Polycarbonate with low chlorine content and a method of making and analyzing the same
US10544259B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Aug 31, 2016 |
| Grant date | Jan 28, 2020 |
| Priority date | — |
| Expiry date | Sep 19, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/442
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An aromatic polycarbonate, having an aromatic polycarbonate backbone, can comprise: less than or equal to 5 ppm of polymeric chlorine attached to the aromatic polycarbonate backbone; less than 0.5 ppm of dichloromethane, less than 5 ppm of monohydric phenols, and less than 0.5 ppm of aromatic compounds containing no chlorine based on the total weight of the aromatic polycarbonate, wherein the aromatic compounds are compounds other than the aromatic polycarbonate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.