Production method of polycarbonate, and polycarbonate pellet
US8785565B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2013 |
| Grant date | Jul 22, 2014 |
| Priority date | — |
| Expiry date | Sep 30, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G64/305
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to a method for producing a polycarbonate having excellent characteristics such as hue and mechanical properties with a stable quality and a high yield by solving a plurality of problems as those described above in producing a polycarbonate by using a specific dihydroxy compound exhibiting low thermal stability as compared with bisphenols and having a —CH2—O— structure. The polycarbonate obtained by polycondensation in the present invention is a polycarbonate having an appropriate viscosity despite decrease in the reaction temperature, providing for a color tone less susceptible to yellowing, and exhibiting excellent mechanical properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.