Naphthofuranylnaphthol stabilizers

Details Naphthofuranylnaphthol stabilizers Naphthofuranylnaphthol stabilizers

C - Chemistry, Metallurgy

07

D

6/120, 31/73, 40

C07D 307/92 (2006.01) C08J 3/20 (2006.01) C08K 5/1535 (2006.01) C09K 15/06 (2006.01)

Patent

CA 1070702

ABSTRACT OF THE DISCLOSURE Naphthofuranylnaphthols are produced by (1) react- ing glyoxal with a naphthol in the presence of an acidic catalyst to form an acetal, and (2) thereafter partially hydrolyzing the acetal with an acidic or basic catalyst. Naphthofuranylnaphthols are effective stabilizers of organic materials against the deleterious effects of oxygen, heat, and light. The stability of dienic polymers and styrene- acrylonitrile copolymers is particularly enhanced by incor- porating stabilizing amounts of naphthofuranylnaphthols.

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