Patent ID: 6736887
Filing Date: 2004-05-18
Classification: C09D

Abstract:
A water-based ink comprising (A) an aqueous dispersion of polymer particles having an average particle diameter of 20 to 200 nm, which particles contain a colorant, and (B) at least one polyalkylene oxide derivative selected from the group consisting of the compounds represented by the following formulae:R1Oâ€”(CH2CH2O, aâ€”Hâ€ƒâ€ƒ(I) Hâ€”(OCH2CH2)bâ€”Oâ€”R2â€”Oâ€”(CH2CH2O)câ€”Hâ€ƒâ€ƒ(II) R3Oâ€”(CH2CH2O)dâ€”(CH2CH(CH3)O)eâ€”Hâ€ƒâ€ƒ(III) Hâ€”(OCH2CH2)fâ€”(OCH2CH(CH3))gâ€”Oâ€”R4â€”Oâ€”(CH2CH(CH3)O)hâ€”(CH2CH2O)iâ€”Hâ€ƒâ€ƒ(IV) wherein each of a and d is independently a number of 10 to 40; each of b and c is independently a number of 5 to 20; e is a number of 1 to 3; f is a number of 5 to 20; each of g and h is independently a number of 0 to 4, wherein g+h is a number satisfying 1 to 4; i is a number of 5 to 20; each of R1 and R3 is independently a monovalent aliphatic hydrocarbon group selected from the group consisting of ethyl, propyl, isopropyl, butyl, isobutyl, t-butyl, hexyl and isohexyl, a monovalent alicyclic group having 3 to 6 carbon atoms, or a monovalent aromatic group having 6 to 12 carbon atoms; R2 is a divalent aliphatic group having 3 to 6 carbon atoms, a divalent alicyclic group having 3 to 6 carbon atoms, or a divalent aromatic group having 6 to 12 carbon atoms; R4 is a divalent aliphatic group having 2 to 6 carbon atoms, a divalent alicyclic group having 3 to 6 carbon atoms, or a divalent aromatic group having 6 to 12 carbon atoms; and the oxyethylene chain and the oxypropylene chain described in the formulae (III) and (IV) may be added in random or block forms.