Mixed waste plastics compatibilizers for asphalt
US12227459B2 · kind B2 · utility
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12Claims
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Key dates
| Filing date | Feb 11, 2022 |
| Grant date | Feb 18, 2025 |
| Priority date | — |
| Expiry date | Aug 9, 2043 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/62
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An asphalt modifier includes bitumen, polyolefin particles, and one or more alkyl terephthalamides. Preparing an asphalt modifier includes combining one or more alkyl terephthalamides, polyolefin particles, and bitumen, and dispersing the polyolefin particles in the bitumen to yield the asphalt modifier. Digesting polyethylene terephthalate includes combining polyethylene terephthalate with an alkylamine or carboxyalkylamine to yield a reaction mixture, and heating the reaction mixture to a temperature between about 20° C. and about 300° C. to yield an alkyl terephthalamide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.