Abstract: The present invention relates to a process of manufacturing high, very high, and ultra high molecular weight polymers comprising predominantly ethylene monomers. Ethylene is reacted in the presence of a catalyst system to produce a polymer having a viscosimetrically-determined molecular weight of at least 0.7×106 g/mol. The catalyst system generally includes a bridged metallocene catalyst compound, optionally with a co-catalyst. The catalyst is characterized by a zirconium dichloride central functionality and a dimethyl silandiyl bridge between five-membered rings of indenyl groups. Both rings of the metallocene compound are substituted at the 2-position with respect to the dimethyl silandiyl bridge with a C1-C20 carbonaceous group.

Abstract: The present invention relates to a process of manufacturing high, very high, and ultra high molecular weight polymers comprising predominantly ethylene monomers. Ethylene is reacted in the presence of a catalyst system to produce a polymer having a viscosimetrically-determined molecular weight of at least 0.7×106 g/mol. The catalyst system generally includes a bridged metallocene catalyst compound, optionally with a co-catalyst. The catalyst is characterized by a zirconium dichloride central functionality and a dimethyl silandiyl bridge between five-membered rings of indenyl groups. Both rings of the metallocene compound are substituted at the 2-position with respect to the dimethyl silandiyl bridge with a C1-C20 carbonaceous group.

Abstract: The present invention relates to a process for manufacturing ultra high molecular weight polymers by means of polymerization and co-polymerization of olefins using novel bridged metallocene catalysts as well as their catalyst systems.

Abstract: The invention relates to hydrogels containing polyvinyl alcohols and/or polyvinyl alcohol copolymers having special geometries, methods for the production of said hydrogels, and the use of the hydrogels as materials in the biomedical and pharmaceutical field, for producing contact lenses, for the controlled release of active substances, as a carrier material for inclusion-immobilized biocatalysts, a carrier material for transition metal catalysts, a material for producing reactive membranes, an additive to drilling fluid, a displacing agent in oil recovery, a cement additive and an additive to highly viscous liquids such as crude oil to improve the flowability and increase the speed of conveyance, and a component of cosmetic products.

Abstract: The present invention relates to novel polymers, which are based on poly(vinyl ester) copolymers and poly(vinyl alcohol) copolymers having excellent thermal properties because of their special composition and to the use of said polymers. The poly(vinyl alcohol-polyalkene) copolymers and polymer mixtures obtained in this way are characterized by a strongly modified melting behavior compared to linear poly(vinyl alcohols).

Abstract: The present invention relates to new polyvinyl polymers, to initiator systems for preparing them, to a process for preparing the polymers, and also to their use as an adhesive component, emulsifier, detergent, lubricant, coating component, for electrically insulating magnetic wires, for producing laminated glass sheets, as an adhesive primer, for textile coatings, as an additive for motor fuels, engine oils, concrete, and in papermaking, for producing water-soluble films and for preparing biodegradable and water-soluble polymers.

Abstract: The present invention relates to a process for manufacturing ultra high molecular weight polymers by means of polymerization and co-polymerization of olefins using novel bridged metallocene catalysts as well as their catalyst systems.

Abstract: The present invention relates to polyvinyl alcohols, to polyvinyl alcohol copolymers having specific geometries, to a process for preparing such polyvinyl alcohols and polyvinyl alcohol copolymers, and to their use.

Abstract: The invention relates to a method for producing special transition metal compounds, to novel transition metal compounds and to the use thereof for polymerizing olefins.

Abstract: The present invention relates to polymers having specific geometries based on polyvinyl esters, to initiator systems for their preparation and to a process for preparing polymers which have specific geometries and are based on polyvinyl esters.

Abstract: The present invention relates to a process for preparing specific transition metal compounds, novel transition metal compounds and also catalyst systems and their use for the homo- or copolymerization of olefins.

Abstract: The present invention relates to a process for preparing specific transition metal compounds, novel transition metal compounds and also catalyst systems and their use for the homo- or copolymerization of olefins.

Abstract: The invention relates to a method for producing special transition metal compounds, to novel transition metal compounds and to the use thereof for polymerizing olefins.