited (Backward Citations)
No citation records indexed.
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