EP0395087A2
Expired / Lapsed
EP
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Bonded abrasive products
Assignee: Saint Gobain Abrasives Inc
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Filing: 1990-04-27
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Granted: —
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Expires: 2010-04-27
Abstract
Abstract Resinoid and vitrified bonded abrasive products containing filament shaped sintered alumina based abrasive made up predominantly of fine alpha alumina crystals.
Inventors
- 👤 Paul W. Kalinowski
- 👤 Kuni S. Ramakrishnan
- 👤 Charles V. Rue
- 👤 David A. Sheldon
- 👤 Brian Swanson
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 00:24
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/14; B; B24; B24D; B24D3/00; B24D3/02; B24D3/04; B24D3/06; B24D3/20; B24D3/28; B24D3/34; C04; C04B; C04B35/00; C04B35/01; C04B35/10
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
63 words
A bonded abrasive product comprised of a sintered sol gel alumina based filament shaped abrasive and a bond therefor wherein said filament shaped abrasive has a substantially uniform cross-section an average aspect ratio of greater than about 1.0, a hardness of at least 16 GPa, and is comprised predominantly of sintered alpha alumina crystals having a size of less than about 2 µm.
Claim 2
Dependent Claim
63 words
A bonded abrasive product comprised of a sintered sol gel alumina based filament shaped abrasive and a bond therefor wherein said filament shaped abrasive has a substantially uniform cross-section an average aspect ratio of greater than about 1.0, a hardness of at least 16 GPa, and is comprised predominantly of sintered alpha alumina crystals having a size of less than about 2 µm.
Claim 3
Dependent Claim
19 words
The bonded abrasive product of claim 1 wherein said sintered abrasive is a seeded sol gel filament shaped abrasive.
Claim 4
Dependent Claim
27 words
The bonded abrasive product of claim 1 or 2 wherein said sintered filament shaped alumina based abrasive has a density of at least 95% of theoretical density.
Claim 5
Dependent Claim
50 words
The bonded abrasive product of one of the preceding claims wherein said sintered filament shaped alumina based abrasive includes from 1% to 50% by weight of a material selected from the group consisting of zirconia, titania, magnesia, ceria, spinel, hafnia, mullite, manganese dioxide, precursors of these oxides and mixtures thereof.
Claim 6
Dependent Claim
57 words
The bonded abrasive product of one of the preceding claims wherein said sintered filament shaped alumina based abrasive has an aspect ratio of from 1.5 to 25 and/or a diameter of from 0.001 mm to 2 mm, and/or said alpha alumina crystals have a size of less than about 1 µm preferably less than about 0.4 µm.
Claim 7
Dependent Claim
42 words
The bonded abrasive product according to one of the preceding claims wherein the particle has a hardness of at least 18 GPa, and is comprised at least 95% by weight of alpha alumina crystallites having a size of 1 µm or less.
Claim 8
Dependent Claim
24 words
The bonded abrasive product according to one of the preceding claims in which the filament shaped abrasive particles are essentially free from glassy components.
Claim 9
Dependent Claim
28 words
The bonded abrasive product of one of the preceding claims wherein the said filament shaped alumina based abrasive particles have a breaking strength of at least 8,000 kg/cm².
Claim 10
Dependent Claim
25 words
The bonded abrasive product of one of the preceding claims wherein said filament shaped alumina based abrasive is curved and/or twisted in its longer dimension.
Claim 11
Dependent Claim
47 words
The bonded abrasive product of one of the preceding claims wherein said bonded abrasive product consists of 3% to 39% by volume of bond, 30% to 56% by volume of abrasive, and 5% to 67% by volume of pores, and wherein said bond is a vitrified bond.
Claim 12
Dependent Claim
48 words
The bonded abrasive product of one of claim 1 to 9 wherein said bonded abrasive product consists of 5% to 76% by volume of bond, 24% to 62% by volume of abrasive, and 0% to 71% by volume of pores, and wherein said bond is a resinoid bond.
Claim 13
Dependent Claim
31 words
The bonded abrasive product of Claim 11 wherein said resinoid bond is one selected from the group consisting of phenol-formaldehyde, epoxy, polyurethane, polyester, shellac, rubber, polyimide, polybenzimidizole, phenoxy, and mixtures thereof.
Claim 14
Dependent Claim
67 words
The bonded abrasive product of one of the preceding claims wherein said abrasive product includes, in addition to said sintered filament shaped alumina based abrasive, 1% to 90% by volume of a second abrasive selected from the group consisting of fused alumina, cofused alumina-zirconia, non-fiber shaped sintered alumina, non-fiber shaped sintered alumina-zirconia, silicon carbide, cubic boron nitride, diamond, flint, garnet, bubble alumina, bubble alumina-zirconia, and mixtures thereof.
Claim 15
Dependent Claim
17 words
The bonded abrasive product of one of the preceding claims wherein said product is a grinding wheel.
References Cited (Backward Citations)
No citation records indexed.
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