Germany Lanxess developed EPDM Keltan 9565Q same performance comparable to natural rubber
EPDM Keltan 9565Q rubber products made from IKSONIC
Germany Lanxess Ads, called on developed a performance comparable with natural rubber ethylene propylene diene monomer rubber (EPDM) – Keltan 9565Q. Compared with natural rubber, high molecular weight make Keltan 9565Q and natural rubber having similar high strength and elasticity, and difficult to aging; EPDM retains heat resistance, weather resistance and ozone resistance and heat aging better than natural rubber, especially in high dynamic applications; has a lower processing costs.
“Mechanical engineering and automotive industry customers demand more able to withstand long-term high temperature rubber products. With its natural rubber elasticity and high tear resistance has been applied in the industrial field, but it is difficult to meet the increasing temperature requirements . “LANXESS performance elastomers business unit synthetic rubber expert John Beelen explained that despite the poor heat aging properties of natural rubber, but in high stress rubber parts (cushioning member), the natural rubber remains far It is considered to be almost indispensable material. The reason for this dilemma is that the typical molecular structure of the material. Natural rubber is a long-chain highly ordered molecular structure guarantees its excellent flexibility, but unsaturated bond polymer backbone makes it easier in case of ozone, oxygen decomposed, or a case of free radicals, UV and high temperature occurs gradually secondary crosslinking reaction, which causes cracks when vulcanized natural rubber is subjected to high temperatures in the mid and brittle. The use of additives to slow this process is not a long-term solution.
It is understood, EPDM Keltan 9565Q through improved synthesis process, to further improve the molecular weight EPDM, and thus achieve the same dynamic performance similar to natural rubber – even after heat aging remains the same; it reaches the sample tan delta values similar to natural rubber lower level; the EPDM having a fully saturated molecular chains, aged at 100 ℃ and 120 ℃ 168 hours, its tear resistance and elongation at break achieved better results than natural rubber; superior compression traditional natural rubber vulcanization system, and thermal stability can be at least natural rubber (effective curing system) par. In addition to strength, elasticity and resistance to aging, pre-aged samples Keltan 9565Q with natural rubber samples with considerable life; but after a little Keltan 9565Q recipe optimization, fatigue life will be greatly improved, reaching the thermal stability of natural rubber mix the same level of mixing.
EPDM Keltan 9565Q opens up new applications in the field, can help extend the maintenance cycle, the engine and components to run faster, more powerful: you can run at higher temperatures, shock absorbing member will not be exposed to high temperature of By rapidly aging.
In addition, the new material is a process also brought benefits. Compared with natural rubber, EPDM due to molecular chain backbone does not contain a double bond and less prone to reversion; polymer narrow its target range, ease of processing, the process more reproducible and consistent. Meanwhile, the synthetic rubber processing may be at a higher temperature, greatly increasing productivity.
