Claims
- 1. A composition comprising a wave absorbing magnetic core particle wherein said magnetic core particle comprises an oxide of the formula M.sub.2 (+3)M(+2)O.sub.4 wherein M(+3) is Al, Cr or Fe, M(+2) is Fe, Ni, Co, Zn, Ca, Ba, Mg, Ga, Gd, Mn or Cd, in combination with an oxide selected from the group consisting of LiO, CdO, NiO, FeO, ZnO, NaO, KO and mixtures thereof, characterized in that said core is capable of adsorbing or coordinating with a hydrophilic moiety, coating with a first amphipathic organic compound, characterized in that said first amphipathic organic compound contains a hydrophilic moiety and a hydrophobic moiety and the hydrophilic moiety is adsorbed or coordinated with the core and the hydrophobic moiety thereby extends outwardly from the inorganic core and further coated with a second amphipathic organic compound wherein said second amphipathic compound contains hydrophobic and hydrophilic moiety and the hydropholic moiety associates with the outwardly extending hydrophobic moiety of said first amphipathic compound to form said wave absorbing composition.
- 2. The composition of claim 1, wherein the wave absorbing magnetic core particle has a diameter of less than 100 nm.
- 3. The composition of claim 1 wherein the amphipathic organic compound is a fatty acid selected from the group consisting of oleic, linoleic, linolenic, palmitic, myristic and arachidonic acid.
- 4. The composition of claim 1 wherein said second amphipathic organic compound is selected from the group consisting of phospholipids, sterol lipids and glycolipids.
- 5. The composition of claim 4 wherein the phospholipid is selected from the group consisting of phosphatidylcholine, phosphatidic acid, phosphatidylinositol, and phosphatidal ethonalamine.
Parent Case Info
This application is a continuation-in-part of U.S. application Ser. No. 07/958,646 filed Oct. 7, 1992, now U.S. Pat. 5,389,377 which is a continuation-in-part of U.S. application Ser. No. 07/894,260, filed Jun. 8, 1992, pending, which is a continuation-in-part of U.S. application Ser. No. 07/566,169, filed Aug. 10, 1990, now abandoned, which is a continuation-in-part of U.S. application Ser. No. 07/455,071, filed Dec. 22, 1989, now abandoned. Attention is also directed to commonly assigned, application Ser. No. 07/706,478, filed Dec. 13, 1991, and commonly assigned U.S. application Ser. No. 07/071,076, the disclosures of which are incorporated by reference.
US Referenced Citations (13)
Foreign Referenced Citations (1)
Number |
Date |
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0125995 |
Nov 1984 |
EPX |
Continuation in Parts (4)
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Number |
Date |
Country |
Parent |
958646 |
Oct 1992 |
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Parent |
894260 |
Jun 1992 |
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Parent |
566169 |
Aug 1990 |
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Parent |
455071 |
Dec 1989 |
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