Bayer Aktiengesellschaft

Basell Polyolefine Gmbh

Other

Basf Aktiengesellschaft

Hoechst Aktiengesellschaft

Walter Heitz

Ludwig Bottenbruch

Rudolf Binsack

Leo Morbitzer

Wolfgang Koch

Karl-Heinz Kohler

Andreas Greiner

Wilhelm Risse

Ulrich R Grigo

Karsten J Idel

Edgar Ostlinning

Josef Merten

Peter Strohriegl

Markus Schopf

Jennifer Kiepke

Konstantin A Rufanov

Uwe Peucker

Manfred Spies

Joerg Sundermeyer

Peter Ball

Dieter Freitag

Reinhold Schwalm

Hans-Werner Schmidt

Hans-Jurgen Kress

Hans-Rudolf Dicke

Thomas Heitz

Ludwig Trabert

Wolfgang Stix

Norbert Hampp

Uwe Kampschulte

Karl-Heinrich Schneider

Wilhelm Brugging

Arno Knebelkamp

Lutz Hesse

Ralf Richter

Alexander Gl Uck

The present invention relates to catalyst system containing at least one imidochrome compound and at least one activation compound. This invention also relates to imidochrome compounds, to a method for olefin polymerization and to methods for producing said imidochrome compounds.

Imidochromium compounds in catalyst systems for olefin polymerization

An ophthalmologic implant for the prophylaxis or treatment of capsule opacification after implantation and completion of wound healing of a synthetic lens is described. This treatment can be repeated if necessary.

Ophthalmologic implant

Imidochromium compounds contained in catalyst systems for olefin polymerization

Polyaryl ether ketones are prepared by electrophilic polycondensation using acyl halides as monomer components in the presence of a Lewis acid, by a process in which from 0.001 to 60% by weight of an inert filler or of a component which can be converted into an inert filler during working up are added to the reaction mixture before or during the polycondensation.

Amphoteric metal oxides as cocatalyst in the electrophilic synthesis of

Process for the preparation of .alpha.-flurostyrene

Vinylene copolymers composed of recurrent structural units of formula I ##STR1## wherein Ar denotes an aromatic or heterocyclic group, R denotes an inert substituent and n stands for an integer with a value from 0-8 and processes for their preparation.

Polymerization of halo aryl olefin

The invention relates to a process for the production of poly-(1,4-benzamide) in admixture with SiO.sub.2 by polycondensation of 4-aminobenzoic acid in the presence of SiCl.sub.4 in 1,3-dimethyltetrahydro-2(1H)-pyrimidinone in the presence of salts, such as lithium chloride or calcium chloride.

Process for the production of SiO.sub.2 containing polybenzamides

Vinylene copolymers composed of recurrent structural units of formula I ##STR1## wherein Ar denotes an aromatic or heterocyclic group, R denotes an inert substitutent and n stands for an integer with a value from 0-8 and processes for their preparation.

Catalytic/solvent preparation of vinylene copolymers from ethylene and

Vinylene copolymer

This invention relates to new aromatic polyesters based on substituted 4,4'-biphenyl dicarboxylic acids and substituted hydroquinones, to a process for their preparation from hydroquinone derivatives and terephthalic acid and to their use for the preparation of molecularly reinforced polymers.

Aromatic polyester from substituted hydroquinone and biphenyl

This invention relates to polyphenylene oxides with high molecular weight (PPO) and to a process for their preparation by the reaction of polybasic aromatic carboxylic acids or their derivatives with polyphenylene oxides, and their use for the modification of plastics.

Polyphenylene oxides with high molecular weight and a process for their

This invention relates to polyesters corresponding to formula (I) ##STR1## wherein R.sup.1 and R.sup.2 stand for --CH.sub.2 --CH.sub.2 --Ar wherein Ar denotes an aromatic group or one of these two groups is --CH.sub.2 --CH.sub.2 --Ar while the other is an alkyl group, a substituted alkyl or an aryl group or halogen and

Substituted aromatic polyesters

The invention relates to block copolymers of optionally substituted poly(oxy-1,4-phenylene) segments and liquid crystalline segments.

Block copolymers of optionally substituted poly(oxy-1,4-phenylene)

A process for preparing oligomers and telechels of poly(carboxy-piperazine) and new oligomers the telechels of poly(carboxy-piperazine), wherein the process involves condensation of piperazine or piperazine-N-carboxylic acid esters or their reaction with piperazine or piperidine derivatives to form an intermediate which is reacted with diphenyl carbonate in the presence of a tertiary amine.

Process for preparing oligomers and telechels having carboxy-piperazine

The invention relates to new aromatic polyesters based on terephthalic acid and hydroquinones, processes for their preparation from hydroquinone and terephthalic acid derivatives, and their use for the preparation of molecularly reinforced polymers.

Aromatic polyesters, processes for their preparation, and their use for

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Kirchhain, Germany

Walter Heitz