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US4370430A
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Hindered amine light stabilizers for polymers
Assignee: Wyeth Holdings LLC
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Filing: 1981-08-31
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Granted: 1983-01-25
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Expires: 2001-08-31
Abstract
Abstract Oligomers of the formula ##STR1## which contain at least one piperidyl radical per repeating unit are useful as light stabilizers for polymers.
Inventors
- 👤 Joseph A. Hoffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:06
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/43; C08K5/44
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
234 words
An oligomer of the formula (I) ##STR12## wherein X and X 1 are the same or different, and represent hydrogen, C 1 14 C 20 alkyl, or the radical (II) ##STR13## wherein R 1 represents hydrogen, C 2 -C 3 hydroxyalkyl, C 1 -C 8 alkyl, hydroxyl, or oxyl; R 2 represents hydrogen, C 1 -C 8 alkyl, or benzyl; R 3 and R 4 , which may be the same, or different, represent C 1 -C 8 alkyl, benzyl, or phenethyl, or together with the carbon to which they are attached form a C 5 -C 10 cycloalkyl, Z represents C 2 -C 20 alkylene, either straight-chained or branched, wherein the alkylene chain may be interrupted by oxy, thio, or ##STR14## radicals, wherein R 5 represents hydrogen, C 1 -C 20 alkyl, or the radical (II); C 5 -C 10 cycloalkylene ##STR15## C 6 -C 12 arylene, or C 8 -C 16 aralkylene, A is a C 6 -C 12 arylene radical, or a substituted C 6 -C 12 arylene wherein the substitutents, which may be the same, or different, are C 1 -C 8 alkyl, C 1 14 C 8 alkoxy, C 1 -C 8 alkylamino, or di(C 1 -C 8 )alkylamino, n is an integer greater than 1 and less than 5, And, Y represents halo, C 1 -C 8 alkylamino, di(C 1 -C 8 )alkylamino, piperidyl, pyrrolidyl, morpholino, or ##STR16##
Claim 2
Dependent Claim
234 words
An oligomer of the formula (I) ##STR12## wherein X and X 1 are the same or different, and represent hydrogen, C 1 14 C 20 alkyl, or the radical (II) ##STR13## wherein R 1 represents hydrogen, C 2 -C 3 hydroxyalkyl, C 1 -C 8 alkyl, hydroxyl, or oxyl; R 2 represents hydrogen, C 1 -C 8 alkyl, or benzyl; R 3 and R 4 , which may be the same, or different, represent C 1 -C 8 alkyl, benzyl, or phenethyl, or together with the carbon to which they are attached form a C 5 -C 10 cycloalkyl, Z represents C 2 -C 20 alkylene, either straight-chained or branched, wherein the alkylene chain may be interrupted by oxy, thio, or ##STR14## radicals, wherein R 5 represents hydrogen, C 1 -C 20 alkyl, or the radical (II); C 5 -C 10 cycloalkylene ##STR15## C 6 -C 12 arylene, or C 8 -C 16 aralkylene, A is a C 6 -C 12 arylene radical, or a substituted C 6 -C 12 arylene wherein the substitutents, which may be the same, or different, are C 1 -C 8 alkyl, C 1 14 C 8 alkoxy, C 1 -C 8 alkylamino, or di(C 1 -C 8 )alkylamino, n is an integer greater than 1 and less than 5, And, Y represents halo, C 1 -C 8 alkylamino, di(C 1 -C 8 )alkylamino, piperidyl, pyrrolidyl, morpholino, or ##STR16##
Claim 3
Dependent Claim
29 words
wherein X, X 1 , and Z are as previously defined; with the proviso that at least one piperidinyl moiety of formula (II) is present in the repeating unit.
Claim 4
Dependent Claim
29 words
wherein X, X 1 , and Z are as previously defined; with the proviso that at least one piperidinyl moiety of formula (II) is present in the repeating unit.
Claim 5
Dependent Claim
13 words
The oligomer of claim 1 wherein X and X' are the radical (II).
Claim 6
Dependent Claim
11 words
The oligomer of claim 1 wherein X and X' are 2,2,6,6-tetramethyl-4-piperidinyl.
Claim 7
Dependent Claim
15 words
The oligomer of claim 1 or 3 wherein Z is hexamethylene and A is 1,3-phenylene.
Claim 8
Dependent Claim
13 words
The oligomer of claim 1 further reacted with an alkyl or aryl amine.
Claim 9
Dependent Claim
10 words
The oligomer of claim 5 wherein said amine is n-butylamine.
Claim 10
Dependent Claim
30 words
A method for stabilizing a polymer subject to degradation by ultraviolet radiation which comprises incorporating into said polymer an ultraviolet radiation stabilizingly effective amount of an oligomer of claim 1.
Claim 11
Dependent Claim
25 words
The method of claim 7 wherein the oligomer is incorporated in a concentration of from about 0.2 to 2% by weight based on the polymer.
Claim 12
Dependent Claim
11 words
The method of claim 7 wherein the polymer is a polyolefin.
Claim 13
Dependent Claim
10 words
The method of claim 9 wherein the polyolefin is polypropylene.
Claim 14
Dependent Claim
13 words
The method of claim 7 wherein the oligomer is that of claim 2.
Claim 15
Dependent Claim
9 words
The composition produced by the method of claim 7.
Claim 16
Dependent Claim
9 words
The composition produced by the method of claim 11.
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) | 1986-01-24 | 1986-07-26 | 1987-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-24 | 1990-07-26 | 1991-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-24 | 1994-07-26 | 1995-01-25 | $7700.00 | Window Closed / Lapsed |