JP2008174712A5

JP2008174712A5 -

Info

Publication number: JP2008174712A5
Application number: JP2007210976A
Authority: JP
Filing date: 2007-08-13
Publication date: 2011-03-24

Description

（１）金属顔料を含む顔料分散液であって、前記金属顔料が、平板状粒子であり、該平板状粒子の平面上の長径をＸ、短径をＹ、厚みをＺとした場合、該平板状粒子のＸ−Ｙ平面の面積より求めた円相当径の５０％平均粒子径Ｒ５０が０．５〜３μｍであり、かつ、Ｒ５０／Ｚ＞５の条件を満たし、下記の式で求められる前記金属顔料の粒度分布ＣＶ値が６０以下である、顔料分散液。
［式１］
ＣＶ値＝粒度分布の標準偏差／粒子径の平均値×１００ (1) A pigment dispersion containing a metal pigment, wherein the metal pigment is a tabular particle, and when the major axis on the plane of the tabular grain is X, the minor axis is Y, and the thickness is Z, 50% average particle diameter R50 of the equivalent circle diameter determined from the area of the X-Y plane of the tabular grains is 0.5 to 3 [mu] m, and meets the R50 / Z> 5 conditions, obtained by the following formula A pigment dispersion having a particle size distribution CV value of 60 or less.
[Formula 1]
CV value = standard deviation of particle size distribution / average value of particle size × 100

（２）前記平板状粒子のＸ−Ｙ平面の面積より求めた円相当径の最大粒子径Ｒｍａｘが１０μｍ以下である、（１）に記載の顔料分散液；
（３）（１）又は（２）に記載の顔料分散液と、有機溶剤と、樹脂と、を含有する、インク組成物；
（４）前記有機溶剤が、常温常圧下で液体であるアルキレングリコールエーテルを１種類以上含む、（３）に記載のインク組成物；
（５）前記有機溶剤が、アルキレングリコールジエーテル、アルキレングリコールモノエーテル及びラクトンの混合物である、（３）に記載のインク組成物；
（６）前記樹脂が、ポリビニルブチラール、セルロースアセテートブチレート、ポリアクリルポリオールからなる群から選択された少なくとも１種以上である、（３）〜（５）のいずれか１項に記載のインク組成物；
（７）（３）〜（６）のいずれか１項に記載のインク組成物の液滴を吐出し、該液滴を記録媒体に付着させて記録を行うインクジェット記録方法；
（８）前記記録媒体上に吐出されるインク組成物の吐出量が、０．１〜１００ｍｇ／ｃｍ²である、（７）に記載のインクジェット記録方法；
（９）前記記録媒体上で画像を形成する前記金属顔料の乾燥重量が、０．０００１〜３．０ｍｇ／ｃｍ²である、（７）又は（８）に記載のインクジェット記録方法；
（１０）前記記録媒体を加熱して印刷する、（７）〜（９）のいずれか１項に記載のインクジェット記録方法；
（１１）前記加熱温度が３０℃〜８０℃である（１０）に記載のインクジェット記録方法；
（１２）（７）〜（１１）のいずれか１項に記載のインクジェット記録方法により記録された、記録物。 (2) The pigment dispersion according to (1), wherein the maximum particle diameter Rmax of the equivalent circle diameter determined from the area of the XY plane of the tabular grains is 10 μm or less;
( 3 ) An ink composition comprising the pigment dispersion according to (1) or (2) , an organic solvent, and a resin;
( 4 ) The ink composition according to (3) , wherein the organic solvent contains one or more alkylene glycol ethers that are liquid at normal temperature and pressure.
( 5 ) The ink composition according to (3) , wherein the organic solvent is a mixture of alkylene glycol diether, alkylene glycol monoether and lactone;
( 6 ) The ink composition according to any one of (3) to (5) , wherein the resin is at least one selected from the group consisting of polyvinyl butyral, cellulose acetate butyrate, and polyacryl polyol. ;
( 7 ) An ink jet recording method in which recording is performed by ejecting droplets of the ink composition according to any one of (3) to (6) and attaching the droplets to a recording medium;
( 8 ) The inkjet recording method according to (7) , wherein the ejection amount of the ink composition ejected onto the recording medium is 0.1 to 100 mg / cm ² ;
( 9 ) The inkjet recording method according to (7) or (8) , wherein the dry weight of the metal pigment that forms an image on the recording medium is 0.0001 to 3.0 mg / cm ² ;
( 10 ) The inkjet recording method according to any one of (7) to (9) , in which the recording medium is heated and printed.
(11) The inkjet recording method according to the heating temperature is 30 ° C. to 80 ° C. (10);
( 12 ) A recorded matter recorded by the inkjet recording method according to any one of (7) to (11) .

Claims

A pigment dispersion containing a metal pigment,
The metal pigment is a tabular grain, and when the major axis on the plane of the tabular grain is X, the minor axis is Y, and the thickness is Z, a circle obtained from the area of the XY plane of the tabular grain a 50% average particle diameter R50 is 0.5~3μm equivalent diameter, and meets the R50 / Z> 5 conditions,
A pigment dispersion having a particle size distribution CV value of 60 or less of the metal pigment obtained by the following formula.
[Formula 1]
CV value = standard deviation of particle size distribution / average value of particle size × 100

2. The pigment dispersion according to claim 1, wherein the maximum particle diameter Rmax of the equivalent circle diameter determined from the area of the XY plane of the tabular grains is 10 μm or less.

An ink composition comprising the pigment dispersion according to claim 1 , an organic solvent, and a resin.

The ink composition according to claim 3 , wherein the organic solvent contains one or more alkylene glycol ethers that are liquid at normal temperature and pressure.

The ink composition according to claim 3 , wherein the organic solvent is a mixture of alkylene glycol diether, alkylene glycol monoether and lactone.

The ink composition according to any one of claims 3 to 5 , wherein the resin is at least one selected from the group consisting of polyvinyl butyral, cellulose acetate butyrate, and polyacryl polyol.

An ink jet recording method for performing recording by ejecting a droplet of the ink composition according to claim 3 and attaching the droplet to a recording medium.

The ink jet recording method according to claim 7, wherein a discharge amount of the ink composition discharged onto the recording medium is 0.1 to 100 mg / cm ² .

Dry weight of the metallic pigment that forms an image on said recording medium is a 0.0001~3.0mg / cm ^2, the ink jet recording method according to claim 7 or 8.

The inkjet recording method according to claim 7 , wherein the recording medium is printed by heating.

The inkjet recording method according to claim 10 , wherein the heating temperature is 30 ° C. to 80 ° C.

A recorded matter recorded by the ink jet recording method according to claim 7 .