Fluoroelastomers substantially free from polar terminals and rel

Details Fluoroelastomers substantially free from polar terminals and rel Fluoroelastomers substantially free from polar terminals and rel

1997-08-04

1998-12-22

Lipman, Bernard

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526206, C08F 1624

Patent

active

058521496

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.

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