Kautschuke

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Mechanical Properties

Comparison of NBR-Cell2-Nanocomposite with Conventional Filled Vulcanizates Part 1

NBR-Cell 2 nanocomposites processed via a new developed dynamical cocoagulation process demonstrate an enhancement in the materials properties compared to conventional filled materials. Experiments with the variation of the cellulose content and coagulation conditions demonstrate an optimum in the materials properties for a given combination of process parameters. Materials with an optimal set of parameters […] mehr...

16.Mai 2008 - Neues aus der Forschung

Improved Peroxide Curing Efficiency in Window Gasket Applications

Advantages of EPDM Rubber Products with a Third Monomer Part I

The recently Keltan ACE technology enables the production of EPDM polymers with up to 3wt% VNB as a third monomer in an economically feasible manner. A series of VNBEPDM’s has been evaluated in a typical peroxide-cured, window gasket formulation and has been compared with conventional ENB-EPDM and DCPDEPDM grades. It is shown that the peroxide […] mehr...

16.Mai 2008 - Neues aus der Forschung

Kautschuke

Combination of Hydrogenation and Isomerization of NR Using Palladium Catalyst

The purpose of the present work was to investigate the catalytic hydrogenation of natural rubber in the presence of palladium deposited on barium sulfate (Pd/BaSO4). The resulting polymeric structure was determined via 1H-NMR spectroscopy. It was found that the structure of the rubber product was formed as a result of competitive reactions: hydrogenation and cis-trans […] mehr...

16.Mai 2008 - Neues aus der Forschung

Längeres Leben in kritischer Umgebung

Kalrez Spectrum 6380 Dichtungen

Für den Einsatz in chemischen und petrochemischen Prozessen ist eine neue Perfluorelastomer-Dichtung erhältlich, die heißen, aminhaltigen, sauren und oxidierenden Medien deutlich länger standhält als vergleichbare Materialien mehr...

30.April 2008 - Produktbericht

Messmethode zur Charakterisierung von Gaseinschlüssen in kalandrierten Kautschukbahnen

Digitale Radiographie

Erstmalig wird die Digitale Radiographie zur zerstörungsfreien Charakterisierung von Gaseinschlüssen in dicken kalandrierten Kautschukbahnen eingesetzt. Die Messung und Auswertung der Ergebnisse hinsichtlich der Größen- und Raumverteilung der Gaseinschlüsse wie auch deren Anisometrie und Volumen wird beschrieben. Es wird eine praktikable Methode aufgezeigt, um den Einfluss der Oberflächenrauheit auf das Messergebnis zu minimieren. Use of Digital […] mehr...

14.April 2008 - Neues aus der Forschung

Kautschuke

Emission Behavior of Peroxide Crosslinked EPDM-Elastomers

These days profiles and other elastomer components used in vehicle interiors are subject to stringent requirements with respect to odor and gaseous emissions, while at the same time expected to maintain a high level as regards mechanical data and guarantee for lifetime. The crosslinking efficiency and emissions behavior of mono-, biand multifunctional peroxides were studied […] mehr...

14.April 2008 - Neues aus der Forschung

Kautschuke

Rheological Implications of the Reduction in Viscosity of SBR Copolymers During Mixing

Compound properties have not generally been quantitatively associated with a specific change in the elastomer rheology during mixing. In the present work different macromolecular patterns are related to the reduction in viscosity of the elastomer as a function of strain. Deformation history is investigated in terms of transient shear flow and the nonlinear response of […] mehr...

14.April 2008 - Neues aus der Forschung

Kautschuke

Characterization of Purified SKIM Rubber by Alkali Treatment for Pressure Sensitive Adhesive Application

Due to the lack of gel phase skim rubber (SK) shows a good solubility. Consequently, this material was approached to the aspect of pressure sensitive adhesive applications. Saponification by alkali treatment was applied to remove non-rubber components in SK. The suitable reaction time and temperature for preparing highly-purified SK (HPSK) were established. The nitrogen content […] mehr...

14.April 2008 - Neues aus der Forschung

Kautschuke

Research in the Synthetic Rubber Industry, A Quality Producers Perspecitve

Researchers in the rubber industry concentrate their work more and more on improving processes and quality or the modification of existing molecular structures. The pressures from the automotive industry and globalization are forcing everyone to optimize each and every process in order to reduce costs and keep a position amongst the technology leaders. Every aspect […] mehr...

14.April 2008 - Neues aus der Forschung

PTFE-Kern im EPDM-Mantel

Cimachem-Schlauch

Für einen dauerhaften Einsatz in den geläufigsten Anwendungen wurde der Cimachem-Schlauch entwickelt mehr...

24.März 2008 - Produktbericht

Kautschuke

Combination of NMR Relaxometry and Mechanical Testing During Vulcanization

A new design for an in-situ combination of NMR and rheological measurements is presented. The NMR instrumentation is based on a Bruker Minispec spectrometer with a home-built magnet system consisting of 64 permanent magnets in a so-called MANDHALA arrangement. This magnet reaches a flux density of about 0.23T, corresponding to a 1H NMR resonance frequency […] mehr...

17.März 2008 - Neues aus der Forschung

Für CIP-/SIP-Anwendungen entwickelt

Fluorkautschukmischungen Resifluor 500

Für Dichtungen, Membranen oder auch technische Teile für den Hygienebereich bietet eine neue Fluorkautschuk-Familie eine medien- und temperaturbeständige Werkstoffalternative mehr...

25.Februar 2008 - Produktbericht

Längere Wartungsintervalle

Therban AT

Ein niedrigviskoser HNBR-Typ sorgt dafür, dass die Radlagerdichtungen von Schaufelradbaggern länger halten mehr...

21.Februar 2008 - Produktbericht

SPEZIALSCHLÄUCHE AUS EPDM

1:0 GEGEN STICKOXIDE

Als wirksames Mittel gegen den Sommersmog hat sich das Reduktionsmittel AdBlue erweisen. Dass sich dieses System unter wirtschaftlichen Bedingungen nutzen lässt, ist nicht zuletzt Spezialschläuchen aus EPDM zu verdanken. mehr...

19.Februar 2008 - Fachartikel

Kautschuke

Design Guideline for Elastic Torsion Couplings

Investigations done at the IME resulted in the establishment of a statistically validated Wöhler endurance concept for dynamically loaded elastic torsion couplings. The concept enables durability prediction based on NR material fatigue, at confidence levels known for steel. As opposed to steel, no area of fatigue resistance is present, even not at very high cycle […] mehr...

12.Dezember 2007 - Neues aus der Forschung

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