Solvay Polyolefins Europe-belgium

Solvay (societe Anonyme)

Solvay Sa

Solvay Polyolefins Europe-belgium (societe Anonyme)

Solvay Polyolefins Europe - Belgium (societete Anonyme)

Sabine Pamart

Jean-Louis Costa

Herve Collette

Gaetane Hallot

Serge Bettonville

Catalytic system which can be used for the polymerisation of .alpha.-olefins comprising:

Catalytic system which can be used for the stereospecific polymerisation

Catalytic system which can be used for the polymerization of .alpha.-olefins comprising:

Catalytic system which can be used for the stereospecific polymerization

Catalyst systems comprising, on the one hand, a catalytic solid based on complexed titanium trichloride and, on the other hand, a nonhalogenated organoaluminium activator. When employed in gas phase olefin polymerisation processes, these catalyst systems make it possible to manufacture a wide range of homopolymers and copolymers (random and block) with an isotacticity index which can be adjusted to very low values and with excellent pourability, even in the case of copolymers of high comonomer content. In the absence of transfer agents they also make it possible to synthesize polymers of very high molecular masses, with an increased activity. These polymerization processes yield particularly advantageous results in the case of propylene.

Block copolymer of propylene and ethylene

Catalyst systems comprising, on the one hand, a catalytic solid based on complexed titanium trichloride and, on the other hand, a nonhalogenated organolauminium activator. When employed in gas phase olefin polymerization processes, these catalyst systems make it possible to manufacture a wide range of homopolymers and copolymers (random and block) with an isotacticity index which can be adjusted to very low values and with excellent pourability, even in the case of copolymers of high comonomer content. In the absence of transfer agents they also make it possible to synthesise polymers of very high molecular masses, with an increased activity. These polymerization processes yield particularly advantageous results in the case of propylene.

Catalyst system for the polymerization of olefins; process for this

Catalyst systems comprising, on the one hand, a catalytic solid based on complexed titanium trichloride and, on the other hand, a nonhalogenated organoaluminium activator. When employed in gas phase olefin polymerization processes, these catalyst systems make it possible to manufacture a wide range of homopolymers and copolymers (random and block) with an isotacticity index which can be adjusted to very low values and with excellent pourability, even in the case of copolymers of high comonomer content. In the absence of transfer agents they also make it possible to synthesize polymers of very high molecular masses, with an increased activity. These polymerization processes yield particularly advantageous results in the case of propylene.

Catalyst system for the polymerization of olefins, process for this

Catalytic solids based on titanium trichloride complex, usable for the stereospecific polymerisation of alpha-olefins, obtained by heat treatment, in the presence of a halogenated activating agent, of the liquid material resulting from bringing TiCl.sub.4, pretreated with an electron-donor compound, into contact with a composition (C) corresponding to the general formula

Catalytic solid usable for the stereospecific polymerisation of

Catalytic composition which may be used for the polymerization of alpha-olefins, comprising:

Catalytic system which may be used for the polymerization of

Catalytic solids based on titanium trichloride complex, usable for the stereospecific polymerization of alpha-olefins, obtained by heat treatment, in the presence of a halogenated activating agent, of the liquid material resulting from bringing TiCl.sub.4, pretreated with an electron-donor compound, into contact with a composition (C) corresponding to the general formula

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Mons, Belgium

Sabine Pamart