| abstract |
A spray-dried composition comprising a mineral oil porridge, a particulate filler comprising pyrogenic silica treated with dimethyldisilyl dichloride, a metallocene catalyst compound, and a catalyst compound that is represented by the formula: wherein M is a Group 4, 5 or 6 metal, each X is independently an anionic leaving group; n is the oxidation state of M; m is the formal charge of the ligand comprising Y, Z and L; And it is an atom of Group 15; Z is an atom of Group 15; L is an atom of Group 15; R1 and R2 are independently a C1 to C20 hydrocarbon group, or a heteroatom-containing group in which the heteroatom is tin, lead, or phosphorus; optionally, R1 and R2 are interconnected with each other; R3 is absent or is hydrogen, a group containing group 14 atom, a halogen, or a group containing heteroatom; R4 and R5 are independently an alkyl group, an aryl group, a substituted aryl group, a cyclic alkyl group, a substituted cyclic alkyl group, or a multiple ring system; and R6 and R7 are independently absent, or are hydrogen, an alkyl group, a halogen, a heteroatom, a hydrocarbyl group, or a heteroatom-containing group. |