Organometallic compounds as mottle prevention additives in liquid electrostatic developers
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United States of America Patent
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Feb 19, 1991
Grant Date -
N/A
app pub date -
Dec 20, 1989
filing date -
Dec 20, 1989
priority date (Note) -
Expired
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Abstract
Electrostatic liquid developer consisting essentially of (A) nonpolar liquid, Kauri-butanol value less than 30, (B) particles of thermoplastic resin having free carboxyl groups (<30.mu.m ave particle size), (C) nonpolar liquid soluble oil-soluble petroleum sulfonate or anionic glyceride charge director, and (D) at least one organometallic compound as defined present in 0.01 to 0.15 part by weight metal based on the total weight of liquid developer. The process of preparation of the liquid developer is also disclosed. The developers demonstrate reduced mottle in a fused image. The developers are used in copying, color proofing, preparation of lithographic printing plates and resists.
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