Olefine polymerization catalyst incorporating an organo-phosphorus compound
US3969269A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 3, 1974 |
| Grant date | Jul 13, 1976 |
| Priority date | — |
| Expiry date | Jun 3, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F110/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An olefine polymerization catalyst comprising (1) a solid compound of a transition metal wherein the said metal has a valency below its maximum, (2) an organo-metallic compound of aluminium, or of a non-transition metal of Group II of the Periodic System, or a complex of an organo-metallic compound of a non-transition metal of Group I or II of the Periodic System and an organo-aluminium compound; and (3) a trivalent phosphorus compound of the formula EQU PR'.sub.3-n (X-A-Y).sub.n Wherein PA1 R' is halogen, a hydrocarbyl group or the group --NR.sub.2 or --OR; PA1 X is --O--, --S--, or --NR--; PA1 A is a bivalent organic radical such that X and Y are separated by not more than 3 carbon atoms; PA1 Y is --OR, --SR, --NR.sub.2, --PR.sub.2 or a heterocyclic ring system whereof the heteroatom is O, S, N or P; and PA1 n is 1, 2 or 3. The phosphorus compound can be ball-milled with the transition metal component of the catalyst. The catalyst may also include an electron donor compound of a known type such as isoquinoline, tetramethylene-diamine or triphenyl phosphone oxide. When used to polymerize olefine monomers such as propylene, the production of soluble polymer is decreased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.