Modified indigo compounds and methods of dyeing a substrate using a modified indigo compound
AssigneeThe H.D. Lee Company, Inc.
InventorsSudhakar Puvvada, Dennis Scheer, Paul Gerard Hoertz, Amsarani Ramamoorthy, Rajeev Rajbhandari, Caroline Elizabeth Hagerman, Alexander Peter Dirk Massey, Alexander Mark Hellawell, Asadollah Fallah, Ruhksana Quyoum
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Abstract
The present disclosure provides dye compounds for use in dyeing textiles.
Claims17
A dye compound for use in dyeing a substrate, the dye compound comprising an indigo derivative, or a salt thereof, having one or more modification over the chemical structure of indigo, wherein the indigo derivative has a water solubility of greater than 0.2% w/v in the absence of a reducing agent and in the presence of oxygen, and converts to indigo upon removing the modification, and wherein the indigo derivative is of Formula (Ia) or (Ib)
- wherein X is selected from the group consisting of acetate, propionate, lactate, citrate, tartrate, succinate, fumarate, maleate, malonate, mandelate, phthalate, phosphate, nitrate, sulfate, ethanesulfonate, phosphonate, napthalenesulfonate, benzenesulfonate, toluenesulfonate, camphorsulfonate, methanesulfate, ethanesulfonate, napthalenesulfate, benzenesulfate, toluenesulfate, camphorsulfate, bisulfate, sulfite or bisulfite.
Dependencies are inferred from the claim text.