Claims
- 1. A magnetic composition, comprising:
a polymeric mixture, the polymeric mixture including;
i) ethylene-propylene rubber; and ii) acrylic copolymer; an additive, which is a functional agent selected from the group of a tackifier or a flexibility agent; and a magnetic material, the magnetic material being at least partially formed of a ceramic.
- 2. A magnetic composition as in claim 1 wherein the composition exhibits a peel strength at 90° of greater than 45 grams per millimeter upon attachment to a metal component.
- 3. A magnetic composition as in claim 1 wherein the halogenated elastomer is a brominated elastomer that is derived from a copolymer of isobutylene and p-methylstyrene.
- 4. A magnetic composition as in claim 1 wherein between about 7% and about 15% of the ethylene-propylene rubber is greater than about 55% by weight ethylene content.
- 5. A magnetic composition as in claim 4 wherein the between about 7% and about 15% of the ethylene-propylene rubber is greater than about 70% by weight ethylene content.
- 6. A magnetic composition as in claim 1 wherein the polymeric mixture includes a sub-mixture of a polyisobutylene and polymethylstyrene.
- 7. A magnetic composition as in claim 1 wherein the magnetic material is a ferrite.
- 8. A magnetic composition as in claim 1 further comprising a blowing agent, a blowing agent accelerator and a curing agent.
- 9. A magnetic composition, comprising:
a polymeric mixture, the polymeric mixture including;
i) ethylene-propylene rubber; ii) acrylic copolymer; and iii) halogenated elastomer; tackifying agent, the tackifying agent being a hydrocarbon; and a magnetic material, the magnetic material being at least partially formed of a ceramic and including a ferrite.
- 10. A magnetic composition as in claim 1 wherein the composition exhibits a peel strength at 90° of greater than 45 grams per millimeter upon attachment to a metal component.
- 11. A magnetic composition as in claim 1 wherein the halogenated elastomer is a brominated elastomer that is derived from a copolymer of isobutylene and p-methylstyrene.
- 12. A magnetic composition as in claim 1 wherein between about 7% and about 15% of the ethylene-propylene rubber is greater than about 55% by weight ethylene content.
- 13. A magnetic composition as in claim 12 wherein the between about 7% and about 15% of the ethylene-propylene rubber is greater than about 70% by weight ethylene content.
- 14. A magnetic composition as in claim 1 wherein the polymeric mixture includes a sub-mixture of a polyisobutylene and polymethylstyrene.
- 15. A magnetic composition as in claim 1 further comprising a blowing agent, a blowing agent accelerator and a curing agent.
- 16. A magnetic composition, comprising:
a polymeric mixture, the polymeric mixture including;
i) ethylene-propylene rubber present in an amount between about 3% and about 10% by weight of the composition; and ii) acrylic copolymer; iii) halogenated elastomer; iv) polybutene; and v) a sub-mixture of elastomer and styrenic material a tackifying agent, the tackifying agent being an aromatically modified C5 hydrocarbon tackifying resin; a paraffinic oil; a coumarone-indene resin; a blowing agent, the blowing agent present in an amount between 0% and about 5% by weight of the composition; a curing agent, the curing agent present in an amount between about 0.01% and about 3% by weight of the composition reinforcement material, the reinforcement material being at least partially formed of polyamide fibers, the reinforcement material present in an amount between about 0.008% and about 3% by weight of the composition; and a magnetic material present in an amount between about 10% and about 60% by weight of the composition, the magnetic material being at least partially formed of a ceramic, the magnetic material at least partially selected from the group of barium ferrite, strontium ferrite or combinations thereof.
- 17. A magnetic composition as in claim 1 wherein the composition exhibits a peel strength at 90° of greater than 45 grams per millimeter upon attachment to a metal component.
- 18. A magnetic composition as in claim 1 wherein the halogenated elastomer is a brominated elastomer that is derived from a copolymer of isobutylene and p-methylstyrene.
- 19. A magnetic composition as in claim 1 wherein between about 7% and about 15% of the ethylene-propylene rubber is greater than about 70% by weight ethylene content.
CLAIM OF BENEFIT OF FILING DATE
[0001] The present application claims the benefit of the filing date of U.S. Provisional Application Serial No. 60/351,950 (filed Jan. 25, 2002), hereby incorporated by reference.
Provisional Applications (1)
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Number |
Date |
Country |
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60351950 |
Jan 2002 |
US |