Catalysts for the polymerization of olefins
US4978648A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 27, 1989 |
| Grant date | Dec 18, 1990 |
| Priority date | — |
| Expiry date | Sep 27, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F10/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Catalysts for the polymerization of olefins, particularly alpha-olefin of the formula CH.sub.2 .dbd.CHR in which R is an alkyl radical with 1-6 carbon atoms or an aryl radical, obtained by the reaction of: PA1 (a) an Al-alkyl compound; PA1 (b) an ether containing at least two ether groups which can form complexes with anhydrous magnesium dichloride, under standard conditions of reaction, in an amount less than 60 mmol per 100 g Mg dichloride; and PA1 (c) a solid catalyst component comprising an anhydrous magnesium dihalide in active form and having supported thereon a titanium compound containing at least a Ti-halogen bond and an electron-donor compound which is at least 70 mole % extractable with Al-triethyl, under standard conditions of extraction, component wherein the solid, after extraction, has a surface area of more than 20 m.sup.2 g.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.