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US 5,565,599 AGranted
Stabilised dithiophosphoric acid polysulphides
AssigneeRhein Chemie Rheinau GmbH
InventorsHans-Joachim Graf, Lothar Steger, Klaus Kn orr, Hartmut Schulz, Volker Sch afer, Thomas Scholl, R udiger Schubart, Manfred Schweiger
Life of this patent
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Abstract
Disclosed herein are stabilized dithiophosphoric acid polysulphides of the formula (I) ##STR1## in which R is a C.sub.1 -C.sub.20 alkyl, cycloalkyl, aryl or aralkyl residue and x is an integer from 2 to 15, containing as stabilizer 1 to 20 wt.% of a carboxylic acid of the general formula R'COOH, in which R' is a C.sub.1 -C.sub.20 alkyl residue, a cycloalkyl residue, an aryl residue or an aralkyl residue, and 1 to 20 wt.% of calcium oxide or zinc oxide.
Claims1
A stabilized composition containing:
- dithiophosphoric acid polysulphides of the formula (I) ##STR3## in which R is a C.sub.1 -C.sub.20 alkyl, cycloalkyl, aryl or aralkyl residue and
- x is an integer from 2 to 15,
- and containing as stabilizer 1 to 20 wt% of a carboxylic acid of the general formula R'COOH, in which R' is a C.sub.1 -C.sub.20 alkyl residue, a cycloalkyl residue, an aryl residue or an aralkyl residue, and
- 1to 20 wt% of calcium oxide or zinc oxide.
1 more element
Dependencies are inferred from the claim text.