1973. KÜMMEL, P. [Protection of Rubber Articles.] Belgian Patent 450,170, May 1943. Chem. Abs., vol. 41,1947, p. 6762.

Rubber is protected against aging by means of contact paraffins, preferably rich in isoparaffins obtained in the synthesis of benzine or of paraffin by the Fischer-Tropsch process and preferably having a m. p. of 60°-66°.