C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 63/682 (2006.01) C08G 63/672 (2006.01)
Patent
CA 2122738
ABSTRACT THERMOPLASTIC POLYESTERS CONTAINING PERFLUOROPOLYOXYALKYLENE SEQUENCES. Fluorinated thermoplastic elastomers having a block structure: -[-Rf-H1-H2-H1-]- where -Rf- is a perfluoropolyoxyalkylene sequence of formula: -CF2O-(CF2CF2O)m-(CF2O)n-CF2- with m/n = 0.2 + 5, H1 and H2, equal or different from each other, are bivalent radicals having arylene, alkylarylene, alkylene or cycloalkylene structure, optionally containing fluorine and/or other heteroatoms selected among oxygen, sulphur, nitrogen. Such products are obtainable by utilizing a perfluoropoly- oxyalkylene diol having a functionality at least equal to 1.97, preferably at least equal to 1.99, and are characterized by a tensile strength at 23°C at least 50% higher than that of the corresponding polyesters obtained starting from perfluoropolyoxyalkylene diols having a functionality not higher than 1.96.
Gianotti Giuseppe
Levi Marinella
Tonelli Claudio
Turri Stefano
Ausimont S.p.a.
Oyen Wiggs Green & Mutala
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