High density composite material

• US 6,048,379 A
• Filed: 06/27/1997
• Issued: 04/11/2000
• Est. Priority Date: 06/28/1996
• Status: Expired due to Term

• Current Assignee: Ideas To Market, L.P.
• Original Assignee: Ideas To Market, L.P.
• Inventors: Bray, Alan V., Muskopf, Brian A., Dingus, Michael L.
• Primary Examiner(s): MAI, NGOCLAN THI
• Application Number:
  US08/884,001
• Time in Patent Office: 1,019 Days
• Field of Search: 75/229, 75/231, 75/248, 428/546, 250/515.1, 250/517.1, 250/519.1, 102/517
• US Class Current: 75/229
• CPC Class Codes: A01K 95/005 Sinkers not containing lead
• CPC Class Codes: C08K 3/08 Metals
• CPC Class Codes: C08K 7/02 Fibres or whiskers
• CPC Class Codes: C22C 32/0094 with organic materials as the main non-metallic constituent, e.g. resin
• CPC Class Codes: C22C 47/14 by powder metallurgy, i.e. by processing mixtures of metal powder and fibres or filaments
• CPC Class Codes: C22C 49/00 Alloys containing metallic or non-metallic fibres or filaments
• CPC Class Codes: C22C 49/10 Refractory metals
• CPC Class Codes: C22C 49/14 characterised by the fibres or filaments
• CPC Class Codes: F42B 12/745 the core being made of plastics; Compounds or blends of plastics and other materials, e.g. fillers
• CPC Class Codes: G21F 1/103 Dispersions in organic carriers
• CPC Class Codes: Y10T 428/12014 having metal particles

Abstract

The present invention is related to a family of materials that may act as a replacement for lead in applications where the high density of lead is important, but where the toxicity of lead is undesirable. The present invention more particularly provides a high density material comprising tungsten, fiber and binder. Methods and compositions of such materials and applications thereof are disclosed herein.

Claims

1. A high density composition of matter, comprising:

a. tungsten powder;

b. stainless steel fiber; and

c. a binder.

2. The composition according to claim 1, wherein the tungsten comprises between about 5% and about 95% of the composite weight.

3. The composition according to claim 2, wherein the tungsten comprises between about 10% and about 80% of the composite weight.

4. The composition according to claim 3, wherein the tungsten comprises between about 15% and about 70% of the composite weight.

5. The composition according to claim 4, wherein the tungsten comprises between about 25% and about 50% of the composite weight.

6. The composition according to claim 5, wherein the tungsten comprises between about 35% and about 40% of the composite weight.

7. The composition according to claim 1, wherein the tungsten powder size is between about 2 and about 40 microns in diameter.

8. The composition of claim 7, wherein the tungsten powder size is between about 4 and about 8 microns in diameter.

9. The composition of claim 7, wherein the tungsten powder is between about 20 and about 40 microns in diameter.

10. The composition according to claim 1 wherein the fiber comprises between about 3% and 30% of the composite weight.

11. The composition according to claim 10, wherein the fiber comprises between about 10% and 20% of the composite.

12. The composition according to claim 11, wherein the fiber comprises between about 15% and 18% of the composite weight.

13. The composition according to claim 1, wherein the binder is a polymeric binder.

14. The composition according to claim 13, wherein the polymeric binder is nylon 12®

.

15. The composition according to claim 13, wherein the polymeric binder comprises between about 1% to about 30% composite weight.

16. The composition according to claim 15, wherein the polymeric binder comprises between about 2% to about 20% composite weight.

17. The composition according to claim 16, wherein the polymeric binder comprises between about 5% to about 15% composite weight.

18. The composition according to claim 17, wherein the polymeric binder comprises between about 8% to about 12% composite weight.

72. The composition according to claim 13, wherein the polymeric binder comprises at least one of cellulose, fluoro-polymer, ethylene inter-polymer alloy elastomer, ethylene vinyl acetate, ionomer, nylon, polyether imide, polyamide, polyurethane, polyester elastomer, polyester sulfone, polyphenyl amide, polypropylene, polyvinylidene fluoride or thermoset polyurea elastomer, acrylics, homopolymers, acetates, copolymers, acrylonitrile-butadinen-styrene, thermoplastic fluoro polymers, inomers, polyamides, polyamide-imides, polyacrylates, polyatherketones, polyaryl-sulfones, polybenzimidazoles, polycarbonates, polybutylene, terephthalates, polyether imides, polyether sulfones, thermoplastic polyimides, thermoplastic polyurethanes, polyphenylene sulfides, polyethylene, polypropylene, polysulfones, polyvinylchlorides, styrene acrylonitriles, polystyrenes, polyphenylene, ether blends, styrene maleic anhydrides, polycarbonates, allyls, aminos, cyanates, epoxies, phenolics, unsaturated polyesters, bismaleimides, polyurethanes, silicones, vinylesters, or urethane hybrids.

19. A high density composition of matter, comprising:

tungsten powder, wherein the tungsten powder comprises a first group of particles having sizes of between about 2 microns and about 8 microns, and a second group of particles having sizes of between about 20 microns and 40 microns; and

a binder.

20. The high density composition of claim 19, wherein the binder comprises a polymeric binder.

21. The high density composition of claim 19 wherein the tungsten comprises a concentration of between about 80% and about 96% and the polymeric binder comprises a concentration of between about 4% and about 20%.

22. The high density composition of claim 19, wherein the first group of particles further comprises:

a third group of particles having sizes of between about 2 microns and about 4 microns; and

a fourth group of particles having sizes of between about 4 microns and about 8 microns.

23. The high density composition of claim 19, wherein the binder comprises Nylon 12®

.

24. The high density composition of claim 19, wherein the composition has a specific gravity of at least 11.0.

25. The high density composition according to claim 19 utilized as a projectile.

26. The high density composition according to claim 25, wherein the projectile is a small arms projectile.

27. The high density composition according to claim 19 utilized as shot.

28. The high density composition according to claim 19 utilized as a container for radioactive material.

29. The high density composition according to claim 19 utilized as a vibration damping material.

30. The high density composition according to claim 19 utilized as a flywheel.

31. The high density composition according to claim 19 utilized as a weight.

32. The high density composition according to claim 19 utilized as an acoustic damping material.

33. A high density composition of matter, comprising:

a. tungsten powder;

b. a fiber, wherein the fiber comprises at least one of tungsten fibers, copper, nickel, niobium, Kevlar®

, Spectra®

, graphite, boron, cellulose or cotton; and

c. nylon 12®

.

34. The high density composition of claim 33, wherein the fiber comprises metal fibers.

35. The high density composition of claim 33 utilized as a projectile.

36. The high density composition of claim 33, wherein the projectile is a small arms projectile.

37. The high density composition according to claim 33 utilized as shot.

38. The high density composition according to claim 33 utilized as a shielding container for radioactive material.

39. The high density composition according to claim 33 utilized as a vibration damping material.

40. The high density composition according to claim 33 utilized as a flywheel.

41. The high density composition according to claim 33 utilized as a weight.

42. The high density composition according to claim 33 utilized as an acoustic damping material.

43. A radiation shielding material made from a high density composition of matter, the composition comprising:

a) tungsten powder, wherein the tungsten powder comprises a first group of particles having sizes of between about 2 microns and about 8 microns, and a second group of particles having sizes of between about 20 microns and 40 microns; and

b) a polymeric binder.

44. The radiation shielding material of claim 43 wherein the polymeric binder comprises polyurethane prepolymer, cellulose, fluoro-polymer, ethylene inter-polymer alloy elastomer, ethylene vinyl acetate, nylon, polyether imide, polyester elastomer, polyester sulfone, polyphenyl amide, polypropylene, polyvinylidene fluoride or thermoset polyurea elastomer, acrylics, homopolymers, acetates, copolymers, acrylonitrile-butadinen-styrene, thermoplastic fluoro polymers, inomers, polyamides, polyamide-imides, polyacrylates, polyatherketones, polyaryl-sulfones, polybenzimidazoles, polycarbonates, polybutylene, terephthalates, polyether imides, polyether sulfones, thermoplastic polyimides, thermoplastic polyurethanes, polyphenylene sulfides, polyethylene, polypropylene, polysulfones, polyvinylchlorides, styrene acrylonitriles, polystyrenes, polyphenylene, ether blends, styrene maleic anhydrides, polycarbonates, allyls, aminos, cyanates, epoxies, phenolics, unsaturated polyesters, bismaleimides, polyurethanes, silicones, vinylesters, or urethane hybrids.

45. The radiation shielding material of claim 43 formed into sheets or blocks.

46. The radiation shielding material of claim 43 further formed into a housing.

47. The radiation shielding material of claim 43 used within radiation shielding clothing.

48. The radiation shielding material of claim 43 used as a radiation sealant material.

49. A high density composition of matter, comprising:

tungsten powder, wherein the tungsten powder comprises a first group of particles having sizes in a first range, a second group of particles having sizes in a second range, and a third group of particles having sizes in a third range; and

a binder.

50. The composition of claim 49, wherein the binder comprises a polymeric binder.

51. A composition according to claim 49, wherein the polymeric binder comprises at least one of polyurethane prepolymer, cellulose, fluoro-polymer, ethylene inter-polymer alloy elastomer, ethylene vinyl acetate, nylon, polyether imide, polyester elastomer, polyester sulfone, polyphenyl amide, polypropylene, polyvinylidene fluoride or thermoset polyurea elastomer, acrylics, homopolymers, acetates, copolymers, acrylonitrile-butadinen-styrene, thermoplastic fluoro polymers, inomers, polyamides, polyamide-imides, polyacrylates, polyatherketones, polyaryl-sulfones, polybenzimidazoles, polycarbonates, polybutylene, terephthalates, polyether imides, polyether sulfones, thermoplastic polyimides, thermoplastic polyurethanes, polyphenylene sulfides, polyethylene, polypropylene, polysulfones, polyvinylchlorides, styrene acrylonitriles, polystyrenes, polyphenylene, ether blends, styrene maleic anhydrides, polycarbonates, allyls, aminos, cyanates, epoxies, phenolics, unsaturated polyesters, bismaleimides, polyurethanes, silicones, vinylesters, or urethane hybrids.

52. The high density composition of claim 49 utilized as a projectile.

53. The high density composition of claim 49, wherein the projectile is a small arms projectile.

54. The high density composition according to claim 49 utilized as shot.

55. The high density composition according to claim 49 utilized as a shielding container for radioactive material.

56. The high density composition according to claim 49 utilized as a vibration damping material.

57. The high density composition according to claim 49 utilized as a flywheel.

58. The high density composition according to claim 49 utilized as a weight.

59. The high density composition according to claim 49 utilized as an acoustic damping material.

60. The high density composition according to claim 49 utilized as a radiation shielding material.

61. The composition of claim 49, wherein the binder comprises a polymeric thermoplastic binder.

62. A high density composition of matter, comprising:

tungsten powder, wherein the tungsten powder comprises a first group of particles having sizes in a first range, a second group of particles having sizes in a second range, and a third group of particles having sizes in a third range; and

nylon 12®

.

63. The high density composition of claim 62 utilized as a projectile.

64. The high density composition of claim 62, wherein the projectile is a small arms projectile.

65. The high density composition according to claim 62 utilized as shot.

66. The high density composition according to claim 62 utilized as a shielding container for radioactive material.

67. The high density composition according to claim 62 utilized as a vibration damping material.

68. The high density composition according to claim 62 utilized as a flywheel.

69. The high density composition according to claim 62 utilized as a weight.

70. The high density composition according to claim 62 utilized as an acoustic damping material.

71. The high density composition according to claim 62 utilized as a radiation shielding material.