Liquid developer compositions with block copolymers
AssigneeXerox Corporation
InventorsJames R. Larson, John W. Spiewak
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Abstract
A liquid developer comprised of a liquid, thermoplastic resin particles, a nonpolar liquid soluble charge director, comprised of a quaternary ammonium block copolymer with hydroxide as the anion.
Claims26
A liquid developer comprised of a liquid, thermoplastic resin particles, a nonpolar liquid soluble charge director, comprised of a quaternary ammonium block copolymer with hydroxide as the anion.
A liquid developer comprised of a nonpolar liquid, thermoplastic resin particles, a charge adjuvant, and a nonpolar liquid soluble ionic charge director comprised of a quaternary ammonium block copolymer with hydroxide as the anion.
A liquid electrostatographic developer comprised of (A) a nonpolar liquid having a Kauri-butanol value of from about 5 to about 30 and present in a major amount of from about 50 percent to about 95 weight percent;
- (B) thermoplastic resin particles having an average volume particle diameter of from about 5 to about 30 microns;
- (C) a nonpolar liquid soluble ionic charge director compound comprised of a quaternary ammonium block copolymer with hydroxide as the anion;
- and (D) a charge adjuvant.
A liquid developer consisting essentially of a nonpolar liquid, thermoplastic resin particles, a charge adjuvant, and a nonpolar liquid soluble ionic charge director comprised of a quaternary ammonium block copolymer with hydroxide as the anion;
- and wherein said quaternary ammonium block copolymer is of the formula ##STR4## wherein R is alkyl or hydrogen;
- R' is alkyl;
- and R" is alkyl with from 6 to about 20 carbon atoms;
- and wherein y and x represent the number average degree of polymerization, and wherein the ratio of x to y is in the range of from about 10 to 2 to about 100 to 20.
Dependencies are inferred from the claim text.