Patent US4532279A successfully refreshed from Google Patents.
US4532279A
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Polyalkylpiperidine esters of aliphatic tetracarboxylic acids
Assignee: BASF Corp
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Filing: 1984-01-19
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Granted: 1985-07-30
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Expires: 2004-01-19
Abstract
Abstract Compounds of the formula I ##STR1## wherein n is 0 or 1, R 1 is hydrogen or C 2 -C 4 alkyl, and R 2 , R 3 , R 4 and R 5 are monovalent hydrocarbon radicals, are effective light stabilizers for organic polymers, especially for surface-coating resins.
Inventors
- 👤 Friedrich Karrer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:40
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C08K5/3432; C08K5/3435; C07; C07D; C07D211/00; C07D211/04; C07D211/06; C07D211/36; C07D211/40; C07D211/44; C07D211/46
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
86 words
A compound of the formula I ##STR7## wherein n is 0 or 1, R 1 is hydrogen or C 1 -C 4 alkyl, and R 2 , R 3 , R 4 and R 5 are each independently hydrogen, C 1 -C 17 alkyl, C 2 -C 17 alkenyl, C 5 -C 8 cycloalkyl, C 5 -C 8 cycloalkylalkyl or C 5 -C 8 alkylcycloalkyl, C 6 -C 10 aryl, C 7 -C 16 alkylphenyl, C 7 -C 12 aralkyl or C 8 -C 18 alkylphenylalkyl.
Claim 2
Dependent Claim
86 words
A compound of the formula I ##STR7## wherein n is 0 or 1, R 1 is hydrogen or C 1 -C 4 alkyl, and R 2 , R 3 , R 4 and R 5 are each independently hydrogen, C 1 -C 17 alkyl, C 2 -C 17 alkenyl, C 5 -C 8 cycloalkyl, C 5 -C 8 cycloalkylalkyl or C 5 -C 8 alkylcycloalkyl, C 6 -C 10 aryl, C 7 -C 16 alkylphenyl, C 7 -C 12 aralkyl or C 8 -C 18 alkylphenylalkyl.
Claim 3
Dependent Claim
15 words
A compound according to claim 1 of the formula I, wherein R 1 is hydrogen.
Claim 4
Dependent Claim
37 words
A compound according to claim 1 of the formula I, wherein R 2 , R 3 , R 4 and R 5 are identical and are C 1 -C 5 alkyl or C 2 -C 5 alkenyl.
Claim 5
Dependent Claim
22 words
A compound according to claim 3, wherein R 2 , R 3 , R 4 and R 5 are methyl or vinyl.
Claim 6
Dependent Claim
24 words
An organic polymer which is stabilised against photochemical degradation and which contains 0.1 to 4% by weight of a compound of the formula I.
Claim 7
Dependent Claim
24 words
An organic polymer which is stabilised against photochemical degradation and which contains 0.1 to 4% by weight of a compound of the formula I.
Claim 8
Dependent Claim
19 words
An organic polymer which is stabilised according to claim 5 as binder for lacquers, especially for acid-catalysed stoving lacquers.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-29 | 1989-01-28 | 1989-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-29 | 1993-01-28 | 1993-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-29 | 1997-01-28 | 1997-07-30 | $7700.00 | Window Closed / Lapsed |