US5216052A
Expired / Lapsed
US
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Bisbenzofuran-2-ones
Assignee: BASF Corp
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Filing: 1992-06-24
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Granted: 1993-06-01
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Expires: 2012-06-24
Abstract
Abstract Compounds of formula I ##STR1## wherein R 1 is hydrogen, C 1 -C 8 alkyl, C 5 -C 8 cycloalkyl or C 7 -C 9 phenylalkyl, A 1 and A 4 are phenyl, ##STR2## or phenyl which is substituted by 1 to 3 radicals R 3 , which radicals R 3 are each independently of one another selected from the group consisting of C 1 -C 4 alkyl, C 1 -C 18 alkoxy, C 3 -C 4 alkenyloxy, C 7 -C 9 phenylalkoxy, C 5 -C 8 cycloalkoxy, C 1 -C 18 alkanoyloxy, C 3 -C 18 alkenoyloxy, benzoyloxy, phenoxy and hydroxy, m is 1 or 2, A 2 and A 3 , together with the linking carbon atom, form a C 5 -C 7 cycloalkylidene ring which is unsubstituted or substituted by 1 to 3 C 1 -C 4 alkyl groups, are very suitable for stabilising organic materials against thermal, oxidative or light-induced degradation.
Inventors
- 👤 Peter Nesvadba
- 👤 Carla Attinger-Sorato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:09
CPC Classifications
C; C07; C07D; C07D407/00; C07D407/14; C07D307/00; C07D307/77; C07D307/78; C07D307/82; C07D307/83; C08; C08K; C08K5/00; C08K5/04; C08K5/15; C08K5/151; C08K5/1535
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
143 words
A compound of formula (1) ##STR33## wherein R 1 is hydrogen, C 1 -C 8 alkyl, C 5 -C 8 cycloalkyl or C 7 -C 9 phenylalkyl, A 1 and A 4 are phenyl, ##STR34## or phenyl which is substituted by 1 to 3 radicals R 3 , which radicals R 3 are each independently of one another selected from the group consisting of C 1 -C 4 alkyl, C 1 -C 18 alkoxy, C 3 -C 4 alkenyloxy, C 7 -C 9 phenylalkoxy, C 5 -C 8 cycloalkoxy, C 1 -C 18 alkenoyloxy, C 3 -C 18 alkenoyloxy, benzoyloxy, phenoxy and hydroxy, m is 1 or 2, A 2 and A 3 , together with the linking carbon atom, form a C 5 -C 7 cycloalkylidene ring which is unsubstituted or substituted by 1 to 3 C 1 -C 4 alkyl groups.
Claim 2
Dependent Claim
143 words
A compound of formula (1) ##STR33## wherein R 1 is hydrogen, C 1 -C 8 alkyl, C 5 -C 8 cycloalkyl or C 7 -C 9 phenylalkyl, A 1 and A 4 are phenyl, ##STR34## or phenyl which is substituted by 1 to 3 radicals R 3 , which radicals R 3 are each independently of one another selected from the group consisting of C 1 -C 4 alkyl, C 1 -C 18 alkoxy, C 3 -C 4 alkenyloxy, C 7 -C 9 phenylalkoxy, C 5 -C 8 cycloalkoxy, C 1 -C 18 alkenoyloxy, C 3 -C 18 alkenoyloxy, benzoyloxy, phenoxy and hydroxy, m is 1 or 2, A 2 and A 3 , together with the linking carbon atom, form a C 5 -C 7 cycloalkylidene ring which is unsubstituted or substituted by 1 to 3 C 1 -C 4 alkyl groups.
Claim 3
Dependent Claim
65 words
A compound according to claim 1, wherein R 1 is hydrogen, C 1 -C 8 alkyl or C 5 -C 8 cycloalkyl, A 1 and A 4 are phenyl, A 2 and A 3 together form a group ##STR35## wherein, if n is 1, R 2 is hydrogen or C 1 -C 4 alkyl and, if n is 0 or 2, R 2 is hydrogen.
Claim 4
Dependent Claim
18 words
A compound according to claim 1, wherein R 1 is hydrogen, C 1 -C 4 alkyl or cyclohexyl.
Claim 5
Dependent Claim
22 words
A compound according to claim 1, wherein R 1 is tert-butyl and A 2 and A 3 together are a group ##STR36##
Claim 6
Dependent Claim
62 words
A compound according to claim 1, wherein A 1 and A 4 are phenyl or phenyl which is substituted by 1 to 3 radicals R 3 , which radicals R 3 are each independently of one another selected from the group consisting of C 1 -C 4 alkyl, C 1 -C 18 alkoxy, benzoxy, C 1 -C 18 alkanoyloxy, benzoyloxy and hydroxy.
Claim 7
Dependent Claim
50 words
A compound according to claim 1, wherein A 1 and A 4 are ##STR37## wherein R 4 and R 6 are each independently of the other hydrogen or C 1 -C 4 alkyl, and R 5 is hydroxy, C 1 -C 18 alkoxy, C 1 -C 18 alkanoyloxy or benzoxy.
Claim 8
Dependent Claim
97 words
A compound according to claim 1, wherein R 1 is hydrogen, C 1 -C 4 alkyl or cyclohexyl, A 1 and A 4 are phenyl, ##STR38## wherein R 4 and R 6 are each independently of the other hydrogen or methyl, and R 5 is hydroxy, C 1 -C 18 alkoxy, methyl, C 1 -C 8 alkanoyloxy or benzoxy, A 2 and A 3 , together with the linking carbon atom, form a C 5 -C 7 cycloalkylidene ring, or A 2 and A 3 together are a group ##STR39## wherein R 2 is methyl or tert-butyl.
Claim 9
Dependent Claim
37 words
A composition comprising a) an organic material which is subject to oxidative, thermal or light-induced degradation, and b) at least one compound according to claim 1 which is present in an amount sufficient to inhibit said degradation.
Claim 10
Dependent Claim
13 words
A composition according to claim 8, wherein component a) is a synthetic polymer.
Claim 11
Dependent Claim
23 words
A composition according to claim 8, which contains 5 to 50 000 ppm of component b), based on the weight of component a).
Claim 12
Dependent Claim
12 words
A composition according to claim 8, which additionally comprises an organic phosphite.
Claim 13
Dependent Claim
12 words
A composition according to claim 8, which additionally comprises a phenolic antioxidant.
Claim 14
Dependent Claim
26 words
A process for stabilising an organic material against oxidative, thermal or light-induced degradation, which comprises incorporating therein at least one compound as claimed in claim 1.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1996-05-31 | 1996-11-30 | 1997-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-31 | 2000-11-30 | 2001-06-01 | $3760.00 | Window Closed / Lapsed |
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