Mercapto acid ester antioxidants for polymers

Details Mercapto acid ester antioxidants for polymers Mercapto acid ester antioxidants for polymers

1982-04-05

1983-01-25

Hoke, V. P.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524285, 524291, 524302, 524343, 524344, 252404, C08K 537

Patent

active

043704344

ABSTRACT:
Compounds of the formula: ##STR1## wherein R, R' and R.sup.2 are alkyl radicals having 1 to 20 carbon atoms, phenyl radicals which may be substituted by 1 or 2 alkyl groups having 1 to 8 carbon atoms, aralkyl radicals having 7 to 12 carbon atoms, or cycloalkyl radicals having 5 to 12 carbon atoms; and wherein R.sup.3 is hydrogen or an alkyl radical having from 1 to 4 carbon atoms. These compounds have utility as synergistic stabilizers with phenolic type antioxidants for the stabilization of organic materials such as natural and synthetic polymers, rubbers, lubricants and oils, etc.

REFERENCES:
patent: 2468725 (1949-05-01), Gresham
patent: 3637809 (1972-01-01), Kleiner
patent: 3789064 (1974-01-01), Hechenbleikner
patent: 3954839 (1976-05-01), Dexter
patent: 4080364 (1978-03-01), Kauder
patent: 4226991 (1980-10-01), Nakahara
patent: 4301296 (1981-11-01), Kuczkowski
Reid, "Organic Chemistry of Bivalent Sulfur", vol. III, pp. 185, 186, 187, 193, 194 and 227-249 (1960).
Kuliev, Chem. Abstract 79 115348t (1973).
Allinger, "Organic Chemistry", pp. 528-530 (1971).

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