Claims
- 1. A method for making a polymeric blast media comprising the steps of:
(a) blending a melamine compound with a cellulosic material and compression molding said first blend to produce a compression molded first blend, to produce a first blend and then cooling said first blend to produce a cooled first blend, and them grinding said cooled first blend to produce a particulate first blend; (b) blending a urea compound with a nano-clay material to produce a second blend and compression molding said second blend to produce a compression molded second blend, and then cooling said molded second blend to produce a cooled second blend, and then grinding said cooled second blend to produce a particulate second blend; (c) blending the particulate first blend with the particulate second blend.
- 2. The method of claim 1 wherein in step (a) the cellulosic material is alpha cellulose.
- 3. The method of claim 1 wherein in step (a) the first blend is compression molded at a temperature of from about 280° F. to about 330° F. and under a pressure of from about 300 tons per square inch to about 500 tons per square inch.
- 4. The method of claim 1 wherein in step (a) the cooled first blend is ground to from about 20/30 mesh to about 30/40 mesh.
- 5. The method of claim 1 wherein in step (b) the nano-clay is montmorillonite.
- 6. The method of claim 1 wherein in step (b) the second blend is compression molded at a temperature of from about 280° F. to about 330° F. and under a pressure of from about 300 tons per square inch to about 500 tons per square inch.
- 7. The method of claim I wherein in step (a) the cooled first blend is ground to fromabout a 20/30 mesh to about a 30/40 mesh particulate size.
- 8. The method of claim 1 wherein in step (c) the first blend and second blend are blended in a ratio of about 1:1 by weight.
- 9. The method of claim 1 wherein in step (c) the third blend has a mesh particulate size from about 10/40 mesh to about 30/60 mesh.
- 10. The method of claim 1 wherein an acrylic polymer is ground and then added to the blend in step (c).
- 11. The method of claim 1 wherein the acrylic polymer is a cross-linked cast polymer.
- 12. The method of claim 10 wherein the acrylic polymer is ground to from about a 20/30 mesh size to about a 30/40 mesh size.
- 13. The method of claim 10 wherein the acrylic polymer is blended in about equal proportion with the first blend and the second blend.
- 14. The method of claim 1 wherein in step (b) the second blend is ground to from about a 16/20 mesh size to about a 40/60 mesh size.
- 15. The method of claim 11 wherein the first blend, the second blend and the ground acrylic are blended in equal parts in step (c).
- 16. The method of claim 1 wherein after step (c) wherein the blast media is comprised of a plurality of individual particles which a polyurethane coating is applied.
- 17. The method of claim 1 wherein a dense particulate material selected from a glass oxide and a metal oxide is added to the blast media.
- 18. The method of claim 17 wherein the dense particulate material is a glass oxide material having a size of at least about −80 mesh.
- 19. The method of claim 17 wherein an aluminum oxide material having a grit size of from about 230 to 320.
- 20. The method of claim 1 wherein an about 30/40 mesh size melamine compound material and an about 20/30 mesh size allyldiglycol carbonate material are added to the first blend.
- 21. A product of a method of making a polymeric blast media comprising the steps of:
(a) blending a melamine compound with a cellulosic material and compression molding said first blend to produce a compression molded first blend, to produce a first blend and then cooling said first blend to produce a cooled first blend, and then grinding said cooled first blend to produce a particulate first blend; (b) blending a urea compound with a nano-clay material to produce a second blend and compression molding said second blend to produce a compression molded second blend, and then cooling said molded second blend to produce a cooled second blend, and then grinding said cooled second blend to produce a particulate second blend; (c) blending the particulate first blend with the particulate second blend.
- 22. The product of the method of claim 21 wherein in step (a) the cellulosic material is alpha cellulose.
- 23. The product of the method of claim 21 wherein in step (a) the first blend is compression molded at a temperature of from about 280° F. to about 330° F. and under a pressure of from about 300 tons per square inch to about 500 tons per square inch.
- 24. The product of the method of claim 21 wherein in step (a) the cooled first blend is ground to from about 20/30 mesh to about 30/40 mesh.
- 25. The product of the method of claim 21 wherein in step (b) the nano-clay is montmorillonite.
- 26. The product of the method of claim 21 wherein in step (b) the second blend is compression molded at a temperature of from about 280° F. to about 330° F. and under a pressure of from about 300 tons per square inch to about 500 tons per square inch.
- 27. The product of the method of claim 21 wherein in step (a) the cooled first blend is ground to fromabout a 20/30 mesh to about a 30/40 mesh particulate size.
- 28. The product of the method of claim 21 wherein in step (c) the first blend and second blend are blended in a ratio of about 1:1 by weight.
- 29. The product of the method of claim 21 wherein in step (c) the third blend has a mesh particulate size from about 10/40 to about 30/60.
- 30. The product of the method of claim 21 wherein an acrylic polymer is ground and then added to the blend in step (c).
- 31. The product of the method of claim 32 wherein the acrylic polymer is a cross-linked cast polymer.
- 32. The product of the method of claim 30 wherein the acrylic polymer is ground to from about a 20/30 mesh size to about a 30/40 mesh size.
- 33. The product of the method of claim 30 wherein the acrylic polymer is blended in about equal proportions with the first blend and the second blend.
- 34. The product of the method of claim 34 wherein in step (b) the second blend is ground to from about a 16/20 mesh size to about a 40/60 mesh size.
- 35. The product of the method of claim 35 wherein the first blend, the second blend and the ground acrylic are blended in equal parts in step (c).
- 36. The product of the method of claim 36 wherein after step (c) wherein the blast media is comprised of a plurality of individual particles which a polyurethane coating is applied.
- 37. The product of the method of claim 37 wherein a dense particulate material selected from a glass oxide and a metal oxide is added to the blast media.
- 38. The product of the method of claim 21 wherein the dense particulate material is a glass oxide material having a size of at least about −80 mesh.
- 39. The product of the method of claim 21 wherein an aluminum oxide material having a grit size of from about 230 to 320.
- 40. The product of the method of claim 21 wherein an about 30/40 mesh size melamine compound material and an about 20/30 mesh size allyldiglycol carbonate material are added to the first blend.
- 41. An abrasive media for the removal of coating or for the preparation of surfaces prior to coating or cleaning comprising:
a particulate thermosetting polymerwith an additive wherein said additive has a major dimension and a minor dimension and said minor dimension is from about 1 nm to about 20 nm.
- 42. The abrasive media of claim 1 wherein the minor dimension is about 1.0 nm.
- 43. The abrasive media of claim 41 wherein the additive is a nano-clay material.
- 44. The abrasive media of claim 43 wherein the nano-clay material is a montmorillonite clay.
- 45. The abrasive media of claim 41 wherein the filler component is a polyhedral oligomeric silsesquioxane material.
- 46. The abrasive material of claim 41 wherein the major dimension of the additive is from about 100 nm to about 1,000 nm.
- 47. The abrasive media of claim 41 wherein the additive has a platelet shape.
- 48. The abrasive media of claim 41 wherein the thermosetting polymer is selected from one or more of the group consisting of urea formaldehyde, melamine formaldehyde, phenol formaldehyde, polyester, polyurethane, and epoxy.
- 49. The abrasive media of claim 41 wherein the particulate thermosetting polymer is blended with a cellulosic material.
- 50. The abrasive material of claim 41 wherein the particulate thermosetting polymer is blended with a urea material.
- 51. A method of making a sanding pad for removing an organic coating from a substrate comprising the steps of:
(a) blending a liquid polymeric material with a nano-clay material to produce a first blend; (b) blending a cellulosic material with said first blend to produce a second blend; and (c) extruding the second blend to form a continuous sheet of abrasive material into a plurality of individual pads.
- 52. The method of claim 51 wherein after step (c) the continuous sheet of abrasive material is cut into a plurality of pads.
- 53. The method of claim 52 wherein in step (a) an abrasive material is added to the first blend.
- 54. The method of claim 53 wherein the abrasive material is aluminum oxide.
- 55. The method of claim 51 wherein in step (a) the nano-clay is montmorillonite.
- 56. The method of claim 51 wherein in step (a) the polymeric material is a polyurethane.
- 57. The method of claim 51 wherein the cellulosic material is alpha cellulose.
- 58. The method of claim 51 wherein in step (c) the second blend is foam extruded.
- 59. The method of claim 51 wherein in step (a) the polymeric material is heated.
- 60. The method of claim 52 wherein the abrasive material is added before the cellulosic material is added.
- 61. A product of the method of making a sanding pad for removing an organic coating from a substrate comprising the steps of:
(a) blending a liquid polymeric material with a nano-clay material to produce a first blend; (b) blending a cellulosic material with said first blend to produce a second blend; and (c) extruding the second blend to form a continuous sheet of abrasive material into a plurality of individual pads.
- 62. The product of the method of claim 61 wherein after step (c) the continuous sheet of abrasive material is cut into a plurality of pads.
- 63. The product of the method of claim 62 wherein in step (a) an abrasive material is added to the first blend.
- 64. The product of the method of claim 63 wherein the abrasive material is aluminum oxide.
- 65. The product of the method of claim 61 wherein in step (a) the nano-clay is montmorillonite.
- 66. The product of the method of claim 61 wherein in step (a) the polymeric material is a polyurethane.
- 67. The product of the method of claim 61 wherein the cellulosic material is alpha cellulose.
- 68. The product of the method of claim 61 wherein in step (c) the second blend is foam extruded.
- 69. The product of the method of claim 63 wherein the abrasive material is aluminum oxide grit.
- 70. The product of the method of claim 61 wherein in step (a) the polymeric material is heated.
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This application claims priority under U.S. Provisional Patent Application Serial No. 60/208,624, filed Jun. 1, 2000 and U.S. Provisional Patent Application Serial No. 60/226,135, filed Aug. 18, 2000.
Provisional Applications (2)
|
Number |
Date |
Country |
|
60226135 |
Aug 2000 |
US |
|
60208624 |
Jun 2000 |
US |