Claims
- 1. In a process for preparing an essentially linear, dipolar aprotic solvent soluble solid polyamide by the condensation of an organic diisocyanate with a compound containing two carboxylic acid groups in said solvent, the improvement which comprises carrying out said process in the presence of a catalytic amount of a compound MOR, wherein R represents alkyl or aryl, and M is an alkali metal.
- 2. The process according to claim 1 wherein the solvent comprises a dipolar aprotic solvent.
- 3. The process according to claim 1 wherein the catalyst is lithium phenoxide.
- 4. The process according to claim 1 wherein the catalyst is lithium methoxide.
- 5. The process according to claim 1 wherein the catalyst is sodium methoxide.
- 6. The process according to claim 1 wherein the polycarboxylic acid derivative comprises an aromatic dicarboxylic acid.
- 7. The process according to claim 1 wherein the polycarboxylic acid derivative comprises an aliphatic dicarboxylic acid.
- 8. In a process for preparing an essentially linear, dipolar aprotic solvent soluble solid polyamide by the condensation of an organic diisocyanate with a compound containing two carboxylic acid groups in said solvent, the improvement which comprises carrying out said process in the presence of a catalytic amount of a compound MOR, wherein R represents alkyl, and M is an alkali metal.
- 9. The process according to claim 8 wherein the polycarboxylic acid derivative is isopahalic acid.
- 10. The process according to claim 8 wherein the polycarboxylic acid derivative is brassylic acid.
CROSS REFERENCE TO RELATED APPLICATION
This application is a division of copending application Ser. No. 521,744 filed Nov. 7, 1974, now U.S. Pat. No. 4,001,186.
US Referenced Citations (11)
Divisions (1)
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Number |
Date |
Country |
Parent |
521744 |
Nov 1974 |
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