USRE30385E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light and heat stabilizers for polyolefins
Assignee: Wyeth Holdings LLC
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Filing: 1979-07-16
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Granted: 1980-08-26
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Expires: 1999-07-16
Abstract
Abstract Compounds of the formula: ##STR1## wherein R is hydrogen or alkyl (C 1 -C 8 ), R' is hydrogen, hydroxyl or lower alkoxy (C 1 -C 8 ); R" is alkyl (C 1 -C 20 ), alkylene (C 2 -C 12 ), cycloalkyl, wherein the alicyclic ring contains 5- or 6-carbon atoms, cycloalkylene, wherein the alicyclic ring may contain lower alkyl substituents, alkenyl (C 3 -C 20 ), arylene or aralkylene; n is an integer from 1 to 4, are useful for stabilizing polyolefin polymer against photo and thermal degradation.
Inventors
- 👤 Ray L. Hillard
- 👤 William B. Hardy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:30
CPC Classifications
C; C07; C07D; C07D211/00; C07D211/04; C07D211/06; C07D211/36; C07D211/60; C07D211/62; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C08K5/3432; C08K5/3435
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
53 words
A compound represented by the formula: ##STR10## wherein R is hydrogen or alkyl (C 1 -C 8 ), R' is hydrogen, or lower alkoxy (C 1 -C 8 ); R" is alkylene (C 2 -C 12 ), cycloalkylene, wherein the alicyclic ring may contain lower alkyl substituents, arylene or aralkylene, n is 2.
Claim 2
Dependent Claim
53 words
A compound represented by the formula: ##STR10## wherein R is hydrogen or alkyl (C 1 -C 8 ), R' is hydrogen, or lower alkoxy (C 1 -C 8 ); R" is alkylene (C 2 -C 12 ), cycloalkylene, wherein the alicyclic ring may contain lower alkyl substituents, arylene or aralkylene, n is 2.
Claim 3
Dependent Claim
11 words
A compound as defined in claim 1 wherein R' is hydrogen.
Claim 4
Dependent Claim
17 words
A compound as defined in claim 1 wherein R' is lower (C 1 -C 8 ) alkoxy.
Claim 5
Dependent Claim
22 words
A synthetic polyolefin polymer composition stabilized against photo- and thermal degradation comprising an effective stabilizing amount of a compound of claim 1.
Claim 6
Dependent Claim
12 words
A composition as defined in claim 4 wherein said polyolefin is polypropylene.
Claim 7
Dependent Claim
22 words
A composition as defined in claim 4 wherein said compound is incorporated in an amount of about 0.01 to 5% by weight.
Claim 8
Dependent Claim
22 words
A composition as defined in claim 5 wherein said compound is incorporated in an amount of about 0.01 to 2% by weight.
Claim 9
Dependent Claim
11 words
A compound as defined in claim 1 wherein R is hydrogen.
Claim 10
Dependent Claim
49 words
A compound as defined in claim 1 wherein R" is alkylene (C 2 -C 12 ). .Iadd.10. A compound represented by the formula ##STR11##.Iaddend. wherein R is hydrogen or alkyl (C 1 -C 8 ), R' is hydrogen or lower alkoxy (C 1 -C 8 ); R" is ##STR12##
Claim 11
Dependent Claim
42 words
and n is 2. .Iadd.11. A compound represented by the formula ##STR13## wherein R is hydrogen or alkyl (C 1 -C 8 ) R' is hydrogen or lower alkoxy (C 1 -C 8 ); R" is ##STR14## and n is 2. .Iaddend.
Claim 12
Dependent Claim
42 words
and n is 2. .Iadd.11. A compound represented by the formula ##STR13## wherein R is hydrogen or alkyl (C 1 -C 8 ) R' is hydrogen or lower alkoxy (C 1 -C 8 ); R" is ##STR14## and n is 2. .Iaddend.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-08-26 | 1984-02-25 | 1984-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-26 | 1988-02-25 | 1988-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-26 | 1992-02-25 | 1992-08-26 | $7700.00 | Window Closed / Lapsed |