Oligomerization using a solid, unsupported metallocene catalyst system

A process for the production of an oligomer oil comprising:

• (i) polymerizing a feed comprising one or more linear C3 to C20 olefins having at least one hydrogen on the 2-carbon atom, at least two hydrogens on the 3-carbon atom and at least one hydrogen on the 4-carbon (if at least 4 carbon atoms are present in the olefin), in the presence of a solid metallocene catalyst system comprising a bulky ligand transition metal complex component of the stoichiometric Formula 1 and an activator comprising an organoaluminum compound or a hydrocarbylboron compound or a mixture thereof:
• LmMXnX′p Formula 1
• wherein L is the bulky ligand, M is the transition metal, X and X′ may be the same or different and are independently selected from the group consisting of halogen, hydrocarbyl group or hydrocarboxyl group having 1-20 carbon atoms, wherein m is 1-3, n is 0-3, p is 0-3 and the sum of the integers m+n+p corresponds to the transition metal valency, to thereby form a viscous oligomer oil product mixture comprising an essentially terminally unsaturated viscous, essentially 1-olefin-containing poly (1-olefin) or copoly (1-olefin) of molecular weight between about 300 and about 10,000 that exhibits a terminal vinylidene content of more than 50%;
• wherein the aforesaid solid metallocene catalyst system is formed by a process comprising:
• (a) combining at a temperature in the range of from about −40° C. to about 150° C. in a an organic solvent boiling from −40 to 250° C. at atmospheric pressure a soluble metallocene and a soluble activator comprising at least one of an organoaluminum and a hydrocarbylboron to form a soluble metallocene- and activator-containing catalyst system as the combination product;
• and
• (b) removing the aforesaid solvent to thereby form the aforesaid catalyst system as a solid.