Patent US3987011A successfully refreshed from Google Patents.
US3987011A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing poly-n-alkenylamines
Assignee: Individual
•
Filing: 1974-12-16
•
Granted: 1976-10-19
•
Expires: 1994-12-16
Abstract
Abstract A method for preparing poly-N-alkenylamines having the following formula (I) ##EQU1## WHERE A is a tertiary aromatic or heterocyclic amine, connected to a carbon atom through nitrogen, R and R' are similar or different hydrogen or lower alkyl, and n is the degree of polymerization, consisting in that the secondary aromatic or heterocyclic amines or their derivatives, for example, diphenylamine, carbazole, phenthiazine, phenoxazine, 3-chloro- and 3,6-dichlorocarbazole are treated with aldehydes having the formula (II) RR'CH-CH=O, where R and R 1 are the substances specified above, or their polymers capable of depolymerizing in an acid medium, in the presence of acid catalysts, in organic solvents. The said polymers are prepared by a single-step process without the separation of any intermediate products; the products prepared possess photosensitive properties and can be used, for example, in electrophotography and related processes.
Inventors
- 👤 Ekaterina Egorovna Sirotkina
- 👤 Viktor Dmitrievich Filimonov
- 👤 Ljubov Sergeevna Sizova
- 👤 Nina Alexandrovna Tsekhanovskaya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:02
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/07; G03G5/071; C; C08; C08F; C08F26/00; C08F26/06; C08F8/00; C08F8/30; C08F8/32
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
96 words
A method for preparing thermoplastic poly-N-alkenylamines having the general formula ##EQU2## where A is a tertiary heterocyclic amine, connected to the carbon atom through the nitrogen, R and R' are selected from the group consisting of hydrogen and lower alkyl, and n is the degree of polymerization, comprising reacting a secondary heterocyclic amine or derivatives thereof, with an aldehyde having the general formula RR'CH-CH=O, where R and R' are the substituents as specified above, or polymers thereof capable of depolymerizing in an acid medium, in the presence of an acid catalyst, and in an organic solvent.
Claim 2
Independent Claim
96 words
A method for preparing thermoplastic poly-N-alkenylamines having the general formula ##EQU2## where A is a tertiary heterocyclic amine, connected to the carbon atom through the nitrogen, R and R' are selected from the group consisting of hydrogen and lower alkyl, and n is the degree of polymerization, comprising reacting a secondary heterocyclic amine or derivatives thereof, with an aldehyde having the general formula RR'CH-CH=O, where R and R' are the substituents as specified above, or polymers thereof capable of depolymerizing in an acid medium, in the presence of an acid catalyst, and in an organic solvent.
Claim 3
Dependent Claim
25 words
A method according to claim 1, wherein said secondary amine is selected from the group consisting carbazole, phenthiazine, phenoxazine, 3-chloro- and 3,6-dichlorocarbazoles, or derivatives, thereof.
Claim 4
Dependent Claim
24 words
A method according to claim 1, wherein said aldehyde is selected from the group consisting of acetaldehyde, propionic aldehyde, butyric aldehyde and isobutyric aldehyde.
Claim 5
Dependent Claim
13 words
A method according to claim 1, wherein paraldehyde is used as the aldehyde.
Claim 6
Dependent Claim
36 words
A method according to claim 1, wherein strong proton-donating acids and Lewis acids selected from the group consisting of sulphuric, perchloric, hydrochloric acids, mixtures thereof, and the etherate of boron trifluoride are used as the catalysts.
Claim 7
Dependent Claim
29 words
A method according to claim 1, wherein the organic solvent is selected from the group consisting of aliphatic ketones, aromatic and chlorinated paraffin and aromatic hydrocarbons, nitroparaffins and dioxane.
Claim 8
Dependent Claim
36 words
A method according to claim 1, further comprising reacting said secondary amine and said aldehyde in the presence of an accelerator selected from the group consisting of carboxylic acids, anhydrides of carboxylic acids and aliphatic alcohols.
Claim 9
Dependent Claim
21 words
A method according to claim 1, wherein said secondary amine is selected from the group consisting of carbazole, 3-chlorocarbazole, and 3,6-dichlorocarbazole.
Claim 10
Dependent Claim
11 words
A method according to claim 8, wherein said aldehyde is monomeric.
References Cited (Backward Citations)
US3244517A
Cited
US3770428A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-10-19 | 1980-04-19 | 1980-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-19 | 1984-04-19 | 1984-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-19 | 1988-04-19 | 1988-10-19 | $7700.00 | Window Closed / Lapsed |