C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
400/6404, 400/70
C07D 401/14 (2006.01) C07D 241/08 (2006.01) C07D 403/12 (2006.01) C07D 403/14 (2006.01) C07D 413/14 (2006.01) C08G 73/06 (2006.01) C08K 5/34 (2006.01) C08K 5/3492 (2006.01)
Patent
CA 1195329
ABSTRACT OF THE DISCLOSURE A branched chain polyalkylenepolyamine ("PAPA") amine having plural amine groups including a secondary amine group intermediate terminal primary amine groups and having at least two carbon atoms between each amine group, is reductively alkylated with a ketone to provide a PAPA alkylated only at an unhindered primary amine group. A preselected degree of steric hindrance at amine groups near each end of the chain enables cyclization by the 'ketoform synthesis' by reaction with a ketone in such a manner as to form a polysubstituted piperazinone ("PSP") ring which includes N atoms of proximate primary and secondary amine groups of the alkylated PAPA. The PSP so formed may then be reacted with a reactive triazine ring so that a PSP substituent is linked to the triazine ring through a single N atom and at least two C atoms, to form a 2-oxo-piperazinyl-triazine ("PIP- T"). Oligomers of the PIP-T may be prepared. The PIP-T compounds are excellent stabilizers against ultraviolet (uv) light degradation in light- sensitive synthetic resinous materials.
421028
Lai John T.
Son Pyong N.
Goodrich (b.,f.) Company (the)
Marcoux & Sher Swabey Mitchell Houle
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