Method for the preparation of organopolysiloxane by polymerization and rearrangement of cyclic siloxanes
US7776988B2 · kind B2 · utility
1Cited by
3References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 30, 2007 |
| Grant date | Aug 17, 2010 |
| Priority date | — |
| Expiry date | Nov 30, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G77/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention relates to silicon oils, more particularly, to a novel method for the preparation of a silicon oil by polymerization and rearrangement of cyclic siloxanes in the presence of an alkaline catalyst and a co-catalyst which is a cryptand (macroheterobicyclic diamine) acting as a polymerization accelerator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.