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US4045407A
Expired / Lapsed
US
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Process for preparing amideimide polymers in the presence of alcoholic solvent
Assignee: BP Corp North America Inc
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Filing: 1976-02-23
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Granted: 1977-08-30
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Expires: 1996-02-23
Abstract
Abstract Process of producing an amideimide polymer without using an acid having an acyl halide group which comprises reacting a composition comprising an aromatic diprimary amine and a tricarboxylic acid compound in an alcoholic solvent comprising an alkanol containing from 4 to 10 carbon atoms. In those cases where only diprimary aromatic amine is reacted, a tertiary amine is required. If desired, a glycol can be present.
Inventors
- 👤 Robert G. Keske
- 👤 James R. Stephens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:56
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/1075; C08G73/1082; C08G73/14
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
64 words
The process of producing an amideimide polymer without using an acid having an acyl halide group, which comprises reacting a composition comprising an aromatic diprimary amine and a tricarboxylic acid compound selected from the group consisting of trimellitic acid and trimellitic anhydride in an alcoholic solvent containing a tertiary amine wherein said alcoholic solvent comprises an alkanol containing from 4 to 10 carbon atoms.
Claim 2
Dependent Claim
64 words
The process of producing an amideimide polymer without using an acid having an acyl halide group, which comprises reacting a composition comprising an aromatic diprimary amine and a tricarboxylic acid compound selected from the group consisting of trimellitic acid and trimellitic anhydride in an alcoholic solvent containing a tertiary amine wherein said alcoholic solvent comprises an alkanol containing from 4 to 10 carbon atoms.
Claim 3
Dependent Claim
14 words
The process of claim 1, wherein said composition contains substantially no aliphatic diprimary amines.
Claim 4
Dependent Claim
34 words
The process of claim 2 wherein said alkanol is selected from the group consisting of 1-butanol and 1-pentanol and the weight ratio of tertiary amine to alkanol is from about 1:19 to about 1:1.
Claim 5
Dependent Claim
40 words
The process of claim 3, wherein said reaction is carried out in the presence of a glycol and said glycol is present in a concentration up to about 15% by weight of the total concentration of the glycol and alkanol.
Claim 6
Dependent Claim
16 words
The process of claim 4, wherein said reaction is initiated at about 50 to 70% solids.
Claim 7
Dependent Claim
24 words
The process of claim 1, wherein said aromatic diamine comprises at least one diamine selected from the group consisting of metaphenylenediamine, oxybisaniline and methylenebisaniline.
Claim 8
Dependent Claim
23 words
The process of claim 1, wherein an aliphatic diprimary amine containing 2 to 12 carbon atoms and an aromatic diprimary amine are reacted.
Claim 9
Dependent Claim
25 words
The process of claim 1, wherein said composition comprises at least one dicarboxylic acid selected from a group consisting of terephthalic acid and isophthalic acid.
Claim 10
Dependent Claim
84 words
The process of producing an amideimide polymer without using an acid containing an acyl halide group which comprises reacting a composition comprising an aromatic diprimary amine, an aliphatic polymethylene diprimary amine containing from 3 to 12 methylene units and a tricarboxylic acid compound selected from the group consisting of trimellitic acid and trimellitic anhydride in an alcoholic solvent comprising an alkanol containing 4 to 10 carbon atoms wherein the aliphatic diprimary amine comprises from about 10 to 90 weight percent of the diprimary amines.
Claim 11
Dependent Claim
84 words
The process of producing an amideimide polymer without using an acid containing an acyl halide group which comprises reacting a composition comprising an aromatic diprimary amine, an aliphatic polymethylene diprimary amine containing from 3 to 12 methylene units and a tricarboxylic acid compound selected from the group consisting of trimellitic acid and trimellitic anhydride in an alcoholic solvent comprising an alkanol containing 4 to 10 carbon atoms wherein the aliphatic diprimary amine comprises from about 10 to 90 weight percent of the diprimary amines.
Claim 12
Dependent Claim
34 words
The process of claim 9, wherein the polymethylene diprimary amine comprises from 20 to 50 weight percent of the diprimary amines and the aromatic diprimary amine correspondingly comprises from 50 to 80 weight percent.
Claim 13
Dependent Claim
12 words
The process of claim 10, wherein said composition comprises a tertiary amine.
Claim 14
Dependent Claim
18 words
The process of claim 10, wherein said alkanol is selected from the group consisting of 1-butanol and 1-pentanol.
Claim 15
Dependent Claim
34 words
The process of claim 10, wherein said composition comprises a glycol and the glycol is present in a concentration up to about 15% by weight of the total concentration of the glycol and alkanol.
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) | 1980-08-29 | 1981-02-28 | 1981-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-29 | 1985-02-28 | 1985-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-29 | 1989-02-28 | 1989-08-30 | $7700.00 | Window Closed / Lapsed |