US4148747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antioxidant comprising a hydroxy aromatic compound containing sulfur and an organic phosphonate
Assignee: Raychem Corp
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Filing: 1974-10-10
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Granted: 1979-04-10
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Expires: 1994-10-10
Abstract
Abstract An improved antioxidant composition, especially suitable for irradiated or fire-retardant plastics, comprising a mixture of a hydroxy aromatic compound containing sulfur and organic phosphonate compounds.
Inventors
- 👤 Bernard J. Lyons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:17
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/37; C08K5/375
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
122 words
An antioxidant composition suitable for use with polymers subject to oxidative degradation, comprising a mixture of a non-metallic hydroxy aromatic compound having at least one sulfur atom attached to an aromatic carbocyclic ring and an organic phosphonate compound having the general formula ##STR4## wherein any two or all three of R, R', and R" may be the same or different and may contain further phosphonic moieties and wherein R is independently selected from the group consisting of substituted and unsubstituted alkyl, alkenyl, aryl, aralkyl, alkylaryl and triazine and wherein R' and R" are independently selected from the group consisting of, substituted and unsubstituted alkyl, alkenyl, aryl, alkylaryl, aralkyl and triazine wherein R' and R" can be linked together to form a ring.
Claim 2
Dependent Claim
122 words
An antioxidant composition suitable for use with polymers subject to oxidative degradation, comprising a mixture of a non-metallic hydroxy aromatic compound having at least one sulfur atom attached to an aromatic carbocyclic ring and an organic phosphonate compound having the general formula ##STR4## wherein any two or all three of R, R', and R" may be the same or different and may contain further phosphonic moieties and wherein R is independently selected from the group consisting of substituted and unsubstituted alkyl, alkenyl, aryl, aralkyl, alkylaryl and triazine and wherein R' and R" are independently selected from the group consisting of, substituted and unsubstituted alkyl, alkenyl, aryl, alkylaryl, aralkyl and triazine wherein R' and R" can be linked together to form a ring.
Claim 3
Dependent Claim
44 words
The composition of claim 1 wherein the sulfur atom containing hydroxy aromatic compound is a compound of the general formula R 1 --S--R 2 wherein R 1 and R 2 are independently selected from the group consisting of substituted and unsubstituted phenols and naphthols.
Claim 4
Dependent Claim
12 words
The composition of claim 1 wherein the hydroxy aromatic compound is 4,4'-thiobis(6-t-butyl-m-cresol).
Claim 5
Dependent Claim
17 words
The composition of claim 1 wherein the hydroxy aromatic compound is a mixture of oligomers of 4,4'-thiobis(6-t-butyl-m-cresol).
Claim 6
Dependent Claim
12 words
The composition of claim 1 wherein the hydroxy aromatic compound is 4,4'-thiobis(6-t-butyl-o-cresol).
Claim 7
Dependent Claim
12 words
The composition of claim 1 wherein the hydroxy aromatic compound is 1,1'-thiobis(2-naphthol).
Claim 8
Dependent Claim
13 words
The composition of claim 1 wherein the hydroxy aromatic compound is 2,2'-thiobis(4-methyl-6-t-butyl phenol).
Claim 9
Dependent Claim
19 words
The composition of claim 1 wherein the hydroxy aromatic compound is the reaction product of phosphorus oxychloride and 4,4'-thiobis(6-t-butyl-m-cresol).
Claim 10
Dependent Claim
15 words
The composition of claim 1 wherein the organic phosphonate is an organic ester of 3-t-butyl-4-hydroxy-5-methylbenzylphosphonate.
Claim 11
Dependent Claim
11 words
The composition of claim 9 wherein the organic phosphonate is di-n-octadecyl-3-t-butyl-4-hydroxy-5-methylbenzylphosphonate.
Claim 12
Dependent Claim
17 words
The composition of claim 1 wherein the organic phosphonate is a phosphonate ester of the formula ##STR5##
Claim 13
Dependent Claim
14 words
The composition of claim 1 wherein the organic phosphonate is a 2,4,6-tris-(dialkyl phosphonato)-1,3,5 triazine.
Claim 14
Dependent Claim
15 words
The composition of claim 12 wherein the organic phosphonate is a 2,4,6 tris-(dialkenyl phosphonato)-1,3,5 triazine.
Claim 15
Dependent Claim
14 words
The composition of claim 13 wherein the organic phosphonate is 2,4,6 tris-(diallyl phosphonato)-1,3,5 triazine.
Claim 16
Dependent Claim
11 words
The composition of claim 1 wherein the organic phosphonate is diamylamylphosphonate.
Claim 17
Dependent Claim
11 words
The composition of claim 1 wherein the organic phosphonate is diallylallylphosphonate.
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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) | 1982-04-09 | 1982-10-09 | 1983-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-09 | 1986-10-09 | 1987-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-09 | 1990-10-09 | 1991-04-10 | $7700.00 | Window Closed / Lapsed |