Uncrosslinked copolymers containing reactive double bonds of fluorine monomers and unconjugated dienes and a process for their production

US5214115A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Gerhard Langstein · Kürten, DE
• Ralf Kruger · Bensberg, DE
• Karl-Erwin Piejko · Bensberg, DE

Key dates

• Filing date: Apr 28, 1992
• Grant date: May 25, 1993
• Expiry date: Apr 28, 2012

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F214/186
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

An uncrosslinked copolymer of comonomers (a), (b) and (c) and containing reactive double bonds, the comonomers based on the total mols of (a), (b) and (c) comprising PA0 (a) 45 to 99.9 mol-% of at least one ethylene containing 1 to 4 fluorine atoms, PA0 (b) 0 to 54.9 mol-% of at least one comonomer selected from the group consisting of PA1 (b1) a linear or branched C.sub.3-8 alkene containing at least one fluorine atom, PA1 (b2) an alkyl vinyl ether containing at least one fluorine atom, PA1 (b3) an open-chain or cyclic C.sub.3-6 ketone containing fluorinated .alpha.,.alpha.'-positions and PA1 (b4) non-fluorinated C.sub.2-4 alkene, C.sub.3-6 alkyl vinyl ether or C.sub.4-6 vinyl ester, and PA0 (c) 0.1 to 5 mol-% of at least one unconjugated diene. They are produced by radical polymerization. Because of the absence of bromine and/or iodine, during subsequent peroxidic cross-linking no toxic alkyl bromide and/or iodide is released.