Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: The present invention relates to foams comprising cycloolefin copolymers. The foam of the invention comprises at least one cycloolefin copolymer which comprises from 0.1 to 100% by weight, based on the total mass of the cycloolefin copolymer, of polymerized units derived from one or more polycyclic olefins having one or more norbornene units and from 0 to 99% by weight, based on the total mass of the cycloolefin copolymer, of polymerized units derived from one or more acyclic olefins of the formula  where Ri, Rii, Riii and Riv are identical or different and are each a hydrogen atom, a linear, branched, saturated or unsaturated C1-C20-hydrocarbon radical or a C6-C18-aryl radical and from 0 to 99% by weight, based on the total mass of the cycloolefin copolymer, of polymerized units of one or more monocyclic olefins of the formula VIII  where n is a number from 2 to 10, and voids which can contain one or more gaseous substances.

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

Abstract: 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.

Abstract: The invention relates to a process for the chlorosulfonation of polyarylene sulfide in which the polyarylene sulfide is completely dissolved in chlorosulfonic acid at a temperature of -10 to +20 C., then agitated at reaction temperatures in the +5 to +20 C. range for a reaction time of 180 min at the most, possibly with the addition of oleum or acetic anhydride and the precipitated in an aqueous medium. The polyarylene sulfide is preferably poly-p-phenylene sulfide. The invention also relates to chlorosulfonated polyarylene sulfide produced by this process, which dissolves in a quantity of 10 to 50 wt % in N-methyl pyrrolidone and has a mean molecular weight Mw of >50,000 g/mol. Finally, the invention also relates to the use of chlorosulfonated polyarylene sulfide for the production of molding, foils, fibres or diaphragms with a proton conductivity in the 2 to 200 mS/cm range.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

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

Abstract: 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.

Abstract: 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.

Abstract: Polyether ketones and polyether sulfones based on phenylindane and the use thereof for optical systemsPolymeric ethers containing phenylindane units, of the formula ##STR1## in which X=CO or SO.sub.2,Y=a divalent heteroarylene radical or an arylene radical or a divalent group of two aryl radicals which are bonded to one another via a bridge,R.sup.1 =CH.sub.3 ; R.sup.2 =R.sup.3 =H, orR.sup.2 =CH.sub.3 ; R.sup.1 =R.sup.3 =(C.sub.1 to C.sub.16)-alkyl or aryl, orR.sup.1 =CH.sub.3 ; R.sub.3 =H; R.sup.2 =(C.sub.1 to C.sub.16)-alkyl or aryl,are transparent and are suitable for optical systems.

Abstract: Polymer electrolytes are described that comprise a sulfonated aromatic polyether ketone, e.g. of the formula II ##STR1## where A is from 0.2 to 1,c is from 0 to 0.8, anda+c=1.The polymer electrolytes are prepared by dissolving an aromatic polyether ketone in 94-97% by weight sulfuric acid and adding a sulfonating agent, e.g. oleum, to the solution until the sulfuric acid concentration is from 98 to 99.9% by weight.