Patent US6275818B1 successfully refreshed from Google Patents.
Patent US5342419A successfully refreshed from Google Patents.
US5342419A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasive composites having a controlled rate of erosion, articles incorporating same, and methods of making and using same
Assignee: 3M Co
•
Filing: 1992-12-31
•
Granted: 1994-08-30
•
Expires: 2012-12-31
Abstract
Abstract An abrasive composite is presented having a controlled rate of erosion, the composite comprising abrasive particles dispersed in the binder, wherein the binder comprises an addition polymerized resin having clay particles dispersed therein. The abrasive composite may be adhered to various substrates, including paper, cloth, polymeric films, and nonwovens. The clay particles allow the binder, and thus the composite, to controllably erode upon abrasion of a workpiece, thus exposing fresh abrasive particles to the workpiece. Coatable compositions comprising clay particles dispersed in a binder precursor composition, and optionally containing abrasive particles, are also described, as well as methods of making and using the composites and articles.
Inventors
- 👤 Louis D. Hibbard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:58
CPC Classifications
B; B24; B24D; B24D3/00; B24D3/02; B24D3/20; B24D3/28; B24C; B24C1/00; B24D11/00; B24D3/34; B24D3/342; B24D3/344; C; C08; C08K; C08K3/00; C08K3/34; C08K3/346
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
76 words
A coated abrasive exhibiting controlled erosion of its abrasive surface, the coated abrasive comprising: (a) a backing having a front and a back surface; and (b) attached to at least one of said front or said back surface, in an array having a non-random pattern, a plurality of precisely shaped abrasive composites, each of the abrasive composites comprising abrasive particles dispersed in a binder, the binder comprising an addition polymerized resin having clay particles dispersed therein.
Claim 2
Dependent Claim
76 words
A coated abrasive exhibiting controlled erosion of its abrasive surface, the coated abrasive comprising: (a) a backing having a front and a back surface; and (b) attached to at least one of said front or said back surface, in an array having a non-random pattern, a plurality of precisely shaped abrasive composites, each of the abrasive composites comprising abrasive particles dispersed in a binder, the binder comprising an addition polymerized resin having clay particles dispersed therein.
Claim 3
Dependent Claim
26 words
A coated abrasive in accordance with claim 1 wherein the addition polymerized resin is selected from the group consisting of ethylenically unsaturated resins and epoxy resins.
Claim 4
Dependent Claim
53 words
A coated abrasive in accordance with claim 2 wherein said ethylenically unsaturated resin is selected from the group consisting of acrylated urethane resins, styrene, divinylbenzene, vinyl toluene, aminoplast resins having pendant unsaturated carbonyl groups, isocyanurate resins having at least one pendant acrylate group, and isocyanate resins having at least one pendant acrylate group.
Claim 5
Dependent Claim
24 words
A coated abrasive in accordance with claim 3 wherein said isocyanurate resin is a combination of triacrylate of tris(hydroxyethyl) isocyanurate and trimethylol propane triacrylate.
Claim 6
Dependent Claim
26 words
A slurry comprising clay particles dispersed in an addition polymerizable resin, said slurry having abrasive particles having a Moh's hardness of at least 8 dispersed therein.
Claim 7
Dependent Claim
26 words
A slurry comprising clay particles dispersed in an addition polymerizable resin, said slurry having abrasive particles having a Moh's hardness of at least 8 dispersed therein.
Claim 8
Dependent Claim
27 words
A slurry in accordance with claim 5, wherein the dry weight percentage of clay particles in the composition ranges from about 1 to about 50 weight percent.
Claim 9
Dependent Claim
27 words
A slurry in accordance with claim 5, wherein the dry weight percentage of clay particles in the composition ranges from about 5 to about 30 weight percent.
Claim 10
Dependent Claim
43 words
A slurry in accordance with claim 5, which comprises on a dry weight basis between about 20 to about 95 percent abrasive particles, from about 3 to about 78 percent addition polymerizable resin, and from about 2 to about 50 percent clay particles.
Claim 11
Dependent Claim
163 words
A coated abrasive exhibiting controlled erosion of its abrasive surface, the coated abrasive comprising: (a) a polyester film backing having a front and a back surface, the front surface of the polyester film containing an ethylene acrylic acid copolymer primer; and (b) attached to the front surface, in an array having a non-random pattern, a plurality of pyramidal shaped abrasive composites, the pattern being asymmetric, each of said composites comprising a square base, each base having a first and a second width, each composite further comprising a height, said first base width being about 360 micrometers, said second base width being about 400 micrometers, said composite height being about 180 micrometers, each of the pyramidal shaped abrasive composites comprising a plurality of white aluminum oxide abrasive particles dispersed in a binder, the binder comprising an addition polymerized resin having a plurality of clay particles dispersed therein, said addition polymerized resin comprising a reaction product of triacrylates of tris(hydroxyethyl) isocyanurate and trimethylol propane triacrylate.
Claim 12
Dependent Claim
163 words
A coated abrasive exhibiting controlled erosion of its abrasive surface, the coated abrasive comprising: (a) a polyester film backing having a front and a back surface, the front surface of the polyester film containing an ethylene acrylic acid copolymer primer; and (b) attached to the front surface, in an array having a non-random pattern, a plurality of pyramidal shaped abrasive composites, the pattern being asymmetric, each of said composites comprising a square base, each base having a first and a second width, each composite further comprising a height, said first base width being about 360 micrometers, said second base width being about 400 micrometers, said composite height being about 180 micrometers, each of the pyramidal shaped abrasive composites comprising a plurality of white aluminum oxide abrasive particles dispersed in a binder, the binder comprising an addition polymerized resin having a plurality of clay particles dispersed therein, said addition polymerized resin comprising a reaction product of triacrylates of tris(hydroxyethyl) isocyanurate and trimethylol propane triacrylate.
References Cited (Backward Citations)
US2322156A
Cited
US2534805A
Cited
US2676892A
Cited
US2806772A
Cited
US2958593A
Cited
US3510283A
Cited
US3689346A
Cited
US4202952A
Cited
US4318766A
Cited
US4576850A
Cited
US4588419A
Cited
EP0109581A2
Cited
US4642126A
Cited
US4652275A
Cited
US4652274A
Cited
US4773920B1
Cited
US4773920A
Cited
US4644703A
Cited
US4751138A
Cited
US4735632A
Cited
US4828583A
Cited
EP0306162B1
Cited
EP0306161A2
Cited
US4871376A
Cited
US4985340A
Cited
US5011512A
Cited
US4927431A
Cited
US4903440A
Cited
US4933373A
Cited
US5014468A
Cited
US5011513A
Cited
US5152917A
Cited
US5152917B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-08-29 | 1998-02-28 | 1998-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-08-29 | 2002-02-28 | 2002-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-08-29 | 2006-02-28 | 2006-08-30 | $7700.00 | Window Closed / Lapsed |