Water-soluble or dispersible polyester resins made from terephthalate plastic materials useful as dispersant resins for inks
US11236213B2 · kind B2 · utility
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10References
22Claims
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Assignee
Inventors
Key dates
| Filing date | Jan 6, 2020 |
| Grant date | Feb 1, 2022 |
| Priority date | — |
| Expiry date | Jan 6, 2040 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/62
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention provides water-soluble or water-dispersible polyester resins prepared by depolymerizing a terephthalate plastic material in an alcoholysis/glycolysis reaction, and re-polymerizing the product by reacting with a polybasic acid and/or anhydride. The polyester resins of the invention contain 70% to 95% by weight of the terephthalate material, based on the total weight of the composition. The polyester resins of the present invention are useful as dispersants, for example in pigment preparations, and as binders in let-down varnishes, inks, coatings, etc, and as adhesion promoters in aqueous-based inks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.