Preparation of polyethylene 1 2-diphenoxyethane -4 4'-dicarboxylate using strontium calcium and barium compounds as an ester interchange catalyst and antimony compound as a polymerization catalyst
Abstract
Abstract THIS INVENTION DISCLOSES A PROCESS FOR THE PREPARATION OF POLYETHYLENE 1,2-DIPHENOXYETHANE-4,4''-DICARBOXYLATE WHICH COMPRISES ESTER INTERCHANGING 1,2-BIS (P-CARBOMETHOXYPHENOXY) ETHANE AND ETHYLENE GLYCOL IN THE PRESENCE OF A STRONTIUM, CALCIUM OR BARIUM SALT OF A MONOCARBOXYLIC ACID HAVING 2 TO 5 CARBON ATOMS OR AN ORTHOBORATE UNTIL METHANOL NO LONGER EVLOVES, AND SUBSEQUENTLY POLYCONDENSING THE RESULTING ESTER INTERCHANGE REACTION PRODUCT IN THE PRESENCE OF AN ANTIMONY COMPOUND. THEREBY THERE CAN BE OBTAINED A POYETHYLENE 1,2-DIPHENOXYETHANE-4,4H-DICARBOXYLATE HAVING A REMARKEDLY HIGH CRYSTALLIZATION VELOCITY. AS COMPARED WITH THE CONVENTIONALLY PREPARED ONE THE POLETHYLENE 1,2- DIPHENOXYETHANE-4,4''-DICARBOXYLATE THUS OBTAINED IS USEFUL PARTICULARLY AS A MATERIAL FOR MANUFACTURING SYNTHETIC FIBERS WHICH ARE EXCELLANT IN TENACITY, ELONGATIN AND YOUNG''S MODULUS.
Inventors
- 👤 Hidehiko Kobayashi
- 👤 Hiroshi Komoto
Bibliographic Details
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