Catalytic solid usable for the stereospecific polymerisation of alpha-olefins, process for preparing it and process for polymerising alpha-olefins in its presence
US5733979A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 18, 1993 |
| Grant date | Mar 31, 1998 |
| Priority date | — |
| Expiry date | Feb 18, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/908
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Catalytic solids based on titanium trichloride complex, usable for the stereospecific polymerisation of alpha-olefins, obtained by heat treatment, in the presence of a halogenated activating agent, of the liquid material resulting from bringing TiCl.sub.4, pretreated with an electron-donor compound, into contact with a composition (C) corresponding to the general formula EQU AlR.sub.p (Y).sub.q X.sub.3-(p+q) in which PA1 R represents a hydrocarbon radical or a hydrogen atom; PA1 Y represents a group chosen from --OR', --SR' and --NR'R", in which R' and R" each represent a hydrocarbon radical or a hydrogen atom; PA1 X represents a halogen; PA1 p is an arbitrary number such that 0<p<3; and PA1 q is an arbitrary number such that 0<q<3; the sum (p+q) being such that 0<(p+q).ltoreq.3. These catalytic solids of controllable porosity permit the production of a wide range of propylene polymers, in particular the propylene and ethylene copolymers known as "block" copolymers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.