Benzofuranylphenol stabilizers

Details Benzofuranylphenol stabilizers Benzofuranylphenol stabilizers

1977-04-29

1979-01-09

Marquis, Melvyn I.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 457PH, 26034622, 260800, 260810, 260845, 260846, 528245, C08G 806, C08G 822, C08K 513, C08K 515

Patent

active

041337999

ABSTRACT:
Benzofuranylphenols 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-acrylonitrile copolymers is particularly enhanced by incorporating stabilizing amounts of some benzofuranylphenols.

REFERENCES:
patent: 2445737 (1948-07-01), Albert
patent: 2515909 (1950-07-01), Stevens et al.
patent: 3940364 (1975-02-01), Layer
Coxworth, Canadian Journal of Chemistry, vol. 45, 1967, pp. 1777-1784.

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