Patent · US Active

Polycarbonate having improved thermal and mechanical properties and reduced coefficients of thermal expansion

US9676716B2 · kind B2 · utility

6Cited by

6References

12Claims

0Family size

Assignee

Covestro Deutschland AG · DE

Inventors

Helmut-Werner Heuer · Krefeld, DE
Rolf Wehrmann · Krefeld, DE

Key dates

Filing date	Dec 20, 2010
Grant date	Jun 13, 2017
Priority date	—
Expiry date	Oct 20, 2032

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31507
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

The present invention relates to thermoplastic high-Tg polycarbonates and molding materials which are distinguished by improved thermal properties and improved mechanical properties, in particular by reduced thermal expansion. The present invention furthermore relates to a process for the preparation of these polycarbonates. In particular, this invention relates to polycarbonates which the structural unit which derives from phthalimide of the formula (I) and polycarbonate compositions and molding materials therefrom as well as a process for the preparation of these polycarbonates, and the use thereof, in particular as reflectors and display substrates.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.