US4459394A
Expired / Lapsed
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Preparation of nylon polyamide with cobalt salt
Assignee: Standard Oil Co
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Filing: 1981-12-30
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Granted: 1984-07-10
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Expires: 2001-12-30
Abstract
Abstract A polyamide is produced by polymerizing at least one of alpha, beta unsaturated carboxylic acid, an ammonium salt of an alpha, beta unsaturated carboxylic acid, an alpha, beta unsaturated nitrile and water, a beta-amino propionic acid or alkyl derivative thereof and an alpha, beta unsaturated amide and ammonia in the presence of a catalyst containing cobalt. Preferred catalysts comprise cobaltous carboxylates and cobaltic salts of the enol of beta-di-ketones.
Inventors
- 👤 Gerald P. Coffey
- 👤 Rimvydas L. Cepulis
- 👤 Benedict S. Curatolo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:09
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/26; C08G69/28
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
42 words
A process for preparing a nylon type polyamide comprising polymerizing an ammonium salt of an alpha,beta-unsaturated monocarboxylic acid in contact with a catalyst comprising either a cobaltous salt of a carboxylic acid or a cobaltic salt of the enol of a beta-di-ketone.
Claim 2
Dependent Claim
42 words
A process for preparing a nylon type polyamide comprising polymerizing an ammonium salt of an alpha,beta-unsaturated monocarboxylic acid in contact with a catalyst comprising either a cobaltous salt of a carboxylic acid or a cobaltic salt of the enol of a beta-di-ketone.
Claim 3
Dependent Claim
18 words
The process of claim 1 wherein the catalyst comprises the cobaltic salt of the enol of a beta-di-ketone.
Claim 4
Dependent Claim
29 words
The process of claim 2 wherein the catalyst comprises one or more of cobalt (III) dibenzoylmethane, cobalt (III) acetylbenzoylmethane, cobalt (III) ethylacetylacetate, cobalt (III) 3-methylbut-1-en-3yl acetylacetate, cobalt (III) acetylacetonate.
Claim 5
Dependent Claim
14 words
The process of claim 3 wherein the catalyst comprises the cobaltic salt of acetylacetone.
Claim 6
Dependent Claim
16 words
The process of claim 1 wherein the catalyst comprises the cobaltous salt of a carboxylic acid.
Claim 7
Dependent Claim
47 words
The process of claim 5 wherein the catalyst is selected from the group consisting of cobalt (II) acetate, cobalt (II) cyclohexanebutyrate, cobalt (II) formate, cobalt (II) oleate, cobalt (II) benzoate, cobalt (II) naphthenate, cobalt (II) citrate, cobalt (II) resinate and cobalt (II) oxalate or cobalt (II) octoate.
Claim 8
Dependent Claim
11 words
The process of claim 6 wherein the catalyst comprises cobaltous octoate.
Claim 9
Dependent Claim
21 words
The process of claim 1 wherein the ammonium salt is selected from the group consisting of ammonium acrylate and ammonium methacrylate.
Claim 10
Dependent Claim
23 words
The process of claim 1 wherein the ammonium salt is prepared by the in situ reaction of an alpha,beta-unsaturated monocarboxylic acid and ammonia.
Claim 11
Dependent Claim
21 words
The process of claim 9 wherein the monocarboxylic acid is selected from the group consisting of methacrylic acid and acrylic acid.
Claim 12
Dependent Claim
25 words
The process of claim 1 wherein the catalyst concentration is between 0.05 to 5.0 mole percent based on the moles of monomer in the reaction.
Claim 13
Dependent Claim
27 words
The process of claim 1 wherein the catalyst concentration is between 0.05 to 1.0 mole percent based on the total moles of monomer in the polymerization system.
Claim 14
Dependent Claim
26 words
The process of claim 1 wherein the polyamide contains in its backbone ethylene amido units of the following structure: ##STR5## wherein R is an alkyl radical.
Claim 15
Dependent Claim
9 words
The process of claim 13 wherein R is methyl.
Claim 16
Dependent Claim
18 words
The process of claim 1 wherein an ammonium salt of an alpha,beta-unsaturated monocarboxylic acid and caprolactam are polymerized.
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) | 1987-07-10 | 1988-01-09 | 1988-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-10 | 1992-01-09 | 1992-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-10 | 1996-01-09 | 1996-07-10 | $7700.00 | Window Closed / Lapsed |