Process for preparing electrostatically charged particles and electrostatically charged particles and powder paint

摘要

PCT No. PCT/GB95/01372 Sec. 371 Date Mar. 21, 1997 Sec. 102(e) Date Mar. 21, 1997 PCT Filed Jun. 13, 1995 PCT Pub. No. WO96/01285 PCT Pub. Date Jan. 18, 1996A process for the preparation of electrostatically charged particles of a high resistivity material which process comprises incorporating a unipolar charge into the material at a temperature at or above the glass transition temperature thereof or above the melting point thereof, the said unipolar charge being incorporated into the bulk of the material and the charged material being subsequently comminuted, or the said charge being incorporated into the material while forming particles thereof.