Polymer mixtures based on polypropylene (PP) and acrylonitrile rubber (NBR) were prepared in a Haake Rheocord Mixer model 9000, coupled with a mixer chamber (cam rotors), in a proportion of 60:40/PP:NBR These mixtures were processed in the presence either of phenolic resin SP-1045 or a phenolic derivative synthesized with cashew nut shell liquid (CNSL) distillate, in different concentrations. The influence of this component, as well as its concentration were evaluated by some processing data and through mechanical tests.