Polyester and polyamide compositions of low residual aldehyde content

US6908650B2 · kind B2 · utility

Assignee

• Ciba Specialty Chemicals Corporation · US

Inventors

• Paul A. Odorisio · Leonia, US
• Stephen Mark Andrews · New Fairfield, US
• Dario Lazzari · Bologna, IT
• Dirk Simon · Mutterstadt, DE
• Roswell E. King, III · Pleasantville, US
• Melissa Stamp · Dover, US
• Roger Reinicker · Hockessin, US
• Michael Tinkl · Weil am Rhein, DE
• Natacha Berthelon · Pfastatt, FR
• Daniel Muller · Soisy-sous-Montmorency, FR
• Urs Hirt · Muttenz, CH

Key dates

• Filing date: Jul 24, 2002
• Grant date: Jun 21, 2005
• Expiry date: Feb 25, 2023

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31786
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A mixture of a polyester, such as poly(ethylene terephthalate) PET, or a polyamide, and a suitable stabilizer selected from the group consisting of hydroxylamine stabilizers, substituted hydroxylamine stabilizers, nitrone stabilizers and amine oxide stabilizers, when extrusion compounded exhibits a lower residual acetaldehyde content than does polyester or polyamide alone when similarly treated. The invention pertains to any polyester or polyamide used in the manufacture of molded articles, fibers or films, for instance bottles or containers which are used to store consumer materials, for example food, beverages and water.