Borealis Technology Oy

Roger Goris

Vidar Almquist

Paul Allemeersch

Ann Kristin Lindahl

Ann Kristen Lindahl

Harry Oysaed

HDPE compositions comprising a bimodal polymer and a nucleating agent, for producing moulded articles with increased E-modulus and high ESCR, and the use of such compositions in the production of moulded articles.

HDPE polymer compostion

Ths invention provides a process for the preparation of a polyethylene, in particular an HDPE suitable for blow moulding of HIC, which comprises polymerizing ethylene and, optionally an ethylenically unsaturated comonomer copolymerizable therewith, in the presence of a catalyst comprising a first silica-supported chromium catalyst having a pore volume of at least 2 mL/g, a surface area of at least 350 m /g and a chromium content of 0.1 to 1.0% by weight and a second silica-supported chromium catalyst having a pore volume of at least 2 mL/g, a surface area of at least 450 m /g and a chromium content of 0.1 to 1.0% by weight, wherein the silica support of said first catalyst also comprises alumina and the silica support of said second catalyst also comprises titanium, and preferably a co-catalyst.

Growing community of inventors

Singapore, Singapore

Roger Goris