Fluoroelastomers substantially free from polar terminals and related preparation process
AssigneeAusimont S.p.A.
InventorsJulio A. Abusleme, Margherita Albano
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Abstract
Fluoroelastomers substantially free from polar end groups, comprising vinylidene fluoride (VDF) and/or tetrafluoroethylene (TFE) and at least another fluorinated ethylenically unsaturated monomer. They are characterized by an high thermal stability, an optimal processability and curing easiness, without giving rise to pre-crosslinking phenomena and moreover they do not require prolonged post-curing treatments. Such flurooelastomers are advantageously prepared by copolymerization of the corresponding monomers in aqueous emulsion in the presence of ultraviolet-visible radiation (UV-VIS) and of an organic peroxide.
Claims18
A fluoroelastomer comprising vinylidene fluoride (VDF) and/or tetrafluoroethylene (TFE) and at least another fluorinated monomer ethylenically unsaturated, said fluoroelastomer having polar terminal groups in an amount of less than 3% by moles with respect to the total amount of terminal groups.
Dependencies are inferred from the claim text.