Organoaluminoxy product, catalyst systems, preparation, and use

A process for preparing a solid catalyst system comprising

• reacting an organoaluminoxane and an ene-ol compound wherein said organoaluminoxane is represented by the formula ##STR2## wherein each R is a hydrocarbyl group containing 1 to 12 carbon atoms and n is a number in the range of from 2 to 50;and
• wherein said ene-ol compound contains at least one hydroxy group, at least one carbon-carbon double bond, and contains from 3 to 24 carbon atoms,
• (b) combining the product of step (a) with at least one transition metal-containing catalyst to form a catalyst system,
• (c) prepolymerizing said catalyst system in a liquid in the presence of at least one olefin containing 2 to 18 carbon atoms,
• (d) separating the resulting solid catalyst from the liquid and the components contained in the liquid to yield said solid catalyst system,
• wherein said at least one transition metal-containing catalyst is represented by the formula
• ML.sub.x,
• wherein M is a Group IVB or VB transition metal, x is the valence of the transition metal, and each L is individually selected and is a hydrocarbyl group containing 1 to 12 carbon atoms, alkoxy group containing 1 to 12 carbon atoms, aryloxy group containing 6 to 12 carbon atoms, halogen, hydrogen, amido, or a ligand containing at least one cyclopentadienyl-type group, and
• wherein said cyclopentadienyl-type group is unsubstituted cyclopentadienyl, substituted cyclopentadienyl, unsubstituted indenyl, substituted indenyl, unsubstituted fluorenyl, or substituted fluorenyl, wherein the substituents are hydrocarbyl groups containing 1 to 12 carbon atoms, alkoxy groups containing 1 to 12 carbon atoms, silyl groups, alkyl halide groups where the alkyl contains 1 to 12 carbon atoms, or halogen.