Polyalkyl p-phenylenediamine anti-degradants and intermediates and preparation method thereof
US12172943B2 · kind B2 · utility
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34Claims
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Key dates
| Filing date | Oct 27, 2023 |
| Grant date | Dec 24, 2024 |
| Priority date | — |
| Expiry date | Oct 27, 2043 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/86
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A polyalkyl p-phenylenediamine antidegradant having a structure represented by Formula I, its intermediates and a preparation method thereof are provided. The polyalkyl p-phenylenediamine antidegradant provides good thermal oxidative aging resistance and UV aging resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.