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AssigneeDsm IP Assets B.V.
InventorsEllen Van Hemelrijck, Wilhelmus Petrus Johannes Appel
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A thermoplastic elastomer contains (a) hard segments of a polyester and (b) soft segments containing repeating units derived from an aliphatic carbonate, wherein the thermoplastic elastomer exhibits a melt flow index (MFI) measured at 230° C. under a load of 10 kg (MFI 230° C./10 kg) according to ISO1133 (2011) of at most 40 g/10 min. The thermoplastic elastomer is produced by subjecting a precursor of the thermoplastic elastomer to solid state post reaction processing at a temperature between 140 and 170° C. until the thermoplastic elastomer has the required MFI of at most 40 g/10 min measured at 230° C. under a load of 10 kg (MFI 230° C./10 kg) according to ISO1133 (2011).
A process for the production of a thermoplastic elastomer containing (a) hard segments of a polyester and (b) soft segments comprising repeating units derived from an aliphatic carbonate, wherein the process comprises subjecting a precursor thermoplastic elastomer to solid state post-reaction processing at a temperature between 140 and 170° C. until the thermoplastic elastomer has a melt flow index (MFI) measured at 230° C. under a load of 10 kg (MFI 230° C./10 kg), according to ISO1133 (2011) of at most 40 g/10 min.
A thermoplastic elastomer comprising:
Dependencies are inferred from the claim text.