Phosphorous acid and ester catalyzed formation of aminediol modified polyesters
Abstract
Abstract IN WHICH R1 AND R2 ARE EACH AS DEFINED ABOVE AND P AND Q ARE EACH ZERO OR A POSITIVE INTEGER NOT MORE THAN 10, AN IMPROVED PROCESS WHICH IS CHARACTERIZED IN THAT THE REACTION IS CARRIED OUT IN THE PRESENCE OF AT LEAST ONE OF PHOSPHOROUS ACID COMPOUNDS AND HYPOPHOSPHOROUS ACID, WHEREBY (1) THE RATE OF POLYMERIZATION IS ELEVATED, (2) THE SUBLIMATION OF THE STARTING CARBOXYLIC ACID IS PREVENTED, (3) THE MOLECULAR WEIGHT OF THE POLYESTER IS INCREASED AND (4) THE POLYESTER OBTAINED IS COLORLESS AND TRANSPARENT. -CH2-N(-R1)-R2 WHEREIN R1 AND R2 ARE EACH A LOWER ALKYL GROUP OR, WHEN TAKEN TOGETHER, THEY REPRESENT A LOWER ALKYLENE GROUP, R3 IS A LOWER ALKYL GROUP OR A GROUP OF THE FORMULA: CH2-O)Q-H H-(O-CH2-CH2)P-O-CH2-C(-R3)(-CH2-N(-R1)-R2)-CH2-O-(CH2- IN THE PRODUCTION OF A POLYESTER IMPROVED IN DYEABILITY WITH ACID DYES BY THE REACTION BETWEEN A CARBOXYLIC ACID AND A GLYCOL OF WHICH THE WHOLE OR PART IS THE ONE REPRESENTED BY THE FORMULA:
Inventors
- 👤 H Munakata
- 👤 K Watanabe
- 👤 Y Arimatsu
- 👤 M Tanaka
Bibliographic Details
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