Total Research & Technology Feluy

Total Petrochemicals Research Feluy

Jean-Marie Boissiere

Aurélien Vantomme

Pierre Belloir

Alain Van Sinoy

Jurjen Meeuwissen

A polyethylene resin having a multimodal molecular weight distribution comprising at least two polyethylene fractions A and B, fraction A being substantially free of comonomer and having a lower weight average molecular weight and a higher density than fraction B, each fraction prepared in different reactors of two reactors connected in series in the presence of a Ziegler-Natta catalyst system, the polyethylene resin having a density of from 0.950 to 0.965 g/cmand a melt index MI2 of from 0.5 to 5 g/10 min.

Bimodal polyethylene for injection stretch blow moulding applications

This invention covers injection stretch blow molded articles prepared from polyethylene resin having a bimodal molecular weight distribution (MWD), defined by the ratio of the weight average molecular weight (Mw) to the number average molecular weight (Mn), of from 2 to 20, comprising two polyethylene fractions A and B, fraction A being substantially free of comonomer and having a lower weight average molecular weight and a higher density than fraction B, each fraction prepared in different reactors of two reactors connected in series in the presence of a metallocene-containing catalyst system.

Injection stretch blow moulded articles

An injection stretch blow molded article may include a Ziegler-Natta catalyzed polyethylene resin having a multimodal molecular weight distribution and including at least two polyethylene fractions A and B. Fraction A may have a higher molecular weight and a lower density than fraction B. Each fraction may be prepared in different reactors of at least two reactors connected in series. Fraction A may have a melt index HL275 of at least 11 g/10 min and of at most 20 g/10 min, and a density of at least 941 kg/mand of at most 946 kg/m. The polyethylene resin may have a melt index MI2 of at least 1.5 g/10 min and of at most 3.0 g/10 min, and a density of at least 950 kg/mand of at most 965 kg/m.

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Brussels, Belgium

Jean-Marie Boissiere