Patent US4501837A successfully refreshed from Google Patents.
US4501837A
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Piperidine derivatives which are stabilisers for synthetic polymers
Assignee: Novartis Corp
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Filing: 1982-08-31
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Granted: 1985-02-26
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Expires: 2002-08-31
Abstract
Abstract The invention relates to new piperidine compounds which act as light stabilisers, heat stabilisers and oxidation stabilisers for synthetic polymers, in particular for hydrocarbon polymers. The compounds are piperidinol carbamates of the formula: ##STR1## in which R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 and A have the meanings defined in the description and y is an integer from 1 to 4. In particular, A represents a monovalent to tetravalent radical, always bonded to the carboxy-piperidine radicals via nitrogen atoms.
Inventors
- 👤 Giuseppe Cantatore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:26
CPC Classifications
C; C07; C07D; C07D211/00; C07D211/04; C07D211/06; C07D211/36; C07D211/56; C07D211/58; C07D211/40; C07D211/44; C07D211/46; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C08K5/3432; C08K5/3435
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
286 words
A compound of the formula ##STR35## or an acid addition salt thereof, in which R 1 represents (a) hydrogen, (b) C 1 -C 12 --alkyl, (c) --CH 2 CN (d) C 3 -C 12 --alkenyl, (e) C 3 -C 12 --alkinyl, (f) benzyl, (g) benzyl substituted by 1 to 3 C 1 -C 4 --alkyl radicals, (h) hydroxybenzyl, (i) hydroxybenzyl substituted by 1 to 3 C 1 -C 4 --alkyl radicals (j) a --COR 8 , --COOR 8 , --Ch 2 COOR 8 or --CONR 8 R 9 radical in which R 8 and R 9 , which may be identical or different, represent (1) linear or branched C 1 -C 12 --alkyl, (2) C 3 -C 12 --alkenyl, (3) C 5 -C 12 --cycloalkyl, (4) phenyl, (5) phenyl substituted by 1 to 3 C 1 -C 8 --alkyl radicals, (6) hydroxyphenyl, (7) hydroxyphenyl substituted by 1 to 3 C 1 -C 8 --alkyl radicals, (8) C 7 -C 12 --aralkyl, or (9) 2,2,6,6-tetramethyl-piperidin-4-yl, (k) a ##STR36## radical, in which R 10 is hydrogen, methyl or phenyl and R 11 is hydrogen, --R 8 , --COR 8 or --CONR 8 R 9 , in which R 8 and R 9 are as defined above, or (l) a ##STR37## radical; and A is a radical of the formula ##STR38## in which R 14 and R 15 , which may be identical or different, are C 5 -C 12 cycloalkyl or a radical of the formula ##STR39## in which R 1 is as defined above, and R 16 is C 1 -C 20 alkylene, C 6 -C 12 arylene or C 7 -C 12 aralkylene; or A is a bivalent radical selected from the group consisting of ##STR40##
Claim 2
Dependent Claim
286 words
A compound of the formula ##STR35## or an acid addition salt thereof, in which R 1 represents (a) hydrogen, (b) C 1 -C 12 --alkyl, (c) --CH 2 CN (d) C 3 -C 12 --alkenyl, (e) C 3 -C 12 --alkinyl, (f) benzyl, (g) benzyl substituted by 1 to 3 C 1 -C 4 --alkyl radicals, (h) hydroxybenzyl, (i) hydroxybenzyl substituted by 1 to 3 C 1 -C 4 --alkyl radicals (j) a --COR 8 , --COOR 8 , --Ch 2 COOR 8 or --CONR 8 R 9 radical in which R 8 and R 9 , which may be identical or different, represent (1) linear or branched C 1 -C 12 --alkyl, (2) C 3 -C 12 --alkenyl, (3) C 5 -C 12 --cycloalkyl, (4) phenyl, (5) phenyl substituted by 1 to 3 C 1 -C 8 --alkyl radicals, (6) hydroxyphenyl, (7) hydroxyphenyl substituted by 1 to 3 C 1 -C 8 --alkyl radicals, (8) C 7 -C 12 --aralkyl, or (9) 2,2,6,6-tetramethyl-piperidin-4-yl, (k) a ##STR36## radical, in which R 10 is hydrogen, methyl or phenyl and R 11 is hydrogen, --R 8 , --COR 8 or --CONR 8 R 9 , in which R 8 and R 9 are as defined above, or (l) a ##STR37## radical; and A is a radical of the formula ##STR38## in which R 14 and R 15 , which may be identical or different, are C 5 -C 12 cycloalkyl or a radical of the formula ##STR39## in which R 1 is as defined above, and R 16 is C 1 -C 20 alkylene, C 6 -C 12 arylene or C 7 -C 12 aralkylene; or A is a bivalent radical selected from the group consisting of ##STR40##
Claim 3
Dependent Claim
69 words
A compound according to claim 1, in which R 1 represents hydrogen, C 1 -C 6 alkyl, C 3 -C 6 -alkenyl, benzyl or C 1 -C 6 alkanoyl, and A is a member of the group consisting of (a) ##STR41## wherein R 14 and R 15 represent C 6 -C 12 cycloalkyl, 2,2,6,6-tetramethylpiperidin -4-yl or 1,2,2,6,6-pentamethylpiperidin-4-yl and R 16 is C 1 -C 6 -alkylene and (b) piperazin-1,4-diyl.
Claim 4
Dependent Claim
40 words
A compound according to claim 1, in which R 1 is hydrogen, methyl, allyl, benzyl or acetyl; A is ##STR42## wherein R 14 and R 15 are cyclohexyl, 2,2,6,6-tetramethylpiperidin-4-yl or 1,2,2,6,6-pentamethylpiperidin-4-yl and R 16 is C 2 -C 6 -alkylene.
Claim 5
Dependent Claim
12 words
A compound according to claim 1, of one of the formulae: ##STR43##
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1988-02-26 | 1988-08-27 | 1989-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-26 | 1992-08-27 | 1993-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-26 | 1996-08-27 | 1997-02-26 | $7700.00 | Window Closed / Lapsed |