Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1985-04-09
1988-02-02
Smith, Edward J.
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
252404, 524101, 524323, 524335, 525417, C09K 1522
Patent
active
047228067
ABSTRACT:
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. In combination with particular hindered phenols PIP-T compounds are found to provide better antioxidant properties than that obtained as the theoretical additive effect of the PIP-T and the hindered phenol, separately.
REFERENCES:
patent: 3397205 (1968-08-01), Juethi et al.
patent: 4028331 (1977-06-01), Hotta et al.
patent: 4110304 (1978-08-01), Gilg et al.
patent: 4547538 (1985-10-01), Lai
Lai John T.
Son Pyong N.
Csontos Alan A.
Kulkosky Peter F.
Lobo Alfred D.
Smith Edward J.
The B. F. Goodrich Company
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