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US 6,774,171 B2Granted
Magnetic composition
AssigneeL&L Products, Inc.
InventorsAbraham Kassa, Jeffrey R. Apfel
Life of this patent
Estimating the term…
Abstract
A magnetic composition is disclosed. The composition includes a polymeric mixture and a magnetic material.
Claims23
A magnetic composition, comprising:
- a polymeric mixture, the polymeric mixture including;
- i) ethyle-propylene rubber;
- and
- ii) acrylic polymer;
- an additive, which is 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;
- 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.
5 more elements
A magnetic composition, comprising:
- a polymeric mixture, the polymeric mixture including;
- i) ethylene-propylene rubber;
- ii) acrylic copolymer;
- iii) halogenated elastomer;
- iv) polyisobutylene;
- and
- v) polymethylstyrene;
- 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.
7 more elements
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 0.00% 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.
13 more elements
Dependencies are inferred from the claim text.