Borealis Ag

Borealis Technology Oy

Tonja Schedenig

Christelle Grein

Markus Gahleitner

Bo Malm

Joachim Fiebig

Pirjo Jääskeläinen

Dietrich Gloger

Cornelia Kock

Polypropylene composition comprising (a) a high melt strength polypropylene having a melt flow rate MFR2 (230&#xb0; C.) of equal or below 15 g/10 min and a branching index g' of below 1.0, (b) a first heterophasic propylene copolymer comprising a polypropylene having a melt flow rate MFR2 (230&#xb0; C.) in the range of 50 to 500 g/10 min and an elastomeric propylene copolymer having a propylene content in the range of 50 to 80 wt.-% and an intrinsic viscosity (IV) of equal or more than 2.5 dl/g, (c) a second heterophasic propylene copolymer comprising a random propylene copolymer having a melt flow rate MFR2 (230&#xb0; C.) in the range of 1 to 40 g/10 min, a branching index g&#x2032; of 1.0, and a comonomer content of more than 0.5 wt.-%, and an elastomeric propylene copolymer having a propylene content in the range of 50 to 80 wt.-%, and an intrinsic viscosity (IV) of equal or below 2.4 dl/g, (d) a polyethylene plastomer having an ethylene content of at least 50 wt.-%, and (e) a mineral filler (F).

Stiff polypropylene composition with excellent elongation at break

Polymer composition comprising&#x2014;a heterophasic propylene copolymer comprising a polypropylene matrix and an elastomeric propylene copolymer comprising at least one comonomer selected from the group consisting of ethylene and Cto C&#x3b1;-olefin, and&#x2014;a styrenic based elastomer(s) (B), wherein the styrene content in each styrenic based elastomer (B) is equal or below 15 wt.-%, and the total amount of the styrenic based elastomer(s) (B) based on the total amount of polymers present in the polymer composition is of 16.0 to 46.0 wt.-%.

Composition based on polypropylene compounds with styrenic based elastomers

The invention relates to the use of a polyolefin composition comprising a propylene-ethylene random copolymer having an ethylene content of 0.5-10 wt % and a randomness R of the ethylene distribution in the polymer chain of &#x2267;0.945 for the production of articles having high sterilization resistance.

Polyolefin compositions having improved optical and mechanical properties

The present invention relates to a polypropylene composition comprising a propylene homopolymer or a propylene random copolymer having at least one comonomer selected from alpha-olefins with 2 or 4-8 carbon atoms and a comonomer content of not more than 8.0 wt %, wherein the propylene homo- or copolymer is polymerized in the presence of a Ziegler-Natta catalyst, and the polypropylene composition has a MWD of 2.0 to 6.0 and an MFR (2.16 kg/230&#xb0; C.) of 4.0 g/10 min to 20.0 g/10 min, characterized in that the polypropylene composition has not been subjected to a vis-breaking step, the use of the inventive polypropylene composition for the production of a film and/or injection molded articles, a process for preparing a film wherein the inventive polypropylene composition is formed into a film, and wherein the polypropylene composition has not been subjected to a vis-breaking step and a film comprising the inventive polypropylene composition.

Polypropylene composition with improved optics for film and moulding applications

Novel polyolefin compositions comprising (A) a first propylene-ethylene random copolymer and (B) a second propylene-ethylene random copolymer, wherein the polyolefin composition has an ethylene content CMof 1-10 wt % and an MFR(AB) of 3-20 g/10 min with the proviso that CM&#x3e;CMand MFR(A)/MFR(AB)&#x3e;1.45 and where the polyolefin composition further has a randomness R of the ethylene distribution in the polymer chain of &#x2267;0.945. Articles made from the novel polyolefin compositions have excellent optical properties even after subjecting them to a heat sterilization step.

The present invention relates to a heterophasic polypropylene composition which is sterilizable and has a high impact strength as well as improved optical properties both before and after a step of heat sterilization. Furthermore, the present invention relates to a film comprising said heterophasic polypropylene composition, and to the use of said composition for the production of a film. Finally, the present invention is directed to the use of such a film as a packaging material for medicals and/or food. The heterophasic polypropylene composition comprises a matrix resin which comprises (A) a propylene homopolymer and (B) a propylene random copolymer; and a dispersed phase which comprises (C) an ethylene-propylene rubber wherein (i) the melting point of the heterophasic polypropylene composition is at least 145&#xb0; C. and (ii) the content of comonomer in the matrix resin is at least 0.5 wt % based on the entire matrix resin without any additives.

Growing community of inventors

Enns, Austria

Tonja Schedenig