Piperazinone derivatives

US6596461B1 · kind B1 · utility

Assignee

• Ciba Specialty Chemicals Corporation · US

Inventors

• Dario Lazzari · Bologna, IT
• Mirko Rossi · San Lazzaro di Savena, IT
• Graziano Zagnoni · Vergato, IT
• Alessandro Zedda · La Spezia, IT
• Valerio Borzatta · Bologna, IT
• Stephen Mark Andrews · New Fairfield, US

Key dates

• Filing date: May 22, 2001
• Grant date: Jul 22, 2003
• Expiry date: May 22, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S430/108
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A compound of formula (I) wherein n is e.g. a number from 2 to 50; R5′ and R5″ are e.g. a group of formula (II); G1, G2, G3 and G4 are e.g. C1-C4akyl; R1 is e.g. hydrogen or C1-C4alkyl; R2 is e.g. methylene; R3′ is e.g. hydrogen and R3″ is e.g. hydrogen or C1-C4alkyl; R4 is e.g. C2-C8alkylene; and X is e.g. —N(R7)R8) with R7 and R8 being independently of one another hydrogen or C1-C8alkyl, is useful for stabilizing an organic material against degradation induced by light, heat or oxidation.