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US 10,139,746 B2Granted
Liquid electrophotographic varnish composition
AssigneeHP Indigo B.V.
InventorsTony Azzam, Ilanit Mor, Albert Teishev, Guy Nesher, Getahun Biadglin, Haim Cohen, Samer Farran, Nurit Carmel-Barnea, Julia Kornilov
Life of this patent
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Abstract
Herein is disclosed a liquid electrophotographic varnish composition comprising: a polymer resin; an epoxy-based cross-linking agent; a metal catalyst and/or a photo-initiator for catalyzing the cross-linking; and a carrier liquid.
Claims19
A liquid electrophotographic varnish composition comprising:
- a carrier liquid;
- a polymer resin suspended as particles in the carrier liquid;
- an epoxy-based cross-linking agent dispersed or dissolved directly in the carrier liquid;
- and
- a metal catalyst and/or a photo-initiator for catalysing cross-linking of the polymer resin;
- wherein the liquid electrophotographic varnish composition is substantially colorless.
3 more elements
A liquid electrophotographic varnish composition, comprising:
- a polymer resin;
- an epoxy-based cross-linking agent;
- a metal catalyst and/or a photo-initiator for catalysing cross-linking of the polymer resin;
- and
- a carrier liquid;
- wherein the epoxy-based cross-linking agent is of formula (I):
- (X)—(Y—[Z—F]m)n formula (I)
- wherein, in each (Y—[Z—F]m)n, Y, Z and F are each independently selected, such that:
- F is an epoxide of the formula CH(O)CR1H, wherein R1 is selected from H and alkyl;
- Z is alkylene;
- Y is selected from (i) a single bond, —O—, —C(═O)—O—, or —O—C(═O)— and m is 1 or (ii) Y is NH2-m and m is 1 or 2;
- n is at least 1;
- and X is an organic group.
10 more elements
A liquid electrophotographic varnish composition, comprising:
- a polymer resin;
- an epoxy-based cross-linking agent;
- a metal catalyst and/or a photo-initiator for catalysing cross-linking of the polymer resin;
- and
- a carrier liquid;
- wherein the epoxy-based cross-linking agent is selected from the group consisting of 1,2,7,8-diepoxy octane, trimethylolpropane triglycidyl ether, resorcinol diglycidyl ether, N,N-diglycidyl-4-glycidyloxyaniline, 4,4′-Methylenebis(N,N-diglycidylaniline), tris(4-hydroxyphenyl)methane triglycidyl ether, diglycidyl 1,2-cyclohexanedicarboxylate, 1,4-cyclohexanedimethanol diglycidyl ether, tris(2,3-epoxypropyl) isocyanurate, neopentyl glycol diglycidyl ether, bisphenol A diglycidyl ether, bisphenol A propoxylate diglycidyl ether, 3,4-epoxycyclohexylmethyl 3,4-epoxycyclohexanecarboxylate, poly[(o-cresyl glycidyl ether)-co-formaldehyde], poly(ethylene-co-glycidyl methacrylate), poly(ethylene-co-methyl acrylate-co-glycidyl methacrylate), poly(bisphenol A-co-epichlorohydrin) glycidyl end-capped, poly(ethylene glycol) diglycidyl ether, and poly(propylene glycol) diglycidyl ether.
3 more elements
A method of manufacturing a liquid electrophotographic varnish composition, comprising:
- mixing a carrier liquid and a polymer resin to form varnish solids;
- mixing the varnish solids with additional carrier liquid and a charge director to form a working dispersion;
- dispersing or dissolving an epoxy-based cross-linking agent in the working dispersion;
- and
- dispersing, in the working dispersion, a metal catalyst and/or a photo-initiator for catalysing cross-linking of the polymer resin, to form the liquid electrophotographic composition, wherein the liquid electrophotographic varnish composition is substantially colorless.
2 more elements
Dependencies are inferred from the claim text.