Patent ID: 6057258
Filing Date: 2000-05-02
Classification: C08F

Abstract:
Process for the preparation of a solid catalytic component for the polymerization or copolymerization of olefins, comprising the steps of:a step (a) of reaction between a support in the form of particles of a porous inorganic oxide exhibiting hydroxyl groups at its surface and a halogenated derivative which can be represented by the formula R.sup.1 M.sup.1 X.sup.1.sub.3, in which R.sup.1 represents a hydrocarbon radical, M.sup.1 represents a silicon, germanium or tin atom and X.sub.1 represents a halogen atom, in order to obtain a solid S.sup.1, thena step (b) of reaction between the solid S.sup.1 and a compound C capable of grafting at least one group with the cycloalkadienyl skeleton L to the atom M.sup.1 belonging to the species fixed to the support and resulting from R.sup.1 M.sup.1 X.sup.1.sub.3, at least one of the carbon atoms of the ring of the cycloalkadienyl radical being bonded to at least one hydrogen atom, in order to obtain a solid S.sup.2, thena step (c) of reaction between the solid S.sup.2 and a deprotonating agent D which can be represented by the formula R.sup.2 M.sup.2 X.sup.2.sub.n, in which R.sup.2 represents a hydrocarbon atom or a hydrocarbon group, M.sup.2 represents a lithium, sodium, potassium or magnesium atom, X.sup.2 represents a halogen atom and n represents a number equal to 0, if M.sup.2 is a lithium, sodium or potassium atom, or equal to 1, if M.sup.2 is a magnesium atom, in order to obtain a solid S.sup.3, thena step (d) of reaction between the solid S.sup.3 and a derivative of a transition metal of formula R.sup.3.sub.y-z M.sup.3 X.sub.z, in which R.sup.3 represents a hydrocarbon radical, M.sup.3 represents a transition metal from groups 4, 5, 6, 7, 8, 9 and 10 of the periodic classification of the elements, X represents a halogen and y and z represent integers, y being equal to 3 or 4 and z ranging from 1 to y.