A malleable high density polymer material having a high density metal component and a polymer phase consisting of a rigid or hard component, and an elastomeric modifier for the hard component, and where the elastomeric component is chosen from one of several narrow molecular weight distribution ethy
A malleable high density polymer material having a high density metal component and a polymer phase consisting of a rigid or hard component, and an elastomeric modifier for the hard component, and where the elastomeric component is chosen from one of several narrow molecular weight distribution ethylene/alpha-olefin elastomers. One advantage of the present invention is to achieve a surprisingly malleable, high density material that has unusual melt properties which may be used as a lead substitute in the making of for example, projectiles, shot, or angling weights. Another advantage of the present invention is to provide a lead substitute that is non-toxic.
대표청구항▼
1. A malleable, high density composite material comprising: a high density metal component comprising from 70 to 96 weight percent of the composite material based on an overall weight of the composite material; a polymer phase comprising a blend of polymers having a hard component and an elastom
1. A malleable, high density composite material comprising: a high density metal component comprising from 70 to 96 weight percent of the composite material based on an overall weight of the composite material; a polymer phase comprising a blend of polymers having a hard component and an elastomeric component of a narrow molecular weight distribution ethylene/alpha-olefin elastomer. 2. The material of claim 1, wherein the material has a density of between 5 to 13 g/cc. 3. The material of claim 1, wherein the hard component is a polymer selected from the group consisting of olefins, olefin copolymers, ethylene vinyl acetate, polyethylene, polypropylene, copolymers of polyethylene and copolymers of polypropylene. 4. The material of claim 1, wherein the elastomeric component is prepared with a metallocene catalyst. 5. The material of claim 4, wherein the elastomeric component is prepared with a metallocene single site constrained geometry catalyst. 6. The material of claim 4, wherein the elastomeric component is a polyolefin elastomer. 7. The material of claim 4, wherein the elastomeric component is an ethylene based plastomer. 8. The material of claim 1, wherein the weight ratio of the hard component to the elastomeric component is between 90:10 to 30:70. 9. The material of claim 1, which also comprises a heat stabilizer. 10. The material of claim 9, wherein the heat stabilizer is di-tertiary butyl phenol. 11. The material of claim 1, which also comprises an oxidative stabilizer. 12. The material of claim 11, wherein the oxidative stabilizer is tris-nonylphenyl phosphite. 13. The material of claim 1, which also comprises a dispersion aiding component. 14. The material of claim 13, wherein the dispersion component is selected from the group consisting of silanes and titanates. 15. The material of claim 1, which also comprises a mold release agent. 16. The material of claim 15, wherein the mold release agent is a wax. 17. The material of claim 15, wherein the mold release agent is a stearate. 18. The material of claim 1, wherein the metal component is present in the material at a weight percentage of between 70% and 96% and has a density such that the overall material density is between 5 g/cc and 13 g/cc. 19. The material of claim 18, wherein the metal component is at least one of iron, tin, nickel, bismuth, cobalt, tungsten, tungsten carbide and alloys and oxides thereof. 20. The material of claim 19, wherein the metal component is tungsten carbide having tungsten, carbon and cobalt components. 21. A firearm ammunition comprising: a high density metal component comprising from 70 to 96 weight percent of the firearm ammunition based on an overall weight of the firearm ammunition; a polymer phase comprising a blend of polymers having a hard component and an elastomeric component of a narrow molecular weight distribution ethylene/alpha-olefin elastomer. 22. The firearm ammunition of claim 21, wherein the firearm ammunition has a matte surface finish with at least some surface texture.
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이 특허에 인용된 특허 (4)
Sullivan Michael J. ; Kennedy Thomas J. ; Nealon John L. ; Shannon Kevin J., Golf ball with soft core.
Mravic Brian (North Haven CT) Mahulikar Deepak (Madison CT) Violette Gerald N. (New Haven CT) Shapiro Eugene (Hamden CT) Halverson Henry J. (Collinsville IL), Lead-free bullett.
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