Bayer Aktiengesellschaft

Ralf Kruger

Albrecht Marhold

Karl-Erwin Piejko

Michael Negele

David Bryan Harrison

Dieter Wrobel

Leo Morbitzer

Gerhard Langstein

Norbert Lui

Helmut Steinberger

Holger Lutjens

Ulrich Eisele

Jurgen Ackermann

Wilhelm-Franz Biener

Nikolay Vladimirovich Veretennikov

Mark Peysakhovich Greenblat

Sergey Vasilyevich Sokolov

Alexandr Nikolaevich Kollar

Tatyana Alexandrovna Filchakova

The present invention therefore provides a new process for the preparation of low-viscosity fluorinated rubbers, in which at least one fluorine monomer is polymerized by free radicals in the presence of one or more compounds of the formula (I) or (II) ##STR1## wherein R.sup.1 represents a fluorine atom or a perfluoroalkyl radical having 1 to 4 carbon atoms and R.sup.2 represents a perfluoroalkyl radical having 1 to 4 carbon atoms and n=4 or 5, and, optionally, a molecular weight regulator.

Process for the preparation of low-viscosity fluorinated rubbers

The present invention relates to a new fluororubber, a process for its production and its use, as well as a process for producing fluororubber mouldings and/or coatings.

Fluororubber, a process for its production and its use, as well as a

A reactive and processable fluoropolymer, obtainable by mechanical shearing of

Preparation and use of reactive and processable fluoropolymers

The present invention relates to peroxide crosslinkable fluororubbers prepared from polymerized units of vinylidene fluoride, at least one fluorinated propene and/or a fluorinated methyl vinyl ether, at least one perfluoro(polyoxaalkyl vinyl ether), optionally tetrafluoroethylene and crosslinking-active reactive sites, to a process for the production thereof and to the use thereof.

Peroxide crosslinkable fluororubbers, a process for the production

Peroxide curable fluororubbers, which contain no cure-site units in addition to the fluoromonomers forming the polymer chain, and a process for their production.

Peroxide curable fluororubbers containing no cure-site monomers

Methyleneperfluorocycloalkanes and their use in the production of

Thermoplastic fluoroelastomer graft polymers formed from a fluorine-containing graft polymer formed from a rubber like (Tg&lt;0.degree. C.), uncrosslinked fluorine-containing copolymer containing double bonds as the graft base onto which is grafted a fluorine-containing monomer that gives an at least partly crystalline polymer are produced from the rubber-like uncrosslinked copolymer by radical polymerization in solution, suspension or emulsion under elevated pressure at about -15.degree. to +120.degree. C., and grafting thereon a monomer which forms an at least partly crystalline polymer the grafting onto the rubber-like copolymer taking place by radical solution, suspension or emulsion graft polymerization under elevated pressure at about -15.degree. to +120.degree. C.

Thermoplastic fluoroelastomers produced by graft copolymerization

Thermoplastic fluorocopolymers and the fluoromonomers used for their

A 2-allyl-perfluoroalkyl-trifluorovinyl ether of the formula ##STR1## wherein R.sup.1.sub.F and R.sup.2.sub.F represent either --CF.sub.3 or, together, (CF.sub.2).sub.n where n=2 or 3, is produced by

Copolymerizable fluorinated compounds, a process for their preparation

A 2-allyl-perfluoroalkyl-trifluorovinyl ether of the formula ##STR1## wherein R.sup.1.sub.F and R.sup.2.sub.F represent either --CF.sub.3 or, together, (CF.sub.2).sub.n where n=2 or 3.

The title compounds contain one or more fluorinated monomers and alkenyl isocyanurates and/or alkenyl cyanurates of the formulae ##STR1## wherein R.sup.1, R.sup.2, R.sup.4 and R.sup.5 independently of one another denote C.sub.3 -C.sub.6 -alkenyl having a terminal double bond and

Non-crosslinked polymers, containing reactive double bonds, of

Copolymers of fluoroethylenes and masked phenols of the formula ##STR1## wherein R.sup.1 is H, C.sub.1 -C.sub.4 -alkyl, which may be further ring substituted and in which X is OY or ##STR2## Y is Si(R.sup.3).sub.3, ##STR3## R.sup.3 is alkyl, cycloalkyl or aryl.

Preparation of fluoropolymers containing masked phenol groups

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

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Bergisch Gladbach, Germany

Ralf Kruger