US4461885A
Expired / Lapsed
US
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Nylon preparation from unsaturated nitrite with amino acid
Assignee: Standard Oil Co
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Filing: 1980-12-08
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Granted: 1984-07-24
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Expires: 2000-12-08
Abstract
Abstract Polyamides can be formed in good yields by the copolymerization of at least one alpha, beta-unsaturated nitrile with at least one amino acid. These polymers are suitable for use as fibers, plastics, films and molding resins.
Inventors
- 👤 Mu-Yen M. Wu
- 👤 Lawrence E. Ball
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:23
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/08
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
21 words
A process for producing a polymer containing a polyamide repeating unit comprising contacting an alpha, beta-unsaturated nitrile with an amino acid.
Claim 2
Dependent Claim
21 words
A process for producing a polymer containing a polyamide repeating unit comprising contacting an alpha, beta-unsaturated nitrile with an amino acid.
Claim 3
Dependent Claim
18 words
The process of claim 1 wherein said process is conducted in the presence of a free radical inhibitor.
Claim 4
Dependent Claim
18 words
The process of claim 1 wherein said alpha, beta-unsaturated nitrile is at least one of acrylonitrile and methacrylonitrile.
Claim 5
Dependent Claim
19 words
The process of claim 1 wherein said process is conducted at a temperature between 125° C. and 225° C.
Claim 6
Dependent Claim
16 words
The process of claim 1 wherein said process is carried out in the absence of oxygen.
Claim 7
Dependent Claim
17 words
The process of claim 5 wherein said process is carried out in the presence of gaseous ammonia.
Claim 8
Dependent Claim
20 words
The process of claim 1 wherein there is at least one mole of water per mole of alpha, beta-unsaturated nitrile.
Claim 9
Dependent Claim
11 words
The process of claim 1 wherein acrylonitrile is copolymerized with beta-alanine.
Claim 10
Dependent Claim
12 words
The process of claim 1 wherein acrylonitrile is copolymerized with omega-aminocaproic acid.
Claim 11
Dependent Claim
21 words
The process of claim 1 wherein acrylonitrile is copolymerized with at least one of 11-amino dodecanoic acid and 12-amino dodecanoic acid.
Claim 12
Dependent Claim
20 words
The process of claim 1 wherein the molar ratio of the alpha, beta-unsaturated nitrile to the amino acid is 0.2-5:1.
Claim 13
Dependent Claim
12 words
The process of claim 11 wherein the molar ratio is about 1:1.
Claim 14
Dependent Claim
44 words
A process for producing a copolymer containing at least two types of polyamide repeating units comprising contacting an alpha, beta-unsaturated nitrile with an amino acid of the following structure: ##STR5## wherein R 2 is a inert hydrocarbon substituent and n is 2 to 11.
Claim 15
Dependent Claim
44 words
A process for producing a copolymer containing at least two types of polyamide repeating units comprising contacting an alpha, beta-unsaturated nitrile with an amino acid of the following structure: ##STR5## wherein R 2 is a inert hydrocarbon substituent and n is 2 to 11.
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) | 1987-07-24 | 1988-01-23 | 1988-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-24 | 1992-01-23 | 1992-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-24 | 1996-01-23 | 1996-07-24 | $7700.00 | Window Closed / Lapsed |