This International Standard describes a procedure for the determination of the following anti-degradants in raw synthetic rubbers:
N-alkyl-N'-phenyl-p-phenylenediamine;
N-aryl-N'-aryl-p-phenylenediamine;
N-phenyl-beta- naphtylamine;
poly-2,2,4-trimethyl-1,2-dihydroquinoline.
Extender oils, when present, may interfere.
The method, with modification if necessary, may be applied to the determination of other amine anti-degradants.
NOTE - The method has been tested successfully on CR, NBR and SBR.