Production method of polycarbonate resin
US8865859B2 · kind B2 · utility
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2References
24Claims
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Key dates
| Filing date | Sep 30, 2013 |
| Grant date | Oct 21, 2014 |
| Priority date | — |
| Expiry date | Sep 30, 2033 |
Classification
- Technology area (CPC —)General
Abstract
The present invention is a production method of a polycarbonate resin, including a step of performing melt polycondensation by continuously feeding a dihydroxy compound (A) having a predetermined moiety in a part of the structure and a carbonic acid diester each in a liquid state to a reactor, wherein the residence time from liquefaction of the dihydroxy compound to its feeding to a reactor is from 0.1 to 10 hours.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.