Ink for ink-jet recording

• US 7,414,083 B2
• Filed: 09/23/2003
• Issued: 08/19/2008
• Est. Priority Date: 09/24/2002
• Status: Active Grant

• Current Assignee: Brother Kogyo Kabushiki Kaisha (Brother Industries Limited)
• Original Assignee: Brother Kogyo Kabushiki Kaisha (Brother Industries Limited)
• Inventors: Okada, Mayuko, Higashiyama, Shunichi, Fujioka, Masaya
• Primary Examiner(s): Cain; Edward J
• Application Number:
  US10/668,574
• Publication Number:
  US 20040059021A1
• Time in Patent Office: 1,792 Days
• Field of Search: 523/160, 523/161, 106/31.85
• US Class Current: 523/160
• CPC Class Codes: C09D 11/30 Inkjet printing inks
• CPC Class Codes: C09D 11/324 containing carbon black

Abstract

An ink for ink-jet recording contains tripropylene glycol normal butyl ether or dipropylene glycol normal propyl ether, an acrylic polymer, a water-insoluble coloring agent, and water. The ink simultaneously satisfies the straight travel stability of ink droplets during the discharge with an ink-jet recording apparatus, the recovery performance upon introduction into a recording head of the ink-jet recording apparatus, the fixation performance of printed matters, and the drying performance after the printing.

Claims

1. An ink for ink-jet recording comprising tripropylene glycol normal butyl ether, an acrylic polymer, a water-insoluble coloring agent, and water;

wherein a blending ratio of the tripropylene glycol normal butyl ether with respect to the acrylic polymer is 0.5 to 2 on the basis of weight; and

wherein a content of the acrylic polymer is 0.1 to 5% by weight with respect to a total amount of the ink.

2. The ink for ink-jet recording according to claim 1, wherein the water insoluble coloring agent is self-dispersing carbon black.

3. The ink for ink-jet recording according to claim 1, wherein a content of the tripropylene glycol normal butyl ether is 0.5 to 5% by weight with respect to a total amount of the ink.

4. An ink cartridge comprising the ink as defined in claim 1.

5. An ink for ink-jet recording comprising dipropylene glycol normal propyl ether, an acrylic polymer, a water-insoluble coloring agent, and water;

wherein a blending ratio of the dipropylene glycol normal propyl ether with respect to the acrylic polymer is 0.5 to 2 on the basis of weight; and

wherein a content of the acrylic polymer is 0.1 to 5% by weight with respect to a total amount of the ink.

6. The ink for ink-jet recording according to claim 5, wherein the water-insoluble coloring agent is self-dispersing type carbon black.

7. The ink for ink-jet recording according to claim 5, wherein a content of the dipropylene glycol normal propyl ether is 0.5 to 5% by weight with respect to a total amount of the ink.

8. An ink cartridge comprising the ink as defined in claim 5.