US3971757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
3-Alkyl-4-oxo-imidazolidines and their 1-oxyls
Assignee: Novartis Corp
•
Filing: 1974-06-05
•
Granted: 1976-07-27
•
Expires: 1994-06-05
Abstract
Abstract 2,2,5,5-Tetraalkyl- and 2,5-Dispiroalkylene-4-oxoimidazolidines which are substituted in 3-position by mono- to tetravalent radicals, are exellent light-stabilizers for organic polymers. They possess a higher compatibility with organic polymers than the corresponding imidazolines unsubstituted in 3-position, from which they may synthesized by reactions known for N-substitution. The preferred substituents in 3-position are alkyl, alkylene, alkenyl, aralkyl and esteralkyl groups. The 1-nitroxyls derived from the imidazolidines by oxidation with hydrogen peroxide or percarboxylic acids too are good light stabilizers.
Inventors
- 👤 Michael Rasberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:29
CPC Classifications
C; C07; C07D; C07D235/00; C07D235/02; C07D233/00; C07D233/04; C07D233/28; C07D233/30; C07D233/32; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3442; C08K5/3445; C08K5/36; C08K5/37; C08K5/378; C09; C09K; C09K15/00; C09K15/04; C09K15/30
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
89 words
Compounds of the formula ##EQU23## wherein R 1 and R 2 and R 3 and R 4 , together with the carbon atoms to which they are bonded, form cycloalkyl radicals, n is an integer of 1 or 2, and X, if n is 1, is an alkyl group of 8 to 18 carbon atoms, allyl, methallyl, propargyl or benzyl group, and if n is 2, an alkylene group with 2 to 4 carbon atoms or alkylene with 2 to 10 carbon atoms which is interrupted by ester groups.
Claim 2
Dependent Claim
89 words
Compounds of the formula ##EQU23## wherein R 1 and R 2 and R 3 and R 4 , together with the carbon atoms to which they are bonded, form cycloalkyl radicals, n is an integer of 1 or 2, and X, if n is 1, is an alkyl group of 8 to 18 carbon atoms, allyl, methallyl, propargyl or benzyl group, and if n is 2, an alkylene group with 2 to 4 carbon atoms or alkylene with 2 to 10 carbon atoms which is interrupted by ester groups.
Claim 3
Dependent Claim
9 words
A compound of claim 1 wherein n is 1.
Claim 4
Dependent Claim
9 words
A compound of claim 1 wherein n is 2.
Claim 5
Dependent Claim
9 words
The compound of claim 1 which is 14-benzyl-7,14-diaza-15-oxo-dispiro [5.1.5.2]pentadecane.
Claim 6
Dependent Claim
4 words
The compound 14-allyl-7,14-diaza-15-oxo-dispiro [5.1.5.2]pentadecane.
Claim 7
Dependent Claim
4 words
The compound 14-allyl-7,14-diaza-15-oxo-dispiro [5.1.5.2]pentadecane.
Claim 8
Dependent Claim
4 words
The compound 14-octyl-7,14-diaza-15-oxo-dispiro [5.1.5.2]pentadecane.
Claim 9
Dependent Claim
4 words
The compound 14-octyl-7,14-diaza-15-oxo-dispiro [5.1.5.2]pentadecane.
Claim 10
Dependent Claim
4 words
The compound 14-octadecyl-7,14-diaza-15-oxo-dispiro [5.1.5.2]pentadecane.
Claim 11
Dependent Claim
4 words
The compound 14-octadecyl-7,14-diaza-15-oxo-dispiro [5.1.5.2]pentadecane.
Claim 12
Dependent Claim
6 words
The compound 1',4'-bis (7,14-diaza-15-oxo-dispiro [5.1.5.2]pentadecyl-14) butane.
Claim 13
Dependent Claim
6 words
The compound 1',4'-bis (7,14-diaza-15-oxo-dispiro [5.1.5.2]pentadecyl-14) butane.
Claim 14
Dependent Claim
14 words
An organic polymer stabilized with 0.01 to 5% of a compound of claim 1.
Claim 15
Dependent Claim
11 words
A composition of claim 9 wherein the organic polymer is polyolefine.
Claim 16
Dependent Claim
14 words
A composition of claim 9 wherein the organic polymer is a copolymer of butadiene.
Claim 17
Dependent Claim
15 words
A composition of claim 9 wherein the organic polymer is polystyrene or a styrene copolymer.
References Cited (Backward Citations)
US3205195A
Cited
FR3769M
Cited
US3532703A
Cited
US3448074A
Cited
GB1202299A
Cited
US3645965A
Cited
JPS462905B1
Cited
US3769259A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-27 | 1980-01-26 | 1980-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-27 | 1984-01-26 | 1984-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-27 | 1988-01-26 | 1988-07-27 | $7700.00 | Window Closed / Lapsed |