Claims
- 1. An abrasive article having a peripheral surface adapted to contact and abrade a workpiece, said abrasive article comprising a plurality of abrasive particles and a plurality of coated grinding aid particles, said coated grinding aid particles comprising grinding aid particles coated with an inert, hydrophobic, hydrocarbon-containing substance selected from the group consisting of fatty acids, fatty acid salts, and oils, and a binder in which said abrasive particles and said coated grinding aid particles are dispersed.
- 2. The abrasive article of claim 1, wherein said grinding aid particles are selected from the group consisting of organic halide compounds, halide salts, and metal alloys.
- 3. The abrasive article of claim 2, wherein said grinding aid particles are selected from the group consisting of cryolite and potassium tetrafluoroborate.
- 4. The abrasive article of claim 1, wherein said grinding aid particles have an average particle size of between about 1 and 150 micrometers.
- 5. The abrasive article of claim 1, wherein said coating on said grinding aid particles has an average thickness of between about 0.5 and 20 micrometers.
- 6. The abrasive article of claim 1, wherein said inert, hydrophobic, hydrocarbon-containing substance is non-polymeric.
- 7. The abrasive article of claim 1, wherein said inert, hydrophobic, hydrocarbon-containing substance is a lubricant.
- 8. The abrasive article of claim 1, wherein said substance is a fatty acid salt.
- 9. The abrasive article of claim 8, wherein said salt is selected from the group consisting of lithium, zinc, sodium, calcium, aluminum, nickel, lead, magnesium, and barium salts.
- 10. The abrasive article of claim 8, wherein said fatty acid has from 12 to 20 carbon atom.
- 11. The abrasive article of claim 8, wherein said fatty acid is stearic acid.
- 12. The abrasive article of claim 8, wherein said fatty acid salt is selected from the group consisting of magnesium stearate, sodium stearate, and aluminum stearate.
- 13. The abrasive article of claim 8, wherein said grinding aid particles are selected from the group consisting of organic halide compounds, halide salts, and metal alloys.
- 14. The abrasive article of claim 13, wherein said grinding aid particles comprise potassium tetrafluoroborate.
- 15. A coated abrasive article having a surface adapted to contact and abrade a workpiece, said coated abrasive article comprising a backing having a major surface, a make coat on said major surface of said backing, a plurality of abrasive particles adhered to said make coat, and a size coat comprising grinding aid particles coated with an inert, hydrophobic, hydrocarbon-containing substance selected from the group consisting of fatty acids, fatty acid salts, and oils.
- 16. The coated abrasive article of claim 15, wherein said grinding aid particles are selected from the group consisting of organic halide compounds, halide salts, and metal alloys.
- 17. The coated abrasive article of claim 16, wherein said grinding aid particles are selected from the group consisting of cryolite and potassium tetrafluoroborate.
- 18. The coated abrasive article of claim 15, wherein said coated abrasive article includes a peripheral coating comprising said binder and said coated grinding aid particles.
- 19. The coated abrasive article of claim 18, wherein said peripheral coating comprises a thermoset binder.
- 20. The coated abrasive article of claim 18, wherein said coated grinding aid particles are coated potassium tetrafluoroborate particles and said binder comprises a phenolic resin.
- 21. The coated abrasive article of claim 18, wherein said grinding aid particles comprise potassium tetrafluoroborate particles having an average particle size of between about 50 and 150 micrometers.
- 22. The coated abrasive article of claim 15, wherein said grinding aid particles have an particle size of between 1 and 150 micrometers.
- 23. The coated abrasive article of claim 15, wherein said coating on said coated grinding aid particles has an average thickness of 0.5 and 20 micrometers.
- 24. The coated abrasive article of claim 15, wherein said inert, hydrophobic, hydrocarbon-containing substance is a lubricant.
- 25. The coated abrasive article of claim 15, wherein said substance is a fatty acid salt.
- 26. The coated abrasive article of claim 25, wherein said salt is selected from the group consisting of lithium, zinc, sodium, calcium, aluminum, nickel, lead, magnesium, and barium salts.
- 27. The coated abrasive article of claim 25, wherein said fatty acid has from 12 to 20 carbon atom.
- 28. The coated abrasive article of claim 25, wherein said fatty acid is stearic acid.
- 29. The coated abrasive article of claim 25, wherein said fatty acid salt is selected from the group consisting of magnesium stearate, sodium stearate, and aluminum stearate.
- 30. The coated abrasive article of claim 15, wherein said grinding aid particles comprise potassium tetrafluoroborate.
- 31. The coated abrasive article of claim 18, wherein said grinding aid particles comprise potassium tetrafluoroborate and said binder comprises a phenolic resin.
- 32. The coated abrasive article of claim 31, wherein said potassium tetrafluoroborate particles are coated with a fatty acid salt.
- 33. The coated abrasive article of claim 31, wherein said potassium tetrafluoroborate particles are coated with an oil selected from the group consisting of mineral oils and peanut oil.
- 34. A bonded abrasive article having a peripheral surface adapted to contact and abrade a workpiece, said bonded abrasive article comprising a plurality of abrasive particles, a plurality of coated grinding aid particles, said coated grinding aid particles comprising grinding aid particles coated with a substance selected from the group consisting of fatty acids, fatty acid salts, and oils, and a binder in which said abrasive particles and said coated grinding aid particles are dispersed and which bonds said abrasive particles and said coated grinding aid particles together to form a shaped mass.
- 35. The bonded abrasive article of claim 34, wherein said grinding aid particles comprise potassium tetrafluoroborate.
- 36. The bonded abrasive article of claim 35, wherein said potassium tetrafluoroborate particles are coated with a fatty acid salt.
- 37. A nonwoven abrasive having at least one major surface and an interior region, said article comprising an open, lofty web of organic fibers, a plurality of abrasive particles, a plurality of coated grinding aid particles, said coated grinding aid particles comprising grinding aid particles coated within a substance selected from the group consisting of fatty acids, fatty acid salts, and oils, and a binder in which said abrasive particles and said coated grinding aid particles are dispersed and which binds said abrasive particles and said coated grinding aid particles to said open, lofty web.
- 38. The nonwoven abrasive article of claim 37, wherein said grinding aid particles comprise potassium tetrafluoroborate.
- 39. The nonwoven abrasive article of claim 37, wherein said potassium tetrafluoroborate particles are coated with a fatty acid salt.
- 40. A method of making an abrasive article having a surface adapted to contact and abrade a workpiece, said method comprising
- coating a plurality of grinding aid particles with a substance selected from the group consisting of fatty acids, fatty acid salts, and oils to provide a plurality of coated grinding aid particles;
- providing a plurality of abrasive particles;
- dispersing said coated grinding aid particles and said abrasive particles in a binder precursor; and
- solidifying said binder precursor.
- 41. The method of claim 40, wherein said coated grinding aid particles and said abrasive particles are dispersed in said binder without the use of a dispersing agent or an antifoam agent.
- 42. A coated abrasive article having a surface adapted to contact and abrade a workpiece, said coated abrasive article comprising a backing having a major surface, a make coat on said major surface of said backing, a plurality of abrasive particles adhered to said make coat, a size coat, and a supersize coat comprising grinding aid particles coated with an inert, hydrophobic, hydrocarbon-containing substance selected from the group consisting of fatty acids, fatty acid salts, and oils.
- 43. A coated abrasive article having a surface adapted to contact and abrade a workpiece, said coated abrasive article comprising a backing having a major surface, a plurality of abrasive particles, a plurality of coated grinding aid particles, said coated grinding aid particles comprising grinding aid particles coated with a substance selected from the group consisting of fatty acids, fatty acid salts, and oils, and a binder in which said abrasive particles and said coated grinding aid particles are dispersed.
Parent Case Info
This is a continuation of Application Ser. No. 08/538,183, filed Aug. 23, 1995, now abandoned, which is a continuation of Application Ser. No. 08/214,394, filed Mar. 16, 1994, now abandoned.
US Referenced Citations (20)
Foreign Referenced Citations (4)
Number |
Date |
Country |
0299950A1 |
Jan 1989 |
EPX |
0418738A2 |
Mar 1991 |
EPX |
0464850A2 |
Jan 1992 |
EPX |
0486308A2 |
May 1992 |
EPX |
Continuations (2)
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Number |
Date |
Country |
Parent |
538183 |
Aug 1995 |
|
Parent |
214394 |
Mar 1994 |
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