US3839274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyolefins stabilized with thiopropionamides and phenols
Assignee: Goodrich Corp
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Filing: 1973-04-16
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Granted: 1974-10-01
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Expires: 1993-04-16
Abstract
Abstract Highly effective stabilizer systems are obtained when bis- thio propionamides are employed in combination with certain phenols. Especially useful thio propionamides include N,N''-methylene-bis( Beta -(arylthio)propionamides) and N,N''-methylene-bis( Beta (alkylthio)propionamides). The phenolic stabilizers are derived from isocyanurates and 1,3,5-triazines. The combinations are particularly useful for the stabilization of polyethylene and polypropylene.
Inventors
- 👤 W Beears
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:28
CPC Classifications
C; C09; C09K; C09K15/00; C09K15/04; C09K15/30; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3467; C08K5/3477; C08K5/3492; C08K5/34924; C08K5/36; C08K5/37; C08K5/372; C08K5/3725
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
36 words
A COMPOSITION COMPRISING A POLYOLEFIN POLYMER AND FROM ABOUT 0.01 PERCENT TO ABOUT 5 PERCENT BY WEIGHT BASED UPON THE TOTAL WEIGHT OF THE COMPOSITION OF A STABILIZER SYSTEM COMPRISING (A) A BIS-THIOPROPIONAMIDE OF THE FORMULA
Claim 2
Dependent Claim
36 words
A COMPOSITION COMPRISING A POLYOLEFIN POLYMER AND FROM ABOUT 0.01 PERCENT TO ABOUT 5 PERCENT BY WEIGHT BASED UPON THE TOTAL WEIGHT OF THE COMPOSITION OF A STABILIZER SYSTEM COMPRISING (A) A BIS-THIOPROPIONAMIDE OF THE FORMULA
Claim 3
Dependent Claim
33 words
A composition of claim 1 wherein the polyolefin polymer is polyethylene or polypropylene, and the stabilizer system is present in from about 0.1 percent to about 3 percent by weight of the composition.
Claim 4
Dependent Claim
20 words
A composition of claim 2 wherein (b) R'' and R'''' are tertiary alkyl radicals containing four to eight carbon atoms.
Claim 5
Dependent Claim
20 words
A composition of claim 3 wherein (a) R1 is an alkyl radical containing from eight to about 18 carbon atoms.
Claim 6
Dependent Claim
9 words
A composition of claim 4 wherein (b) is tris(3,5-di-t-butyl-4-hydroxybenzyl)isocyanurate.
Claim 7
Dependent Claim
18 words
A composition of claim 5 wherein the weight ratio of (a) to (b) is about 1 to 1.
Claim 8
Dependent Claim
11 words
A composition of claim 6 wherein (a) is N,N''-methylene-bis( Beta -dodecylthio)propionamide.
Claim 9
Dependent Claim
11 words
A composition of claim 6 wherein (a) is N,N''-methylene-bis( Beta -octadecylthio)propionamide.
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) | 1977-09-30 | 1978-04-01 | 1978-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-30 | 1982-04-01 | 1982-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-30 | 1986-04-01 | 1986-10-01 | $7700.00 | Window Closed / Lapsed |