US4049713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Esters and amides of trisubstituted hydroxyphenylalkanoic acids
Assignee: Novartis Corp
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Filing: 1976-05-03
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Granted: 1977-09-20
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Expires: 1996-05-03
Abstract
Abstract The compounds are esters and amides of trialkylhydroxyphenylalkanoic acid having the formula ##STR1## wherein R, R 1 and R 2 are independently lower alkyl or cycloalkyl groups, R 3 is hydrogen, alkyl, cycloalkyl, alkylene, phenyl, phenyl substituted by alkyl groups, alkylthioethyl, thiobis-alkylene, alkyleneoxyalkylene, polyoxyalkylene or a polyvalent cyclic or acyclic hydrocarbon radical, R 4 is hydrogen, lower alkyl, cycloalkyl, R 5 is hydrogen, alkyl, phenyl, phenyl substituted with alkyl groups, alkylene, polyoxyalkylene or polyvalent cyclic or acyclic hydrocarbon radical, A is lower alkylene, m is 1 to 4 and n is 1 to 6. The compounds are useful as stabilizers for organic materials, especially polyolefins, which deteriorate upon exposure to light and heat.
Inventors
- 👤 John d. Spivack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:12
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/20
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
92 words
A compound having the formula ##STR37## wherein R is a branched alkyl of 3 to 8 carbon atoms, R 1 and R 2 are alkyl of 1 to 3 carbon atoms, R 4 is hydrogen or alkyl of 1 to 4 carbon atoms, R 5 is, when m is 1, alkyl of 1 to 18 carbon atoms, or when m is 2, alkylene of 2 to 12 carbon atoms or 3,6-dioxa-1,8-octamethylene, A is a straight chain alkylene of 1 to 3 carbon atoms, and m is an integer of 1 to 2.
Claim 2
Dependent Claim
92 words
A compound having the formula ##STR37## wherein R is a branched alkyl of 3 to 8 carbon atoms, R 1 and R 2 are alkyl of 1 to 3 carbon atoms, R 4 is hydrogen or alkyl of 1 to 4 carbon atoms, R 5 is, when m is 1, alkyl of 1 to 18 carbon atoms, or when m is 2, alkylene of 2 to 12 carbon atoms or 3,6-dioxa-1,8-octamethylene, A is a straight chain alkylene of 1 to 3 carbon atoms, and m is an integer of 1 to 2.
Claim 3
Dependent Claim
21 words
Compounds of claim 1 wherein R is a branched chain alkyl and R 1 and R 2 are straight chain alkyl.
Claim 4
Dependent Claim
9 words
Compounds of claim 2 wherein R 4 is hydrogen.
Claim 5
Dependent Claim
16 words
Compounds of claim 3 wherein R is tert-alkyl and R 1 and R 2 are methyl.
Claim 6
Dependent Claim
9 words
Compounds of claim 2 wherein R 4 is methyl.
Claim 7
Dependent Claim
16 words
Compounds of claim 5 wherein R is tert-alkyl and R 1 and R 2 are methyl.
Claim 8
Dependent Claim
9 words
Compounds of claim 2 wherein R 5 is alkyl.
Claim 9
Dependent Claim
16 words
Compounds of claim 7 wherein R is tert-alkyl and R 1 and R 2 are methyl.
Claim 10
Dependent Claim
9 words
Compounds of claim 2 wherein R 5 is alkylene.
Claim 11
Dependent Claim
16 words
Compounds of claim 9 wherein R is tert-alkyl and R 1 and R 2 are methyl.
Claim 12
Dependent Claim
6 words
The compound of claim 1, N-methyl-3-(2,3-dimethyl-5-tert-butyl-4-hydroxyphenyl)propionamide.
Claim 13
Dependent Claim
6 words
The compound of claim 1, N-methyl-N-n-octadecyl-(5-tert-butyl-2,3-dimethyl-4-hydroxyphenyl)acetamide.
Claim 14
Dependent Claim
6 words
The compound of claim 1, N-n-octadecyl-3-(5-tert-butyl-2,3-dimethyl-4-hydroxyphenyl)propionamide.
Claim 15
Dependent Claim
6 words
The compound of claim 1, N,N'-ethylenebis-[3-(5-tert-butyl-2,3-dimethyl-4-hydroxyphenyl)propionamide].
Claim 16
Dependent Claim
6 words
The compound of claim 1, N,N'-hexamethylenebis-[3-(5-tert-butyl-2,3-dimethyl-4-hydroxyphenyl)propionamide].
Claim 17
Dependent Claim
6 words
The compound of claim 1, N,N'-3,6-dioxa-1,8-octamethylenebis-[3-(5-tert-butyl-2,3-dimethyl-4-hydroxyphenyl)propionamide].
Claim 18
Dependent Claim
65 words
A compound according to claim 1 wherein R is tert-butyl, R 1 and R 2 are methyl R 4 is hydrogen or methyl, R 5 is, when m is 1, alkyl of 1 to 18 carbon atoms, or when m is 2, alkylene of 2 to 6 carbon atoms or 3,6-dioxa-1,8-octamethylene, A is methylene or ethylene, and m is an integer of 1 to 2.
Claim 19
Dependent Claim
38 words
A compound according to claim 17 wherein R is tert-butyl, R 1 and R 2 are methyl, R 4 is hydrogen, R 5 is alkylene of 2 to 6 carbon atoms, A is ethylene, and m is 2.
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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) | 1980-09-19 | 1981-03-21 | 1981-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-19 | 1985-03-21 | 1985-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-19 | 1989-03-21 | 1989-09-20 | $7700.00 | Window Closed / Lapsed |