Polycarbonates made using high activity catalysts
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 17, 2000
Grant Date -
N/A
app pub date -
Jun 9, 1999
filing date -
Aug 4, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Polycarbonates having M.sub.n ranging from about 5,000 to about 40,000 and a molecular weight distribution ranging from 1.05 to 2.0 are prepared from epoxides and CO.sub.2 using a catalyst which has a Zn center and two ligands where one of the ligands is a propagating group and the other of the ligands is not a propagating group and an activity of at least one turnover per hour, preferably at least 100 turnovers per hour. Preferred catalysts have a ##STR1## moiety with group on each nitrogen containing a phenyl moiety.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully