METHOD OF ELECTROSTATIC COLORATION OF HARDENED NITROGEN-CONTAINING POLYMERS AND ELECTROSTATICALLY COLORED PRODUCT Russian patent published in 1998 - IPC

FIELD: polymer materials. SUBSTANCE: polymer compounds containing or forming urea and/or urethane groups are hardened together with nonvolatile metal salt inducing conduction and colored by electrostatic technique. Another version of method consists in molding product from polymer composition based on material containing or forming urea and/or urethane groups and inducing conduction nonvolatile metal salt, coating product with conducting ground, and electrostatically coloring product. Elaborated also is electrostatically colored product having layer of hardened polymer and layer of electrostatically applied dye. EFFECT: stabilized physical and esthetic properties of colored polymers. 20 cl, 6 tbl