Patent US3644264A successfully refreshed from Google Patents.
US3644264A
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US
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N-alkyl pyrrolidone-plasticized copolylactam compositions
Assignee: EIDP Inc
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Filing: 1969-08-01
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Granted: 1972-02-22
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Expires: 1989-08-01
Abstract
Abstract Polymerizable lactam compositions comprising an anionic catalyst, a polymerization promoter, 50 to 90 percent of caprolactam, at least 1 percent of a lactam having seven to 12 carbon atoms in the lactam ring, and 2 to 20 percent of the plasticizer N-alkyl pyrrolidone, and the manufacture of impactresistant articles by casting and anionically polymerizing the mixture.
Inventors
- 👤 Thomas J Hyde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:13
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/08; C08G69/14; C08G69/16; C08G69/18; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C08K5/3415
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
11 words
A composition of claim 1 wherein the plasticizer is N-methyl pyrrolidone.
Claim 2
Dependent Claim
13 words
A composition of claim 2 containing 1 to 15 percent of laurolactam moieties.
Claim 3
Dependent Claim
13 words
A composition of claim 2 containing 1 to 15 percent of caprylolactam moieties.
Claim 4
Dependent Claim
52 words
A polymerizable lactam composition comprising an anionic catalyst, a polymerization promoter, and containing (a) about from 65 to 90 percent caprolactam, (b) at least 1 percent of a lactam having seven to 12 carbon atoms in the lactam ring, and (c) about from 2 to 20 percent of the plasticizer N-alkyl pyrrolidone.
Claim 5
Dependent Claim
11 words
A composition of claim 5 wherein the plasticizer is N-methyl pyrrolidone.
Claim 6
Dependent Claim
13 words
A composition of claim 6 containing 1 to 15 percent of omega -laurolactam.
Claim 7
Dependent Claim
13 words
A composition of claim 6 containing 1 to 15 percent of omega -caprylolactam.
Claim 8
Dependent Claim
84 words
A process for making cast articles of impact-resistant plasticized copolylactam composition which comprises anionically polymerizing in a mold a mixture of lactams below the melting point of the resulting polylactam, said mixture containing an anionic catalyst, a polymerization promoter, and by weight of the total composition, about from 50 to 90 percent caprolactam, and at least 1 percent monomeric lactam having from seven to 12 carbon atoms in the lactam ring, in the presence of 2 to 20 percent of the plasticizer N-alkyl pyrrolidone.
Claim 9
Dependent Claim
11 words
A process of claim 9 wherein the plasticizer is N-methyl pyrrolidone.
Claim 10
Dependent Claim
11 words
A process of claim 10 wherein the monomeric lactam is laurolactam.
Claim 11
Dependent Claim
11 words
A process of claim 10 wherein the monomeric lactam is caprylolactam.
Claim 12
Dependent Claim
16 words
A process of claim 11 wherein the amount of laurolactam is from 1 to 15 percent.
Claim 13
Dependent Claim
16 words
A process of claim 12 wherein the amount of caprylolactam is from 1 to 15 percent.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-21 | 1975-08-23 | 1976-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-21 | 1979-08-23 | 1980-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-21 | 1983-08-23 | 1984-02-22 | $7700.00 | Window Closed / Lapsed |