Piperazinone derivatives

Details Piperazinone derivatives Piperazinone derivatives

2006-09-19

2006-09-19

Yoon, Tae H. (Department: 1714)

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

Synthetic resins

Processes of preparing a desired or intentional composition...

C524S100000, C544S198000

Reexamination Certificate

active

07109259

ABSTRACT:
A compound of the formula (I)whereinn is preferably 3;G1, G2, G3and G4are independently of one another e.g. C1–C4alkyl;A1is e.g. hydrogen or methyl;A2is e.g. methylene;A3′ and A3″ are e.g. C1–C4alkyl;A4is e.g. C1–C8alkyl;Y is e.g. a group of the formula (IV) wherein R1is e.g. hydrogen or methyl, R2is e.g. methylene, R3′ and R3″ are e.g. C1–C4alkyl and R4is e.g. hydrogen or C1–C8alkyl; andZ is e.g. a group of the formula (VI) with A10′ and A10″ being independently of one another e.g. hydrogen or C1–C4alkyl and A11′ and A11″ being independently of one another e.g. C2–C6alkylene,is useful for stabilizing an organic material against degradation induced by light, heat or oxidation.

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