Polyhydroxy charging adjuvants for liquid electrostatic developers
AssigneeE. I. Du Pont de Nemours and Company
InventorRobert D. Mitchell
Life of this patent
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Abstract
Electrostatic liquid developer having improved charging characteristics consisting essentially of (A) nonpolar liquid having a Kauri-butanol value of less than 30, present in a major amount, (B) thermoplastic resin particles having an average by area particle size of less than 10 .mu.m. (C) nonpolar liquid soluble ionic or zwitterionic compound, and (D) a polyhydroxy compound, preferably soluble in the developer in an amount of at least 2% by weight. The electrostatic liquid developers are useful in copying making proofs including digital color proofs, lithographic printing plates, and resists.
Claims15
An electrostatic liquid developer having improved charging characteristics consisting essentially of
- (A) nonpolar liquid having a Kauri-butanol value of less than 30, present in a major amount,
- (B) thermoplastic resin particles having an average by area particle size of less than 10 .mu.m,
- (C) nonpolar liquid soluble ionic or zwitterionic compound, and
- (D) a polyhydroxy compound.
Dependencies are inferred from the claim text.