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Two families of polymers, 'AtTlnity' polyolefin plastomers (POPs) and 'Engage' polyolefin elastomers (POEs), have recently been introduced by Dow Plastics.
Affinity POPs cover a wide rage of thermoplastic properties, from rigid to flexible. They are characterised by lower and sharper melting points and higher elasticity which provide improved sealing properties. The materials are tough, flexible and have a lower specific gravity for lightweight moulded and extruded thermoplastic applications. To date, the family includes nine plastomers, five of which (PL1840, PL1880, FM1570, PL1845 and PFll40) can be used for high performance sealing applications.
Engage POEs are recognised for their rubber-like properties, generally containing greater than 20wt.% octene comonomer. Key characterisitics include a high degree of flexibility, crosslinkability, excellent heat ageing resistance and superior compression set resistance, and long chain branching which enhances processability. Among the first seven Engage POEs to be launched, three (EG8100, EGS150 and EP8500) can be used to make seals and appliance gaskets.
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