Process for the preparation of aromatic bis dialkyl ureas
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 26, 1991
Grant Date -
N/A
app pub date -
Mar 14, 1988
filing date -
Mar 14, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Aromatic bis (dialkyl) ureas such as the bis (dimethyl) urea of 2,4-toluenediamine are prepared by reacting an aromatic diamine with isocyanic acid (HNCO) to convert the amino groups of the diamine to urea groups (--NHCONH.sub.2) to give an aromatic bis urea which is then reacted with a dialkyl amine having from 1 to 8 carbon atoms to produce the desired aromatic bis (dialkyl) urea.
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