Erasable ink composition containing a polymer-encapsulated colorant obtained by polymerizing monomer in the presence of solid colorant particles
AssigneeBIC Corporation
InventorsDavid C. Villiger, Aiying Wang, Jeffery H. Banning, Wayne A. Chandler, Barry W. Chadwick
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Abstract
An erasable ink composition contains a dispersion of solid particles of water-insoluble polymer-encapsulated colorant obtained from the emulsion polymerization of at least one emulsion-polymerizable monomer in the presence of solid colorant particles. The ink is intended for use in any of a variety of marking instruments, in particular, a ball-point pen.
Claims18
An erasable ink composition which, prior to being applied to a substrate, comprises an aqueous dispersion of particles of water-insoluble polymer-encapsulated colorant obtained by polymerizing under emulsion polymerization conditions at least one emulsion-polymerizable monomer in the presence of solid colorant particles, the erasable ink composition when applied to a substrate and upon driving thereon exhibiting less than about 30 weight percent flaking based on the weight of the dried ink and an erasability value delta E*ab of less than about 4.0.
Dependencies are inferred from the claim text.