Patent ID: 6031023
Filing Date: 2000-02-29
Classification: C09D

Abstract:
A dry erase ink composition for use on a white board surface comprising at least one poly(oxyalkylene) substituted colorant, wherein said colorant is present in liquid or waxy form;at least one volatile solvent vehicle;at least one binder resin, which is compatible with both the colorant and the volatile solvent vehicle, and which binds to the white board surface as a friable discontinuous film upon evaporation of the volatile solvent vehicle, selected from the group consisting of polyvinylpyrrolidones, polyvinylpyrrolidone vinyl acetates, polyacrylates, polyvinyl acetates, a product of polyvinyl acetal with acetaldehyde, butyraldehyde, or both, and any mixtures thereof; and,as optional additives, one or more release agents, one or more surfactants, and one or more stabilizers;wherein said binder resin is present in an amount of from about 8 to about 20% by weight of the total ink composition.