C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
402/193, 400/201
C08G 63/16 (2006.01) C08G 63/20 (2006.01) C08G 63/46 (2006.01)
Patent
CA 1040781
Serial No. 215,483 E.I. du Pont de Nemours and Company (Hoeschele, Guenther K.) ABSTRACT OF THE DISCLOSURE Segmented thermoplastic copolyester elastomers containing recurring polymeric long chain ester units derived from dimer acid and low molecular weight glycols and short chain ester units derived from dicarboxylic acids and low molecular weight glycols. At least 70% of the dicarboxylic acid used is terephthalic acid and at least 70% of the low molecular weight glycol is 1,4-butanediol. The short chain ester units constitute about 25-95% by weight of the polymer. Such copolyesters rapidly harden from the molten state and have outstanding resistance toward heat aging and photodegradation. Such copolyesters can be injection, compression, transfer and blow molded to form elastic molded articles e.g. tires and can be readily extruded to produce, for example, films, tubing and other forms having complicated cross sections.
215483
E.i. Du Pont de Nemours And Company
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