Process for the photo-polymerisation of cyclic olefins using a thermostable molybdenum or tungsten catalyst
US5753721A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 16, 1996 |
| Grant date | May 19, 1998 |
| Priority date | — |
| Expiry date | May 16, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB33Y70/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for photocatalytic polymerisation of a cyclic olefin or of at least two different cyclic olefins in the presence of a metal compound as catalyst, which process comprises carrying out a photochemically induced ring-opening metathesis polymerisation in the presence of a catalytic amount of at least one thermostable molybdenum (VI) or tungsten (VI) compound which contains at least two methyl groups or two monosubstituted methyl groups lacking .beta.-hydrogen atoms in the substituent and which are bonded to the metal atom. The process may be carried out by first irradiating and terminating the polymerisation by heating. The process is suitable for fabricating moulded articles, coatings and relief images.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.