Borealis Ag

Abu Dhabi Polymers Company Limited (Borouge) L.l.c.

Velichko Hristov

Markus Gahleitner

Mohammad Al-Haj Ali

Yi Liu

Christelle Grein

Antti Tynys

Michiel Bergstra

Bhawna Kulshreshtha

Juliane Braun

Luc Monnissen

Jari Äärilä

Saeid Kheirandish

Pablo Ivan Aguayo Arellano

Ashish Kumar

Stefan Hochradl

Ernst Zopf

Alexander Standler

Manfred Jarzombek

Sandeep Tyagi

Sanna Martin

Nicke Bergman

Andrey Buryak

Kshama Motha

Henrich Kaminski

Süleyman Deveci

The invention relates to a process for removal of volatile components from an olefin polymer, the process carried out in an extruder comprising at least one vacuum degassing zone, said process comprising the steps of: (a) introducing a stream of an olefin polymer into the extruder; (b) extruding the olefin polymer in the extruder at a temperature which is higher than the melting temperature of the olefin polymer but lower than the decomposition temperature of the olefin polymer, thereby producing an olefin polymer melt having reduced amount of volatile components, wherein the process in the extruder has a residence time distribution broadness (&#x3c3;2) in the range of 800 to 4000 as define by equation (1) wherein: &#x3c3;2 is the residence time distribution broadness, T is the mean residence time, t is the interval of residence time a fluid element of the olefin polymer spends in the extruder, E(t) is the residence time distribution function, and wherein the process optionally comprises a step (c) where the melt of the olefin polymer is passed through a die zone to a pelletizer for pelletizing the obtained olefin polymer.&#x3c3;=&#x222b;()()&#x2003;&#x2003;equation (1)

Process for removing volatile components from an olefin polymer and article obtained

A process for reducing the volatile organic compound content of granular plastomers having a density of equal to or lower than 883 kg/mand a MFRof 100.0 g/10 min or lower (ISO 1133 at 2.16 kg load and 190&#xb0; C.), to below 65 ppm (VOC, VDA277), the process comprising the steps of providing a granular raw plastomer in a treatment vessel, the granular raw plastomer having a density of equal to or lower than 883 kg/m, and a MFRof 100.0 g/10 min or lower (ISO 1133 at 2.16 kg load and 190&#xb0; C.), and a volatile organic compound content (VOC, VDA277) of above 150 ppm, subjecting said granular raw plastomer to a gasflow within the range of 30 m/(h t) to 150 m/(h t) for an aeration time of less than 96 hours, whereby the gas has a minimum temperature of at least 26&#xb0; C. measured at a gas inlet of the treatment vessel and a maximum temperature of 4&#xb0; C. below the Vicat temperature (10 N, ISO 306) of the granular raw plastomer or 35&#xb0; C. measured at the gas inlet of the treatment vessel, whatever value is lower; and recovering the granular plastomer.

Process for obtaining low volatile plastomers

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Linz, Austria

Velichko Hristov