Activated starter mixtures and the processes related thereto
US6835801B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 19, 2002 |
| Grant date | Dec 28, 2004 |
| Priority date | — |
| Expiry date | Feb 4, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/2663
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention is directed to an activated starter mixture which can be used to prepare polyoxyalkylene polyols. The present invention is also directed to a process for preparing an activated starter mixture, particularly, to a process for preparing an activated starter mixture which is composed of a low molecular weight starter compound. The present invention is also directed to a batch or semi-batch process for the polyaddition of an alkylene oxide on to an activated starter mixture, particularly, on to an activated starter mixture which is composed of a low molecular weight starter compound.The present invention provides an activated starter mixture, particularly, an activated starter mixture which is composed of a low molecular weight starter compound, which rapidly initiates polymerization. The present invention can eliminate the need to synthesize costly high molecular weight starter compounds by KOH catalysis in a separate, dedicated reactor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.