Naphthofuranylnaphthol stabilizers
AssigneeThe B. F. Goodrich Company
InventorRobert W. Layer
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Abstract
Naphthofuranylnaphthols are produced by (1) reacting 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 styreneacrylonitrile copolymers is particularly enhanced by incorporating stabilizing amounts of naphthofuranylnaphthols.
Claims22
A stabilized composition comprising 100 parts by weight of an organic material subject to the deleterious effects of oxygen, heat and light and from about 0.1 part to about 10 parts by weight of at least one naphthofuranylnaphthol having the formula ##SPC3##
- wherein each M is hydrogen, halogen, or an alkyl group containing from one to eight carbon atoms.
A naphthofuranylnaphthol having the formula ##SPC4##
- wherein at least eight M's are hydrogen but at least two of the remaining M's are alkyl groups containing from one to four carbon atoms.
1-[6,7,8,9-tetrahydro-1-naphtho(2,1-b)furanyl]-5,6,7,8-tetrahydro- 2-naphthol.
Dependencies are inferred from the claim text.