Process for the synthesis of N-(hydroxyalkoxy) substituted hindered amine stabilizers

US6166212A · kind A · utility

Assignee

• Ciba Specialty Chemicals Corporation · US

Inventors

• James P. Galbo · Wingdale, US
• Robert Detlefsen · Putnam Valley, US
• Michael P. DiFazio · Mobile, US
• Henry C. Grace · Baton Rouge, US
• Christopher Kuell · Danbury, US

Key dates

• Filing date: May 20, 1999
• Grant date: Dec 26, 2000
• Expiry date: May 20, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D211/94
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

N-(Hydroxyalkoxy) hindered amine stabilizers are prepared by reacting the corresponding N-oxyl compound with a peroxide or organic hydroperoxide and a catalytic amount of a metal salt or metal-ligand complex in an alcohol solvent. These N-(hydroxyalkoxy) hindered amines are particularly useful as stabilizers for polyolefins, thermoplastic polyolefins and automotive coating compositions.