| 摘要 |
A humidity tolerant charge director composition comprises a fine dispersion in a non-polar solvent of a charge direction material comprising a molecular charge director compound and an ionic charge director compound, each being conjugated to a polymer which is insoluble in non-polar organic solvents. The charge director material is prepared by adding to a solution of a molecular charge director compound and an ionic charge director compound in a non-polar organic solvent, a monomer compound capable of polymerizing to form a polymer which is insoluble in said solvent, initiating a polyerization reaction of the monomer compound and allowing the polmerization reaction to progress to completion.
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