DERIVATIVE OF DEMETHYL PHENOL FOR STABILIZING POLYSTYRENE, STYRENE COPOLYMER OR TERPOLYMER, POLYURETHANE OR POLYACETAL AND PROCESS FOR PREPARING THEREOF

摘要

described is the use of at least one derivative of general formula i in which dimethylfenolu, r.sub.1.n. means; or ethylovou group and r.sub.2.n.a alkylovou group with 2 to 30 carbon atoms, to stabilize the polystyrene.terpolymeru copolymer or styrene, polyurethane or polyacetalu in mass quantities of 0.01 to 10% on the weight of polymer against thermal,oxidative or aktinicku00e9mu reduce further derivative 2,4-dimethyl - 6 - sec. method for preparing phenol and derivative catalytic alkylation of 2,4 - xylenol. alpha. - olefiny.u0155