Patent ID: 6080819
Filing Date: 2000-06-27
Classification: C08L

Abstract:
Blends of olefin polymers and syndiotactic vinyl polymers with a finely dispersed distribution of the components of the blend, a high dimensional stability at elevated temperatures and improved printability and paintability comprising, 1 to 99% by weight of C.sub.2 -C.sub.20 polyolefins or C.sub.2 -C.sub.20 olefin copolymers, 99% to 1% by weight of syndiotactic vinyl polymers selected from the group consisting of C.sub.8 -C.sub.14 aromatic polyvinyl polymers, C.sub.4 -C.sub.15 polymethacrylate esters and C.sub.4 -C.sub.15 methacrylate ester copolymers,the blends being prepared bya) the catalytic polymerization of C.sub.2 -C.sub.20 olefins in admixture with up to 99% by weight of C.sub.8 -C.sub.14 aromatic vinyl compounds using a catalyst mixture, at -30.degree. C. to +100.degree. C. under inert conditions in the pressure range of 0.1 bar to 20 bar in the presence of 10 to 2,000% by weight, based on the weight of the C.sub.2 -C.sub.20 olefins and C.sub.8 -C.sub.14 aromatic vinyl compounds, of inert diluent and 0.1% by weight to 10% by weight, based on the weight of the C.sub.2 -C.sub.20 olefins, of the catalyst mixture, the catalyst mixture being 10.sup.-4 % by weight to 10.sup.-2 % by weight of bridged metallocene complexes A, 0.1 to 10% by weight of metalloxane compounds B, 0.001% by weight to 1.0% by weight of metal alkyl compounds C, and up to 10.sup.-2 % by weight of transition metal compounds D, in each case based on the weight of the C.sub.2 -C.sub.20 olefins and C.sub.8 -C.sub.14 aromatic vinyl compounds,bridged metallocene complexes A of the catalyst mixture being metallocene complexes having the formula ##STR8## as well as mixtures of these bridged metallocene complexes, in which R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are hydrogen, (Si-substituted) alkyl, or (Si-substituted) aryl,R.sub.5, and R.sub.6 are hydrogen, halogen, alkyl, or aryl, .OMEGA. is Ti, Zr, Hf, V, Nb, or Ta,each occurrence of .phi. is independently selected from the group consisting of carbon and silicon and n is a whole number from 1 to 6, oreach occurrence of .phi. is independently selected from the group consisting of germanium and tin and n=1,.PSI. is oxygen, sulfur, alkyl- or aryl-substituted N, P or Si or ##STR9## in which R.sub.1, R.sub.2, R.sub.3 and R.sub.4 have the same meanings as in complex A,the metalloxane compounds B being oligomeric or polymeric cyclic or linear metalloxane compounds, or mixtures thereof of metals of the 3rd main group and/or the 4th main group with the general formula (1) or (2) ##STR10## as well as monomeric or oligomeric linear metalloxane compounds of the general formula (3) or (4) ##STR11## in which each occurrence of Me.sup.IV is independently selected from the group consisting of Ge, Sn, and Pb and each occurrence of Me.sup.III is independently selected from the group consisting of B, Al, Ga, and In, R=C.sub.1 -C.sub.18 alkyl, as well as mixtures of metalloxanes selected from the group consisting of metalloxanes of the general formulas (1), (2), (3) and (4),the metal alkyl compounds C being metal alkyls of boron and/or aluminum or mixtures of these metal alkyl compounds,b) subsequently, addition of up to 900%, based on the C.sub.2 -C.sub.20 olefins and C.sub.8 -C.sub.14 aromatic vinyl compounds used in a), of C.sub.4 to C.sub.15 methacrylate esters, of up to 1.0% by weight, based on the weight of the C.sub.2 -C.sub.20 olefins and C.sub.4 -C.sub.15 methacrylate esters used, of metal alkyl compounds E and, of up to 5.times.10.sup.-3 % by weight of bridged metal complexes A, up to 6% by weight of metalloxane compounds B and up to 0.05% by weight of metal alkyl compounds C, in each case based on the weight of the C.sub.2 -C.sub.20 olefins and C.sub.8 -C.sub.14 aromatic vinyl compounds and C.sub.4 -C.sub.15 methacrylate esters,the compounds A, B and C being identical with those compounds named under a),c) subsequently the pressure being maintained in the range recited in a) or being increased up to 50 bar,d) subsequently, the C.sub.8 -C.sub.14 aromatic vinyl compounds, C.sub.4 -C.sub.15 methacrylate esters and unreacted C.sub.2 -C.sub.20 olefins, contained in the reaction mixtures a) and b), being polymerized catalytically at temperatures of -30.degree. C. to 100.degree. C. in the presence of the catalysts contained in the reaction mixtures a) and b),e) subsequently, the catalysts being deactivated by acids and the C.sub.2 -C.sub.20 polyolefins or C.sub.2 -C.sub.20 olefin copolymers and the syndiotactic vinyl polymers being isolated,f) and subsequently, the mixture of C.sub.2 -C.sub.20 polyolefins or C.sub.2 -C.sub.20 olefin copolymers and syndiotactic vinyl polymers being plasticized in extruders or in kneaders for thermoplastic materials at temperatures above the melting temperature of the C.sub.2 -C.sub.20 polyolefins or C.sub.2 -C.sub.20 olefin copolymers.