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US4256636A
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Azo-di-isobutyric acid-(N,N-hydroxyalkyl)-amidines
Assignee: Bayer AG
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Filing: 1979-09-17
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Granted: 1981-03-17
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Expires: 1999-09-17
Abstract
Abstract An azo di-isobutyric acid-(N,N'-hydroxyalkyl)-amidine corresponding to the formula (I): <IMAGE> (I) in which R and R', which may be the same or different, represent linear or branched alkylene radicals containing from 2 to 4 carbon atoms, and X represents R'-OH or H.
Inventors
- 👤 Ernst Roos
- 👤 Herbert Bartl
- 👤 Klaus Schuster
- 👤 Adolf Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:47
CPC Classifications
C; C07; C07C; C07C257/00; C07C257/10; C07C257/14; C08; C08F; C08F4/00; C08F4/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
40 words
An azo-di-isobutyric acid-(N,N'-hydroxyalkyl)-amidine corresponding to the formula (I): ##STR9## in which R and R', which may be the same or different, represent linear or branched alkylene radicals containing from 2 to 4 carbon atoms, and X represents R'--OH or H.
Claim 2
Dependent Claim
40 words
An azo-di-isobutyric acid-(N,N'-hydroxyalkyl)-amidine corresponding to the formula (I): ##STR9## in which R and R', which may be the same or different, represent linear or branched alkylene radicals containing from 2 to 4 carbon atoms, and X represents R'--OH or H.
Claim 3
Dependent Claim
105 words
A process for producing an azo-di-isobutyric acid-(N,N'-hydroxyalkyl)-amidine corresponding to the formula (I) as defined in claim 1, which comprises reacting an azo-di-isobutyric acid aminoalkyl ether containing from 1 to 4 carbon atoms in the alkyl group with at least one mono-alkanolamine containing from 2 to 4 carbon atoms or with a mixture of at least one monoalkanolamine and at least one dialkanolamine each containing from 2 to 4 carbon atoms in an alkanol radical, the molar ratio of monoalkanolamines to dialkanolamines in the mixture amounting to substantially 1:1, in substantially equivalent quantitative ratios at a temperature in the range of from 0° to 50° C.
Claim 4
Dependent Claim
68 words
A process for producing an azo-di-isobutyric acid-(N,N'-hydroxyalkyl)-amidine corresponding to the formula (I) as defined in claim 1, which comprises reacting an azo-di-isobutyric acid amidine, or an azo-di-isobutyric acid amidine of which the hydrogen atoms attached to the nitrogen atoms of the two amidine radicals are partly substituted by hydroxyalkyl radicals containing from 2 to 4 carbon atoms, with an alkylene oxide containing from 2 to 4 carbon atoms.
Claim 5
Dependent Claim
48 words
A modification of the process claimed in claim 2, wherein the imino groups of the azo-di-isobutyric acid iminoalkyl ether are initially completely or partly reacted with an alkylene oxide, and the alkyl ether groups and residual imino groups, if any, are subsequently condensed with a mono- and/or di-alkanolamine.
Claim 6
Dependent Claim
43 words
A modification of the process claimed in claim 3, wherein the azo-di-isobutyric acid amidine is initially subjected to a partial reaction with an alkylene oxide, followed by condensation with a mono- and/or di-alkanolamine up to the required degree of substitution, or vice versa.
Claim 7
Dependent Claim
40 words
A process for producing a compound of the formula (I), in which X represents R'--OH, which comprises reacting a compound of the formula (I), in which X represents H, with an alkylene oxide containing from 2 to 4 carbon atoms.
Claim 8
Dependent Claim
40 words
A process for producing a compound of the formula (I), in which X represents R'--OH, which comprises reacting a compound of the formula (I), in which X represents H, with an alkylene oxide containing from 2 to 4 carbon atoms.
Claim 9
Dependent Claim
55 words
A process as claimed in claim 2, wherein, after the condensation of the azo-di-isobutyric acid iminoalkyl ether (1 mole) with a monoalkanolamine (4 moles) to form the azo-di-isobutyric acid-(N,N'-bis-hydroxyalkyl)-amidine, the azo-di-isobutyric acid-(N,N'-bis-hydroxyalkyl)-amidine thus obtained is reacted with 2 moles of an alkylene oxide containing from 2 to 4 carbon atoms to form an azo-di-isobutyric acid-(N,N',N'-tris-hydroxyalkyl)-amidine.
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) | 1984-03-16 | 1984-09-15 | 1985-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-16 | 1988-09-15 | 1989-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-16 | 1992-09-15 | 1993-03-17 | $7700.00 | Window Closed / Lapsed |