Patent ID: 6680205
Filing Date: 2004-01-20
Classification: A63B,C08K,G01N

Abstract:
A solvent-activated, color-forming composition, comprising:(a) a solvent-absorbing material; (b) a color former compounded with said solvent-absorbing material, wherein said color former is a chelating agent; and (c) a source of metal ions compounded with said solvent-absorbing material or said solvent-absorbing material containing the metal ions wherein metal ions from said source of metal ions are capable of complexing with said color former as said solvent-absorbing material absorbs said solvent, resulting in a detectable color change of said solvent-absorbing material; and wherein said solvent-absorbing material is polyethylene acrylic acid ionomer containing about 5% titanium dioxide filler resin; said color former is about 0.15% to 2.0% 1,2-Dihydroxybenzene; and said source of compounded metal ions is about 0.25% to 2.0% zinc acetate.