Synergistic antioxidant mixtures

Details Synergistic antioxidant mixtures Synergistic antioxidant mixtures

1979-11-16

1981-03-03

Hoke, V. P.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

252406, 44 70, 2603985, 26034843, 560 15, 560 17, 560152, C08K 537, C07C14920

Patent

active

042540208

ABSTRACT:
Compounds of the formula: ##STR1## wherein R is selected from (1) alkyl radicals having 6 to 20 carbon atoms; (2) phenyl radicals which may be substituted by 1 or 2 alkyl groups having 1 to 8 carbon atoms; or (3) aralkyl radicals having 7 to 12 carbon atoms; and wherein R.sup.1 is selected from (1) alkylene radicals having 2 to 6 carbon atoms; (2) cycloalkylene radicals having 5 to 12 carbon atoms; (3) alkylcycloalkylene radicals of the formula --R.sub.3 --R.sub.2 (R.sub.4).sub.n, wherein R.sub.2 is a cycloalkylene radical having 5 to 12 carbon and R.sub.3 and R.sub.4 are alkylene radicals having 1 to 6 carbon atoms, and n equals 1 or 0; (4) or a group of the formula --R.sub.5 --YR.sub.6, wherein R.sub.5 and R.sub.6 are alkylene radicals having 2 to 6 carbon atoms and Y is oxygen, sulfur, or a 1,4-phenylene radical. These compounds have utility as synergistic stabilizers with phenolic type antioxidants in the stabilization of organic materials such as natural and synthetic polymers, rubbers, lubricants and oils, etc.

REFERENCES:
patent: 2731437 (1956-01-01), Bender et al.
patent: 3492336 (1970-01-01), Giolito
patent: 3629194 (1971-12-01), Onishi et al.
patent: 3743679 (1973-07-01), Hickner et al.
patent: 3758549 (1973-09-01), Dexter et al.
patent: 4125515 (1978-11-01), Kuczkowski
CA, 72, 6744(a) 1970.

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