US4782105A
Expired / Lapsed
US
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Long chain N,N,-dialkylhydroxylamines and stabilized compositions
Assignee: BASF Corp
•
Filing: 1987-04-10
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Granted: 1988-11-01
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Expires: 2007-04-10
Abstract
Abstract Long chain N,N-dialkylhydroxylamines represent particularly valuable stabilizers for a number of polymer substrates. Their particular value is seen in their high temperature processing stabilization of poly(arylene sulfide), such as poly(phenylene sulfide), PPS, and of selected unsaturated elastomers used to modify thermoplastics. PPS is processed at elevated temperatures (300° to 425° C.) at which temperatures it crosslinks readily. Process stabilizers can extend the time to crosslinking and hence the processibility of the PPS. Long chain N,N-dialkylhydroxylamines are very effective process stabilizers for PPS being far superior to phenolic antioxidants, phosphites or amines. The hydroxylamine derived from di(hydrogenated tallow)amine is particularly useful for this purpose.
Inventors
- 👤 Ramanathan Ravichandran
- 👤 Ambelal R. Patel
- 👤 Frank P. Cortolano
- 👤 Richard W. Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:16
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/32; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
51 words
A composition stabilized against thermal oxidative degradation, crosslinking, gel formation or chain extension, which comprises (a) a poly(arylene sulfide) resin, and (b) a stabilizing amount of a long chain N,N-dialkylhydroxylamine of the formula E.sub.1 E.sub.2 NOH wherein E 1 and E 2 are independently alkyl of 8 to 36 carbon atoms.
Claim 2
Dependent Claim
51 words
A composition stabilized against thermal oxidative degradation, crosslinking, gel formation or chain extension, which comprises (a) a poly(arylene sulfide) resin, and (b) a stabilizing amount of a long chain N,N-dialkylhydroxylamine of the formula E.sub.1 E.sub.2 NOH wherein E 1 and E 2 are independently alkyl of 8 to 36 carbon atoms.
Claim 3
Dependent Claim
14 words
A composition according to claim 1 where the poly(arylene sulfide) resin is poly(p-phenylene sulfide).
Claim 4
Dependent Claim
24 words
A composition according to claim 1 where in component (b) E 1 and E 2 are independently alkyl of 12 to 18 carbon atoms.
Claim 5
Dependent Claim
22 words
A composition according to claim 1 where in component (b) E 1 and E 2 are independently, tetradecyl, hexadecyl, heptadecyl or octadecyl.
Claim 6
Dependent Claim
24 words
A composition according to claim 1 where in component (b) E 1 and E 2 are the alkyl mixture found in hydrogenated tallow amine.
Claim 7
Dependent Claim
22 words
A composition according to claim 1 where in component (b) E 1 and E 2 are each dodecyl, tetradecyl, hexadecyl or octadecyl.
Claim 8
Dependent Claim
22 words
A composition according to claim 1 where in component (b) E 1 is hexadecyl and E 2 is tetradecyl, heptadecyl or octadecyl.
Claim 9
Dependent Claim
19 words
A composition according to claim 1 where in component (b) E 1 is heptadecyl and E 2 is octadecyl.
Claim 10
Dependent Claim
67 words
A composition stabilized against thermal, oxidative, light or gamma radiation induced degradation, which comprises (a) an ethylenically unsaturated elastomer, and (b) a stabilizing amount of a long chain N,N-dialkylhydroxylamine of the formula E.sub.1 E.sub.2 NOH wherein E 1 and E 2 are independently alkyl of 8 to 36 carbon atoms, with the proviso that component (a) is not a copolymer of acrylonitrile-butadiene or a polymer of 2-chloro-1,3-butadiene.
Claim 11
Dependent Claim
67 words
A composition stabilized against thermal, oxidative, light or gamma radiation induced degradation, which comprises (a) an ethylenically unsaturated elastomer, and (b) a stabilizing amount of a long chain N,N-dialkylhydroxylamine of the formula E.sub.1 E.sub.2 NOH wherein E 1 and E 2 are independently alkyl of 8 to 36 carbon atoms, with the proviso that component (a) is not a copolymer of acrylonitrile-butadiene or a polymer of 2-chloro-1,3-butadiene.
Claim 12
Dependent Claim
28 words
A composition according to claim 9 where the unsaturated elastomer is polybutadiene, polyisoprene, styrene-butadiene copolymer or block copolymer, ethylene-propylene terpolymer, isoprene-isobutylene copolymer, or styrene-isoprene copolymer or block copolymer.
Claim 13
Dependent Claim
22 words
A composition according to claim 10 wherein the elastomer is styrene-butadiene copolymer or block copolymer, styrene-isoprene copolymer or block copolymer or polybutadiene.
Claim 14
Dependent Claim
24 words
A composition according to claim 9 where in component (b) E 1 and E 2 are independently alkyl of 12 to 18 carbon atoms.
Claim 15
Dependent Claim
23 words
A composition according to claim 9 where in component (b) E 1 and E 2 are independently dodecyl, tetradecyl, hexadecyl, heptadecyl or octadecyl.
Claim 16
Dependent Claim
24 words
A composition according to claim 9 where in component (b) E 1 and E 2 are the alkyl mixture found in hydrogenated tallow amine.
Claim 17
Dependent Claim
22 words
A composition according to claim 9 where in component (b) E 1 and E 2 are each dodecyl, tetradecyl, hexadecyl or octadecyl.
Claim 18
Dependent Claim
22 words
A composition according to claim 9 where in component (b) E 1 is hexadecyl and E 2 is tetradecyl, heptadecyl or octadecyl.
Claim 19
Dependent Claim
19 words
A composition according to claim 9 where in component (b) E 1 is heptadecyl and E 2 is octadecyl.
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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) | 1991-11-01 | 1992-05-02 | 1992-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-01 | 1996-05-02 | 1996-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-01 | 2000-05-02 | 2000-11-01 | $7700.00 | Window Closed / Lapsed |