Borealis Ag

Borealis Technology Oy

Borealis Gmbh

Pcd Polymere Gesellschaft M.b.h.

Jens Reussner

Eberhard Ernst

Wolfgang Neissl

Herwig Schottenberger

Klaus Bernreitner

Peter Denifl

Wolfgang Stockreiter

Benno Bildstein

Tung Pham

Christian Sauer

Karl Heinz Thiele

Per Roterud

Kjell-Arne Solli

Christine Schliessburg

Ingo Wartusch

Michael Buchmeiser

Olaf Elsner

Herbert Angleitner

The present invention relates to a polymer composition, comprising: (i) a polypropylene matrix; (ii) a first elastomeric phase dispersed within the matrix and having a glass transition temperature Tg1, measured with dynamical mechanical thermal analysis according to ISO 6721-2, wherein the first elastomeric phase comprises an ethylene copolymer having comonomer units derived from Cto Colefins; (iii) a second elastomeric phase dispersed within the matrix, wherein the second elastomeric phase is crosslinked and has a glass transition temperature Tg2, measured with dynamical mechanical thermal analysis according to ISO 6721-2, within the range of &#x2212;70&#xb0; C. to &#x2212;90&#xb0; C., wherein the difference between Tg1 and Tg2 is at least 15&#xb0; C. and Tg1 is higher than Tg2.

Impact-modified polypropylene

The present invention is directed to the use of carbonyl compounds to reduce the headspace emission according to VDA 277 of a polymer, wherein the carbonyl compounds are selected from the group consisting of aromatic carboxylic acid having a pKa measured in DMSO of at least 10.5, fatty acid amide and fatty acid ester.

Reduction of volatiles of stabilized polypropylene/talc compositions by using specific acidic environment

A modified supported olefin polymerization catalyst modified by prepolymerization with an olefin or an olefin mixture different from the olefin or olefin mixture of the subsequent olefin polymerization. The polymerization catalyst is a metallocene, and the melting or softening point of the polyolefin made using the catalyst is at least 20&#xb0; C. lower than that of the prepolymerized polyolefin.

Modified supported catalysts for the polymerization of olefins

Metallocenes with ferrocenyl-substituted bridges used in olefin polymerization

A process for preparing a catalyst support in which a hydrophilic inorganic oxide of an element of main groups 2, 13 or 14 or transition group 4 of the Periodic Table or a mixture or mixed oxide thereof is dried at from 110 to 800&deg; C., subsequently reacted, if desired, with alumioxanes or aluminum alkyls and subsequently reacted simultaneously with aluminoxanes and bisphenol A as a polyfunctional organic crosslinker. In a further stage, the catalyst support can be brought into contact with a polyolefin catalyst, giving a supported polyolefin catalyst which is used, in particular, for the polymerization of olefins.

Process for preparing catalyst supports and supported polyolefin catalysts and also their use for the preparation of polyolefins

Process for preparing a supported metallocene catalyst, in which a hydrophilic, macroporous, finely divided aluminum oxide, silicon oxide, titanium oxide or zirconium oxide or a mixture or mixed oxide thereof is dried at from 110 to 800.degree. C., then reacted with an aluminoxane and subsequently with polyfunctional organic crosslinkers. In a further step, the catalyst support can be mixed with a reaction product of metallocenes and activators, giving a supported metallocene catalyst which is used, in particular, for the polymerization of olefins.

Catalyst supports metallacene catalysts and their use for the

Metallocenes with silyl-substituted bridges and their use for olefin

A process for preparing a catalyst support in which a hydrophilic inorganic oxide of an element of main groups II to IV or transition group IV of the Periodic Table or a mixture or mixed oxide thereof is dried at from 110 to 800.degree. C., subsequently reacted, if desired, with aluminoxanes or aluminum alkyls and subsequently reacted simultaneously with aluminoxanes and polyfunctional organic crosslinkers. In a further stage, the catalyst support can be brought into contact with a polyolefin catalyst, giving a supported polyolefin catalyst which is used, in particular, for the polymerization of olefins.

Process for preparing catalyst supports and supported polyolefin

Process for preparing a catalyst support, in which a hydrophilic, macroporous, finely divided aluminum oxide, silicon oxide, titanium oxide or zirconium oxide or a mixture or mixed oxide thereof is dried at from 110 to 800.degree. C., then reacted with an aluminoxane and subsequently with polyfunctional organic crosslinkers. In a further step, the catalyst support can be mixed with a reaction product of metallocenes and activators, giving a supported metallocene catalyst which is used, in particular, for the polymerization of olefins.

Catalyst supports, supported metallocene catalysts and their use for the

Metallocenes of the formula ##STR1## where M is a metal selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta or an element selected from the group of the lanthanides, X.sub.1 and X.sub.2 are each an alkyl, alkoxy, aryl, aryloxy, alkenyl, arylalkyl, alkylaryl or arylalkenyl group, hydrogen or halogen and L.sub.1 and L.sub.2 are each a hydrocarbon which can form a sandwich structure with M, where at least L.sub.1 or L.sub.2 is substituted by or condensed with a ferrocene or ruthenocene radical. R.sub.1 is C, Si, Ge or Sn or the whole bridge A(R.sub.1).sub.n B is a biphenylene radical which is unsubstituted or substituted by A and/or B, A and B have the meanings of X.sub.1 and X.sub.2, n is an integer from 0 to 4.

Metallocenes and their use for olefin polymerization

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Jens Reussner