US4773920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated abrasive suitable for use as a lapping material
Assignee: 3M Co
•
Filing: 1987-03-18
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Granted: 1988-09-27
•
Expires: 2007-03-18
Abstract
Abstract Coated abrasive comprising a backing and abrasive grain adhered to said backing by means of a binder. The binder is prepared from a composition that is curable by free-radical polymerization. The composition contains abrasive grain suspended therein at the time the composition is coated onto the backing. The abrasive exhibits high endurance for extended periods of use. The coated abrasive is prepared by a method comprising the steps of: (a) providing a coatable composition comprising a binder curable by free-radical polymerization, said composition having lapping size abrasive grains suspended therein, (b) coating said composition on a backing, and (c) curing said composition by means of free-radical polymerization.
Inventors
- 👤 Jonathan N. Chasman
- 👤 Ramon F. Hegel
- 👤 Philip E. Kendall
- 👤 Nathan B. Postma
- 👤 Douglas S. Spencer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:57
CPC Classifications
B; B24; B24D; B24D3/00; B24D3/001; B24D11/00; B24D3/02; B24D3/20; B24D3/28; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31536
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
56 words
A coated abrasive suitable for use as a lapping material, said coated abrasive comprising (a) a backing, and (b) an abrasive coating adhered to said backing, said abrasive coating being formed by coating a suspension comprising lapping size abrasive grains and binder curable by free-radical polymerization onto said backing and curing said binder by free-radical polymerization.
Claim 2
Dependent Claim
56 words
A coated abrasive suitable for use as a lapping material, said coated abrasive comprising (a) a backing, and (b) an abrasive coating adhered to said backing, said abrasive coating being formed by coating a suspension comprising lapping size abrasive grains and binder curable by free-radical polymerization onto said backing and curing said binder by free-radical polymerization.
Claim 3
Dependent Claim
22 words
The coated abrasive of claim 1 wherein said abrasive grains have an average size of from about 0.3 to about 35 micrometers.
Claim 4
Dependent Claim
20 words
The coated abrasive of claim 2 wherein said curable binder comprises a monomer having at least two ethylenically unsaturated moieties.
Claim 5
Dependent Claim
33 words
The coated abrasive of claim 3 wherein said monomer is selected from the group consisting of urethane acrylates, urethane methacrylates, isocyanurate acrylates, isocyanurate methacrylates, polyester-urethane acrylates, polyester-urethane methacrylates, epoxy acrylates, and epoxy methacrylates.
Claim 6
Dependent Claim
64 words
A coated abrasive suitable for use as a lapping material, said coated abrasive comprising (a) a backing, and (b) an abrasive coating adhered to said backing, said abrasive coating being formed by coating a suspension comprising lapping size abrasive grains and binder curable by free-radical polymerization onto said backing and curing said binder by free-radical polymerization, wherein said curable binder includes a coupling agent.
Claim 7
Dependent Claim
64 words
A coated abrasive suitable for use as a lapping material, said coated abrasive comprising (a) a backing, and (b) an abrasive coating adhered to said backing, said abrasive coating being formed by coating a suspension comprising lapping size abrasive grains and binder curable by free-radical polymerization onto said backing and curing said binder by free-radical polymerization, wherein said curable binder includes a coupling agent.
Claim 8
Dependent Claim
14 words
The coated abrasive of claim 5 wherein said coupling agent is γ-methacryloxypropyl trimethoxy silane.
Claim 9
Dependent Claim
14 words
The coated abrasive of claim 1 wherein said curable binder includes a reactive diluent.
Claim 10
Dependent Claim
28 words
The coated abrasive of claim 7 wherein said reactive diluent is selected from the group consisting of hexane diol diacrylate, pentaerythritol triacrylate, trimethylolpropane triacrylate, β-hydroxyethylmethacrylate, and tetrahydrofuran acrylate.
Claim 11
Dependent Claim
47 words
Method of preparing a coated abrasive comprising the steps of: (a) providing a coatable composition comprising a binder curable by free-radical polymerization having lapping size abrasive grains suspended therein, (b) coating said coatable composition on a backing, and (c) curing said composition by means of free-radical polymerization.
Claim 12
Dependent Claim
47 words
Method of preparing a coated abrasive comprising the steps of: (a) providing a coatable composition comprising a binder curable by free-radical polymerization having lapping size abrasive grains suspended therein, (b) coating said coatable composition on a backing, and (c) curing said composition by means of free-radical polymerization.
Claim 13
Dependent Claim
15 words
The method of claim 9 wherein said composition is cured by means of actinic radiation.
Claim 14
Dependent Claim
15 words
The method of claim 9 wherein said composition is cured by means of thermal energy.
Claim 15
Dependent Claim
18 words
The method of claim 9 wherein said composition comprises a monomer having at least two ethylenically unsaturated moieties.
Claim 16
Dependent Claim
12 words
The method of claim 9 wherein said composition includes a reactive diluent.
Claim 17
Dependent Claim
54 words
Method of preparing a coated abrasive comprising the steps of: (a) providing a coatable composition comprising a binder curable by free-radical polymerization having lapping size abrasive grains suspended therein, (b) coating said coatable composition on a backing, and (c) curing said composition by means of free-radical polymerization, wherein said composition includes a coupling agent.
Claim 18
Dependent Claim
54 words
Method of preparing a coated abrasive comprising the steps of: (a) providing a coatable composition comprising a binder curable by free-radical polymerization having lapping size abrasive grains suspended therein, (b) coating said coatable composition on a backing, and (c) curing said composition by means of free-radical polymerization, wherein said composition includes a coupling agent.
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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) | 1991-09-27 | 1992-03-28 | 1992-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-27 | 1996-03-28 | 1996-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-27 | 2000-03-28 | 2000-09-27 | $7700.00 | Window Closed / Lapsed |