Chemical composition based on titanium trihalide, a method for its preparation, and a process for the polymerization or copolymerization of unsaturated compounds which uses this composition
US4379074A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Dec 5, 1980 |
| Grant date | Apr 5, 1983 |
| Priority date | — |
| Expiry date | Dec 5, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2410/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
This application relates to a process for the homopolymerization (or copolymerization) of unsaturated compounds, particularly ethylene and higher alpha olefines, to give homopolymers (or copolymers) having a wide molecular weight distribution. The polymerization yields are very high, even at relatively low pressures (10 bars), i.e. such as not to require scrubbing in order to remove the catalytic residue from the polymer. These results are obtained by using, in union with an organometallic aluminium compound, a catalyst in the form of a new titanium trihalide-based chemical composition satisfying the following formula: EQU TiX.sub.3.mM'Y.sub.n.qM"Y'.sub.p.cAlY".sub.3-s R.sub.s in which X is a halogen; PA1 M' and M", which are different from each other, are metals chosen from Mg, Al, Ti, Zr, Mo, V, Mn, Cr, Fe and Zn; PA1 Y, Y', Y", which are the same or different from each other, are halogens which can be the same as or different from X; PA1 m and q can be zero or greater than zero, but cannot be both simultaneously equal to zero; PA1 c is always greater than zero; PA1 n and p represent the valencies of M' and M" respectively; PA1 s can assume all values from 0 to 3; and R is a hydr…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.