Color salts of basic dyes with acidic optical brighteners of stilbene type
AssigneeShowa Kagaku Kogyo Company, Ltd.
InventorsKazuaki Suzuki, Shohei Kuwabara
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Abstract
This invention relates to a novel color salt or color complex consisting of an optical brightener component having at least one anionic group and a color component having at least one basic group capable of forming a salt with the anionic group. This color salt is capable of coloring various fibrous articles, paper, pulp, leathers, rubbers, adhesives and plastics in clear and brightened color.
Claims6
A color salt consisting of a stilbene type optical brightener component having at least one anionic group and a color component having at least one basic group capable of forming a salt with the anionic group.
A process for the production of a color salt, which comprises mixing a solution of an optical brightener having at least one anionic group in water or water and a water-soluble organic solvent and a solution of a coloring agent having at least one basic group capable of forming a salt with the anionic group of the optical brightener in water or water and a water-soluble organic solvent.
Dependencies are inferred from the claim text.