Catalyst for the preparation of linear carbon monoxide/alpha-olefin copolymers
US5565547A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 15, 1995 |
| Grant date | Oct 15, 1996 |
| Priority date | — |
| Expiry date | May 15, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2531/824
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Novel catalyst compositions comprising a cationic transition metal complex of the formula EQU (Pd(II)S.sub.4-x L.sub.x).sup.+2 (A).sup.-n y wherein: PA1 Pd(II) is palladium having a valence of +2; PA1 S is a synthesis solvent; PA1 L is a monodendate, bidendate or tridendate ligand or ligands having one or more bonding sites; PA1 x is an integer from 1 to 3 and is equal to the total number of ligand bonding sites; PA1 A is a weakly or non-coordinating anion capable or stabilizing the complex in its cationic form; and PA1 n is 1 or 2 and y is 2 or 1; provided that PA1 (i) when n is 1, y is 2 and when n is 2, y is 1; and PA1 (ii) when the anion A is tetrafluoroborate, the organometallic complex is not (tris(acetonitrile) palladium(II) triphenylphosphine), bis(acetonitrile) palladium(II) bis(triphenylphosphine)), ((acetonitrile) palladium (II) tris(triphenylphosphine)) or (bis(acetonitrile)palladium(II) 1,3-bis (diphenylphosphino)propane). The new catalyst compositions are useful for the copolymerization of carbon monoxide and at least one ethylenically unsaturated hydrocarbon to produce linear alternating polymers. The rate of polymerization is enhanced by including an alcohol, such a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.