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US3940409A
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Alkylidenimino thiadiazole containing mixture
Assignee: Texaco Inc
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Filing: 1974-09-09
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Granted: 1976-02-24
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Expires: 1994-09-09
Abstract
Abstract Thiadiazole derivative mixture containing as a principal component a product characterized by the formula ##EQU1## where R is alkyl of from 2 to 30 carbons prepared by the method consisting of first contacting 2-amino-5-mercapto-1,3,4-thiadiazole with an alkanal of the formula RCHO where R is a heretofore defined and second contacting the resultant reaction mixture with dimethyl sulfoxide. Lubricating oil composition comprising a hydrocarbon oil of lubricating viscosity containing between about 0.01 and 50 wt. % of said thiadiazole derivative mixture.
Inventors
- 👤 James O. Waldbillig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:37
CPC Classifications
C; C07; C07D; C07D285/00; C07D285/01; C07D285/02; C07D285/04; C07D285/12; C07D285/125; C07D285/135; C10; C10M; C10M1/00; C10M1/08; C10M135/00; C10M135/32; C10M135/36; C10M2205/00; C10M2205/02; C10M2205/026; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/06; C10M2215/064; C10M2215/065; C10M2215/066; C10M2215/24; C10M2215/26; C10M2217/00; C10M2217/02; C10M2217/022; C10M2217/023; C10M2217/04; C10M2217/046; C10M2217/06; C10M2219/00; C10M2219/02; C10M2219/022; C10M2219/04; C10M2219/046; C10M2219/08; C10M2219/082; C10M2219/10; C10M2219/102; C10M2219/104; C10M2219/106; C10M2219/108; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10M2225/00; C10M2225/02; C10M2229/00; C10M2229/04; C10M2229/041; C10N; C10N2010/00; C10N2010/04; C10N2020/00; C10N2020/01; C10N2040/00; C10N2040/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
146 words
A thiadiazole derivative mixture containing as a principal product an alkylidenimino thiadiazole characterized by the formula: ##EQU13## where R is alkyl of from 2 to 30 carbons, said mixture prepared by the process consisting essentially of first contacting 2-amino-5-mercapto-1,3,4-thiadiazole with an alkanal of the formula RCHO where R is alkyl of from 2 to 30 carbons at a temperature of between about 20 and 250° C. tuilizing a mole ratio of 2-amino-5-mercapto-1,3,4-thiadiazole to alkanal of between about 10:1 and 1:2 to form an intermediate thiadiazole product characterized by the formula: ##EQU14## and second contacting said thiadiazole intermediate with dimethyl sulfoxide at a temperatue of between about 20 and 150° C. utilizing a mole ratio of said intermediate to said dimethyl sulfoxide of between about 3:1 and 1:50 to form said thiadiazole derivative mixture, said first and second contacting conducted in the presence of a liquid solvent.
Claim 2
Dependent Claim
146 words
A thiadiazole derivative mixture containing as a principal product an alkylidenimino thiadiazole characterized by the formula: ##EQU13## where R is alkyl of from 2 to 30 carbons, said mixture prepared by the process consisting essentially of first contacting 2-amino-5-mercapto-1,3,4-thiadiazole with an alkanal of the formula RCHO where R is alkyl of from 2 to 30 carbons at a temperature of between about 20 and 250° C. tuilizing a mole ratio of 2-amino-5-mercapto-1,3,4-thiadiazole to alkanal of between about 10:1 and 1:2 to form an intermediate thiadiazole product characterized by the formula: ##EQU14## and second contacting said thiadiazole intermediate with dimethyl sulfoxide at a temperatue of between about 20 and 150° C. utilizing a mole ratio of said intermediate to said dimethyl sulfoxide of between about 3:1 and 1:50 to form said thiadiazole derivative mixture, said first and second contacting conducted in the presence of a liquid solvent.
Claim 3
Dependent Claim
16 words
A mixture in accordance with claim 1 wherein R is undecyl and said alkanal is lauraldehyde.
References Cited (Backward Citations)
US2898342A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-02-23 | 1979-08-25 | 1980-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-23 | 1983-08-25 | 1984-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-23 | 1987-08-25 | 1988-02-24 | $7700.00 | Window Closed / Lapsed |