US 5,852,074 A · Aqueous ink for inkjet printing

Abstract

An aqueous inkjet printing ink with excellent water resistance, wherein scorching onto a printer head scarcely occurs, the amount of a hydrophobic dye contained in an aqueous dispersion of a vinyl polymer can be increased, and sharp printed letters having deep color can be provided. The aqueous ink product for inkjet printing comprises a dispersion of a vinyl polymer obtained by copolymerizing one or more selected from a silicone macromer, an acrylamide monomer and a methacrylamide monomer (not having a salt-forming group), or a styrene macromer of a styrene homopolymer or a styrene copolymer having a polymerizable functional group at one terminal end, a polymerizable unsaturated monomer having the salt-forming group, and a monomer capable of polymerizing with these monomers in the presence of a radical polymerization initiator, a hydrophobic dye being contained in the dispersion.

Claims11

Dependent claims

An aqueous inkjet printing ink, comprising an aqueous dispersion (A) of particles of a vinyl polymer formed by copolymerizing:

at least one monomer (a) selected from the group consisting of:
a silicone macromer (a-1) having the formula (1),
X(Y).sub.n Si(R).sub.3-m (Z).sub.m ( 1)
wherein X is a polymerizable unsaturated group;
Y is a divalent bond group;
R is a hydrogen atom, a lower alkyl group, an aryl group or an alkoxy group, and a plurality of R's may be the same as or different from one another;
Z is a monovalent group of a siloxane polymer having a number-average molecular weight of at least about 500;
n is 0 or 1;
and m is an integer of 1 to 3;
an acrylamide monomer (a-2), and
a methacrylamide monomer (a-3) not having a salt-forming group,
a polymerizable unsaturated monomer (c) having a salt-forming group, and
a monomer (d) capable of polymerizing with these monomers in the presence of a radical polymerization initiator (e),
wherein a hydrophobic dye (B) is contained in the particles of the aqueous dispersion (A).

11 more elements

Dependencies are inferred from the claim text.

Aqueous ink for inkjet printing

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Aqueous ink for inkjet printing

Life of this patent

Abstract

Claims11