Recording liquid and ink-jet recording method making recording unit, ink cartridge, and ink-jet recording apparatus making use thereof

• US 5,160,370 A
• Filed: 05/14/1991
• Issued: 11/03/1992
• Est. Priority Date: 12/27/1988
• Status: Expired due to Term

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Noguchi, Hiromichi, Suga, Yuko
• Primary Examiner(s): Dixon, Jr., William R.
• Assistant Examiner(s): Einsmann, Margaret V.
• Application Number:
  US07/700,949
• Time in Patent Office: 539 Days
• Field of Search: 106/20
• US Class Current: 524/376
• CPC Class Codes: C09D 11/322 Pigment inks

Abstract

A recording liquid including a pigment, a water-soluble resin, a water-soluble organic solvent, and water, wherein, of the water-soluble resin, water-soluble resin that is in the state of being dissolved in the recording liquid without being absorbed on the pigment is contained in an amount of not more than 2% by weight; and the water-soluble organic solvent comprises at least one of a polyhydric alcohol and an alkyl ether thereof, and an aliphatic monohydric alcohol. This recording liquid is used in an ink-jet recording method, recording unit, ink cartridge, and ink-jet recording apparatus.

Claims

1. A recording liquid comprising a pigment, a water-soluble resin, a water-soluble organic solvent, and water, wherein;

of the water-soluble resin, water-soluble resin that is dissolved in the recording liquid without being absorbed on the pigment is contained in an amount of not more than 2% by weight; and

the water-soluble organic solvent comprises (i) an aliphatic monohydric alcohol, and (ii) at least one of a polyhydric alcohol and an alkyl ether thereof.

2. A recording liquid according to claim 1, wherein said aliphatic monohydric alcohol is ethyl alcohol.

3. A recording liquid according to claim 1, wherein said aliphatic monohydric alcohol is contained in an amount ranging from 3 to 15% by weight.

4. A recording liquid according to claim 1, wherein said at least one of a polyhydric alcohol and an alkyl ether thereof is contained in an amount ranging from 10 to 50% by weight.

5. A recording liquid comprising a pigment, a water-soluble resin, a water-soluble organic solvent, and water, wherein;

of the water-soluble resin, water-soluble resin that is dissolved in the recording liquid without being absorbed on the pigment is contained in an amount of not more than 2% by weight; and

the water-soluble organic solvent comprises (i) an aliphatic monohydric alcohol, and (ii) at least one of a polyhydric alcohol and an alkyl ether thereof; and

the water-soluble resin has an acid value of from 50 to 300.

6. A recording liquid according to claim 5, wherein said aliphatic monohydric alcohol is ethyl alcohol.

7. A recording liquid according to claim 5, wherein said aliphatic monohydric alcohol is contained in an amount ranging from 3 to 15% by weight.

8. A recording liquid according to claim 5, wherein said at least one of a polyhydric alcohol and an alkyl ether thereof is contained in an amount ranging from 10 to 50% by weight.

9. A recording liquid according to claim 5, wherein said water-soluble resin has an acid value of 70 to 250.