US3666716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Derivatives of diphenylamine and the phenylnaphthylamines as antioxidants and as synergists with dialkyl 3,3{40 -thiodipropionates
Assignee: Uniroyal Chemical Co Inc
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Filing: 1970-01-12
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Granted: 1972-05-30
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Expires: 1990-01-12
Abstract
Abstract WHERE R1, R9 and R12 are phenyl or p-tolyl groups and the remaining R''s, X and Y may be alkyl or various other substituents, are useful antioxidants for lubricating oils or for various polymeric substrates (e.g. polypropylene) especially in combination with a dialkyl thiodipropionate. Typical antioxidants are 4,4''-bis-(alpha,alpha,p-trimethylbenzyl)diphenylamine made by reacting p,alpha-dimethylstyrene with diphenylamine, and N-(4alpha,alpha-dimethylbenzylphenyl)-1-(alpha,alpha-dimethylbenzyl)2 -naphthylamine made by reacting alpha-methylstyrene with Nphenyl-2-naphthylamine. Derivatives of diphenylamine or phenylnaphthylamine of the types
Inventors
- 👤 Edward L Wheeler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:21
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C08; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/18; C09; C09K; C09K15/00; C09K15/04; C09K15/16; C09K15/18; C10M2207/00; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/34; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/064; C10M2219/00; C10M2219/06; C10M2219/08; C10M2219/082; C10M2219/085; C10N; C10N2010/00; C10N2010/02; C10N2010/04; C10N2010/08; C10N2010/14; C10N2010/16
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
12 words
A composition as in claim 1 further containing a dialkyl 3, 3''-thiodipropionate.
Claim 2
Dependent Claim
14 words
A composition as in claim 1 in which the said alpha-olefin homopolymer is polyethylene.
Claim 3
Dependent Claim
14 words
A composition as in claim 1 in which the said alpha-olefin homopolymer is polypropylene.
Claim 4
Dependent Claim
15 words
A composition as in claim 1 in which the said stabilizing chemical is 4,4''-bis(alpha,alpha, p-trimethylbenzyl)diphenylamine.
References Cited (Backward Citations)
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US2943112A
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US3004916A
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US3072603A
Cited
US3210281A
Cited
US3346496A
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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) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |