Solvay Polyolefins Europe-belgium

Solvay (societe Anonyme)

Jiang Bian

Michel Promel

Beno&icirc;t Koch

Bernard Van Der Schrick

Olivier Lhost

Charles Detrez

Jacques Breulet

Process for the polymerization of olefines

Ethylene polymer having a blow-up ratio (R ) of at least 1.4, a resistance to crazing under stress (ESCR) of at least 55 h and a melt index (MI ) of at least 0.2 g/10 min. Processes for obtaining this ethylene polymer using different catalytic systems, the first based on titanium and zirconium used in a polymerization in two reactors; the second consisting of a mixture of a titanium catalyst and a titanium and zirconium catalyst, used in a polymerization in two reactors; the third based on chromium on a support comprising at least two constituents chosen from silica, alumina and aluminium phosphates, used in a polymerization in a single or in two reactors.

Ethylene polymer and processes for obtaining it

Ethylene polymer having a die swell ratio (R,) of at least 1.4, a resistance to crazing under stress (ESCR) of at least 55 h and a melt index (MI,) of at least 0.2 g/10 min. Processes for obtaining this ethylene polymer using different catalytic systems, the first based on titanium and zirconium used in a polymerization in two reactors; the second consisting of a mixture of a titanium catalyst and a titanium and zirconium catalyst, used in a polymerization in two reactors; the third based on chromium on a support comprising at least two constituents chosen from silica, alumina and aluminum phosphates, used in a polymerization in a single or in two reactors.

Process for the polymerization of olefins, in which at least one olef in is placed in contact with a catalytic system comprising:

Process for the polymerization of olefins

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Brussels, Belgium

Jiang Bian