Hoechst Aktiengesellschaft

Ticona Gmbh

Other

Targor Gmbh

Hoechst Research & Technology Deutschland Gmbh & Co. Kg

Mitsui Petrochemical Ind. Ltd.

Freddy Helmer-Metzmann

Arnold Schneller

Frank Osan

Helmut Ritter

Alexandra Jacobs

Ralf Thorwirth

Roland Nolte

Konstantin Ledjeff

Karl-Heinz Tetzlaff

Rudiger Walz

Frank Kuber

Oskar Nuyken

Andreas Schleicher

Michael-Joachim Brekner

Michael Aulbach

Wilfried Hatke

Michael Riedel

Reinhard Wagener

Otto Herrmann-Schonherr

Helmut Witteler

Otto Hermann-Schonherr

Uwe Kampschulte

Gerhard Maier

Dazhong Yang

The present invention relates to an absorbent comprising at least one cycloolefin copolymer which contains polymerized units which are derived from at least one cyclic and at least one acyclic olefin.

Method for absorbing contaminants

Polymer foams

In order to produce a polymer electrolyte membrane from sulfonated, aromatic polyether ketone, an aromatic polyether ketone of the formula (I)

Polymer electrolyte membrane and process for the production thereof

Absorbents

Polymer electrolytes and process for their production

The present invention relates to a stereorigid metallocene compound having as ligands at least two substituted or unsubstituted cyclopentadienyl groups which are connected to one another via a five-membered ring, where at least one cyclopentadienyl group is fused onto the five-membered ring and the ligand system of the stereorigid metallocene compound is different from 4-[.eta..sup.5 -3'-alkylcyclopentadienyl)-4,6,6-trimethyl-(.eta..sup.5 -2-alkyl-4,5-tetrahydropentalene]. The metallocene compound of the invention is suitable as a catalyst component for olefin polymerization.

Stereorigid metallocene compound

In the electrochemical cell comprising a housing in which two diffusion electrodes are arranged which contain active catalyst particles and at whose rears in each case a contiguous compartment for a gas is provided, a compartment for a liquid electrolyte being provided between the diffusion electrodes, there is arranged, between the diffusion electrodes, at least one anion exchanger membrane directly in front of one of the diffusion electrodes.

Electrochemical cell

Homogeneous polymer alloys comprising, as the main constituents, sulfonated aromatic polyether-ketones and at least one aromatic polysulfone, wherein the materials have a good thermal and mechanical stability and are thereby distinguished in particular as cation exchanger membranes for electrochemical cells with operating temperatures above 100.degree. C.

Homogeneous polymer alloys based on sulfonated aromatic polyetherkeytones

In order to produce a polymer electrolyte membrane from sulfonated, aromatic polyether ketone, an aromatic polyether ketone of the formula (I) ##STR1## in which Ar is a phenylene ring having p- and/or m-bonds,

Polymer electrolyte membrane for use in fuel cells and electrolysis cells

In the electrochemical cell comprising a housing in which two diffusion electrodes are arranged which contain active catalyst particles and at whose rears in each case a contiguous compartment for a gas is provided, a compartment for a liquid electrolyte being provided between the diffusion electrodes, there is arranged, between the diffusion electrodes, at least one ion exchanger membrane directly in front of one of the diffusion electrodes.

In order to produce a polymer electrolyte membrane from sulfonated, aromatic polyether ketone, an aromatic polyether ketone of the formula (I) ##STR1## in which Ar is a phenylene ring having p- and/or m-bonds, Ar' is a phenylene, naphthylene, biphenylene, anthrylene or another divalent aromatic unit, X, N and M, independently of one another are 0 or 1, Y is 0, 1, 2 or 3, P is 1, 2, 3 or 4, is sulfonated and the sulfonic acid is isolated. At least 5% of the sulfonic groups in the sulfonic acid are converted into sulfonyl chloride groups, and these are reacted with an amine containing at least one crosslinkable substituent or a further functional group, and unreacted sulfonyl chloride groups are subsequently hydrolyzed. The resultant aromatic sulfonamide is isolated and dissolved in an organic solvent, the solution is converted into a film, and the crosslinkable substituents in the film are then crosslinked. In specific cases, the crosslinkable substituents can be omitted. In this case, sulfonated polyether ketone is converted into a film from solution.

Polymer electrolyte membrane, and process for the production thereof

Homogeneous polymer alloys based on sulfonated, aromatic polyether ketones Homogeneous polymer alloys comprising sulfonated, aromatic polyether ketones and at least one polyamide as the main constituents, wherein the polyamide is a completely aromatic polyamide.

Homogeneous polymer alloys based on sulfonated aromatic polyether ketones

Semipermeable membranes of homogeneously miscible polymer alloys and a process for their preparation. In particular, semipermeable membranes of homogeneous polymer alloys which contain sulfonated, aromatic polyether ketones and at least one polyamide as the main constituents, wherein the polyamide is a completely aromatic polyamide.

Semipermeable membranes of homogeneously miscible polymer alloys

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Mainz, Germany

Freddy Helmer-Metzmann