Patent · US Expired

Mixtures of cyclic oligocarbonates, their production and use

US6156871A · kind A · utility

1Cited by

8References

8Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Burkhard Kohler · Leverkusen, DE
Duane B. Priddy, Jr. · Midland, US
Yun Chen · Krefeld, DE
Harald Pielartzik · Pittsburgh, US
Robert J. Kumpf · Pittsburgh, US

Key dates

Filing date	Sep 4, 1997
Grant date	Dec 5, 2000
Priority date	—
Expiry date	Sep 4, 2017

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G64/30
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The present invention relates to mixtures of cyclic oligocarbonates, to their production by way of mixtures of bischloroformates, and to their use for the production of linear polycarbonates and for the modification of other linear polycarbonates.

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