US3886114A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synergistic antioxidant combination
Assignee: Vanderbilt Chemicals LLC
•
Filing: 1973-08-24
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Granted: 1975-05-27
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Expires: 1993-08-24
Abstract
Abstract The specification relates to a synergistic combination of a phosphite and either a phenol or an amine. The specification relates also to the use of this combination as an antioxidant for natural rubber.
Inventors
- 👤 Howard C Beadle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:50
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C08K5/3432; C08K5/3437; C08K5/0008; C08K5/005; C08K5/04; C08K5/13; C08K5/17; C08K5/18; C08K5/49; C08K5/51; C08K5/52; C08K5/524; C08L; C08L7/00; C08L71/00; Y; Y10; Y10S; Y10S524/00; Y10S524/925
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
82 words
A SYNERGISTIC MIXTURE FOR PROTECTING NATURAL RUBBER AGAINST HEAT AND OXIDATION DEGRADATION WHICH CONSISTS ESSENTIALLY OF ABOUT 0.50 TO 1.75 PARTS OF A PHOSPHITE SELECTED FROM THE GROUP CONSISTING OF DECAKIS (NONLYPHENYL)HEPTAKIS (DIPROPYLENE GLYCOL)OCTAPHOSPHITE, TETRAKIS(NONYLPHENYL)POLYPROPYLENE GLYCOL 425 DIPHOSPHITE, POLYPHENYL DIPROPYLENE GLYCOL PHOSPHITE AND MIXTURES THEREOF, AND ABOUT 1.50 TO 0.25 PARTS OF A PHENOL SELECTED FROM THE GROUP CONSISTING OF MIXED POLYBUTYLATED BISPHENOL A, 2,6-DI-T-BUTYL-4-METHYLPHENOL STYRENATED PHENOL, 2,2''-METHYLENEBIS(4-METHYL-6-TBUTYLPHENOL), 4,4''-DIHYDROXYDIPHENOL, 4,4''-THIOBIS(6-T-BUTYLP-CRESO), P-T-BUTYLPHENOL, P-ISOPROPULPHENOL, P-(1,1,3,3TETRAMETHYLBUTYL)PHENOL, THYMOL, MIXED M- AND P-CRESOL, P-NONYLPHENOL, AND MIXTURES THEREOF.
Claim 2
Dependent Claim
82 words
A SYNERGISTIC MIXTURE FOR PROTECTING NATURAL RUBBER AGAINST HEAT AND OXIDATION DEGRADATION WHICH CONSISTS ESSENTIALLY OF ABOUT 0.50 TO 1.75 PARTS OF A PHOSPHITE SELECTED FROM THE GROUP CONSISTING OF DECAKIS (NONLYPHENYL)HEPTAKIS (DIPROPYLENE GLYCOL)OCTAPHOSPHITE, TETRAKIS(NONYLPHENYL)POLYPROPYLENE GLYCOL 425 DIPHOSPHITE, POLYPHENYL DIPROPYLENE GLYCOL PHOSPHITE AND MIXTURES THEREOF, AND ABOUT 1.50 TO 0.25 PARTS OF A PHENOL SELECTED FROM THE GROUP CONSISTING OF MIXED POLYBUTYLATED BISPHENOL A, 2,6-DI-T-BUTYL-4-METHYLPHENOL STYRENATED PHENOL, 2,2''-METHYLENEBIS(4-METHYL-6-TBUTYLPHENOL), 4,4''-DIHYDROXYDIPHENOL, 4,4''-THIOBIS(6-T-BUTYLP-CRESO), P-T-BUTYLPHENOL, P-ISOPROPULPHENOL, P-(1,1,3,3TETRAMETHYLBUTYL)PHENOL, THYMOL, MIXED M- AND P-CRESOL, P-NONYLPHENOL, AND MIXTURES THEREOF.
Claim 3
Independent Claim
93 words
A method for protecting natural rubber against heat and oxidation degradation which comprises compounding the rubber with a synergistic antioxidant mixture consisting essentially of about 0.50 to 1.75 parts of a phosphite selected from the group consisting of decakis (nonylphenyl)haptakis (dipropylene glycol) octaphosphite, tetrakis(nonylphenyl)polypropylene glycol 425 diphosphite, polyphenyl dipropylene glycol phosphite and mixtures thereof, and about 1.25 to 0.25 parts of a phenol selected from the group consisting of mixed polybutylated bisphenol A, 2,6-di-t-butyl-4-methylphenol, styrenateD phenol,2,2''-methylenebis(4-methyl-6-t-butylphenol), 4,4''-dihydroxydiphenol, 4,4''-thiobis (6-t-butyl-o-cresol), p-t-butylphenol, p-isopropylphenol, p-(1,1,3, 3-tetramethylbutyl) phenol, thymol, mixed m- and p-cresol, p-nonylphenol, and mixtures thereof.
Claim 4
Independent Claim
93 words
A method for protecting natural rubber against heat and oxidation degradation which comprises compounding the rubber with a synergistic antioxidant mixture consisting essentially of about 0.50 to 1.75 parts of a phosphite selected from the group consisting of decakis (nonylphenyl)haptakis (dipropylene glycol) octaphosphite, tetrakis(nonylphenyl)polypropylene glycol 425 diphosphite, polyphenyl dipropylene glycol phosphite and mixtures thereof, and about 1.25 to 0.25 parts of a phenol selected from the group consisting of mixed polybutylated bisphenol A, 2,6-di-t-butyl-4-methylphenol, styrenateD phenol,2,2''-methylenebis(4-methyl-6-t-butylphenol), 4,4''-dihydroxydiphenol, 4,4''-thiobis (6-t-butyl-o-cresol), p-t-butylphenol, p-isopropylphenol, p-(1,1,3, 3-tetramethylbutyl) phenol, thymol, mixed m- and p-cresol, p-nonylphenol, and mixtures thereof.
Claim 5
Dependent Claim
87 words
A composition with improved protection against heat and oxidation degradation comprising natural rubber and a synergistic mixture which consists essentially of about 0.50 to 1.75 parts of a phosphite selected from the group consisting of decakis(nonylphenyl)heptakis (dipropylene glycol)octaphosphite, tetrakis(nonylphenyl) polypropylene glycol 425 diphosphite, polyphenyl dipropylene glycol phosphite and mixtures thereof, and about 1.25 to 0.25 parts of a phenol selected from the group consisting of mixed polybutylated bisphenol A, 2,6-di-t-butyl-4-methylphenol, styrenated phenol,2,2''-methylenebis(4-methyl-6-t-butylphenol), 4,4''-dihydroxydiphenol, 4,4''-thiobis(6-t-butyl-o-cresol), p-t-butylphenol, p-isopropylphenol, p-(1,1,3,3-tetramethyl-butyl) phenol, thymol, mixed m- and p-cresol, p-nonylphenol, and mixtures thereof.
Claim 6
Dependent Claim
87 words
A composition with improved protection against heat and oxidation degradation comprising natural rubber and a synergistic mixture which consists essentially of about 0.50 to 1.75 parts of a phosphite selected from the group consisting of decakis(nonylphenyl)heptakis (dipropylene glycol)octaphosphite, tetrakis(nonylphenyl) polypropylene glycol 425 diphosphite, polyphenyl dipropylene glycol phosphite and mixtures thereof, and about 1.25 to 0.25 parts of a phenol selected from the group consisting of mixed polybutylated bisphenol A, 2,6-di-t-butyl-4-methylphenol, styrenated phenol,2,2''-methylenebis(4-methyl-6-t-butylphenol), 4,4''-dihydroxydiphenol, 4,4''-thiobis(6-t-butyl-o-cresol), p-t-butylphenol, p-isopropylphenol, p-(1,1,3,3-tetramethyl-butyl) phenol, thymol, mixed m- and p-cresol, p-nonylphenol, and mixtures thereof.
Claim 7
Dependent Claim
31 words
The mixture according to claim 1 in which the synergistic mixture is about 0.50 to 1.75 parts of decakis(nonylphenyl)heptakis (dipropylene glycol)octaphosphite and about 1.25 to 0.25 parts of polybutylated bisphenol A.
Claim 8
Dependent Claim
30 words
The mixture according to claim 1 in which the synergistic mixture is about 0.50 to 1.75 parts of decakis(nonylphenyl)heptakis (dipropylene glycol)octaphosphite and about 1.25 to 0.25 parts of styrenated phenol.
Claim 9
Dependent Claim
30 words
The mixture according to claim 1 in which the synergistic mixture is about 0.50 to 1.75 parts of decakis(nonylphenyl)heptakis (dipropylene glycol)octaphosphite and about 1.25 to 0.25 parts of 2,2''-methylenebis (4-methyl-6-t-butylphenol).
Claim 10
Dependent Claim
30 words
The mixture according to claim 1 in which the synergistic mixture is about 0.50 to 1.75 parts of decakis(nonylphenyl)heptakis (dipropylene glycol)octaphosphite and about 1.25 to 0.25 parts of 4,4''-thiobis (6-t-butyl-o-cresol).
Claim 11
Dependent Claim
32 words
The mixture according to claim 1 in which the synergistic mixture is about 0.50 to 1.75 parts of polyphenyl dipropylene glycol phosphite and about 1.25 to 0.25 parts of polybutylated bisphenol A.
Claim 12
Dependent Claim
32 words
The mixture according to claim 1 in which the synergistic mixture is about 0.50 to 1.75 parts of tetraphenyl dipropylene glycol diphosphite and about 1.25 to 0.25 parts of polybutylated bisphenol A.
Claim 13
Dependent Claim
30 words
The mixture according to claim 1 in which the synergistic mixture is about 0.50 to 1.75 parts of decakis(nonylphenyl)heptakis (dipropylene glycol) octaphosphite and about 1.25 to 0.25 parts of p-t-butylphenol.
Claim 14
Dependent Claim
29 words
The mixture according to claim 1 in which the synergistic mixture is about 0.50 to 1.75 parts of decakis(nonylphenyl)heptakis (dipropylene glycol)octaphosphite and about 1.25 to 0.25 parts of p-nonylphenol.
Claim 15
Dependent Claim
30 words
The mixture according to claim 1 in which the synergistic mixture is about 0.50 to 1.75 parts of decakis(nonylphenyl)heptakis (dipropylene glycol) octaphosphite and about 1.25 to 0.25 parts of 2,6-di-t-butyl-4-methylphenol.
Claim 16
Dependent Claim
29 words
The mixture according to claim 1 in which the synergistic mixture is about 0.50 to 1.75 parts of decakis(nonylphenyl)heptakis(dipropylene glycol) octaphosphite and about 1.25 to 0.25 parts of 4,4''-dihydroxydiphenol.
Claim 17
Dependent Claim
31 words
The mixture according to claim 1 in which the synergistic mixture is about 0.50 to 1.75 parts of tetrakis(nonylphenyl)polypropylene glycol diphosphite and about 1.24 to 0.25 parts of polybutylated bisphenol A.
Claim 18
Dependent Claim
29 words
The mixture according to claim 1 in which the syneRgistic mixture is about 0.50 to 1.75 parts of decakis(nonylphenyl)heptakis(dipropylene glycol) octaphosphite and about 1.25 to 0.25 parts of p-isopropylphenol.
Claim 19
Dependent Claim
30 words
The mixture according to claim 1 in which the synergistic mixture is about 0.50 to 1.75 parts of decakis(nonylphenyl)heptakis(dipropylene glycol) octaphosphite and about 1.25 to 0.25 parts of p-(1,1,3,3-tetramethylbutyl) phenol.
Claim 20
Dependent Claim
29 words
The mixture according to claim 1 in which the synergistic mixture is about 0.50 to 1.75 parts of decakis(nonylphenyl)heptakis(dipropylene glycol) octaphosphite and about 1.25 to 0.25 parts of thymol.
Claim 21
Dependent Claim
32 words
The mixture according to claim 1 in which the synergistic mixture is about 0.50 to 1.75 parts of decakis(nonylphenyl)heptakis(dipropylene glycol) octaphosphite and about 1.25 to 0.25 parts of mixed m- and p-cresol.
Claim 22
Dependent Claim
18 words
The mixture according to claim 1 in which the polyphenyl dipropylene glycol phosphite is tetraphenyl dipropylene glycol phosphite.
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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) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |