Arlanxeo Launches New Rubber Grade for Automotive Industry

Arlanxeo has launched a semi-crystalline ethylene propylene diene monomer (EPDM) rubber grade with a very high Mooney viscosity for demanding rubber applications, particularly in the automotive industry.

Keltan 13561C DE delivers excellent mixing and fast extrusion behaviour with high elasticity and collapses resistance in high filled compounds, supporting the reduction of overall compound volume costs. When replacing existing EPDM polymers, Keltan 13561C DE can significantly improve the mechanical properties of EPDM compounds with the same compound loading.

This is the first Keltan grade with five digits, indicating its high Mooney viscosity. Keltan 13561C DE has a high product viscosity of 130 Mooney Unit (MU) – higher than any other current Keltan EPDM grade. Although Arlanxeo does offer products with a higher polymer Mooney, these are created by adding much more extender oil to the product.

Besides automotive solid seals, another key application is wastewater seal compounds, where Keltan 13561C DE provides excellent mixing and processing properties for both extrusion and moulding technologies, whilst meeting the full set of technical requirements according to DIN EN 681-1 (cold water). A key benefit is that the finished product offers optimal weather and ozone resistance during outside storage for a longer time. Additionally, Keltan 13561C DE is able to provide a one polymer solution for automotive coolant hoses.

The new Keltan grade was launched in China and South America and product samples from commercial plant production are now available worldwide.

“Here we have a polymer Mooney of 150 MU and yet we are adding “only” 15 parts of extender oil to the product, resulting in a viscosity of 130 MU. The result is a 5-digit code and a unique grade,” said Gose van Zandvoort, technical manager at Arlanxeo business line Keltan.

“This new Keltan grade is not only unique in our portfolio, but also in the global EPDM market. We are currently starting to develop recipes for demanding applications to explore the full potential of this product and are considering creating further variants with different ethylene and ENB contents,” added Chretien Rooijakkers, head of global marketing for the business line Keltan.