Components and catalysts for the polymerization of olefins
US4472524A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 10, 1983 |
| Grant date | Sep 18, 1984 |
| Priority date | — |
| Expiry date | Feb 10, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/903
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Catalysts for the polymerization of alpha-olefins, comprising the product of the reaction between: PA1 (a) a metalorganic Al compound; PA1 (b) an electron-donor compound reactive towards MgCl.sub.2 but which results not to be completely complexed with Al-triethyl at the equivalent point of the potentiometric titration under standard conditions; PA1 (c) a solid comprising a halogenated Ti compound supported on an anhydrous Mg halide and at least one of the following activators: PA2 (1) an Al, Fe, Mn, Sb or Zn compound containing at least one metal-halogen bond; PA2 (2) a complex between an electron-donor compound and a Lewis acid chosen among the halides of the metals of Groups II-VIII of the Periodic System other than Ti; PA2 (3) a compound or composition, inert towards the Mg halide, having a dielectric constant at 20.degree. C. higher than 2; compounds (1), (2) and (3) being extractable from the solid for at least 30% by mols by treatment with toluene at 80.degree. C. for 2 hours, and the surface area of the solid after extraction being higher than 20 m.sup.2 /g.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.