Liquid modified PET polyesters for lithographic inks
US10995193B2 · kind B2 · utility
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1References
6Claims
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Key dates
| Filing date | May 22, 2017 |
| Grant date | May 4, 2021 |
| Priority date | — |
| Expiry date | Jul 13, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/62
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention is directed to a method of making liquid polyester resins, and the liquid polyester resins produced by the method. The liquid polyester resins are prepared by depolymerizing virgin, scrap, recycled or reclaimed polyethylene terephthalate (PET) via an alcoholysis reaction with one or more mono-alcohols and/or polyols; transesterifying the resulting polyol oligomer with vegetable oils or fatty acid alkyl esters; and re-polymerizing with acids or anhydrides. The present invention also provides ink and coating compositions, and overprint varnishes, comprising the liquid polyester resins of the invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.