Process for polymerizing alpha-olefins
US6495640B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 10, 2000 |
| Grant date | Dec 17, 2002 |
| Priority date | — |
| Expiry date | Mar 10, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/943
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Process for polymerizing alpha-olefins, in which at least one alpha-olefin is placed in contact, under polymerizing conditions, with a catalytic system comprising(a) a solid catalyst comprising (i) a compound of a transition metal from groups 4 to 6 of the Periodic Table, containing at least one cyclopentadiene ligand which may be substituted, (ii) an activator chosen from aluminoxanes and ionizing agents, and (iii) a porous polymeric support, and(b) at least one organoaluminium compound corresponding to the general formula R3−nAl(Y′)n in which 0.9<n≦3; Y′ represents a group chosen from —OR′, —SR′ and —NR′R″; R and R′ independently represent an alkyl group comprising from 1 to 20 carbon atoms, an aryl, alkylaryl or arylalkyl group comprising from 6 to 30 carbon atoms, and R″ represents a hydrogen atom, an alkyl group comprising from 1 to 20 carbon atoms or an aryl, alkylaryl or arylalkyl group comprising from 6 to 30 carbon atoms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.