Polyester compositions of low residual aldehyde content

US6191209A · kind A · utility

Assignee

• Ciba Specialty Chemicals Corporation · US

Inventors

• Stephen Mark Andrews · New Fairfield, US
• Dario Lazzari · Bologna, IT
• Paul A. Odorisio · Leonia, US
• Dirk Simon · Mutterstadt, DE

Key dates

• Filing date: Jun 26, 2000
• Grant date: Feb 20, 2001
• Expiry date: Jun 26, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L67/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A mixture of a polyester, such as poly(ethylene terephthalate) PET, and a second polymer which is poly(vinyl alcohol) or an ethylene/vinyl alcohol copolymer when extrusion compounded exhibits a lower residual acetaldehyde content than does PET alone when similarly treated. The invention pertains to any polyester used in the manufacture of bottles or containers which in turn are used to store consumer materials, especially food, beverages and most especially water.