Redistribution of organic polycarbonate compositions
US5414057A · kind A · utility
31Cited by
1References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 1, 1993 |
| Grant date | May 9, 1995 |
| Priority date | — |
| Expiry date | Dec 1, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G64/42
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for the redistribution of an organic polycarbonate composition. The process involves melt equilibrating a starting polycarbonate composition (which may be a single polycarbonate or a mixture of polycarbonates, and may be or include recycled polycarbonate) having an initial weight average molecular weight in the presence of a carbonate redistribution catalyst and in the absence of branching agents, under conditions such that a redistributed polycarbonate composition is formed having a weight average molecular weight different from, and typically lower than, the initial weight.
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