Melt catalytic preparation of copolymeric polycarbonate from hydroquinone
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jun 28, 1994
Grant Date -
N/A
app pub date -
Jun 24, 1992
filing date -
Jun 28, 1991
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The present invention relates to a method of preparing a copolymeric polycarbonate which comprises melt-polycondensing a mixture of an aromatic dihydroxy compound comprising hydroquinone or substituted hydroquinones and a diester carbonate in the presence of a catalyst containing alkali metal compounds and/or alkaline earth metal compounds.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
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