Alkylated polyalkylenepolyamines, substituted oxo-piperazinyl-tr

Details Alkylated polyalkylenepolyamines, substituted oxo-piperazinyl-tr Alkylated polyalkylenepolyamines, substituted oxo-piperazinyl-tr

1984-10-26

1985-10-15

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

C08K 534

Patent

active

045475385

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 synthethic resinous materials.

REFERENCES:
patent: 3591521 (1971-07-01), Nobukuni et al.
patent: 4051137 (1977-09-01), Ramey et al.
patent: 4108829 (1978-08-01), Cassandrini et al.
patent: 4400505 (1983-08-01), Loffelman et al.
patent: 4480092 (1984-10-01), Lai et al.

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