Process for the preparation of ethylene-propylene- diene...

Details Process for the preparation of ethylene-propylene- diene... Process for the preparation of ethylene-propylene- diene...

C - Chemistry, Metallurgy

08

F

402/419

C08F 4/642 (2006.01) C08F 4/658 (2006.01) C08F 210/16 (2006.01) C08F 210/18 (2006.01)

Patent

CA 1274049

ABSTRACT Ethylene-propylene-diene terpolymers are prepared by the polymerization of mixtures or the three monomers, carried out in the presence or catalysts comprising: (A) a solid catalytic component containing at least on its surface compounds or mixtures of compounds comprising Mg, Ti, halogens and an electron-donor compound characterized in that at least 50% by weight of Ti compounds present in it are insoluble in Ti tetrachloride at 80°C, and that the surface area after extraction by TiCL4 is greater than 40m2/g, and (B) an organometallic compound of aluminium. In particular, the component (A) comprises a titanium tetrahalide and an electron-donor compound, supported on anhydrous MgCL2 or MgBr2 in active form, the X-ray diffraction spectrum of which shows, in lieu of the highest-intensity line appearing in the normal dihalide spectrum, a halo having an intensity maximum shifted relatively to the d distance of such line.

509634

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