Composition of matter and method for electrostatic image development

摘要

Composition of matter for electrostatic image development and a method for developing therewith an electrostatic charge pattern of positive charge, wherein the composition consists of powder particles containing at least 80% by weight of a mixture of at least 30% by weight of: a polyester derived from fumaric acid or a mixture of fumaric acid and isophthalic acid wherein the fumaric acid represents at least 95 mole % of the acids and a polyol blend of propoxylated bisphenol characterized by the formula: +TR wherein m and n are integers with the proviso that the average sum of m and n is from 2 to 7, and either or both of a copolymer of ethylene, maleic acid and/or maleic anhydride wherein from 50 to 70 mol % of ethylene repeating units are present, and a wax of the group consisting of castor wax and montan wax.