US Patent 11987552 Polymeric phenolic antioxidants

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.