Method of producing a composite material comprising a perovskite complex compound having an .alpha.-olefin polymer deposited thereon
US5057478A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 21, 1990 |
| Grant date | Oct 15, 1991 |
| Priority date | — |
| Expiry date | Feb 21, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S502/525
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An .alpha.-olefin polymerization catalyst which comprises a perovskite type complex compound comprising a perovskite type compound represented by the formula EQU ABO.sub.3 wherein A is at least one element selected from the group consisting of alkaline earth metals and Pb, and B is at least one element selected from the group consisting of Ti, Zr, Hf and Sn; the complex compound further containing at least one oxide of element selected from the group consisting of rare earth elements, transition elements, Bi, Sb and Sn doped in the perovskite type compound in an amount of 0.1-3 mol %. A composite material which comprises the catalyst having an .alpha.-olefin polymer deposited thereon, is useful as, for example, a dielectric ceramic material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.