Compositions and use of compositions in printing processes

Patent metadata

Field	Value
Publication number	US-2016326377-A1
Application number	US-201615215411-A
Country	US
Kind code	A1
Filing date	Jul 20, 2016
Priority date	Sep 30, 2014
Publication date	Nov 10, 2016
Grant date	—

Abstract

An aqueous sacrificial coating composition for an image transfer member in an aqueous ink imaging system is provided. The sacrificial coating composition may include at least one polymer, at least one selected from (i) at least one chain extender, or (ii) a reactive elastomeric latex, wherein the at least one chain extender comprises a species capable of linking linear chains or chain segments of the reactive elastomeric latex, at least one hygroscopic plasticizer, and at least one surfactant.

First claim

What is claimed is:

1 . An aqueous sacrificial coating composition for an image transfer member in an aqueous ink imaging system, comprising:
at least one polymer, at least one selected from (i) at least one chain extender, or (ii) a reactive elastomeric latex, wherein the at least one chain extender comprises a species capable of linking linear chains or chain segments of the reactive elastomeric latex; at least one hygroscopic plasticizer; at least one surfactant.

2 . The aqueous sacrificial coating composition of claim 1 , wherein the at least one polymer comprises at least one hydrophilic polymer selected from the group consisting of starch, polyvinyl alcohol (PVOH), copolymers of PVOH, poly(vinylpyrrolidinone) (PVP), poly(ethylene oxide), hydroxyethyl cellulose, cellulose acetate, poly(ethylene glycol), poly(ethylene glycol), copolymers of poly(ethylene glycol), diblock copolymers of poly(ethylene glycol), triblock copolymers of poly(ethylene glycol), polyacrylamide (PAM), poly(N-isopropylacrylamide) (PNIPAM), poly(acrylic acid), polymethacrylate, acrylic polymers, maleic anhydride copolymers, sulfonated polyesters, and mixtures thereof.

3 . The aqueous sacrificial coating composition of claim 1 , wherein the at least one polymer comprises one or more repeating polymeric units selected from the group consisting of alkyl acrylate, styrene and butadiene, isoprene, methacrylonitrile, acrylonitrile, vinyl ethers, vinyl esters, vinyl ketones, vinylidene halide, N-vinyl indole, N-vinyl pyrrolidene, acrylic acid, methacrylic acid, acrylamide, methacrylamide, vinylpyridine, vinylpyrrolidone, vinyl-N-methylpyridinium chloride, vinyl naphthalene, p-chlorostyrene, vinyl chloride, vinyl bromide, vinyl fluoride, ethylene, propylene, butylene, isobutylene, and mixtures thereof.

4 . The aqueous sacrificial coating composition of claim 1 , wherein the at least one chain extender is selected from the group consisting of ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, propylene glycol, dipropylene glycol, tripopylene glycol, 1,3-propanediol, 1,3-butanediol, 1,4-butanediol, neopentyl glycol, 1,6-heanediol, 1,4-cyclohexanedimethanol, hydroquinone Bis(2-hydroxyethyl)ether (HQEE), ethanolamine, diethanolamine, methyldiethanolamine, phenyldiethanolamine, glycerol, trimethylolpropane, 1,2,6-hexanetriol, triethanolamine, pentaerythritol, N,N,N′,N′-tetrakis(2-hydroxypropyl)ethylenediamine, diethyltoluenediamine, dimethylthiotoluenediamine, 1,4,-Bis(2-hydroxyethoxy)benzene, or mixtures thereof.

5 . The aqueous sacrificial coating composition of claim 1 , wherein the reactive elastomeric latex comprises a water-based aliphatic polyurethane elastomer.

6 . The aqueous sacrificial coating composition of claim 1 , wherein the at least one hygroscopic plasticizer is selected from the group consisting of glycerol, sorbitol, vinyl alcohol such as ethylene vinyl alcohol, propylene glycol, hexylene glycol, butylene glycol, xylitol, maltito, polymeric polyols such as polydextrose, glyceryl triacetate, urea, alpha-hydroxy acids (AHA's), and mixtures thereof.

7 . The aqueous sacrificial coating composition of claim 1 , wherein the surfactant comprises at least one of an anionic surfactant, at least one of a non-ionic surfactant, or mixtures thereof.

8 . The aqueous sacrificial coating composition of claim 1 , further comprises a pH of about 5 to about 10.

9 . An aqueous ink composition, comprising:
a latex emulsion; and a reactive elastomeric latex capable of reacting with a chain extender; at least one colorant; and at least one solvent comprising water.

10 . The aqueous ink composition of claim 9 , wherein the latex emulsion comprises polymer particles comprising polystyrene copolymer formed by emulsion polymerization of styrene, n-butyl acrylate, methacrylic acid, beta-carboxyethylacrylate (beta-CEA) and a surfactant.

11 . The aqueous ink composition of claim 9 , wherein the latex emulsion comprises a copolymer comprised of styrene monomer and butyl acrylate monomer.

12 . The aqueous ink composition of claim 9 , wherein the reactive elastomeric latex comprises a water-based aliphatic polyurethane elastomer.

13 . The aqueous ink composition of claim 9 , wherein the reactive elastomeric latex comprises about 0.01 wt % to about 10 wt % of the aqueous ink composition.

14 . The aqueous ink composition of claim 9 , further comprising a viscosity of about 3 to about 12 cps at a temperature suitable for ejecting as droplets from an inkjet printhead.

Assignees

• Xerox Corp

Inventors

• Song Guiqin
• Breton Marcel P
• Farrugia Valerie M
• Mayo James D

Classifications

• C09D11/324

  containing carbon black · CPC title

• C09D11/106

  containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds · CPC title

• C09D11/107

  from unsaturated acids or derivatives thereof · CPC title

• C08K3/04

  Carbon · CPC title

• C09D129/04

  Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids · CPC title