Bp Chemicals Limited

Ineos Commercial Services UK Limited

Alexandre Gallice

Jean-Loic Selo

Vince Reiling

Christophe Carlier

Philippe-Luc Bres

Uwe Waeckerle

An expandable polystyrene composition in the form of expandable beads, comprising by weight (1) 100 parts of a styrene polymer, (2) from 2.2 to less than 4.0 parts of at least one blowing agent, and (3) from 0.01 to 0.4 part of at least one plasticizing. The composition is particularly useful for manufacturing medium density expanded moulded polystyrene objects, particularly with a density from 40 to 190 g/l. A process for manufacturing such objects,is provided, together with pre-expanded beads with a buld density of 40 to 190 g/l, containing by weight (a) 100 parts of a styrene polymer, (b) from 0.5 to less than 3.0 parts of at least one blowing agent, and (c) from 0 to 0.4 part of at least one plasticizing agent.

Expandable polystyrene composition

The present invention relates to a process for the gas-phase (co-)polymerization of olefins in a fluidized bed reactor wherein fouling is prevented and/or flowability of polymer is improved thanks to the use of a process aid additive.

Process for the gas-phase (co-)polymerization of olefins in a fluidized bed reactor

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Lille, France

Alexandre Gallice