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AssigneeAusimont S.p.A.
InventorsVincenzo Arcella, Giulio Brinati, Margherita Albano, Vito Tortelli
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New fluoroelastomers are described, comprising monomeric units deriving from a bis-olefin having general formula: ##STR1## wherein: R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, equal or different from each other, are H or alkyls C.sub.1 -C.sub.5 ; Z is an alkylene or cycloalkylene radical C.sub.1 -C.sub.18, linear or branched, optionally containing oxygen atoms, preferably at least partially fluorinated, or a (per)fluoropolyoxyalkylene radical. Such products are endowed with improved processability, especially during calendering of the vulcanization mixture, along with superior mechanical and workability properties during extrusion and injection molding, with a very good mold release.
A peroxide vulcanizable fluoroelastomer containing iodine and/or bromine atoms in the chain and/or in the terminal positions to the macromolecules and comprising between, about 0.01, and 1.0, moles of monomeric units derived from a bis-olefin per 100 moles of other base monomeric units, said monomeric units derived from a bis-olefin having the formula:
A fluoroelastomer vulcanizable by ionic and/or peroxidic systems comprising between about 0.01 and 1.0 moles of monomeric units derived from a bis-olefin per 100 moles of other base monomeric units, with the monomeric units derived from a bis-olefin having the formula:
Dependencies are inferred from the claim text.