US3970636A
Expired / Lapsed
US
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Tetramethylpiperidinylphosphine oxides as light stabilizers for polymers
Assignee: Wyeth Holdings LLC
•
Filing: 1975-04-15
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Granted: 1976-07-20
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Expires: 1995-04-15
Abstract
Abstract Compounds of the formula: ##SPC1## Wherein X is --H, --OH, or --O.; R is --H or --OH; and Q is --C.tbd.N or ##EQU1## where R' is alkyl of 1 to 18 carbon atoms or hydrogen are useful for stabilizing polymers against degradation by ultraviolet radiation.
Inventors
- 👤 William Baptist Hardy
- 👤 Peter Vincent Susi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:04
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/53; C08K5/5397; C07; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/553; C07F9/576; C07F9/59
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
37 words
A compound of the formula: ##SPC5## wherein X is --H, --OH, or --O.sup.. ; R is --H or --OH; and Q is --C.tbd.N or ##EQU4## where R' is alkyl of 1 to 18 carbon atoms or hydrogen.
Claim 2
Dependent Claim
37 words
A compound of the formula: ##SPC5## wherein X is --H, --OH, or --O.sup.. ; R is --H or --OH; and Q is --C.tbd.N or ##EQU4## where R' is alkyl of 1 to 18 carbon atoms or hydrogen.
Claim 3
Dependent Claim
11 words
A compound as defined in claim 1 wherein Q is --C.tbd.N.
Claim 4
Dependent Claim
23 words
A compound as defined in claim 1 wherein Q is ##EQU5## where R' is alkyl of 1 to 18 carbon atoms or hydrogen.
Claim 5
Dependent Claim
11 words
A compound as defined in claim 1 which is (2,2,6,6-tetramethyl-4-hydroxy-4-piperidinyl)bis(2-cyanoethyl)phosphine oxide.
Claim 6
Dependent Claim
11 words
A compound as defined in claim 1 which is (2,2,6,6-tetramethyl-4-hydroxy-1-oxyl-4-piperidinyl)bis(2-cyanoethyl)phosphine oxide.
Claim 7
Dependent Claim
11 words
A compound as defined in claim 1 which is (2,2,6,6-tetramethyl-4-piperidinyl)bis(2-carbethoxyethyl)phosphine oxide.
Claim 8
Dependent Claim
11 words
A compound as defined in claim 1 which is (2,2,6,6-tetramethyl-4-piperidinyl)bis(2-carboctoxyethyl)phosphine oxide.
Claim 9
Dependent Claim
11 words
A compound as defined in claim 1 which is (2,2,6,6-tetramethyl-1,4-dihydroxy-4-piperidinyl)bis(2-cyanoethyl)phosphine oxide.
Claim 10
Dependent Claim
11 words
A compound as defined in claim 1 which is (2,2,6,6-tetramethyl-4-hydroxy-4-piperidinyl)bis(2-carbethoxyethyl)phosphine oxide.
Claim 11
Dependent Claim
11 words
A compound as defined in claim 1 which is (2,2,6,6-tetramethyl-4-hydroxy-4-piperidinyl)bis(2-carboctadecyloxyethyl)phosphine oxide.
Claim 12
Dependent Claim
11 words
A compound as defined in claim 1 which is (2,2,6,6-tetramethyl-4-piperidinyl)bis(2-carboctadecyloxyethyl)phosphine oxide.
Claim 13
Dependent Claim
24 words
A polymer composition containing an amount of a compound as defined in claim 1 effective to stabilize said polymer against degradation by ultraviolet radiation.
Claim 14
Dependent Claim
13 words
A composition as defined in claim 12 wherein said polymer is a polyolefin.
Claim 15
Dependent Claim
12 words
A composition as defined in claim 13 wherein said polyolefin is polypropylene.
Claim 16
Dependent Claim
26 words
A composition as defined in claim 12 wherein said effective amount is about 0.1% to about 5% by weight of said compound on weight of polymer.
Claim 17
Dependent Claim
11 words
A composition as defined in claim 12 wherein Q is --C.tbd.N.
Claim 18
Dependent Claim
23 words
A composition as defined in claim 12 wherein Q is ##EQU6## where R' is alkyl of 1 to 18 carbon atoms or hydrogen.
References Cited (Backward Citations)
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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) | 1979-07-20 | 1980-01-19 | 1980-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-20 | 1984-01-19 | 1984-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-20 | 1988-01-19 | 1988-07-20 | $7700.00 | Window Closed / Lapsed |