Polymeric phenolic antioxidants
US11987552B2 · kind B2 · utility
0Cited by
8References
17Claims
0Family size
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Key dates
| Filing date | Jul 26, 2019 |
| Grant date | May 21, 2024 |
| Priority date | — |
| Expiry date | Jan 23, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2290/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A phenol compound comprises a phenyl group, a hydroxy group directly bonded to the phenyl group, and at least one polymeric substituent bound to the phenyl group. The polymeric substituent comprises three or more monomers units. A method for producing a polyurethane polymer comprises the steps of (a) providing a polyol; (b) providing a polyisocyanate compound; (c) providing the phenol compound described above; (d) combining the polyol, the polyisocyanate compound, and the phenol compound to produce a reaction mixture; and (e) allowing the polyol and the polyisocyanate compound to react to produce a polyurethane polymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.