The EPDM blends were prepared by one-step mixing of the polymers EPDM 1 and EPDM 2, fillers (Carbon
black N550 with white filler) and all vulcanization ingredients at 90 – 95 °C in mixing chamber (volume 2 l) of
industrial mixer in company Hexpol Compounding. The composition of the EPDM blends is given in Table 1.
EPDM blend filled with N550/ Sillitin N 85 was used as reference blend.