Basf Aktiengesellschaft

Roland Saive

Guido Funk

Rainer Konrad

Martin Lux

Hans-Joachim Mueller

Hans-Helmut Goertz

Kaspar Evertz

Siegfried Weber

Dieter Lilge

Wolfgang Rohde

Peter Bauer

Guenther Schweier

Rainer Hemmerich

Robert Bachl

Peter Koelle

Godofredo Follmer

Ulrich Bueschges

Franz Langhauser

Juergen Schmidt-Thuemmes

Hans Gropper

Wolfgang Micklitz

Konrad Richter

Polyalk-1-enes are prepared by polymerization of alk-1-enes with the aid of the compound bis(cyclopentadienyl)-chromium(II)

Preparation of homo- and copolymers of alk-1-enes

Polymerisates of ethylene with a high degree of resistance to stress crack, and a catalyst system for the production thereof

Preparation of polymers of ethylene by suspension polymerization

A process for the preparation of a supported catalyst for the polymerization of .alpha.-olefins, in which

Preparation of a supported catalyst for the polymerization of

A novel Phillips catalyst for the copolymerization of ethylene with .alpha.-olefins, contains, as a catalytically active component, a finely divided, aluminum silicate-supported, phosphorus-containing chromium catalyst. This can be prepared by applying at least one organic phosphorus(III), (IV) and/or (V) compound and at least one chromium(III) compound which does not react with said phosphorus compounds under the reaction conditions used, in succcession in any order or simultaneously, to a finely divided aluminum silicate hydrogel or xerogel with formation of a catalyst intermediate and activating the catalyst intermediate at elevated temperatures in an oxidizing atmosphere, with the result that the chromium catalyst is formed. The novel Phillips catalyst gives ethylene/.alpha.-olefin copolymers in which the comonomers are more uniformly distributed over the copolymer chains than is the case with ethylene/.alpha.-olefin copolymers which have been prepared with the aid of conventional Phillips catalysts. Moldings which have been produced from the ethylene/.alpha.-olefin copolymers obtained in the novel procedure have a particularly high environmental stress cracking resistance and an excellent creep rupture strength.

Phillips catalyst and its use for the preparation of

Homopolymers of ethylene or copolymers of ethylene with minor amounts of other C.sub.3 -C.sub.12 -alk-1-enes are prepared by catalytic polymerization in a suspension or in the gas phase in the presence of an antistatic agent at from 50 to 120.degree. C. and from 5 to 50 bar by a process in which the antistatic agent used is a mixture of the following substances: a) a metal salt of medialanic acid of the formula (I) ##STR1## b) a metal salt of an anthranilic acid of the general formula (II) ##STR2## where the organic radical R.sup.1 is either

Preparation of homopolymers of ethylene or copolymers of ethylene

A novel Phillips catalyst for the homopolymerization of ethylene and the copolymerization of ethylene with .alpha.-olefins contains, as a catalytically active component, a chromium catalyst supported on a finely divided aluminum silicate gel, modified with a fluoride and activated in an oxidizing atmosphere at elevated temperatures. The finely divided aluminum silicate gel (carrier gel) used here has an alumina content of from 0.5 to 6% by weight, the alumina being concentrated in the surface region of the carrier gel particles. The novel Phillips catalyst has high productivity and gives high molecular weight ethylene homopolymers and copolymers which have excellent low temperature impact strength and do not tend to swell in the blow molding process on emergence from the extruder die.

Phillips catalyst and its use for the preparation of ethylene

A novel Phillips catalyst for the homopolymerization of ethylene and the copolymerization of ethylene with .alpha.-olefins contains as catalytically active components a specific chromium catalyst on an aluminum phosphate support and cocatalysts of the formula I to IV, ##STR1## where M is lithium, sodium and potassium,

Phillips catalyst and its use for preparing ethylene homopolymers and

Homopolymerization and copolymerization of ethene is carried out using a Ziegler catalyst system consisting of (1) a transition metal catalyst component, (2) an organoaluminum catalyst component and (3) an organohalogen catalyst component. The component (1) used is the solid-phase product (VI) which has been obtained by a method in which (1.1) first (1.1.1) an inorganic oxidic substance (I) as a carrier and (1.1.2) a solution (II) of (IIa) a certain oxahydrocarbon and (IIb) a mixture of (IIb1) a vanadium trichloride/alcohol complex and (IIb2) a titanium trihalide or titanium trihalide/alcohol complex and (IIc) a silicon or boron compound are combined with formation of a suspension (III) and the latter is evaporated to form a solid-phase intermediate (IV) and (1.2) then (1.2.1) the intermediate (IV) obtained in (1.1) and (1.2.2) a dissolved organoaluminum compound (V) are combined with formation of a suspension, the solid-phase product (VI) formed as the suspended substance being the transition metal catalyst component (1).

Preparation of homopolymers of ethene and copolymers of ethene with

A transition-metal catalyst component for a Ziegler catalyst system, obtainable by

Transition-metal catalyst component for a Ziegler catalyst system, and

The homopolymerization and copolymerization of ethene are carried out using a Ziegler catalyst system consisting of

Preparation of homopolymers of ethene and copolymers of ethene with high

High density ethylene polymers are prepared by polymerizing the monomers in the presence of a Ziegler catalyst system by a process in which the resulting solid ethylene polymer is reacted in the melt with an additive capable of binding acids by esterification. The ester-forming additives are preferably epoxide compounds.

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Ludwigshafen, Germany

Roland Saive