Process for the preparation of a polyolefin wax
AssigneeTargor GmbH
InventorsAndreas Winter, Jurgen Rohrmann, Volker Dolle, Martin Antberg, Walter Spaleck
Life of this patent
Estimating the term…
Abstract
If a catalyst consisting of an aluminoxane and a metallocene of the formula I ##STR1## in particular R.sup.5 R.sup.6 C (Ind).sub.2 or R.sup.5 R.sup.6 C (Ind).sub.2 Zr(CH.sub.3).sub.2, is employed for the polymerization of olefins of the formula R.sup.9 CH.dbd.CHR.sup.10 (R.sup.9, R.sup.10 =H or C.sub.1 -C.sub.28 alkyl), the isotacticity of the polymer wax and hence the hardness and melting point can be varied simply by changing the polymerization temperature, without the molecular weight of the polymer being noticeably changed at the same time.
Claims25
A process for the preparation of a polyolefin wax by polymerization or copolymerization of an olefin of the formula R.sup.9 CH.dbd.CHR.sup.10, in which R.sup.9 and R.sup.10 are identical or different and are a hydrogen atom or an alkyl radical having 1 to 28 carbon atoms, or R.sup.9 and R.sup.10, together with the atoms joining them, can form a ring, at a temperature of -60 to 200.degree. C. under a pressure of 0.5 to 100 bar, in solution, in suspension or in the gas phase, in the presence of a catalyst which consists essentially of a metallocene and an aluminoxane of the formula II ##STR9## for the linear type, and/or of the formula III ##STR10## for the cyclic type, in which, in the formulae II and III, R.sup.8 is a C.sub.1 -C.sub.6 -alkyl group or a C.sub.6 -C.sub.10 -aryl group and n is an integer from 2 to 50, wherein the metallocene is a compound of the formula I ##STR11## in which M is a metal of group IVb of the periodic table, R.sup.1 and R.sup.2 are identical and are a C.sub.1 -C.sub.10 -alkyl group, or a halogen atom,
- R.sup.3 and R.sup.4 are identical and are a mono- or polynuclear hydrocarbon radical which can form a sandwich structure with the transition metal,
- and R.sup.5 and R.sup.6 are identical or different and are a hydrogen atom, a C.sub.1 -C.sub.10 -alkyl group, or a C.sub.6 -C.sub.10 -aryl group.
A process for the preparation of a polyolefin wax by polymerization or copolymerization of an olefin of the formula R.sup.9 CH.dbd.CHR.sup.10, in which R.sup.9 and R.sup.10 are identical or different and are a hydrogen atom or an alkyl radical having 1 to 28 carbon atoms, or R.sup.9 and R.sup.10, together with the atoms joining them, can form a ring, at a temperature of -60 to 200.degree. C. under a pressure of 0.5 to 100 bar, in solution, in suspension or in the gas phase, in the presence of a catalyst which consists essentially of a metallocene and an aluminoxane of the formula II ##STR12## for the linear type, and/or of the formula III ##STR13## for the cyclic type, in which, in the formulae II and III, R.sup.8 is a C.sub.1 -C.sub.6 -alkyl group or a C.sub.6 -C.sub.10 -aryl group and n is an integer from 2 to 50, wherein the metallocene is a compound of the formula I ##STR14## in which M is a metal of group IVb of the periodic table, R.sup.1 and R.sup.2 are identical and are a C.sub.1 -C.sub.10 -alkyl group or a halogen atom,
- R.sup.3 and R.sup.4 are different and R.sup.3 is an indenyl radical and R.sup.4 is a mono- or polynuclear hydrocarbon radical which can form a sandwich structure with the transition metal, and
- R.sup.5 and R.sup.6 are identical or different and are a hydrogen atom, a C.sub.1 -C.sub.10 -alkyl group, or a C.sub.6 -C.sub.10 -aryl group.
A process for the preparation of a polyolefin wax by polymerization or copolymerization of an olefin of the formula R.sup.9 CH.dbd.CHR.sup.10, in which R.sup.9 and R.sup.10 are identical or different and are a hydrogen atom or an alkyl radical having 1 to 28 carbon atoms, or R.sup.9 and R.sup.10, together with the atoms joining them, can form a ring, at a temperature of -60 to 200.degree. C. under a pressure of 0.5 to 100 bar, in solution, in suspension or in the gas phase, in the presence of a catalyst which consists essentially of a metallocene and an aluminoxane of the formula II ##STR15## for the linear type, and/or of the formula III ##STR16## for the cyclic type, in which, in the formulae II and III, R.sup.8 is a C.sub.1 -C.sub.6 -alkyl group or a C.sub.6 -C.sub.10 -aryl group and n is an integer from 2 to 50, wherein the metallocene is a compound of the formula I ##STR17## in which M is a metal of group IVb of the periodic table, R.sup.1 and R.sup.2 are identical and are a C.sub.1 -C.sub.10 -alkyl group, or a halogen atom,
- R.sup.3 and R.sup.4 are indenyl radical and
- R.sup.5 and R.sup.6 are identical or different and are a hydrogen atom, a C.sub.1 -C.sub.10 -alkyl group or a C.sub.6 -C.sub.10 -aryl group and
- said process takes place without the use or addition of hydrogen gas.
Dependencies are inferred from the claim text.