Claims
- 1. A borated lubricating oil dispersant additive useful in oleaginous compositions which comprises a product obtained by .treating with a boron compound a condensation product obtained by the reaction of:
- (a) at least one alkyl-substituted hydroxyaromatic compound formed by the alkylation of at least one hydroxy aromatic compound with at least one terminally unsaturated ethylene alpha-olefin polymer of 300 to 20,000 number average molecular weight, at least 30% of said polymer's chains contain terminal ethenylidene unsaturation;
- (b) at least one aldehyde reaction; and
- (c) at least one nucleophilic reactant.
- 2. The borated dispersant additive of claim 1 wherein said polymer comprises an ethylene-propylene copolymer.
- 3. The borated dispersant additive of claim 1 wherein said copolymer has a number average molecular weight of from about 700 to about 15,000.
- 4. The borated dispersant additive of claim 3 wherein said number average molecular weight is between about 1,500 and 5,000.
- 5. The borated dispersant additive of claim 1 wherein said polymer has a molar ethylene content of between about 20 and about 80 percent.
- 6. The borated dispersant additive of claim 2 wherein said polymer has a molar ethylene content of between about 45 and about 65 percent.
- 7. The borated dispersant additive of claim 1 wherein said alpha-olefin comprises butene-1.
- 8. The borated dispersant additive of claim 2 wherein said number average molecular weight is between about 1,500 and 5,000.
- 9. The borated dispersant additive according to claim 1 wherein the nucleophilic reagent comprises an amine containing from 2 to 60 carbon atoms and from 1 to 12 nitrogen atoms per molecule.
- 10. The borated dispersant additive according to claim 9 wherein said amine comprises a polyalkylenepolyamine wherein said alkaline group contains 2 to 60 carbons and said polyalkylenepolyamine contains from 2 to about 9 nitrogen atoms per molecule.
- 11. The borated dispersant additive according to claim 10 wherein said amine comprises polyethylenepolyamine.
- 12. The borated dispersant additive according to claim 1 wherein said dispersant additive contains from about 0.05 to 2.0 weight percent boron.
- 13. The borated dispersant additive of claim 12 wherein said polymer comprises a member selected from the group consisting of ethylene-butene-1 copolymer and an ethylene-propylene copolymer.
- 14. A lubricating oil composition containing from about 0.1 to 20 weight percent of the dispersant adduct of claim 12.
- 15. A process for producing a low sediment borated lubricating oil dispersant material which comprises contacting (A) at least one alkyl-substituted hydroxyaromatic compound formed by the alkylation of at least one hydroxy aromatic compound with at least one ethylene alpha-olefin polymer of 300 to 20,000 number average molecular weight, wherein at least 30% of said polymer's chains contain terminal ethenylidene unsaturation, (B) at least one aldehyde reactant; and (C) at least one nucleophilic reactant, under condensation conditions to form a condensation product; and treating the condensation product with a boron compound to provide the borated dispersant material.
- 16. The process according to claim 15, wherein said borated dispersant material contains from about 0.05 to 2.0 weight percent boron.
- 17. The process of claim 16 wherein said polymer comprises an ethylene-propylene copolymer.
- 18. The process of claim 16 wherein said alpha-olefin comprises butene-1.
- 19. The process of claim 18 or claim 17 wherein said copolymer has a number average molecular weight of from about 700 to about 15,000.
Parent Case Info
This is a division of application Ser. No. 959,021, filed Oct. 9, 1992 is a Rule 60 Continuation of U.S. patent application Ser. No. 788,907 filed Nov. 7, 1991 now abandoned which is a Rule 60 Divisional of U.S. patent Ser. No. 473,625 filed Feb. 1, 1990, U.S. Pat. No. 5,209,103 which is a continuation-in-part of U.S. patent application Ser. No. 226,604 filed Aug. 1, 1988, U.S. Pat. No. 5,017,299.
US Referenced Citations (16)
Foreign Referenced Citations (1)
Number |
Date |
Country |
0128046 |
May 1984 |
EPX |
Divisions (2)
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Number |
Date |
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Parent |
959021 |
Oct 1992 |
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Parent |
473625 |
Feb 1990 |
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Continuations (1)
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Number |
Date |
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Parent |
788907 |
Nov 1991 |
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Continuation in Parts (1)
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Number |
Date |
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Parent |
226604 |
Aug 1988 |
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