Claims
- 1. A fiber optic cable grease comprising a diamondoid component containing at least about 10 different diamondoid compounds selected from the group consisting of methyl-substituted and ethyl-substituted adamantane, diamantane, triamantane, and higher homologs, wherein each of said selected diamondiod compounds comprises no more than about 10 weight percent of said diamondoid component; and a second component comprising a thickener selected from the group consisting of colloidal silica, fatty acid soaps, clays, and bentonites which is substantially inert to a fiber optic cable sheath.
- 2. The grease composition of claim 1, further comprising at least about 70 weight percent of said diamondoid component, wherein said diamondoid component comprises at least about 65 weight percent alkyl-substituted diamondoid compounds; and a thickener component.
- 3. The grease composition of claim 2 wherein said diamondoid component further comprises at least about 65 weight percent of diamondoid compounds which have more than one quaternary carbon atom per molecule and less than about 35 weight percent of diamondoid compounds which have less than two quaternary carbon atoms per molecule.
- 4. The grease composition of claim 2 wherein said diamondoid component further comprises diamondoid compounds having at least one unsubstituted bridgehead hydrogen which diamondoid compounds have been seletively alkylated with at least one C.sub.6 +.alpha.-olefin in the presence of an acidic catalyst selected from the group consisting of AlX.sub.3 and BX.sub.3 wherein X is a halogen, and in the absence of an added active proton-containing additive.
- 5. The grease composition of claim 2 wherein said diamondoid component further comprises alkyl-substituted adamantanes wherein the ratio of linear to branched alkyl substituents is at least about 1:1, and wherein the average number of alkyl substitutions per diamondoid molecule is from about 1.5 to about 4.
- 6. The grease composition of claim 5 wherein said diamondoid component further comprises alkyl-substituted adamantanes wherein the ratio of linear to branched alkyl substituents is at least about 1:4.
- 7. The grease composition of claim 1 wherein said thickener is a colloidal silica.
- 8. The grease composition of claim 7 wherein said colloidal silica is a hydrophobic fumed silica.
Parent Case Info
This is a division of application Ser. No. 08/136,839, filed on Oct. 18, 1993, now U.S. Pat. No. 5,400,423.
US Referenced Citations (6)
Divisions (1)
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Number |
Date |
Country |
Parent |
136839 |
Oct 1993 |
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