Patent US4416346A successfully refreshed from Google Patents.
Patent US4532058A successfully refreshed from Google Patents.
US4532058A
Expired / Lapsed
US
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Spirolactone condensation product dispersants and lubricants containing same
Assignee: Texaco Inc
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Filing: 1982-02-04
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Granted: 1985-07-30
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Expires: 2002-02-04
Abstract
Abstract Motor oil dispersants are disclosed which are made by heating alkenyl succinic anhydrides in the presence of bases and heating the resulting products with a polyamine H 2 N(RNH) n H or a polyamine alcohol HO(RNH) n H. Also disclosed are motor oils containing from 0.10 to 10.00 weight percent of at least one such dispersant.
Inventors
- 👤 Harry Chafetz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:38
CPC Classifications
C; C07; C07D; C07D493/00; C07D493/02; C07D493/10; C10; C10M; C10M133/00; C10M133/52; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10M2215/08; C10M2215/082; C10M2215/086; C10M2215/24; C10M2215/26; C10M2215/28; C10M2217/00; C10M2217/04; C10M2217/046; C10M2217/06; C10N; C10N2040/00; C10N2040/25; C10N2040/251; C10N2040/255; C10N2040/28
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
179 words
Dispersant additives for motor oils comprising products prepared by the process which comprises, intermolecularly decarboxylating and cyclizing by heating to about 180° C. to about 270° C., under a substantially inert atmosphere, an alkenylsuccinic anhydride of the formula: ##STR7## wherein R' is an alkenyl radical having from about 64 to 1500 aliphatic carbon atoms and having a molecular weight in the range of about 1000 to about 22,000 in the presence of about 0.1 to 10 mole percent thereof of a basic catalyst to form bicyclic spirodilactone condensation products represented by the formula: ##STR8## wherein R' is as above; and the spirolactone function is substantially in the center of the molecules and, heating said products to about 75° to 200° C. with a polyamine or polyamine alcohol of the formulas: H.sub.2 N(RNH).sub.n H and HO(RNH).sub.n H wherein R is a divalent alkenyl group having from about 2 to 6 carbon atoms and n ranges from 1 to 6, using a ratio of said polyamino or polyamine or polyamino alcohol to said condensation products of about 60:1 to about 0.5:1.
Claim 2
Dependent Claim
179 words
Dispersant additives for motor oils comprising products prepared by the process which comprises, intermolecularly decarboxylating and cyclizing by heating to about 180° C. to about 270° C., under a substantially inert atmosphere, an alkenylsuccinic anhydride of the formula: ##STR7## wherein R' is an alkenyl radical having from about 64 to 1500 aliphatic carbon atoms and having a molecular weight in the range of about 1000 to about 22,000 in the presence of about 0.1 to 10 mole percent thereof of a basic catalyst to form bicyclic spirodilactone condensation products represented by the formula: ##STR8## wherein R' is as above; and the spirolactone function is substantially in the center of the molecules and, heating said products to about 75° to 200° C. with a polyamine or polyamine alcohol of the formulas: H.sub.2 N(RNH).sub.n H and HO(RNH).sub.n H wherein R is a divalent alkenyl group having from about 2 to 6 carbon atoms and n ranges from 1 to 6, using a ratio of said polyamino or polyamine or polyamino alcohol to said condensation products of about 60:1 to about 0.5:1.
Claim 3
Dependent Claim
15 words
Additives according to claim 1, wherein said catalyst consists of potassium fluoride or potassium carbonate.
Claim 4
Dependent Claim
17 words
Additives according to claim 1 wherein said heating is effected under a nitrogen or carbon dioxide atmosphere.
Claim 5
Dependent Claim
19 words
Additives according to claim 1 wherein said anhydride has an average molecular weight of about 1,400 to about 3,000.
Claim 6
Dependent Claim
26 words
Additives according to claim 1 wherein there is used a ratio of polyamine or polyamino alcohol to condensation products ranging from about 12:1 to about 2:1.
Claim 7
Dependent Claim
18 words
Additives according to claim 1 wherein there is used from about 2 to 7 mole percent of catalyst.
Claim 8
Dependent Claim
11 words
Additives according to claim 1 wherein said amine is triethylene tetramine.
Claim 9
Dependent Claim
32 words
A motor oil containing a major amount of an oil of lubricating viscosity and a minor, effective sludge dispersant, amount of at least one additive as defined by claims 1, or 2.
Claim 10
Dependent Claim
18 words
The motor oil of claim 8, containing from 0.10 to 10.00 weight percent, basis oil, of said additive.
Claim 11
Dependent Claim
180 words
A process for preparing a sludge dispersant for motor oils comprising the steps of: intermolecularly decarboxylating and cyclizing by heating to about 180° C. to about 270° C. under a substantially inert atmosphere an alkenylsuccinic anhydride of the formula: ##STR9## wherein R' is an alkenyl radical having from about 64 to 1500 aliphatic carbon atoms and having a molecular weight in the range of about 1000 to about 22,000; in the presence of about 0.1 to 10 mole percent thereof of a basic catalyst; to form bicyclic spirodilactone condensation products represented by the formula: ##STR10## wherein R' is as above; and the spirolactone function is substantially in the center of the molecules; and, heating said products is about 75° to 200° C. with a polyamine or polyamine alcohol of the formulas: H.sub.2 N(RNH).sub.n H and HO(RNH).sub.n H wherein R is a divalent alkenyl group having from about 2 to 6 carbon atoms and n ranges from 1 to 6, using a ratio of said polyamino or polyamine or polyamino alcohol to said condensation products of about 60:1 to about 0.5:1.
Claim 12
Dependent Claim
180 words
A process for preparing a sludge dispersant for motor oils comprising the steps of: intermolecularly decarboxylating and cyclizing by heating to about 180° C. to about 270° C. under a substantially inert atmosphere an alkenylsuccinic anhydride of the formula: ##STR9## wherein R' is an alkenyl radical having from about 64 to 1500 aliphatic carbon atoms and having a molecular weight in the range of about 1000 to about 22,000; in the presence of about 0.1 to 10 mole percent thereof of a basic catalyst; to form bicyclic spirodilactone condensation products represented by the formula: ##STR10## wherein R' is as above; and the spirolactone function is substantially in the center of the molecules; and, heating said products is about 75° to 200° C. with a polyamine or polyamine alcohol of the formulas: H.sub.2 N(RNH).sub.n H and HO(RNH).sub.n H wherein R is a divalent alkenyl group having from about 2 to 6 carbon atoms and n ranges from 1 to 6, using a ratio of said polyamino or polyamine or polyamino alcohol to said condensation products of about 60:1 to about 0.5:1.
Claim 13
Dependent Claim
38 words
The process of claim 10, wherein there are used a ratio of polyamine or polyamino alcohol to said condensation products of about 12:1 to about 2:1 and from about 2 to about 7 mole percents of said catalyst.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-29 | 1989-01-28 | 1989-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-29 | 1993-01-28 | 1993-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-29 | 1997-01-28 | 1997-07-30 | $7700.00 | Window Closed / Lapsed |