JP2017155246A5

JP2017155246A5 -

Info

Publication number: JP2017155246A5
Application number: JP2017098469A
Authority: JP
Filing date: 2017-05-17
Publication date: 2019-02-14
Anticipated expiration: 2036-03-03

Description

すなわち本発明は、少なくとも水、顔料、有機溶剤、顔料分散樹脂、及び、バインダー樹脂を含有するインクジェットインキであって、
前記顔料の含有量が、インキの全重量に対して２〜７重量％であり、
前記顔料と、前記顔料分散樹脂との含有量の比が、３／１〜１００／１であり、
前記有機溶剤が、少なくとも表面張力が２０〜３０ｍＮ／ｍである有機溶剤、並びに、エチレングリコール、１，２−プロパンジオール、１，３−プロパンジオール、２−メチル−１，３−プロパンジオール、１，２−ブタンジオール、１，３−ブタンジオール、ジエチレングリコールモノメチルエーテル、ジエチレングリコールモノエチルエーテル、及び、γ−ブチロラクトンからなる群から選ばれる少なくとも１種を含み、
前記バインダー樹脂が、水溶性樹脂であり、
前記バインダー樹脂の重量平均分子量（Ｍｗ）が、５０００〜２９０００であり、
前記バインダー樹脂の数平均分子量（Ｍｎ）に対する重量平均分子量（Ｍｗ）の比（Ｍｗ／Ｍｎ）で表される分子量分布が１．０〜２．５であり、
前記バインダー樹脂の含有量が、インキの全重量に対して３〜１５重量％であることを特徴とするインクジェットインキに関する。 That is, the present invention is an inkjet ink containing at least water, a pigment, an organic solvent, a pigment dispersion resin, and a binder resin,
The content of the pigment is 2 to 7% by weight with respect to the total weight of the ink,
The ratio of the content of the pigment and the pigment dispersion resin is 3/1 to 100/1,
The organic solvent is an organic solvent having a surface tension of at least 20 to 30 mN / m , ethylene glycol, 1,2-propanediol, 1,3-propanediol, 2-methyl-1,3-propanediol, 1 , 2-butanediol, 1,3-butanediol, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, and at least one selected from the group consisting of γ-butyrolactone,
The binder resin is a water-soluble resin;
The binder resin has a weight average molecular weight (Mw) of 5000 to 29000,
Ri molecular weight distribution from 1.0 to 2.5 der represented by the ratio of the number-average molecular weight The weight average molecular weight to the (Mn) (Mw) (Mw / Mn) of the binder resin,
The content of the binder resin is 3 to 15% by weight with respect to the total weight of the ink.

Claims

An ink-jet ink containing at least water, a pigment, an organic solvent, a pigment dispersion resin, and a binder resin,
The content of the pigment is 2 to 7% by weight with respect to the total weight of the ink,
The ratio of the content of the pigment and the pigment dispersion resin is 3/1 to 100/1,
The organic solvent is an organic solvent having a surface tension of at least 20 to 30 mN / m , ethylene glycol, 1,2-propanediol, 1,3-propanediol, 2-methyl-1,3-propanediol, 1 , 2-butanediol, 1,3-butanediol, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, and at least one selected from the group consisting of γ-butyrolactone,
The binder resin is a water-soluble resin;
The binder resin has a weight average molecular weight (Mw) of 5000 to 29000,
Ri molecular weight distribution from 1.0 to 2.5 der represented by the ratio of the number-average molecular weight The weight average molecular weight to the (Mn) (Mw) (Mw / Mn) of the binder resin,
An ink-jet ink wherein the content of the binder resin is 3 to 15% by weight based on the total weight of the ink.

The inkjet ink according to claim 1, wherein the organic solvent contains 0 to 15 wt% of an organic solvent having a boiling point of 230 to 400C with respect to the total amount of the inkjet ink.

3. The inkjet ink according to claim 1, wherein the organic solvent contains 0 to 5 wt% of an organic solvent having a boiling point of 270 to 400 ° C. with respect to the total amount of the inkjet ink.

The inkjet ink according to claim 1, wherein the binder resin contains at least a styrene (meth) acrylic copolymer.

The inkjet ink according to any one of claims 1 to 4, wherein a glass transition temperature (Tg) of the binder resin is 30 to 110 ° C.

The ink-jet ink according to any one of claims 1 to 5 , wherein an acid value of the binder resin is 5 to 60 mgKOH / g.

The inkjet ink according to any one of claims 1 to 6 , wherein the binder resin has at least an alkyl chain having 8 to 30 carbon atoms.

The inkjet ink according to any one of claims 1 to 7 , wherein the content of the organic solvent having a surface tension of 20 to 30 mN / m is 0.5 to 10 wt% with respect to the total amount of the inkjet ink. .