| 摘要 |
Disclosed are dry and liquid developers suitable for the development of electrostatic latent images. The developers contain a colorant selected from the group consisting of: (a) those of Formula I <IMAGE> I wherein R1 is an electron withdrawing group, R2 is selected from the group consisting of hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, arylalkyl, and substituted arylalkyl, R3 is selected from the group consisting of hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, arylalkyl, and substituted arylalkyl, and Ar is selected from the group consisting of aryl, substituted aryl, arylalkyl, and substituted arylalkyl; (b) those of Formula II <IMAGE> II wherein R1 is selected from the group consisting of hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, arylalkyl, and substituted arylalkyl, R2 is selected from the group consisting of hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, arylalkyl, and substituted arylalkyl, and Ar is selected from the group consisting of aryl, substituted aryl, arylalkyl, and substituted arylalkyl; (c) dimeric compounds containing two moieties of Formula I; (d) dimeric compounds containing two moieties of Formula II; (e) dimeric compounds containing one moiety of Formula I and one moiety of Formula II; (f) trimeric compounds containing three moieties of Formula I; (g) trimeric compounds containing three moieties of Formula II; (h) trimeric compounds containing two moieties of Formula I and one moiety of Formula II; (i) trimeric compounds containing one moiety of Formula I and two moieties of Formula II; (j) polymeric compounds containing at least four moieties selected from the group consisting of Formula I, Formula II, and mixtures thereof; and (k) mixtures thereof.
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