US3957733A
Expired / Lapsed
US
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C19 Diacid trimethylhexamethylene diamine polyamides
Assignee: General Mills Chemicals Inc
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Filing: 1974-05-28
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Granted: 1976-05-18
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Expires: 1994-05-28
Abstract
Abstract Polyamides of a C 19 diacid and trimethylhexamethylene diamine useful as an engineering plastic.
Inventors
- 👤 Edgar R. Rogier
- 👤 Allen H. Jevne
- 👤 Gerald L. Schwebke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:00
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/26
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
22 words
A polyamide resin consisting essentially of the amidification product of a mixture of isomers of heptadecane dicarboxylic acid having the formula: ##EQU4##
Claim 2
Dependent Claim
22 words
A polyamide resin consisting essentially of the amidification product of a mixture of isomers of heptadecane dicarboxylic acid having the formula: ##EQU4##
Claim 3
Dependent Claim
87 words
wherein x is an integer from 1 to 15, y is an integer from 1 to 15 and the sum of x and y is 16, and trimethylhexamethylene diamine, wherein the equivalents of the dicarboxylic acid and the trimethylhexamethylene diamine are substantially equal, wherein the amidification reaction is conducted at a temperature between about 100°C. and 300°C., and wherein the amidification product has a logarithmic viscosity number of about 30 to 150 measured in orthochlorophenol at a concentration of 0.005 g./ml. and at a temperature of 30°C.
Claim 4
Dependent Claim
87 words
wherein x is an integer from 1 to 15, y is an integer from 1 to 15 and the sum of x and y is 16, and trimethylhexamethylene diamine, wherein the equivalents of the dicarboxylic acid and the trimethylhexamethylene diamine are substantially equal, wherein the amidification reaction is conducted at a temperature between about 100°C. and 300°C., and wherein the amidification product has a logarithmic viscosity number of about 30 to 150 measured in orthochlorophenol at a concentration of 0.005 g./ml. and at a temperature of 30°C.
Claim 5
Dependent Claim
15 words
The polyamide of claim 1 wherein the logarithmic viscosity number is about 40 to 120.
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) | 1979-05-18 | 1979-11-17 | 1980-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-18 | 1983-11-17 | 1984-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-18 | 1987-11-17 | 1988-05-18 | $7700.00 | Window Closed / Lapsed |