BENZOFURANYLPHENOL STABILIZERS

摘要

Benzoruranylphenols are produced by (1) reacting glyoxal with a phenol in the presence of an acidic catalyst to form an acetal, and (2) thereafter partially hydrolyzing the acetal with an acidic or basic catalyst. Some benzofuranylphenols are effective stabilizers of organic materials against the deleterious effects of oxygen, heat and light. the stability of dienic polymers and styrene-acrylonltrile copolymers is particularly enhanced by incorporating stabilizing amounts of some benzofuranylphenols.