US4045404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hindered phenolic norbornane-2,3-dicarboximides and stabilized compositions
Assignee: Novartis Corp
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Filing: 1975-05-08
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Granted: 1977-08-30
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Expires: 1995-05-08
Abstract
Abstract Compounds having the formula ##STR1## wherein R 1 and R 2 are lower alkyl, R 3 is alkyl, another hindered phenolic norbornane-2,3-dicarboximide group, or a group --(CH 2 )--CO 2 R 4 and m is 0 to 3, n is 1 or 2 and R 4 is alkyl, are good oxidative and thermal stabilizers of synthetic polymers.
Inventors
- 👤 John F. Stephen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:55
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/56; C07D209/58; C07D209/72; C07D209/76; C08; C08K; C08K5/00; C08K5/36; C08K5/37; C08K5/378
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
128 words
A composition of matter comprising an organic material normally subject to oxidative, thermal and/or ultraviolet light degradation and (a) from 0.01 to 5% of a stabilizer having the formula ##STR8## wherein R 1 and R 2 are the same or different (lower) alkyl groups of 1 to 4 carbon atoms, m has a value of 0 to 3, n has a value of 1 and 2, and R 3 is alkyl group of 1 to 18 carbons, a group of the formulae ##STR9## where x has a value of 2 to 18, R 4 is alkyl of 1 to 18 carbons, and p has a value of 1 or 2, b. from 0 to 5% of a UV absorber, and c. from 0 to 5% of a co-stabilizer.
Claim 2
Dependent Claim
128 words
A composition of matter comprising an organic material normally subject to oxidative, thermal and/or ultraviolet light degradation and (a) from 0.01 to 5% of a stabilizer having the formula ##STR8## wherein R 1 and R 2 are the same or different (lower) alkyl groups of 1 to 4 carbon atoms, m has a value of 0 to 3, n has a value of 1 and 2, and R 3 is alkyl group of 1 to 18 carbons, a group of the formulae ##STR9## where x has a value of 2 to 18, R 4 is alkyl of 1 to 18 carbons, and p has a value of 1 or 2, b. from 0 to 5% of a UV absorber, and c. from 0 to 5% of a co-stabilizer.
Claim 3
Dependent Claim
11 words
A composition of claim 1 wherein the organic matter is polyolefin.
Claim 4
Dependent Claim
54 words
A composition of claim 2 wherein R 1 and R 2 are methyl, isopropyl or tert-butyl, n is 1, R 3 is alkyl from 4 to 18 carbons, or a group of formulae II, III or IV where x is 2 to 4 and R 4 is alkyl having from 4 to 18 carbons.
Claim 5
Dependent Claim
10 words
A composition of claim 3 wherein the polyolefin is polypropylene.
Claim 6
Dependent Claim
15 words
A composition of claim 4 containing from 0.01 to 5% of UV absorber 2( 2'-hydroxy-3',5'-di-tert-butylphenyl)-5-chlorobenzotriazole.
Claim 7
Dependent Claim
13 words
A composition of claim 4 containing from 0.01 to 5% of co-stabilizer dilaurylthiodipropionate.
References Cited (Backward Citations)
US3234233A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-29 | 1981-02-28 | 1981-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-29 | 1985-02-28 | 1985-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-29 | 1989-02-28 | 1989-08-30 | $7700.00 | Window Closed / Lapsed |