Basell Polyolefine Gmbh

Basell Poliolefine Italia S.r.l.

Hoechst Aktiengesellschaft

Friedhelm Gundert

Martin Schneider

Klaus Hintzer

Giampiero Morini

Werner Schwertfeger

Bernd Lothar Marczinke

Joachim Berthold

Gernot Lohr

Peter Blickle

Ludwig Böhm

Frank Peter Alt

Maria Schmitt (nee Fusto)

Maria Schmitt

A catalyst component for the polymerization of olefins comprising Mg, Ti and Cl obtained by a process comprising the following steps:

Catalyst components for the polymerization of olefins and catalysts therefrom obtained

A catalyst component for the polymerization of olefins obtained by:

A solid catalyst component comprising the product of a process comprising (a) reacting a magnesium alcoholate of formula Mg(OR)(OR) compound, in which Rand Rare identical or different and are each an alkyl radical having 1 to 10 carbon atoms, with titanium tetrachloride carried out in a hydrocarbon at a temperature of 50-100&#xb0; C., (b) subjecting the reaction mixture obtained in (a) to a heat treatment at a temperature of 110&#xb0; C. to 200&#xb0; C. for a time ranging from 3 to 25 hours (c) isolating and washing with a hydrocarbon the solid obtained in (b), said solid catalyst component having a Cl/Ti molar ratio higher than 2.5.

Catalyst component for the polymerization of olefins

A catalyst system for the polymerization of olefins comprising (A) a catalyst component obtained by reacting a Mg(OR)(OR) compound, in which Rand Rare identical or different and are each an alkyl radical having 1 to 10 carbon atoms, with a tetravalent transition metal compound having at least a Metal-halogen bond, used in amounts such that the molar ratio Met-al/Mg is from 0.05 to 10; (B) an aluminum alkyl compound and (C) a linear or branched halogenated alkyl compound.

Catalyst system for the polymerization of olefins

For the (co) polymerization of ethylene with other 1-olefins, a Ziegler catalyst which comprises the product from the reaction of a magnesium alkoxide suspended or dispersed as ge in an inert solvent with a tetravalent transition metal compound and is subjected to a thermal after-treatment for a period of not more than 180 minutes is prepared. The catalyst gives a high yield of a polymer powder which has a broad molar mass distribution and is best suited to the production of films, hollow bodies and pipes.

Process for preparing 1-olefin (co) polymers

The invention relates to a process for preparing a poly-1-olefin by polymerization of a 1-olefin of the formula RCH&#x2550;CH, where Ris hydrogen or an alkyl radical having from 1 to 10 carbon atoms, in suspension, in solution or in the gas phase, at a temperature of from 20 to 200&#xb0; C. and a pressure of from 0.5 to 50 bar, in the presence of a catalyst which comprises the reaction product of a magnesium alkoxide with a transition metal compound (=component a) and an organometallic compound (=component b) and whose component a has been prepared in a manner having the feature that a magnesium alkoxide powder having a mean particle size, expressed as the d, in the range from 100 to 1000 &#x3bc;m is firstly processed by dry milling in a mill under inert conditions to produce magnesium alkoxide powder having a mean particle size, expressed as the d, of less than 15 &#x3bc;m, then suspended in an inert hydrocarbon in which the magnesium alkoxide is insoluble, and is reacted immediately without further pretreatment with a transition metal compound of titanium, zirconium, vanadium or chromium.

Process for preparing a poly-1-olefin in the presence of a Ziegler catalyst

The invention relates to a modified Ziegler catalyst for preparing a poly-1-olefin in suspension, in solution or in the gas phase, which catalyst comprises the reaction product of a magnesium alkoxide (component a) with a transition metal compound (component b) and an organometallic compound (component c) together with an additional component (d) comprising a compound of the chemical formulaM&#x2212;Rwhere M is an element of main group IV of the Periodic Table, R is halogen or an organic radical such as alkyl having from 1 to 10 carbon atoms, oxyalkyl having from 1 to 10 carbon atoms, cycloalkyl having from 4 to 8 carbon atoms in the ring and, if desired, from 1 to 6 substituents R' on the ring, aryl having from 6 to 10 carbon atoms in the aromatic and, if desired, from 1 to 6 substituents R&#x2032; on the aromatic, where R&#x2032; is a halogen or an alkyl radical having from 1 to 4 carbon atoms or an OH group or an NOgroup or an oxyalkyl radical having from 1 to 4 carbon atoms, and x is an integer from 1 to 4. The invention also relates to a process for preparing the Ziegler catalyst and to the homopolymerization or copolymerization of 1-olefins in its presence.

Modified Ziegler catalyst, process for preparing it and process for preparing poly-1-olefins in its presence

Solutions of copolymers of the tetrafluoroethylene/ethylene type Copolymer solutions comprising tetrafluoroethylene, ethylene and, as appropriate, further .alpha.-olefinic monomers in low-molecular-weight polymers of chlorotrifluoroethylene are described. They can be used for coatings, impregnations, cast films and for the production of fibers and filaments by gel spinning.

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Liederbach, Germany

Friedhelm Gundert