Polyester compositions of low residual aldehyde content
US6916881B2 · kind B2 · utility
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12References
13Claims
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Assignee
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Key dates
| Filing date | Jan 13, 2003 |
| Grant date | Jul 12, 2005 |
| Priority date | — |
| Expiry date | Mar 15, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L67/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A mixture of a polyester, such as poly(ethylene terephthalate) PET, and a second polymer which is polyacrylamide, polymethacrylamide or copolymer of acrylamide or methacrylamide 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.