Arlanxeo Deutschland Gmbh

Lanxess Deutschland Gmbh

Heike Kloppenburg

Alex Lucassen

Alicia Le-Sattler

Norbert Steinhauser

Thomas Gross

David Hardy

Dave Hardy

Yan Zhang

Paul Wagner

Hermann-Josef Weidenhaupt

Hanns-Ingolf Paul

Ulrich Feldhues

Rolf Feller

John Lovegrove

Melanie Wiedemeier-Jarad

Heinz Unterberg

Wolfgang Krumbe

Thomas Groβ

Judy Elizabeth Douglas

Dietmar Hoff

Michaela Meiers

Martin Siebuerger

Thomas Ruenzi

David John Hardy

Thomas Rünzi

Thomas Groß

Modified diene polymers containing heteroatoms are disclosed, as is their production, rubber mixtures comprising these modified diene rubbers, and to their use for the production of rubber vulcanizates, which serve, in particular, for the production of rubber moldings and the production of tires.

Heteroatom containing modified diene polymers

The invention relates to a process for determining the degree of branching of modified polymers wherein the polymers are modified in the sense that their degree of branching after polymerization was increased once more, wherein the modified polymers are treated with a polar transformation mixture comprising a compound of general formula (I)R&#x2014;S&#x2014;S&#x2014;R&#x2003;&#x2003; (I)wherein the Mooney viscosity (ML 1+4 at 100&#xb0; C.) of the polymers is determined before and after the treatment with the polar transformation mixture and the degree of branching is determined.

Determination of the degree of branching

Vulcanizable polymer compositions based on backbone-functionalized polydienes having the general formula (I): 

Functionalized polymer composition

The invention relates to neodymium-catalyzed polybutadienes (NdBR) comprising &#x3e;95 wt % of cis-1,4 units and &#x3c;1 wt % of 1,2-vinyl content, based on the neodymium-catalyzed polybutadiene, wherein the NdBR evinces a molar mass breakdown of not less than 25%.

NdBR with molar mass breakdown

The invention relates to vulcanizable rubber compositions comprising at least the following components:

Rubber composition

The invention relates to methods for achieving a step increase in the Mooney viscosity in production of high-molecular-weight polybutadiene having &#x3e;95% by weight content of cis-1,4 units and &#x3c;1% by weight 1,2-vinyl content, characterized in that

High-mooney NDBR having mooney jump

The invention relates to an NdBR wet masterbatch comprising &#x2014;neodymium-catalyzed polybutadienes having a high proportion of cis-1,4 units of &#x3e;95% and a low proportion of 1,2-vinyl content of &#x3c;1%, with narrow polydispersity of less than 3, with a Mooney viscosity (ML100&#xb0; C.) between 30 and 90 MU, with a high linearity index (ratio of solution viscosity to Mooney viscosity) of 3 to 10 m Pas/MU and with a Mooney relaxation after 30 seconds of 2 to 12%, the latter being prepared by means of solution polymerization, &#x2014;at least one carbon black, the carbon black having an iodine absorption number (ION) between 85 and 210 mg/g, measured to ASTM D1510-1304, and an oil absorption number (OAN) between 75 and 150 ml/100 g, measured to ASTM D2414, and &#x2014;an oil.

NdBR wet masterbatch

The invention relates to functionalized diene rubbers with trimethylolpropane and fatty acid, to a process for production there of and use thereof for the production of wet-skid-resistant and low-rolling-resistance motor-vehicle tire treads with high abrasion resistance.

Mixtures composed of functionalized diene rubbers with trimethylolpropane and fatty acid, a process for production thereof and use thereof

The invention relates to a high molecular weight bimodal neodymium-catalysed polybutadiene having a high proportion, &#x3e;95%, of cis-1,4 units and a low proportion, &#x3c;1%, of 1,2-vinyl content, wherein the polybutadiene has a linear polymeric main fraction and a long chain branched polymeric fraction, wherein the slope in the RGM relationship is &#x3e;0.5 for the polymeric main fraction and &#x3c;0.3 for the long chain branched polymeric fraction.

Bimodal neodymium-catalyzed polybutadiene

The invention relates to a high-molecular-weight, linear, neodymium-catalyzed polybutadiene having a high proportion, &#x3e;95%, of cis-1,4 units having a low proportion, &#x3c;1%, of 1,2-vinyl content, and also having a small molar-mass-polydispersity index (MPI), characterized in that

Neodymium-catalyzed polybutadienes

The present invention relates to nano-structured diene polymers and their preparation and to their use.

Nanostructed polymers on the basis of conjugated dienes

The present invention relates to water and solvent-free polymers, in particular water and solvent-free synthetic rubber products like styrene butadiene rubber products and butadiene rubber products as well as a process for the production thereof. The invention further relates to a device suitable to accomplish said process.

Process for the production of water and solvent-free polymers

The invention relates to a high-molecular-weight, linear, neodymium-catalysed polybutadiene having a high proportion, &#x3e;95%, of cis-1,4 units having a low proportion, &#x3c;1%, of 1,2-vinyl content, and also having a small molar-mass-polydispersity index (MPI), characterized in that

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Düsseldorf, Germany

Heike Kloppenburg