Thermooxidative stabilization of polymers with a N4-alkylated ox

Details Thermooxidative stabilization of polymers with a N4-alkylated ox Thermooxidative stabilization of polymers with a N4-alkylated ox

1990-09-11

1992-03-24

Morgan, Kriellion S.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

C08K 53492

Patent

active

050989448

ABSTRACT:
An oxo-piperazinyl triazine with three piperazinone substituents, each of which has an alkylated N.sup.4 atom ("MPIP-T"), used in an amount no more than 0.2 phr, and without any secondary stabilizer (hence referred to as a "virgin MPIP-T"), and in particular, without any hindered phenol antioxidant, or phosphorous acid ester, simultaneously provides thermooxidative stability and stability against degradation by UV light along with acceptable melt processability. Further, the virgin MPIP-T allows (i) uninterrupted operation of a die or mold while maintaining the surfaces of the cavities essentially contaminant-free; and, (ii) excellent AO stabilization which is equivalent to that obtained with a premier hindered phenol AO, and superior to that obtained with the premier oligomeric piperidinyl-triazine compound, when each stabilizer is used in the same amounts by weight in a thermoplastic synthetic resinous substrate.

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patent: 4780495 (1988-10-01), Lai et al.
patent: 4816507 (1989-03-01), Cantatore

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