US3883485A
Expired / Lapsed
US
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Copolyamides containing caprolactam, lauriclactam and hexamethylene diamine adipate
Assignee: Plate Bonn GmbH
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Filing: 1973-07-31
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Granted: 1975-05-13
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Expires: 1993-07-31
Abstract
Abstract The invention relates to copolyamides containing caprolactam, lauriclactam, hexamethylene diamine adipate and hexamethylene diamine salt of an aliphatic dicarboxylic acid with a carbon chain of 9, 10, 12 or 13 carbon atoms. The copolyamides are useful as heat-sealing agents.
Inventors
- 👤 Fritz Raabe
- 👤 Jong Eduard De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:34
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/36; Y; Y10; Y10S; Y10S524/00; Y10S524/904
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
77 words
A SOLID COPOLYAMIDE CONSISTING ESSENTIALLY OF RECURRING UNITS OF CAPROLACTAM, LAURICLACTAM, HEXAMETHYLENE DIAMINE ADIPATE AND A HEXAMETHYLENE DIAMINE SALT OF AN ALIPHATIC DICARBOXYLIC ACID OF THE FORMULA HOOC-(CH2)N-COOH IN WHICH N IS THE NUMBER 7,8, 10 OR 11, SAID UNITS BEING INCORPORATED IN THE COPOLYAMIDE BY POLYMERISATION IN THE FOLLOWING PROPORTIONS: CAPROLACTAM 25-35% BY WEIGHT LAURICLACTAM 20-40% BY WEIGHT HEXAMETHYLENE DIAMINE ADIPATE 8-25% BY WEIGHT HEXAMETHYLENE DIAMINE SALTS OF THE ACID OF FORMULA (I) 10-40% BY WEIGHT.
Claim 2
Dependent Claim
77 words
A SOLID COPOLYAMIDE CONSISTING ESSENTIALLY OF RECURRING UNITS OF CAPROLACTAM, LAURICLACTAM, HEXAMETHYLENE DIAMINE ADIPATE AND A HEXAMETHYLENE DIAMINE SALT OF AN ALIPHATIC DICARBOXYLIC ACID OF THE FORMULA HOOC-(CH2)N-COOH IN WHICH N IS THE NUMBER 7,8, 10 OR 11, SAID UNITS BEING INCORPORATED IN THE COPOLYAMIDE BY POLYMERISATION IN THE FOLLOWING PROPORTIONS: CAPROLACTAM 25-35% BY WEIGHT LAURICLACTAM 20-40% BY WEIGHT HEXAMETHYLENE DIAMINE ADIPATE 8-25% BY WEIGHT HEXAMETHYLENE DIAMINE SALTS OF THE ACID OF FORMULA (I) 10-40% BY WEIGHT.
Claim 3
Dependent Claim
20 words
The copolyamide according to claim 1, wherein said units are incorporated in the copolyamide by polymerisation in the following proportions:
Claim 4
Dependent Claim
34 words
The copolyamide according to claim 1, wherein the hexamethylene diamine salt of the dicarboxylic acid of formula (I) is incorPorated in the copolyamide in a quantity of from 20 to 30 percent by weight.
Claim 5
Dependent Claim
17 words
The copolyamide according to claim 1, in which n in formula (I) is 7, 8 or 10.
Claim 6
Dependent Claim
18 words
The copolyamide according to claim 4, wherein n in formula (I) stands for the number 7 or 8.
Claim 7
Dependent Claim
60 words
A process for the production of powdery copolyamides consisting essentially of recurring units of caprolactam, lauriclactam, hexamethylene diamine adipate and a hexamethylene diamine salt of an aliphatic dicarboxylic acid corresponding to the formula HOOC-(CH2)n-COOH in which n is 7, 8, 10 or 11, comprising the step of polymerizing said units under pressure at elevated temperature in the following quantitative proportions:
Claim 8
Dependent Claim
60 words
A process for the production of powdery copolyamides consisting essentially of recurring units of caprolactam, lauriclactam, hexamethylene diamine adipate and a hexamethylene diamine salt of an aliphatic dicarboxylic acid corresponding to the formula HOOC-(CH2)n-COOH in which n is 7, 8, 10 or 11, comprising the step of polymerizing said units under pressure at elevated temperature in the following quantitative proportions:
Claim 9
Dependent Claim
17 words
The process according to claim 6, in which the units are polymerised in the following quantitative proportions:
Claim 10
Dependent Claim
35 words
The process according to claim 6, wherein the hexamethylene diamine salt of the dicarboxylic acid of formula (I) is incorporated in the polymerization step in a quantity of from 20 to 30 percent by weight.
Claim 11
Dependent Claim
16 words
The process according to claim 6, wherein n in formula (I) is 7, 8 or 10.
Claim 12
Dependent Claim
15 words
The process according to claim 9, wherein n in formula (I) is 7 or 8.
Claim 13
Dependent Claim
28 words
The process according to claim 6, wherein polymerisation is carried out at a temperature of from 280* to 300*C and under a pressure of 10 to 50 atms.
Claim 14
Dependent Claim
20 words
The process according to claim 6, wherein after-condensation is carried out for 1 to 3 hours at 250* to 300*C.
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) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |