Non aqueous fluorescent dispersion ink with improved shelf life, tack and flow
AssigneePitney Bowes Inc.
InventorJudith D. Auslander
Life of this patent
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Abstract
Fluorescent Ink formulations have been conceived that result in inks having improved tack and flow properties so that problems relating to ink plugging with contemporary ink pads are reduced. Another advantage to the inks is that they have improved paper dust resistance, shelf life and flow properties. These inks are made of a coloring material having an organic non fluorescent pigment dispersed in a rosin ester and a solid solution of a fluorescent dye in triazine paraformaldehyde aryl sulfonamide resin dispersed in an alkyd resin. The solvent system is preferably composed of non drying solvents such as emollients and higher molecular weight glycols.
Claims22
A non aqueous fluorescent dispersion ink composition, comprising:
- a) 40 to 90% by weight of an non aqueous continuous phase of emollient solvent,
- b) 1-10% by weight non fluorescent organic pigment having a size of 0.1 to 0.5 microns dispersed in rosin ester, and
- c) 5-30% by weight organic fluorescent pigment having an average particle size of 0.1 to 0.5 microns made of solid solution of fluorescent dye in triazine toluene sulfonamide/formaldehyde resin dispersed in an alkyd resin varnish of linseed oil alkyd resin.
A non aqueous, fluorescent dispersion ink composition comprising:
- a) 40 to 90% by weight non aqueous solvent containing 95 to 99% by weight emollient, 1 to 5% nonyl phenoxy polyoxyethylene ethanol,
- b) 1 to 10% by weight non fluorescent organic pigment flushed in a non ionic surfactant and,
- c) 5.0 to 30% by weight fluorescent pigment.
A non aqueous, continuous fluorescent dispersion ink composition comprising:
- a) 40-90% by weight a non aqueous phase, and
- b) 10-30% by weight a coloring material including an organic non fluorescent pigment predispersed in a rosin ester and a solid solution of a fluorescent dye in amino formaldehyde resin dispersed in an alkyd resin.
A non aqueous, fluorescent dispersion ink composition comprising:
- a) 40 to 90% by weight of a non aqueous continuous phase selected from the group consisting of castor oil, oleic acid, and soy bean oil, polyoxypropylene stearyl ether, polyoxypropylene (10) cetyl ether, a mixture of 10 to 30% by weight polypropylene glycol and 70 to 90% by weight polyoxypropylene stearyl ether, and 10 to 30% by weight polypropylene glycol and 70 to 90% by weight polyoxypropylene (10) cetyl ether
- b) 5-30% by weight non fluorescent organic pigment having an average particle size of 0.1 to 0.5 microns dispersed in rosin ester, and
- c) 1-10% by weight organic fluorescent pigment having an average particle size of 0.1 to 0.5 microns made of solid solution of fluorescent dye in triazene toluene sulfanomide/formaldehyde resin dispersed in a linseed oil alkyd resin.
Dependencies are inferred from the claim text.