New polyesters are provided, having advantageous utility as dual function binder/charge agents in electrostatographic toner particles. The new polyesters contain a quaternary phosphonium salt comprising a cationic portion and an anionic portion, wherein the cationic portion comprises a phosphonium atom directly covalently bonded to at least one aryl moiety substituted with a group containing an ester linkage to the rest of the polyester, and wherein the anionic portion of the salt comprises an arylsulfonate moiety in which the aryl group is unsubstituted or is substituted with one or more alkyl, halide, or group having an ester linkage to the rest of the polyester.
提供了新的聚酯,作为静电成像墨粉颗粒中的双重功能粘合剂/电荷剂具有优越的实用性。新的聚酯包含四元
磷盐,包括阳离子部分和阴离子部分,其中阳离子部分包括一个
磷盐原子,直接共价键结合到至少一个含有酯键的基团取代的芳基部分,而盐的阴离子部分包括一个芳基
磺酸盐基团,其中芳基部分未取代或取代有一个或多个烷基,卤素或含有酯键的基团,与聚酯的其余部分相连。