Method of reducing acetaldehyde in polyesters, and polyesters therefrom
US8710128B2 · kind B2 · utility
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22Claims
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Key dates
| Filing date | Feb 12, 2010 |
| Grant date | Apr 29, 2014 |
| Priority date | — |
| Expiry date | May 13, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/0008
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Acetaldehyde production in a polyester may be reduced by using a formulation which comprises an acetaldehyde scavenger and a phosphorous additive. The two materials appear to act synergistically in reducing acetaldehyde production. Preferred formulations comprise anthranilamide and phosphorous acid and are used in combination with aluminium or titanium catalysed PET resins.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.