Claims
- 1. A method for making a polymeric blast media comprising the steps of:
(a) blending a melamine compound with a cellulosic material to form a first blend; (b) compression molding said first blend to produce a compression molded first blend; (c) cooling said compression molded first blend to produce a cooled first blend; (d) grinding said cooled first blend to produce a particulate first blend; (e) blending a urea compound with a nano-clay material to produce a second blend; (f) compression molding said second blend to produce a compression molded second blend; (g) cooling said compression molded second blend to produce a cooled second blend; (h) grinding said cooled second blend to produce a particulate second blend; (i) blending the particulate first blend with the particulate second blend to form a third 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 (b) the first blend is compression
- 4. The method of claim 1 wherein in step (d) 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 (e) the nano-clay is montmorillonite.
- 6. The method of claim 1 wherein in step (f) 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 1 wherein in step (h) the cooled second blend is ground to from about 16/20 mesh size to about 40/60 mesh particulate size.
- 8. The method of claim 1 wherein in step (i) 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 (i) 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 (i).
- 11. The method of claim 10 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 after step (c) wherein the blast media is comprised of a plurality of individual particles which a polyurethane coating is applied.
- 15. The method of claim 1 wherein a dense particulate material selected from a glass oxide and a metal oxide is added to the first blend.
- 16. The method of claim 15 wherein the dense particulate material is a glass oxide material having a size of at least about −80 mesh.
- 17. The method of claim 15 wherein the dense particulate material is an aluminum oxide material having a grit size of from about 230 to 320.
- 18. 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.
- 19. A product of a method of making a polymeric blast media comprising the steps of:
(a) blending a melamine compound with a cellulosic material to form a first blend; (b) compression molding said first blend to produce a compression molded first blend; (c) cooling said compression molded first blend to produce a cooled first blend; (d) grinding said cooled first blend to produce a particulate first blend; (e) blending a urea compound with a nano-clay material to produce a second blend; (f) compression molding said second blend to produce a compression molded second blend; (g) cooling said molded second blend to produce a cooled second blend; (h) grinding said cooled second blend to produce a particulate second blend; (i) blending the particulate first blend with the particulate second blend to form a third blend.
- 20. The product of the method of claim 19 wherein in step (a) the cellulosic material is alpha cellulose.
- 21. The product of the method of claim 19 wherein step (b) the first blend if compression molded at a temperature of from about 280° F. to about 300° F. and under a pressure of from about 300 tons per square inch to about 500 tons per square inch.
- 22. The product of the method of claim 19 wherein in step (c) the cooled first blend is ground to from about 20/30 mesh to about 30/40 mesh.
- 23. The product of the method of claim 19 wherein in step (e) the nano-clay is montmorillonite.
- 24. The product of the method of claim 19 wherein in step (h) 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.
- 25. The product of the method of claim 19 wherein in step (i) the first blend and second blend are blended in a ratio of about 1:1 by weight.
- 26. The product of the method of claim 19 wherein in step (i) the third blend has a mesh particulate size from about 10/40 to about 30/60.
- 27. The product of the method of claim 19 wherein an acrylic polymer is ground and then added to the blend in step (i).
- 28. 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.
- 29. The method of claim 28 further comprising the step of cutting the continuous sheet of abrasive material into a plurality of individual pads.
- 30. The method of claim 28 further comprising the step of adding an abrasive material to the first blend.
- 31. The method of claim 30 wherein the abrasive material is aluminum oxide.
- 32. The method of claim 28 wherein in step (a) the nano-clay is montmorillonite.
- 33. The method of claim 28 wherein in step (a) the polymeric material is a polyurethane.
- 34. The method of claim 28 wherein in step (b) the cellulosic material is alpha cellulose.
- 35. The method of claim 28 wherein in step (c) the second blend is foam extruded.
- 36. The method of claim 28 further comprising the step of heating the polymeric material.
- 37. 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.
- 38. The product of the method of claim 37 further comprising the step of cutting the continuous sheet of abrasive material into a plurality of individual pads.
- 39. The product of the method of claim 37 further comprising the step of adding an abrasive material to the first blend.
- 40. The product of the method of claim 39 wherein the abrasive material is aluminum oxide.
- 41. The product of the method of claim 40 wherein the abrasive material is aluminum oxide grit.
- 42. The product of the method of claim 37 wherein in step (a) the nano-clay is montmorillonite.
- 43. The product of the method of claim 37 wherein in step (a) the polymeric material is a polyurethane.
- 44. The product of the method of claim 37 wherein in step (b) the cellulosic material is alpha cellulose.
- 45. The product of the method of claim 37 wherein in step (c) the second blend is foam extruded.
- 46. The product of the method of claim 35 further comprising the step of heating the polymeric material.
Parent Case Info
[0001] This is a division of U.S. patent application Ser. No. 09/871,762, filed Jun. 1, 2001, the entire specification of which is incorporated herein by reference.
Provisional Applications (2)
|
Number |
Date |
Country |
|
60226135 |
Aug 2000 |
US |
|
60208624 |
Jun 2000 |
US |
Divisions (1)
|
Number |
Date |
Country |
Parent |
09871762 |
Jun 2001 |
US |
Child |
10392043 |
Mar 2003 |
US |