C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
400/7082, 260/26
C07D 241/08 (2006.01) C07D 241/44 (2006.01) C07D 243/08 (2006.01) C08G 18/32 (2006.01) C08G 18/38 (2006.01) C08K 5/34 (2006.01) C08K 5/3442 (2006.01) C08K 5/3462 (2006.01)
Patent
CA 1214464
ABSTRACT Novel compounds have been discovered in which a bis com- pound of a polysubstituted 2-keto-1,4-diazacycloalkane ("2KDZC") provides a diurethane bridge so as to form an oligomeric 2KDZC- urethane ("2K-U" oligomer) having from 2 to about 15 repeating units; the bis compound bridge itself consists essentially of two distally linked polysubstituted 2KDZC moieties, and the 2K-U oligomer formed consists essentially of two 2KDZC moieties linked through their N1 atoms, which moieties in turn are distally linked to urethane groups through the N atoms of the 2KDZC. Such 2K-U oligomers unexpectedly contain a self-limiting number of 2K-U repeating units which happens to provide 2K-U oligomers which are desirable and highly effective u-v light stabilizers in organic materials; more specifically, this invention provides a novel class of polymeric hindered amine-urethane derivatives, particularly piperazinone bis compounds which may be distally linked to each other in a single step reaction utilizing an appropriately substituted diamine, a haloform such as bromoform or chlorform, in one of several known syntheses for making 2-keto- diazacycloalkanones, some of which syntheses may preferably utilize a phase transfer catalyst; this bis compound may then be hydroxyalkylated and reacted with an appropriate diisocyanate.
425595
Lai John T.
Son Pyong N.
Goodrich (b.,f.) Company (the)
Marcoux & Sher Swabey Mitchell Houle
LandOfFree
2-keto-diazacycloalkane-urethane oligomers and uv light... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with 2-keto-diazacycloalkane-urethane oligomers and uv light..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and 2-keto-diazacycloalkane-urethane oligomers and uv light... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1301681