Patent · US Active

Process for the production of impact-modified filled polycarbonate compositions

US8288456B2 · kind B2 · utility

4Cited by

14References

17Claims

0Family size

Assignee

Bayer MaterialScience AG · DE

Inventors

Achim Feldermann · Düsseldorf, DE
Andreas Seidel · Dormagen, DE
Michael Bierdel · Leverkusen, DE
Reiner Rudolf · Leverkusen, DE

Key dates

Filing date	Aug 27, 2008
Grant date	Oct 16, 2012
Priority date	—
Expiry date	Aug 27, 2028

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08L55/02
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The present invention relates to a process for the production of impact-modified filled polycarbonate compositions and molding compositions. A process of the present invention involves: (i) mixing the CNT (component C) with rubber-containing vinyl copolymer (component B) and/or rubber-free vinyl copolymer (component D) on a twin screw extruder, to obtain a CNT masterbatch, (ii) mixing the CNT masterbatch with polycarbonate (component A) and optionally with Component B and/or Component D and optionally with an additive on a twin screw extruder. A polycarbonate composition prepared according to the present invention does not experience degradation of the molecular weight of the polycarbonate during compounding a compared to processes known in the art.

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