Patent · US Expired

Polyester compositions of low residual aldehyde content

US6790499B2 · kind B2 · utility

11Cited by

14References

20Claims

0Family size

Assignee

Ciba Specialty Chemicals Corporation · US

Inventors

Stephen Mark Andrews · New Fairfield, US
Paul A. Odorisio · Leonia, US
Dirk Simon · Mutterstadt, DE

Key dates

Filing date	Dec 20, 2001
Grant date	Sep 14, 2004
Priority date	—
Expiry date	Dec 20, 2021

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/1397
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A mixture of a polyester, such as poly(ethylene terephthalate) PET, and an additive combination, when extrusion compounded exhibits a lower residual acetaldehyde content than does PET alone when similarly treated. The additive combination comprises compounds selected from at least two groups wherein the groups are (i.) poly(vinyl alcohol) or ethylene/vinyl alcohol copolymer, (ii.) polyhydric alcohols and (iii.) polyacrylamide, polymethacrylamide or copolymer of acrylamide or methacrylamide. 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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.