Ink composition

Details Ink composition Ink composition

1998-01-08

2000-08-08

Klemanski, Helene

Compositions: coating or plastic

Coating or plastic compositions

Marking

106 3143, 106 3144, 106 3145, 106 3147, 106 315, 106 3148, 106 3151, 106 316, 106 3175, 106 3177, 106 3178, 106 318, C09D 1102

Patent

active

060996250

DESCRIPTION:

BRIEF SUMMARY
The present invention relates to compounds, compositions and solutions thereof, suitable for use in printing and imaging technologies, especially those suitable for coloration of substrates such as paper, plastics, textiles, metal and glass by printing processes such as inkjet printing and those suitable for use in electrophotography such as charge control agents (CCA), charge transfer materials (CTM), charge generating materials (CGM) and toners.
lnkjet printing is a non-impact printing technique which involves ejecting, thermally or by action of an oscillating piezo crystal, droplets of ink continuously or on demand from a fine nozzle directly onto a substrate such as paper, plastics, textile, metal or glass. The ink may be aqueous, solvent or hot melt based and must provide sharp, non-feathered images which have good waterfastness, light fastness and optical density, have fast fixation to the substrate and cause no clogging of the nozzle.
Electrophotographic copiers or printers generally comprise an organic photoconductor (OPC) and a developer or toner. The OPC generally comprises an electrically conducting support, a charge generating layer and a charge transport layer. The electrically conducting support is a metal drum, typically an aluminium drum, or a metallised polymer film, typically aluminised polyester. The charge generating layer comprises a charge generating material (CGM) and a binder resin, typically a polycarbonate. The charge transport later comprises a charge transport material (CTM) and a binder resin, typically a polycarbonate. The developer or toner comprises a toner resin, a colorant and optionally a charge control agent (CCA). The toner resin is typically a styrene or substituted styrene polymer or styrene-butadiene copolymer. The colorant is typically a dye or pigment or mixture thereof.
According to the present invention there is provided an ink composition comprising a compound of Formula (1) and salts thereof: ##STR2## wherein Ch represents an arrangement of atoms which causes the compound to absorb electromagnetic radiation; and provided that w and x are not both equal to zero and when one of w or x is 0 at least one of m and n is equal to or greater than 2.
The compound may absorb radiation in the UV, visible or infra-red region of the electromagnetic spectrum.
The chromogen represented by Ch is preferably an optionally substituted group of Formula (2): ##STR3## in which R.sup.1 and R.sup.2 each independently is --H, or optionally substituted alkyl or alkoxy; or an optionally substituted group of Formula (2B): ##STR4## and tautomers thereof in which T is A.sup.1 -NH or optionally substituted phenyl (such as optionally substituted mono- or dialkylaminophenyl), T.sup.1 is optionally substituted C.sub.1-12 -allyl or optionally substituted aryl, and T.sup.2 is optionally substituted alkyl; or an optionally substituted group of Formula (3): ##STR5## or an optionally substituted group of Formula (4): ##STR6## in which R.sup.c and R.sup.d each independently is H, alkyl, alkoxy or halogen and Ring A and Ring B may carry from 1 to 5 optional substituents; or an optionally substituted group of Formula (5): ##STR7## except for 1,4-bis(4-aminobutyl)-9,10-anthracenedione, 1,4-bis(3-aminopropyl)-9,10-anthracenedione and 1,8-bis[(2-chloroethyl)thio]anthraquinone in which or heteroaromatic amine or is selected from an optionally substituted group of Formula (6): ##STR8## in which K and L each independently is any of the optional substituents listed below or K and L together with the carbon atoms to which they are attached form a 5- or 6-membered carbocyclic or hetrocyclic ring; or ##STR9## wherein X.sup.1, Y and Z each independently is N or C-R.sup.3 in which R.sup.3 is --H, --CN alkyl, alkoxy, cycloallyl, aryl, aralkyl, aryloxy or amino; or ##STR10## wherein R.sup.4 and R.sup.5 each independently is an electron withdrawing group or R.sup.4 and R.sup.5 may be joined form a heterocyclic ring such as; ##STR11## or an optionally substituted group of Formula (9): ##STR12## wherein R.sup.4 and R.s

REFERENCES:
patent: 3889271 (1975-06-01), Freytag et al.
patent: 4105572 (1978-08-01), Gorondy
patent: 4732615 (1988-03-01), Kawashita et al.
patent: 4954410 (1990-09-01), Takuma et al.
patent: 4969951 (1990-11-01), Koike et al.
patent: 5233028 (1993-08-01), Ohtsuka et al.
patent: 5296325 (1994-03-01), Ohtsuka et al.

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