Components and catalysts for the polymerization of olefins

Details Components and catalysts for the polymerization of olefins Components and catalysts for the polymerization of olefins

1996-09-11

1998-03-10

Smith, Edward J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

5261248, 5261254, 5261255, 5263486, 526352, C08F 4654, C08F 1002

Patent

active

057262616

ABSTRACT:
The present invention relates to spherical solid components of catalysts for the polymerization of olefins comprising, supported on a magnesium dihalide in active form, a titanium compound containing at least one Ti-halogen bond and one OR group, said OR group being bonded to Ti in an amount such that the OR/Ti molar ratio is greater than or equal to 0.5; optionally the component also comprises an electron donor compound. The spherical solid components of the invention are characterized by having a porosity comprised between 0.35 and 0.7 cm.sup.3 /g and by a pore size distribution such that at least 50% of the porosity is due to pores having an average radius greater than 800 .ANG..

REFERENCES:
patent: 4399054 (1983-08-01), Ferraris et al.
patent: 4421674 (1983-12-01), Invernizzi et al.
patent: 4517307 (1985-05-01), Cuffiani et al.
patent: 4721763 (1988-01-01), Bailly et al.
patent: 5221651 (1993-06-01), Sacchetti et al.

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