phenol c 1 c 10 alkyl substituted phenol or unsubstituted phenol with an aldehyde preferably formaldehyde in an alkaline medium or by condensation of bifunctional phenoldialcohols additional information concerning phenolic curatives may be found in u s pat no 4 311 628 the content of which is incorporated herein by reference it has been observed that the compositions of the present invention display improved oil resistance without the need to fully crosslink the rubber component thus in a preferred embodiment of the present invention the compositions are cured to a gel content of less than about 97 more preferably in the range of about 85 95 and most preferably about 90 it will be understood that gel content refers to the weight of curable rubber extractable in cyclohexane at 23 u00b0 c the compositions of the present invention may be made by conventional blending techniques which would be readily apparent to those skilled in the art a suitable blending technique includes the use of an internal mixer such as a banbury as one example the monoolefin copolymer or terpolymer and polyolefin resin may be mixed at a temperature where the mixture starts to melt then the other components may be added it may be necessary to then raise the temperature in order to promote the vulcanization reaction the mixed composition may then be discharged from the internal mixer and further refined and cooled in addition to containing the components described above the compositions of the present invention may include components conventionally used in thermoplastics such as thermoplastic polyolefins thermoplastic vulcanizates or conventional crosslinkable thermoset elastomers the compositions of.