JP2007077375A5

JP2007077375A5 -

Info

Publication number: JP2007077375A5
Application number: JP2005292674A
Authority: JP
Filing date: 2005-10-05
Publication date: 2007-07-19
Anticipated expiration: 2025-10-05

Description

本発明は、次の〔１〕〜〔４〕を提供する。
〔１〕顔料（Ｂ）を含有するビニルポリマー粒子の水分散体、及び水１００ｇに対する溶解量（２０℃）が５ｇ以下である水不溶性有機化合物（ただし、脂肪酸誘導体を除く）（Ａ）を含有する、インクジェット記録用水分散体。
〔２〕顔料の水分散体を含有するインクジェット記録用水系インクであって、該水系インクの顔料濃度が４〜８重量％であり、インクジェット写真用紙に、インクサイズ３ｐｌ、解像度１４４０ｄｐｉ×７２０ｄｐｉでベタ印刷を行い、その印字面に対して垂直方向からレーザー光を照射したときの反射光量の、印字方向に対して垂直方向の相関距離が４μｍ以上であるインクジェット記録用水系インク。
〔３〕前記水系インクを、インクジェット記録装置を用いて印字した印字物。
〔４〕下記工程（１）〜（３）を有し、工程（１）〜（３）の少なくともいずれかの工程中又は工程後に、水不溶性有機化合物（ただし、脂肪酸誘導体を除く）を存在させてなる、前記インクジェット記録用水分散体の製造方法。
工程（１）：水不溶性ポリマー、有機溶媒、着色剤、及び水を含有する混合物を得る工程
工程（２）：工程（１）で得られた混合物を分散処理する工程
工程（３）：工程（２）得られた分散体から前記有機溶媒を除去して、着色剤を含有する水不溶性ポリマー粒子の水分散体を得る工程 The present invention provides the following [1] to [4].
[1] Contains an aqueous dispersion of vinyl polymer particles containing the pigment (B) and a water-insoluble organic compound (excluding fatty acid derivatives) (A) having a solubility in 100 g of water (20 ° C.) of 5 g or less. An aqueous dispersion for inkjet recording.
[2] A water-based ink for ink-jet recording containing an aqueous dispersion of a pigment, wherein the water-based ink has a pigment concentration of 4 to 8% by weight, and is solid on ink-jet photographic paper with an ink size of 3 pl and resolution of 1440 dpi × 720 dpi. A water-based ink for inkjet recording, in which the correlation distance in the vertical direction with respect to the printing direction is 4 μm or more with respect to the amount of light reflected when the printing surface is irradiated with laser light from the vertical direction.
[3] Printed matter obtained by printing the water-based ink using an ink jet recording apparatus.
[4] The following steps (1) to (3) are included, and a water-insoluble organic compound (excluding the fatty acid derivative) is allowed to exist during or after at least one of steps (1) to (3). A method for producing the water dispersion for ink jet recording.
Step (1): Step of obtaining a mixture containing a water-insoluble polymer, an organic solvent, a colorant, and water Step (2): Step of dispersing the mixture obtained in Step (1) Step (3): Step ( 2) Step of removing the organic solvent from the obtained dispersion to obtain an aqueous dispersion of water-insoluble polymer particles containing a colorant.

Claims

Inkjet containing water dispersion of vinyl polymer particles containing pigment (B) and water-insoluble organic compound (excluding fatty acid derivative) (A) having a dissolution amount (20 ° C.) of 5 g or less in 100 g of water Water dispersion for recording.

The water-insoluble organic compound (A) has two or more ester or ether bonds in the molecule, the ester or ether compound (f), and / or one or more ester or ether bonds in the molecule, and a carboxy group The ester or ether compound (g) having at least one functional group selected from the group consisting of sulfonic acid group, phosphoric acid residue, carbonyl group, epoxy group and hydroxyl group. An aqueous dispersion for inkjet recording.

The water dispersion for inkjet recording according to claim 1 or 2, wherein the water-insoluble organic compound (A) is at least one selected from the group consisting of a phosphate ester, an aliphatic di- or tricarboxylic acid ester, and an aromatic carboxylic acid ester. .

The water dispersion according to any one of claims 1 to 3, wherein a part of the water-insoluble organic compound (A) is contained in vinyl polymer particles .

The water dispersion for inkjet recording according to any one of claims 1 to 4, wherein a weight ratio of [water-insoluble organic compound (A) / vinyl polymer particles ] in the water dispersion is 1/100 to 5/1. .

The water dispersion for inkjet recording according to any one of claims 1 to 5, wherein the content of the water-insoluble organic compound (A) in the water dispersion is 0.11 to 10% by weight.

The water dispersion for inkjet recording according to any one of claims 1 to 6, wherein the water-insoluble organic compound (A) has a Log P value of -1 to 11.

The water dispersion for ink jet recording according to any one of claims 1 to 7, wherein the value of [[Log P value of water-insoluble organic compound (A)]-[Log P value of vinyl polymer ]] is -4 to 8.

9. The water-insoluble vinyl polymer obtained by copolymerizing a monomer mixture containing (a) a salt-forming group-containing monomer, (b) a macromer and / or (c) a hydrophobic monomer. The aqueous dispersion for inkjet recording as described.

A water-based ink for ink-jet recording, comprising the water dispersion according to claim 1.

A water-based ink for ink-jet recording containing an aqueous dispersion of a pigment, wherein the water-based ink has a pigment concentration of 4 to 8% by weight, and is solid-printed on ink-jet photographic paper at an ink size of 3 pl and a resolution of 1440 dpi × 720 dpi. A water-based ink for ink jet recording in which the correlation distance in the vertical direction with respect to the printing direction of the amount of light reflected when the laser beam is applied to the printing surface from the vertical direction is 4 μm or more.

The printed matter which printed the water-system ink of Claim 10 or 11 using the inkjet recording device.

The following steps (1) to (3) are included, and a water-insoluble organic compound (excluding a fatty acid derivative) is allowed to exist during or after at least one of steps (1) to (3). The manufacturing method of the water dispersion for inkjet recording in any one of Claims 1-9.
Step (1): Step of obtaining a mixture containing a water-insoluble polymer, an organic solvent, a colorant, and water Step (2): Step of dispersing the mixture obtained in Step (1) Step (3): Step ( 2) Step of removing the organic solvent from the obtained dispersion to obtain an aqueous dispersion of water-insoluble polymer particles containing a colorant.