US4007159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organic substrates stabilized by nitroalkane based hindered phenol compounds
Assignee: FMC Corp
•
Filing: 1976-04-30
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Granted: 1977-02-08
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Expires: 1996-04-30
Abstract
Abstract Organic substrates stabilized against oxidative deterioration by the use of high molecular weight hindered phenols based on the condensation of a nitroalkane with either a dialkyldithiocarbonate or with formaldehyde and a di-t-butylphenol or a substituted derivative of a di-t-butylphenol.
Inventors
- 👤 Harry Dounchis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:59
CPC Classifications
C; C09; C09K; C09K15/00; C09K15/04; C09K15/20; C09K15/24; C07; C07C; C07C205/00; C07C205/13; C07C205/17; C07C205/20; C07C291/00; C07C291/02; C08; C08K; C08K5/00; C08K5/16; C08K5/32; Y; Y10; Y10S; Y10S524/00; Y10S524/925; Y10S524/929
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
99 words
Stabilized compositions comprising an organic material normally susceptible to oxidative deterioration containing per 100 parts of said organic material from about 0.001 to 5 parts by weight of a stabilizing antioxidant compound selected from the group having the formulas: ##STR9## wherein Ar represents a 3,5-di-tertiary-butyl-4-hydroxybenzyl radical, R 1 and R 2 each may represent hydrogen, a lower C 1 -C 4 alkyl radical or an Ar radical, and ##STR10## wherein Ar is as previously described and R 3 represents a lower C 1 -C 4 alkyl or a methoxy or ethoxy substituted lower C 1 -C 4 alkyl radical.
Claim 2
Dependent Claim
99 words
Stabilized compositions comprising an organic material normally susceptible to oxidative deterioration containing per 100 parts of said organic material from about 0.001 to 5 parts by weight of a stabilizing antioxidant compound selected from the group having the formulas: ##STR9## wherein Ar represents a 3,5-di-tertiary-butyl-4-hydroxybenzyl radical, R 1 and R 2 each may represent hydrogen, a lower C 1 -C 4 alkyl radical or an Ar radical, and ##STR10## wherein Ar is as previously described and R 3 represents a lower C 1 -C 4 alkyl or a methoxy or ethoxy substituted lower C 1 -C 4 alkyl radical.
Claim 3
Dependent Claim
13 words
The composition of claim 1 wherein the organic material is a synthetic rubber.
Claim 4
Dependent Claim
15 words
The composition of claim 1 wherein the organic material is a polyolefin homopolymer or copolymer.
Claim 5
Dependent Claim
11 words
The composition of claim 1 wherein the organic material is polypropylene.
Claim 6
Dependent Claim
12 words
The composition of claim 1 wherein the stabilizing antioxidant is 2,6-di-t-butyl-4(2-methyl-2-nitropropyl) phenol.
Claim 7
Dependent Claim
11 words
The composition of claim 1 wherein the stabilizing antioxidant is 1,3-bis(3,5-di-t-butyl-4-hydroxyphenyl)-2-nitropropane.
Claim 8
Dependent Claim
12 words
The composition of claim 1 wherein the stabilizing antioxidant is tris-(3,5-di-t-butyl-4-hydroxybenzyl) nitromethane.
Claim 9
Dependent Claim
12 words
The composition of claim 1 wherein the stabilizing antioxidant is 3,5-di-t-butyl-4-hydroxybenzyl 1-(3,5-di-t-butyl-4-hydroxybenzyl)-methoxypropane-2-nitronate.
Claim 10
Dependent Claim
12 words
The composition of claim 1 wherein the stabilizing antioxidant is 3,5-di-t-butyl-4-hydroxybenzyl 1-(3,5-di-t-butyl-4-hydroxybenzyl)-propane-2-nitronate.
Claim 11
Dependent Claim
12 words
The composition of claim 1 wherein the stabilizing antioxidant is 3,5-di-t-butyl-4-hydroxybenzyl 1-(3,5-di-t-butyl-4-hydroxybenzyl)-butane-2-nitronate.
References Cited (Backward Citations)
US2344489A
Cited
US3236667A
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US3364172A
Cited
US3384613A
Cited
US3870678A
Cited
US3903049A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-02-08 | 1980-08-09 | 1981-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-08 | 1984-08-09 | 1985-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-08 | 1988-08-09 | 1989-02-08 | $7700.00 | Window Closed / Lapsed |