Patent ID: 6613136
Filing Date: 2003-09-02
Classification: C09D

Abstract:
A recording ink composition comprising:a colorant insoluble and dispersible in water, water, a water-soluble organic solvent, a wetting agent, 2-ethyl-1,3-hexanediol, and a surfactant selected from the group consisting of surfactants of formulas (I) to (V): R1â€”Oâ€”(CH2CH2O)mCH2COOâˆ’M+â€ƒâ€ƒ(I) wherein R1 is a straight-chain or branched alkyl group having 6 to 14 carbon atoms, M+ is a cation selected from the group consisting of alkali metal cation, quaternary ammonium cation, quaternary phosphonium cation, and alkanol amine cation, and m is an integer of 3 to 12, wherein R2 is a branched alkyl group having 5 to 16 carbon atoms, and Mâˆ’ is a cation selected from the group consisting of alkali metal cation, quaternary ammonium cation, quaternary phosphonium cation, and alkanol amine cation, wherein R is a straight or branched carbon chain having 6 to 14 carbon atoms, and k is an integer of 5 to 20,Râ€”(OCH2CH2)nOHâ€ƒâ€ƒ(IV) wherein R is a straight or branched carbon chain having 6 to 14 carbon atoms, and k is an integer of 5 to 20, and wherein Râ€² is a carbon chain having 6 to 14 carbon atoms, and p and q are each an integer of 20 or less.