Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1982-03-05
1983-11-15
Lee, Mary C.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
260239BC, 260239BD, C07D24312, C07D40506, C07D40510, C08K 534
Patent
active
044156847
ABSTRACT:
Novel compositions which are highly stable and resistant to degradation by ultraviolet (UV) light are prepared by dispersing polysubstituted 1,5-diazacycloalkanes in the material subject to degradation, particularly in polyolefins. The cyclic compounds of this invention have (a) a fixed three-carbon bridge between the N.sup.1 and N.sup.5 atoms of the diaza ring, the remaining portion of the ring having a variable length bridge of two or more carbon atoms, (b) an N-adjacent carbon atom of the diaza ring is polysubstituted, that is, has two substituents which may be cyclizable. Monocyclic 1,5-diazacycloalkanes are prepared by reducing the corresponding 2-keto-1,5-diazacycloalkane with metal hydride; bicyclic 1,5-diazacycloalkanes, particularly fused ring bicyclic compounds such as substituted 1,5-decahydrobenzodiazepines are prepared by reaction of a diaminocycloalkane with an unsaturated ketone or acid and reducing with metal hydride.
REFERENCES:
patent: 2899359 (1959-08-01), Fancher et al.
patent: 3557086 (1971-01-01), Cantore
patent: 4007157 (1977-02-01), Ramey et al.
patent: 4207228 (1980-06-01), Lai et al.
Lai John T.
Son Pyong N.
Csontos Alan A.
Lee Mary C.
Lobo Albert D.
Shust Nestor W.
Springer D. B.
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