Process for purifying polycarbonate resin solution
US6384185B1 · kind B1 · utility
2Cited by
2References
13Claims
0Family size
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Key dates
| Filing date | Jan 5, 2000 |
| Grant date | May 7, 2002 |
| Priority date | — |
| Expiry date | Jan 5, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G64/406
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for purifying a polycarbonate resin solution which comprises passing a water-in-oil dispersion type (W/O) emulsion composed of a mixture of an organic solvent solution containing a polycarbonate resin with a aqueous solution and having water particles with an average diameter of 1 to 100 &mgr;m in an oil through a metallic filter having a filtering precision of 10 to 200 &mgr;m, and then, settling the mixture for 1 to 30 minutes to perform separation between the organic solvent solution containing a polycarbonate resin and the aqueous solution containing contaminations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.