US4412061A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of a polyamide from unsaturated nitrile, lactam and water
Assignee: Standard Oil Co
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Filing: 1980-12-24
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Granted: 1983-10-25
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Expires: 2000-12-24
Abstract
Abstract This invention relates to a new process for preparing a copolyamide comprising polymerizing an alpha, beta-unsaturated nitrile and water with a molar excess of a lactam. In one embodiment, acrylonitrile, water and caprolactam are polymerized to form a nylon-3,6.
Inventors
- 👤 Mu-Yen M. Wu
- 👤 Lawrence E. Ball
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:06
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/08; C08G69/14
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
22 words
A process for producing a resinous copolyamide comprising polymerizing an alpha, beta-unsaturated nitrile and water with a molar excess of a lactam.
Claim 2
Dependent Claim
22 words
A process for producing a resinous copolyamide comprising polymerizing an alpha, beta-unsaturated nitrile and water with a molar excess of a lactam.
Claim 3
Dependent Claim
12 words
The process of claim 1 wherein the alpha, beta-unsaturated nitrile is acrylonitrile.
Claim 4
Dependent Claim
10 words
The process of claim 1 wherein the lactam is caprolactam.
Claim 5
Dependent Claim
19 words
The process of claim 1 wherein said process is conducted at a temperature between 150° C. and 300° 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
20 words
The process of claim 1 wherein the ratio of the nitrile of the lactam is less than 0.5 to 1.
Claim 8
Dependent Claim
14 words
The process of claim 6 wherein the ratio is less than 0.33 to 1.
Claim 9
Dependent Claim
19 words
The process of claim 1 wherein the ratio of the nitrile to the water is about 1 to 1.
Claim 10
Dependent Claim
30 words
The process of claim 1 wherein the nitrile has the following formula: ##STR4## wherein each R 1 is independently selected from the group consisting of hydrogen and C 1-4 alkyls.
Claim 11
Dependent Claim
36 words
The process of claim 1 wherein the lactam has the following formula: ##STR5## wherein each R 2 is independently selected from the group consisting of hydrogen and C 1-4 alkyls and x is 3 to 11.
Claim 12
Dependent Claim
11 words
The process of claim 10 wherein x is 3 to 5.
Claim 13
Dependent Claim
15 words
The process of claim 1 wherein the monomers are contacted with a tertiary amine catalyst.
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) | 1986-10-24 | 1987-04-25 | 1987-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-24 | 1991-04-25 | 1991-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-24 | 1995-04-25 | 1995-10-25 | $7700.00 | Window Closed / Lapsed |