Liquid electrographic developers containing polymeric quaternary salts
AssigneeEastman Kodak Company
InventorsStewart H. Merrill, Alec N. Mutz, Frederick A. Stahly
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Abstract
A negatively charged liquid electrographic developer comprising an electrically insulating carrier liquid such as a paraffinic hydrocarbon fraction, having stably dispersed therein (a) a halogenated polymer, such as chlorinated polyethylene, and having dissolved therein (b) a copolymer of a quaternary ammonium salt monomer and a solubilizing monomer and (c) a copolymer of a polar monomer and a solubilizing monomer.
Claims11
A negatively charged electrographic developer comprising an electrically insulating carrier liquid having stably dispersed therein (1) a halogenated polymer, and having dissolved therein (2) a copolymer of a quaternary ammonium salt monomer and a solubilizing monomer, said copolymer being free of cations of alkali metals and alkaline earth metals, and (3) a copolymer of a polar monomer and a solubilizing monomer, the amounts of solubilizing monomer units in each copolymer being sufficient to make the copolymer soluble in the carrier liquid.
An electrographic developer comprising an electrically insulating carrier liquid having dispersed therein (1) an addition polymer of an acrylic polar monomer and at least one solubilizing monomer, said polar momomer being selected from the group consisting of:
- sulfoalkyl acrylates, sulfoalkyl methacrylates, metal salts of sulfoalkyl acrylates, metal salts of sulfoalkyl methacrylates, amine salts of sulfoalkyl acrylates, amine salts of sulfoalkyl methacrylate, metal salts of acrylic and methacrylic acids, amine salts of acrylic and methacrylic acids, and mixtures thereof;
- (2) a copolymer of a quaternary ammonium salt monomer and a solubilizing monomer, said copolymer being free of cations of alkali metals and alkaline earth metals, said quaternary ammonium salt monomer being selected from the group consisting of:
- ##STR5## wherein:
- R.sup.1, R.sup.2 and R.sup.3 are alkyl or aryl radicals of 1 to 30 carbon atoms;
- R.sup.4 and R.sup.5 are hydrogen or lower alkyl of 1 to 4 carbon atoms;
- Q represents the atoms necessary to complete a 5 or 6-membered heterocyclic ring;
- X.sup.- is an anion;
- and
- Z is selected from the group consisting of ##STR6## where R.sup.6 is alkylene, arylene or arylenealkylene of 1 to 20 carbon atoms, and n is 0 or 1.
An electrographic developer comprising an electrically insulating paraffinic carrier liquid having dispersed therein poly(vinyltoluene-co-lauryl methylacrylate-co-lithium methacrylate-co-methacrylic acid), poly(vinyltoluene-co-lauryl methacrylate-co-methacryloyloxyethyltrimethylammonium p-toluenesulfonate), and chlorinated polyethylene.
An electrographic developer composition comprising an electrically paraffinic insulating carrier liquid having dispersed therein poly(vinyltoluene-co-lauryl methacrylate-co-lithium methacrylate-co-methacrylic acid), poly(vinyltoluene-co-lauryl-methacrylate-co-dimethyloctadecylvinylbenzylam monium chloride) and chlorinated polyethylene.
Dependencies are inferred from the claim text.