US4145556A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxamide stabilizers for organic materials
Assignee: Uniroyal Chemical Co Inc
•
Filing: 1977-12-21
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Granted: 1979-03-20
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Expires: 1997-12-21
Abstract
Abstract Novel N,N'-bis[(alkylhydroxyphenyl)alkanoyloxyhydrocarbyl]oxamides which can be prepared by reacting an alkylhydroxyphenylalkanoic acid, an ester or anhydride thereof or a corresponding acid halide with an N,N'-bis(hydroxyhydrocarbyl)oxamide, are useful as stabilizers of organic materials normally subject to oxidative deterioration, e.g. polymers such as polyolefins.
Inventors
- 👤 Richard H. Hirsch
- 👤 William H. Selcer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:02
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/20
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
92 words
A compound having the structural formula ##STR4## in which each R 1 independently is alkyl having up to about 8 carbon atoms including a tertiary carbon atom directly linked to the phenolic ring on which that R 1 is a substituent, each R 2 independently is H or alkyl having up to about 8 carbon atoms, and each X independently is a divalent hydrocarbon radical containing up to about 12 carbon atoms including from 1 to about 10 carbon atoms forming the shortest chain linking the adjacent ##STR5## radicals in said compound.
Claim 2
Dependent Claim
92 words
A compound having the structural formula ##STR4## in which each R 1 independently is alkyl having up to about 8 carbon atoms including a tertiary carbon atom directly linked to the phenolic ring on which that R 1 is a substituent, each R 2 independently is H or alkyl having up to about 8 carbon atoms, and each X independently is a divalent hydrocarbon radical containing up to about 12 carbon atoms including from 1 to about 10 carbon atoms forming the shortest chain linking the adjacent ##STR5## radicals in said compound.
Claim 3
Dependent Claim
11 words
A compound of claim 1 wherein X contains no olefinic unsaturation.
Claim 4
Dependent Claim
16 words
A compound of claim 2 wherein said chain contains not more than about 6 carbon atoms.
Claim 5
Dependent Claim
15 words
A compound of claim 2 wherein X contains not more than about 6 carbon atoms.
Claim 6
Dependent Claim
27 words
A compound of claim 4 wherein X is alkylene containing not more than about 1 carbon atom more than the number of carbon atoms in said chain.
Claim 7
Dependent Claim
18 words
A compound of claim 1 wherein X is non-tertiary alkylene containing not more than about 6 carbon atoms.
Claim 8
Dependent Claim
9 words
A compound of claim 6 wherein X is ethylene.
Claim 9
Dependent Claim
9 words
A compound of claim 1 wherein X is phenylene.
Claim 10
Dependent Claim
11 words
A compound of claim 8 wherein X is ortho- or meta-phenylene.
Claim 11
Dependent Claim
35 words
A compound of claim 1 wherein R 1 is tertiary butyl and each R 2 is tertiary butyl ortho to the hydroxy radical on the phenolic ring on which that R 2 is a substituent.
Claim 12
Dependent Claim
11 words
A compound of claim 10 wherein X contains no olefinic unsaturation.
Claim 13
Dependent Claim
15 words
A compound of claim 11 wherein X contains not more than about 6 carbon atoms.
Claim 14
Dependent Claim
20 words
A compound of claim 11 wherein said chain contains at least 2 and not more than about 6 carbon atoms.
Claim 15
Dependent Claim
31 words
A compound of claim 13 wherein X is selected from phenylene and alkylene containing not more than about 1 carbon atom more than the number of carbon atoms in said chain.
Claim 16
Dependent Claim
19 words
A compound of claim 10 wherein X is non-tertiary acyclic alkylene containing not more than about 6 carbon atoms.
Claim 17
Dependent Claim
13 words
A compound of claim 15 wherein X contains 2 or 3 carbon atoms.
Claim 18
Dependent Claim
9 words
A compound of claim 10 wherein X is ethylene.
Claim 19
Dependent Claim
9 words
A compound of claim 10 wherein X is phenylene.
Claim 20
Dependent Claim
9 words
A compound of claim 18 wherein X is meta-phenylene.
Claim 21
Dependent Claim
9 words
A compound of claim 18 wherein X is orthophenylene.
References Cited (Backward Citations)
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US3649667A
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US3925306A
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US3956361A
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US3970637A
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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) | 1982-03-19 | 1982-09-18 | 1983-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-19 | 1986-09-18 | 1987-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-19 | 1990-09-18 | 1991-03-20 | $7700.00 | Window Closed / Lapsed |