US3907893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of antioxidant amides
Assignee: Goodyear Tire and Rubber Co
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Filing: 1974-06-28
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Granted: 1975-09-23
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Expires: 1994-06-28
Abstract
Abstract A process for the preparation of antioxidant aromatic amides using carboxylic esters, alkoxide and amide bases, and primary amines as starting materials. Unsaturated products produced using this process are sufficiently pure for use as comonomers in the preparation of elastomers.
Inventors
- 👤 Dane K Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:00
CPC Classifications
C; C08; C08F; C08F236/00; C08F236/02; C08F236/04; C08F236/06; C08K; C08K5/00; C08K5/16; C08K5/20
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
26 words
AN IMPROVED PROCESS FOR THE SYNTHESIS OF AN ANTIOXIDANT AMIDE COMPRISING REACTING A SIMPLE ALIPHATIC OR AROMATIC ESTER, EITHER SATURATED OR UNSATURATED HAVING THE GFORMULA (A)
Claim 2
Dependent Claim
26 words
AN IMPROVED PROCESS FOR THE SYNTHESIS OF AN ANTIOXIDANT AMIDE COMPRISING REACTING A SIMPLE ALIPHATIC OR AROMATIC ESTER, EITHER SATURATED OR UNSATURATED HAVING THE GFORMULA (A)
Claim 3
Dependent Claim
36 words
A process as described in claim 1 above wherein the ester is selected from the group consisting of methyl methacrylate, ethyl laurate, methyl isobutyrate, methyl benzoate, methyl phenyl acetate, ethyl cinnamate, ethyl crotonate and ethyl acetate.
Claim 4
Dependent Claim
32 words
A process as described in claim 2 wherein the primary aromatic amine is selected from the group consisting of p-aminodiphenylamine; N-isopropyl paraphenylene diamine; 2,6-di-t-butyl-4-aminophenol; N-hexyl paraphenylene diamine; 2,6-di-t-hexyl-4-aminophenol and N-cyclohexyl paraphenylene diamine.
Claim 5
Dependent Claim
43 words
A process as described in claim 3 wherein the reaction takes place in the presence of a metal alkoxide selected from the group consisting of sodium methoxide, potassium methoxide, potassium tert.butoxide, lithium methoxide, sodamide, sodium tert.butoxide, sodium ethoxide, sodium hydride and lithium hydride.
Claim 6
Dependent Claim
23 words
A process as described in claim 1 wherein the ester is methyl methacrylate, the amine is p-aminodiphenylamine and the alkoxide is sodium methoxide.
Claim 7
Dependent Claim
21 words
A process as described in claim 1 wherein the organic solvent is selected from the group consisting of benzene and toluene.
References Cited (Backward Citations)
US3538159A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |