domains it should be emphasized that although fig3 depicts a single polymer chain at the interface this is done for simplicity of illustration and does not preclude the formation of an interface comprised primarily of many layers of the random copolymer interspaced between the primary polymer and the wax release agent additionally for illustration simplicity various segments of a polymer chain are shown facing each domain it is equally likely that an interface region could be formed consisting of many polymer chains each with only a small portion of the polymer segment contacting any phase of the other toner components in such a construct the various segments of the random copolymer chains would be oriented relative to each other to provide a gradient between the toner composition primary resin and the internal release agent domain the random copolymer used as a compatibilizer is selected so that it has segments comprised of at least two different monomer species one type of segment repeating structural unit in the random copolymer being compatible with the primary resin from which a given toner composition is made while the other type of segment repeating structural unit present is compatible with the wax release agent incorporated into the toner composition the size of the individual segments lying within a polymer chain is not critical so long as the chain is sufficiently long enough to permit the statistical formation of segments of suitable length to interact with the various domains formed when the random polymer the toner composition primary resin and the internal release agent are blended additionally it should be emphasized that the nature of the random copolymer is such that it will concentrate within the interface region between.