Patent ID: 7294182
Filing Date: 2007-11-13
Classification: C09D

Abstract:
1. Composition for water-removable ink comprising: 3-5% by weight of more than one electron-donating coloring agent selected from a group consisting of 2-anilino-6-dibutylamino-3-methylfluoran, 2-dibenzylamino-6-diethylamino fluoran and 9-(diethylamino)spiro[12H-benzo[a]xanthene-1,2-isobenzofuran]-3; 6-8% by weight of gallic acid (3,4,5-oxybenzoic acid) as an electron-accepting developer; 40-45% by weight of methylethylketone as a hydrophilic solvent; 0.5-1.0% by weight of triglyceride as a lubricant; 2-4% by weight of polyoxyethylene lauryl ether as a surfactant; 0.5-1.0% by weight of a mixture of oleic acid, polyethylene glycol, stearic acid, polyoxyalkylene tristyrenated phenol and a block copolymer of polyoxyethylene-polyoxypropylene as a dispersing and level-dyeing agent; 5-7% by weight of 5% hydroxypropyl cellulose solution as a fixing agent; and the balance of more than one solvent selected from a group consisting of n-butyl alcohol, n-propyl alcohol, isopropyl alcohol and pentanol.