| 摘要 |
VDF curable fluoroelastomers, ionically cured, having a compression set after a time of 24 h (ASTM D 395/B) at-10°C lower than 60%, preferably lower than 50% and at-25°C lower than 90%, preferably lower than 75%, comprising hexafluoropropene (HFP) in amounts higher than 10% by moles and one vinylether of formula: CF2=CFOCF2OCF3 (a), an amount of-COF end groups in the polymer lower than the sensitivity limit of the method using the FT-IR spectroscopy described in the present application.
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