US4051067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of unsaturated carboxylic acid esters with mixtures of polyalkyleneamines and arylenediamines
Assignee: Monsanto Co
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Filing: 1975-12-29
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Granted: 1977-09-27
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Expires: 1995-12-29
Abstract
Abstract A method of inhibiting polymerization of unsaturated carboxylic acid esters and improved unsaturated carboxylic acid ester compositions are described. The method comprises, and the compositions are prepared by, incorporating into the ester composition a combination comprising polyalkyleneamine and arylenediamine of the formula <IMAGE> in which X is hydrogen, chloro, trichloromethyl, trifluoromethyl, nitro, lower alkyl, lower alkoxy or phenoxy, R is hydrogen or alkyl, and R1 is alkyl or phenyl or R and R1 together with the nitrogen atom is a heterocycle selected from the group consisting of pyrrolidinyl, 2,5-dimethyl pyrrolidinyl, piperidino and hexahydro-1H-azepin-1-yl.
Inventors
- 👤 Gene Ray Wilder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:19
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/52; C07C69/533; C07C69/54; C07C67/00; C07C67/48; C07C67/62; C09; C09K; C09K15/00; C09K15/04; C09K15/16; C09K15/18
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
104 words
An inhibitor composition comprising polyalkyleneamine which is an acyclic aliphatic compound having amino groups attached through alkylene of 1-10 carbon atoms and arylenediamine of the formula ##STR3## in which X is hydrogen, chloro, trichloromethyl, trifluoromethyl, nitro, lower alkyl, lower alkoxy, or phenoxy, R is hydrogen or alkyl, R 1 is alkyl or phenyl, or R and R 1 together with the nitrogen atom is a heterocyclic radical selected from the group consisting of pyrrolidinyl, 2,5-dimethylpyrrolidinyl, piperidino and hexahydro-1H-azepin-1-yl in which the polyalkyleneamine is 10-90 parts by weight and the arylenediamine is 10-90 parts by weight per 100 parts by weight of the inhibitor composition.
Claim 2
Dependent Claim
104 words
An inhibitor composition comprising polyalkyleneamine which is an acyclic aliphatic compound having amino groups attached through alkylene of 1-10 carbon atoms and arylenediamine of the formula ##STR3## in which X is hydrogen, chloro, trichloromethyl, trifluoromethyl, nitro, lower alkyl, lower alkoxy, or phenoxy, R is hydrogen or alkyl, R 1 is alkyl or phenyl, or R and R 1 together with the nitrogen atom is a heterocyclic radical selected from the group consisting of pyrrolidinyl, 2,5-dimethylpyrrolidinyl, piperidino and hexahydro-1H-azepin-1-yl in which the polyalkyleneamine is 10-90 parts by weight and the arylenediamine is 10-90 parts by weight per 100 parts by weight of the inhibitor composition.
Claim 3
Dependent Claim
26 words
The composition of claim 1 which comprises 20-80 parts by weight polyalkyleneamine and 20-80 parts by weight arylenediamine per 100 parts by weight of the composition.
Claim 4
Dependent Claim
16 words
The composition of claim 2 in which the arylenediamine is a p-phenylenediamine and X is hydrogen.
Claim 5
Dependent Claim
16 words
The composition of claim 3 in which the polyalkyleneamine is a polyethyleneamine of 3-7 nitrogen atoms.
Claim 6
Dependent Claim
11 words
The composition of claim 4 in which the polyethyleneamine is tetraethylenepentamine.
Claim 7
Dependent Claim
14 words
The composition of claim 4 in which R and R 1 are lower alkyl.
Claim 8
Dependent Claim
13 words
The composition of claim 6 in which R and R 1 are methyl.
Claim 9
Dependent Claim
15 words
The composition of claim 4 in which R is hydrogen and R 1 is phenyl.
Claim 10
Dependent Claim
16 words
The composition of claim 4 in which R is hydrogen and R 1 is lower alkyl.
Claim 11
Dependent Claim
11 words
The composition of claim 9 in which R 1 is tertamyl.
Claim 12
Dependent Claim
11 words
The composition of claim 4 in which ##STR4## is heterocyclic radical.
Claim 13
Dependent Claim
10 words
The composition of claim 11 in which ##STR5## is hexahydro-1H-azepin-1-yl.
Claim 14
Dependent Claim
11 words
The composition of claim 4 in which the arylenediamine is N-(1,3-dimethylbutyl)-N'-(phenyl)-p-phenylenediamine.
Claim 15
Dependent Claim
16 words
The composition of claim 4 in which the arylenediamine is a mixture comprising N-(1,4-dimethylpentyl)-N'-(phenyl)-p-phenylenediamine and N-(1,3-dimethylbutyl)-N'-(phenyl)-o-phenylenediamine.
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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) | 1980-09-26 | 1981-03-28 | 1981-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-26 | 1985-03-28 | 1985-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-26 | 1989-03-28 | 1989-09-27 | $7700.00 | Window Closed / Lapsed |