Process for producing raw polycarbonate resin material and producing polycarbonate resin
US6476179B1 · kind B1 · utility
2Cited by
0References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 13, 2001 |
| Grant date | Nov 5, 2002 |
| Priority date | — |
| Expiry date | Nov 13, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G64/24
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to an inexpensive and simple method for producing a starting material for polycarbonate resin and for producing polycarbonate resin. In the method for producing a starting material for polycarbonate resin production through interfacial polymerization, (I) a molten bisphenol compound is mixed and dissolved in an aqueous alkali solution at 20 to 80° C., or (II) it is, without being solidified, directly mixed with water to be in liquid at a temperature not higher than the melting point of the bisphenol compound, and then dissolved in an aqueous alkali solution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.