US3909491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydroxyphenylalkyleneyl isocyanurate/thiophosphite combinations as stabilizers for organic materials
Assignee: Goodrich Corp
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Filing: 1973-10-15
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Granted: 1975-09-30
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Expires: 1993-10-15
Abstract
Abstract Organic materials subject to thermal and/or oxidative degradation are efficiently stabilized using a combination of a hydroxyphenylalkyleneyl isocyanurate compound and a thiophosphite compound. The stabilized compositions exhibit exceptional stability, better than that achieved using either compound alone or using any known combination of phenolic and phosphorouscontaining stabilizer compounds.
Inventors
- 👤 Jack C Gilles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:59
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3467; C08K5/3477; C08K5/3492; C08K5/34924
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
24 words
As a stabilizer for organic materials subject to oxidative and/or thermal degradation, a combination consisting essentially of (1) a hydroxyphenylalkyleneyl isoCyanurate of the formula
Claim 2
Dependent Claim
24 words
As a stabilizer for organic materials subject to oxidative and/or thermal degradation, a combination consisting essentially of (1) a hydroxyphenylalkyleneyl isoCyanurate of the formula
Claim 3
Dependent Claim
48 words
A combination of claim 1 where in (1) R'''' and R'''''' are equal to R'', r1 is a tertiary alkyl radical containing 4 to about 12 carbon atoms, r2 is an alkyl radical containing 1 to about 12 carbon atoms, r3 and r4 are hydrogen, and m 1.
Claim 4
Dependent Claim
10 words
A combination of claim 2 where (1) has the formula
Claim 5
Dependent Claim
34 words
A combination of claim 3 where in (2), n 0, and R is an alkylene radical of 1 to about 10 carbon atoms or an alkoxyalkyl radical containing 2 to about 10 carbon atoms.
Claim 6
Dependent Claim
11 words
A combination of claim 4 consisting of 1,3,5-tris(3,5-di-t-butyl-4-hydroxybenzyl)isocyanurate and tetrakis(dodecylthio)-1,6-dithiohexylene diphosphite.
Claim 7
Dependent Claim
28 words
A COMPOSITION (A) AN ORANGANIC MATERIAL SUBJECT TO OXIDATIVE AND/OR THERMAL DEGRADATION, AND (B) AS THE ONLY STABILIZER, A COMBINATION OF (1 A HYDROXYPHENYLALKYLENEYL ISOCYANURATE OF THE FORMULA
Claim 8
Dependent Claim
28 words
A COMPOSITION (A) AN ORANGANIC MATERIAL SUBJECT TO OXIDATIVE AND/OR THERMAL DEGRADATION, AND (B) AS THE ONLY STABILIZER, A COMBINATION OF (1 A HYDROXYPHENYLALKYLENEYL ISOCYANURATE OF THE FORMULA
Claim 9
Dependent Claim
58 words
A composition of claim 6 wherein (A) is a poly Alpha -monoolefin polymer, and in (B) (1), R'''' and R'''''' are the same as R'', r1 is a tertiary alkyl radical containing 4 to about 12 carbon atoms, r2 is an alkyl radical containing 1 to about 12 carbon atoms, r3 and r4 are hydrogen, and m 1.
Claim 10
Dependent Claim
43 words
A composition of claim 7 wherein (A) is a poly Alpha -monoolefin homopolymer and in (B) (2), n 0, and R is an alkylene radical of 1 to about 10 carbon atoms or an alkoxyalkyl radical containing 2 to about 10 carbon atoms.
Claim 11
Dependent Claim
9 words
A composition of claim 8 wherein (A) is polypropylene.
Claim 12
Dependent Claim
14 words
A composition of claim 9 wherein B consists of 1,3,5-tris(3, 5-di-t-butyl-4-hydroxybenzyl)isocyanurate and tetrakis(dodecylthio)-1,6-dithiohexylene diphosphite.
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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |