Hindered piperidine polymer stabilizers

US4407993A · kind A · utility

Assignee

• Sandoz AG · CH

Inventors

• Hans Hinsken · Lörrach, DE
• Wolfgang Mueller
• Hermann Schneider · Schweich, DE

Key dates

• Filing date: Mar 15, 1982
• Grant date: Oct 4, 1983
• Expiry date: Mar 15, 2002

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K5/3435
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

N-(.beta.-aminoethyl)-3-hydroxy-1,1,6,6-tetramethyl-piperidine and certain of its N- and O-substituted derivatives are useful as light stabilizers for polymeric materials, particularly for thermoplastic polymers and automotive finishes. Preferred compounds include the N-, O-diacyl derivatives.