Segmented thermoplastic copolyesters
Abstract
Abstract SEGMENTED THERMOPLASTIC COPOLYESTERS CONTAINING RECURRING LONG CHAIN ESTER UNTIS DERIVED FROM DICARBOXYLIC ACIDS AND POLY(ALKYLENE OXIDE) GLYCOL HAVING A MOLECULAR WEIGHT OF ABOUT 400-3500 AND A CARBON TO OXYGEN RATIO OF ABOUT 2.0-2.4 AND SHORT CHAIN ESTER UNITS DERIVED FROM DICARBOXYLIC ACIDS AND LOW MOLECULAR WEIGHT DIOLS. AT LEAST 70% OF THE DICARBOXYLIC ACID USED IS TEREPHALTIC ACID AND AT LEAST 70% OF THE LOW MOLECULAR WEIGHT DIOL IS 1,4-BUTANEDIOL. THE SHORT CHAIN ESTER UNITS CONSTITUTE ABOUT 25-65% BY WEIGHT OF THE POLYMER. SUCH COPOLYESTERS RAPIDLY HARDEN FROM THE MOLTEN STATE AND HAVE OUTSTANDING PHYSICAL PROPERTIES OVER A WIDE RANGE OF TEMPERATURES AND ARE ESPECIALLY RESISTANT TO OIL SWELL.
Inventors
- 👤 G Hoeschele
Bibliographic Details
Claims Analysis
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