초록

A magnetic composition is disclosed. The composition includes a polymeric mixture and a magnetic material.

대표청구항 ▼

1. A magnetic composition, comprising:a polymeric mixture, the polymeric mixture including;i) ethyle-propylene rubber; andii) acrylic polymer;an additive, which is selected from the group of a tackifier or a flexibility agent; anda magnetic material, the magnetic material being at least partially fo

1. A magnetic composition, comprising:a polymeric mixture, the polymeric mixture including;i) ethyle-propylene rubber; andii) acrylic polymer;an additive, which is selected from the group of a tackifier or a flexibility agent; anda magnetic material, the magnetic material being at least partially formed of a ceramic;wherein between about 7% and about 15% of the ethylene-propylene rubber is greater than about 55% by weight ethylene content and wherein the composition exhibits a peel strength at 90° of greater than 45 grams per millimeter upon attachment to a metal component. 2. A magnetic composition as in claim 1 wherein the polymeric mixture includes a brominated elastomer that is derived from a copolymer of isobutylene and p-methylstyrene. 3. A magnetic composition as in claim 1 wherein the between about 7% and about 15% of the ethylene-propylene rubber is greater than about 70% by weight ethylene content. 4. A magnetic composition as in claim 1 wherein the polymeric mixture includes polyisobutylene and polymethylstyrene. 5. A magnetic composition as in claim 1 wherein the magnetic material is a ferrite. 6. A magnetic composition as in claim 1 further comprising a blowing agent, a blowing agent accelerator and a curing agent. 7. A magnetic composition, comprising:a polymeric mixture, the polymeric mixture including;i) ethylene-propylene rubber;ii) acrylic copolymer;iii) halogenated elastomer;iv) polyisobutylene; andv) polymethylstyrene;tackifying agent, the tackifying agent being a hydrocarbon; anda magnetic material, the magnetic material being at least partially formed of a ceramic and including a ferrite. 8. A magnetic composition as in claim 7 wherein the composition exhibits a peel strength at 90° of greater than 45 grams per millimeter upon attachment to a metal component. 9. A magnetic composition as in claim 7 wherein the halogenated elastomer is a brominated elastomer that is derived from a copolymer of isobutylene an p-methylstyrene. 10. A magnetic composition as in claim 7 wherein between about 7% and about 15% of the ethylene-propylene rubber is greater than about 55% by weight ethylene content. 11. A magnetic composition as in claim 10 wherein the between about 7% and about 15% the ethylene-propylene rubber is greater than about 70% by weight ethylene content. 12. A magnetic composition as in claim 7 further comprising a blowing agent, a blowing agent accelerator and a curing agent. 13. 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; andii) acrylic copolymer;iii) halogenated elastomer;iv) polybutene; andv) a sub-mixture of elastomer and styrenic materiala 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 compositionreinforcement material, the reinforcement material being at least partially formed of polyamide fibers, the reinforcement material present in an amount between about 0.00% and about 3% by weight of the composition; anda 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. 14. A magnetic composition as in claim 1 wherein the additive is a tackifier and the tackifier is hydrocarbon. 15. A magnetic composition as in claim 4 wherein the additive is a tackifier and the tackifier is a hydrocarbon. 16. A magnetic composition as in claim 1 further comprising an anti-corrosion agent. 17. A magnetic composition as in claim 16 wherein the anti-corrosion agent is a coumarone-indene resin. 18. A magnetic composition as in claim 7 further comprising an anti-corrosion agent. 19. A magnetic composition as in claim 18 wherein the anti-corrosion agent is a coumarone-indene resin. 20. A magnetic composition as in claim 1 further comprising a reinforcement material. 21. A magnetic composition as in claim 7 further comprising a reinforcement material. 22. A magnetic composition as in claim 7 further comprising a paraffinic oil. 23. A magnetic composition as in claim 7 further comprising a paraffinic oil.