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Technical Papers

Kuraray elastomers based on PMMA hard-blocks and an acrylic-based soft-block
Technical Papers
Kuraray elastomers based on PMMA hard-blocks and an acrylic-based soft-block

Highly controlled copolymerisation process is said to yield “exceptionally clean” products with minimal residual monomers or oligomers compared to using radical polymerisation.

Newly designed easy processing SSBR for optimum performance in rubber compounding
Technical Papers
Newly designed easy processing SSBR for optimum performance in rubber compounding

A new family of easy processing sSBR provides “good hints” for developing rubber compounding strategies, according to a paper present by Fabio Bacchelli at this year’s DKT conference.

The results, he suggests, represent an excellent compromise between hysteresis, mixing and extrusion behaviour, in particular when used in combination with high performance batch grades.

Varying fuel composition worldwide: What are the effects on seals?
Technical Papers
Varying fuel composition worldwide: What are the effects on seals?

The global landscape of fuel compositions is undergoing drastic change with new fuel types like oxymethylene ethers (OMEs), biodiesel or dimethyl ether (DME) already commonly applied . The trends suggest that FKM is the only appropriate choice of sealing material, according to this study by Freudenberg Sealing Technologies.

Air peroxide system for crosslinking EPDM
Technical Papers
Air peroxide system for crosslinking EPDM

In a recent paper, Alfredo Defrancisci of Arkema France presented details of a new organic peroxide for curing EPDM profiles in hot-air ovens: offering advantages over sulphur vulcanisation

TPEs to meet automotive trends around sustainability and innovation
Technical Papers
TPEs to meet automotive trends around sustainability and innovation

At DKT 2019, Thomas Koeppl of Hexpol TPE GmbH presented a paper highlighting how the company is developing materials to meets automotive-industry requirements for increased sustainability, interior air quality, haptics, flame resistance and electronic properties.

Kiwa guiding TPE seals into drinking-water applications
Technical Papers
Kiwa guiding TPE seals into drinking-water applications

Thermoplastic elastomers (TPEs) are an established alternative to vulcanised rubbers in sealing applications for non-pressurised water systems, such as drainage and sewerage, according to Kiwa NV.

In a paper presented at the DKT 2018 conference in Nuremberg, the Dutch firm explained how it is setting up a new evaluation guideline for ‘thermoplastic’ seals in drinking-water applications.

As a starting point, the Rijswijk-based company is using an evaluation guideline based on EN 681-2 with additional tests in which the anisotropic behaviour of TPEs is taken into account.

Zeon: Improving long-term performance of HNBR compounds
Technical Papers
Zeon: Improving long-term performance of HNBR compounds

Zeon Corp. is seeking to enhance the long-term properties of hydrogenated nitrile rubber (HNBR) to meet increasing demands from the automotive and oil & gas industries. A particular focus is on peroxide-cured compounds, in which the use of metal oxides – typically 3-5phr of zinc oxide – is standard, set out a paper presented by Dana Stripe at the recent DKT 2018 conference in Nuremberg

Kumho Polychem
Technical Papers
Kumho Polychem advances semi-single site catalysts for production of new EPDMs

Technical paper from Korean petrochemicals group shows how system can deliver high levels of catalytic activity & C3 conversion, controllable molecular weight distribution and optimised diene distribut

Tandem process is revolutionising the tire industry
Technical Papers
Tandem process is revolutionising the tire industry

The tandem process has already improved the mixing process considerably. In the future, the machines will have to be further optimised with regard to dispersion, distribution, temperature control and process consistancy with improved economy…

DuPont: Advanced plastics and elastomers for engine systems
Technical Papers
DuPont: Advanced plastics and elastomers for engine systems

DuPont has published a new white paper to explain how replacing metals with high-performance polymers can help make vehicles lighter with the added benefits of easier processing, integration of functions and lower costs. Taking weight out of the vehicle is also a key route to achieving those goals, but the question is — how best to reduce weight?,  the company said in a release about the new guide.

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