Monomer solution for producing polycarbonate
US7619053B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 26, 2008 |
| Grant date | Nov 17, 2009 |
| Priority date | — |
| Expiry date | Mar 26, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/173845
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A non-reactive monomer mixture has a monomer component dispersed in a melted diaryl carbonate. The monomer component has one or more monomer compounds having a melting point below the melting point of the diaryl carbonate. Furthermore, the monomer component has less than 600 ppb alkali metal, an acid stabilizer, or both less than 600 ppb alkali metal and an acid stabilizer. The monomer compounds of the monomer component and the diaryl carbonate are present in a mole ratio of from 0.9 to 1.1. The monomer mixture is at a temperature between the melting temperature of the lowest melting monomer compound and the melting temperature of the diaryl carbonate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.