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Patent US4087405A successfully refreshed from Google Patents.
US4087405A
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Polyhydrazides as stabilizers for polyolefins
Assignee: Eastman Chemical Co
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Filing: 1977-08-26
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Granted: 1978-05-02
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Expires: 1997-08-26
Abstract
Abstract Polyhydrazides of 3,3'-thiodipropionylhydrazide and bis(acid chlorides) are useful as hydrogen peroxide decomposers and copper deactivators for the thermooxidative stabilization of polyolefins.
Inventors
- 👤 Richard H. S. Wang
- 👤 Gether Irick, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:03
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/42; C08K; C08K5/00; C08K5/36; C08K5/37; C08K5/372; C08K5/3725
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
79 words
Polyhydrazide compounds useful as stabilizers in polyolefin compositions having the formulas ##STR20## wherein R is hydrogen or ##STR21## R' is alkyl having 1 to about 20 carbon atoms, benzyl, phenyl, phenyl substituted with alkyl having 1 to about 12 carbon atoms, hydroxy, or alkoxy having 1 to about 8 carbon atoms; n is an integer of 1 to about 10; and X is alkylene having 1 to about 8 carbon atoms, phenylene or phenylene substituted with methyl or hydroxy.
Claim 2
Dependent Claim
79 words
Polyhydrazide compounds useful as stabilizers in polyolefin compositions having the formulas ##STR20## wherein R is hydrogen or ##STR21## R' is alkyl having 1 to about 20 carbon atoms, benzyl, phenyl, phenyl substituted with alkyl having 1 to about 12 carbon atoms, hydroxy, or alkoxy having 1 to about 8 carbon atoms; n is an integer of 1 to about 10; and X is alkylene having 1 to about 8 carbon atoms, phenylene or phenylene substituted with methyl or hydroxy.
Claim 3
Dependent Claim
56 words
Compound of claim 1 wherein R' is methyl, lauryl, stearyl, phenyl, or phenyl substituted with methyl, t-butyl, hydroxyl, methoxy or octoxy, or ethyl substituted with phenyl, or 3,5-di-tert-butyl-4-hydroxyphenyl; X is alkylene of 2 to about 4 carbon atoms, phenylene, or phenylene substituted with methyl or hydroxy; and n is an integer of 1 to about 5.
Claim 4
Dependent Claim
23 words
Compound of claim 2 wherein R' is methyl, phenyl or lauryl, X is phenylene or tetramethylene, and n is an integer of 1-2.
Claim 5
Dependent Claim
28 words
A composition comprising (A) at least one poly-α-olefin; (B) a stabilizing amount of a phenolic primary antioxidant; and (C) a stabilizing amount of a compound of claim 1.
Claim 6
Dependent Claim
14 words
The composition of claim 4 wherein component C is a compound of claim 2.
Claim 7
Dependent Claim
14 words
The composition of claim 5 wherein component C is a compound of claim 3.
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) | 1981-05-01 | 1981-10-31 | 1982-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-01 | 1985-10-31 | 1986-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-01 | 1989-10-31 | 1990-05-02 | $7700.00 | Window Closed / Lapsed |