Borealis Ag

Borealis Technology Oy

Hermann Prokschi

Hermann Braun

Markus Gahleitner

Katja Ellen Klimke

Jingbo Wang

Johanna Lilja

Klaus Bernreitner

Pauli Leskinen

Martina Sandholzer

Yi Liu

Tanja Piel

Alexandra Romina Albunia

Qizheng Dou

Udo Muster

Katja Klimke

Rebeca Reguillo Carmona

Sascha Kaltenbacher

Ulrich Schreider

Frank Schroder

Siegfried Westmüller

Thomas Hager

Frank SCHRÖDER

Ulrich Schreieder

The present invention provides a process for extruding and pelletising a propylene copolymer. The copolymer has a content of comonomer from 5 to 40% by mole, a melt flow rate MFRmeasured at 230&#xb0; C. under a load of 2.16 kg of from 0.5 to 15 g/10 min and a content of cold xylene soluble material of from 20 to 60% by weight. The process comprises extruding the propylene copolymer through a die plate into an underwater pelletiser and cutting strands of the propylene copolymer into pellets in the underwater pelletiser, wherein the ratio of the mass flow rate of the propylene copolymer to the mass flow rate of the cooling water is from 0.020 to 0.060; and the propylene copolymer comprises a polymeric nucleating agent.

Process for producing pellets of copolymers of propylene

The present invention is directed to a process for producing a modified olefin polymer having increased melt strength in an extruder. The process comprising the steps of: (A) contacting a stream comprising particles of an olefin polymer with a vapour stream of a functionally unsaturated compound in vapour phase thereby producing a first mixed stream; (B) passing the first mixed stream to an extruder; (C) melting the polymer particles of the first mixed stream in the extruder; (D) introducing a stream of a free radical generator either into the first mixed stream or into the extruder; and (E) extruding the first mixed stream and the free radical generator at a temperature which is greater than the decomposition temperature of the free radical generator and the melting temperature of the olefin polymer but less than the decomposition temperature of the olefin polymer thereby producing the modified olefin polymer in the extruder.

Process for mixing olefin polymer with reactants

The invention relates to a propylene homopolymer or copolymer having a comonomer in the copolymer selected from ethylene, C-C-alpha olefin, said propylene homopolymer or copolymer being free of phthalic compound. It further relates to a long-chain branched propylene homopolymer or copolymer (b-PP) having a comonomer in the copolymer selected from ethylene, C-C-alpha olefins, said long-chain branched propylene homopolymer or copolymer (b-PP) being free of phthalic compound. As well as their production processes and uses.

Long-chain branched polypropylene for film application

Long-chain branched polypropylene for foam application

The present invention relates to a process for providing a polypropylene composition comprising a branched polypropylene (b-PP), a polypropylene composition as well as a film comprising the polypropylene composition.

One-step production of a polypropylene composition

The present invention relates to a multimodal polyethylene composition which can be manufactured into pipes showing improved pressure resistance comprising a high density multimodal ethylene polymer component (A) having a density of at least 930 kg/m, and a MFRof not more than 15 g/10 min, wherein said composition exhibits a LAOS-NLF defined as 

Multimodal polyethylene composition with high pressure resistance

Process for providing a polypropylene composition comprising a branched polypropylene in which a polypropylene with a melt flow rate MFR(230&#xb0; C.) of more than 0.5 g/10 min is reacted with a thermally decomposing free radical-forming agent and optionally with a bifunctionally unsaturated monomer obtaining thereby the branched polypropylene, wherein the polypropylene composition has a Fmelt strength of more than 20.0 cN and a Vmelt extensibility of more than 200 mm/s.

Foam produced from polypropylene with low gel content

The invention relates to a device and a method for impregnating filaments, wherein the filaments form a roving. The device comprises a barrel () having at least one groove () formed in circumferential direction of the barrel, an inner space formed along the center axis of the barrel, and at least one recess () which forms a connection between the inner space and the groove. The recess includes a cylindrical section (), a conical section () and a pocket section (). By means of said device and according to the method, a polymer material can be pressed successively from the inner space through at least the cylindrical section and the conical section into the groove to impregnate the filaments of the roving which is drawn through the groove.

Impregnation of a filament roving

Growing community of inventors

Wartberg ob der Aist, Austria

Hermann Prokschi