Basf Aktiengesellschaft

Basell Polyolefine Gmbh

Novolen Technology Holdings, C.v.

Base Aktiengesellschaft

Stefan Seelert

Franz Langhauser

David Fischer

Meinolf Kersting

Peter Klaerner

Hans Hoenl

Bertram Ostermayer

Andreas Jung

Klaus-Dieter R&uuml;mpler

Norbert Niessner

Dieter Lilge

Roland Hingmann

Friedrich Seitz

G&uuml;nther Schweier

Stephan Hüffer

Heike Gregorius

Jurgen Kerth

Rainer Alexander Werner

Günther Schweier

Wolfgang Micklitz

Joachim Rosch

Doris Zeltner

Patrik Muller

Joachim Rösch

Karl Huber

John Russell Grasmeder

Patrik M&uuml;ller

J&uuml;rgen Kerth

Ranier Neumann

Klaus-Dieter Rumpler

Propylene homopolymers, wherein, in their separation according to tacticity by first dissolving the polymers in boiling xylene, then cooling the solution to 25&#xb0; C. at a cooling rate of 10&#xb0; C./h and then, with ascending temperature, separating the propylene homopolymers into fractions of different tacticity, either one or more of the conditions that

Highly crystalline propylene homopolymers

Toughened propylene polymers having little tendency to white fracture

Polymers of propene

Multiphase homo- or copolymers of C,-C,-alk-1-enes are prepared by a process in which polymerization is effected in the presence of two different catalyst systems in one reaction zone, one of the catalyst systems containing, as active components, a metallocene complex of the general formula (I) or (II)

Preparation of multiphase homo- or copolymers of C2-C10-alk-1-enes in one reaction zone

Partially crosslinked plastic compositions with a melt flow index at 230.degree. C. and under a load of 2.16 kg, of from 0.1 to 100 g/10 min, and a gel content of less than 12% by weight, is prepared from

Plastic compositions partially crosslinked by unsaturated esters

Propylene polymers which comprise from 25 to 97% by weight of a propylene polymer (I) containing from 0 to 15% by weight of copolymerized C.sub.2 -C.sub.10 -alk-1-enes and also comprise from 3 to 75% by weight of a further propylene polymer (II) containing from 15 to 80% by weight of copolymerized C.sub.2 -C.sub.10 -alk-1-enes, are obtainable by two-stage polymerization of propylene and C.sub.2 -C.sub.10 -alk-1-enes in the presence of a Ziegler-Natta catalyst system which comprises a titanium-containing solid component a) comprising a compound of magnesium, a halogen, silica gel as support and a carboxylic ester as electron donor compound, and also as cocatalysts an aluminum compound b) and a further electron donor compound c), where, in a first polymerization stage, propylene is polymerized in the presence or absence of further C.sub.2 -C.sub.10 -alk-1-enes at from 50.degree. to 100.degree. C., pressures in the range from 15 to 40 bar and a mean residence time of from 0.5 to 5 hours and subsequently, in a second polymerization stage, a mixture of propylene and further C.sub.2 -C.sub.10 -alk-1-enes is polymerized at from 30.degree. to 100.degree. C., pressures in the range from 15 to 40 bar and mean residence times of from 0.5 to 5 hours onto the propylene polymer obtained from the first polymerization stage, and the silica gel used as support for the titanium-containing solid component has a mean particle diameter of from 5 to 200 .mu.m, a mean particle diameter of the primary particles of from 1 to 10 .mu.m and voids or channels having a mean diameter of from 1 to 10 .mu.m, which voids or channels have a macroscopic volume as a proportion of the total particle in the range from 5 to 20%.

Propylene polymers

Halogen-free flameproofed thermoplastic molding materials based on polyphenylene ethers and polystyrene containing, as essential components, A) from 5 to 92% by weight of one or more polyphenylene ethers, B) from 5 to 92% by weight of a vinylaromatic polymer and C) from 3 to 25% by weight of a flameproofing agent based on C1) from 20 to 100% by weight (based on the total amount of C) of a polymeric phosphorus compound which is obtained by polymerizing or copolymerizing one or more compounds of the following structure: ##STR1## where ##STR2## R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.10 and R.sup.11 are each hydrogen, alkyl, cycloalkyl, aralkyl or aryl,

Halogen-free flameproofed thermoplastic molding materials based on

Thermoplastic molding materials contain, based in each case on the sum of components A, B and C,

Thermoplastic molding material

A thermoplastic molding material contains, in each case based on the sum of the constituents A, B and C,

Molding compositions of a styrene polymer, a polyolefin and a triblock

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Frankenthal, Germany

Stefan Seelert