Non-volatile conductive inks

Claim 2

A ING ESSENTIALLY OF TRIETHYLENE GLYCOL MONOBUTYL ETHER, ABOUT 5 PERCENT TO 25 PERCENT COLORING AGENT DISPERSIBLE IN SAID TREITHYLENE GLYCOL MONOBUTYL ETHER, ABOUT 1 PERCENT TO 10 PERCENT OF ALKYLATED POLYMER OF HETEROCYLIC N-VINYL MONOR DISPERSING AGENT FOR SAID COLORING AGENT AND ABOUT 5 PERCENT TO 30 PERCENT BINDER SOLUBLE IN SAID TRIETHYLENE GLYCOL MONOBUTYL ETHER, SAID BINDER BEING SELECTED FROM THE GROUP CONSISTING OF EPOXY RESINS, PHENOLIC RESINS, POLYESTERS, ROSIN ESTERS, ACRYLIC TYPE RESINS AND POLYAMIDE RESINS.

Claim 3

The ink of claim 1 wherein the coloring agent is about 10 to 20 weight percent of the composition.

Claim 4

The ink of claim 1 wherein the dispersing agent is about 4 to 10 weight percent of the composition.

Claim 5

The ink of claim 1 wherein the binder is about 10 to 20 weight percent of the composition.

Claim 6

The ink of claim 1 wherein the triethylene glycol monobutyl ether is about 25 to 90 weight percent of the composition.

Claim 7

The ink of claim 1 wherein the viscosity is less than about 1,000 centipoises at 25* C. and the resistivity is less that about 109 ohm-centimeters at 25* C.

Claim 8

The ink of claim 1 further including up to about 40 weight percent of a plasticizer.

Claim 9

A non-volatile, non-hygroscopic liquid developer for visual development of latent electrostatic images formed on a photoconductive layer, said liquid developer having a resistivity at 25*C of less than 109 ohm-centimeters and a viscosity of about 100 to 1,000 centipoises at 25*C, comprising about 10-20 weight percent of a coloring agent capable of yielding color copies when attracted to a latent image, about 4 to 10 weight percent of a dispersing agent selected from the group consisting of polyvinyl pyrrolidones and alkylated polyvinyl pyrrolidones for said coloring agent, about 10 to 20 weight percent of a resin binder selected from the group consisting of epoxy resins, phenolic resins, acrylic type resins, polyamide resins, polyesters, and rosin esters, and the balance triethylene glycol monobutyl ether.

Claim 10

A non-volatile, non-hygroscopic liquid developer for visual development of latent electrostatic images formed on a photoconductive layer, said liquid developer having a resistivity at 25*C of less than 109 ohm-centimeters and a viscosity of about 100 to 1,000 centipoises at 25*C, comprising about 10-20 weight percent of a coloring agent capable of yielding color copies when attracted to a latent image, about 4 to 10 weight percent of a dispersing agent selected from the group consisting of polyvinyl pyrrolidones and alkylated polyvinyl pyrrolidones for said coloring agent, about 10 to 20 weight percent of a resin binder selected from the group consisting of epoxy resins, phenolic resins, acrylic type resins, polyamide resins, polyesters, and rosin esters, and the balance triethylene glycol monobutyl ether.

Claim 11

The liquid developer of claim 8 further comprising up to about 40 weight percent of a plasticizer.