Ink jet recording ink, method for producing the same, and ink jet recording method

Patent 6153001 Issued on November 28, 2000. Estimated Expiration Date:

December 15, 2018. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Ink jet ink formulations containing carbon black products
Patent #: 5571311
Issued on: 11/05/1996
Inventor: Belmont, et al.

Ink jet ink formulations containing modified carbon products
Patent #: 5630868
Issued on: 05/20/1997
Inventor: Belmont, et al.

Recording ink composition and recording method using the same
Patent #: 5879439
Issued on: 03/09/1999
Inventor: Nagai, et al.

Surface-treated organic pigment and process for the production thereof
Patent #: 5928419
Issued on: 07/27/1999
Inventor: Uemura, et al.

Water-based ink-jet recording fluid Patent #: 5972087
Issued on: 10/26/1999
Inventor: Uraki, et al.

Inventors

Assignee

Fuji Xerox Co., Ltd.

Application

No. 210944 filed on 12/15/1998

US Classes:

106/31.65, Specified particle size or coated particle containing106/31.75, Organic nitrogen compound containing106/31.86Organic oxygen compound containing

Examiners

Primary: Klemanski, Helene

Attorney, Agent or Firm

Oliff & Berridge, PLC

Foreign Patent References

64-79278 JP. 03/12/1989
B2-1-49369 JP. 10/12/1989
5-230410 JP. 09/12/1993
6-128517 JP. 05/12/1994
8-3498 JP. 01/12/1996
8-81646 JP. 03/12/1996
8-319444 JP. 12/12/1996

International Class

C09D 011/02

Foreign Application Priority Data

1997-12-18 JP

Abstract

Disclosed is an ink jet recording ink comprising water, an aqueous organic solvent, a surfactant and a self-dispersible pigment, wherein the number average particle diameter of dispersed particles of the pigment is from 15 to 100 nm, given that mv is the volumetric average particle diameter of the dispersed particles of said pigment and mn is the number average diameter of the dispersed particles of said pigment, mv/mn is less than or equal to 3, the number of particles having a particle diameter greater than or equal to 0.5 μm among the dispersed particles of the pigment contained in one liter of the ink is less than or equal to 7.5×1010, the surface tension of the ink is less than or equal to 60 mN/m, the electroconductivity of the ink is from 0.05 to 0.4 S/m and the pH of the ink is from 6 to 11. This ink provides a high storage stability and a uniform image having high water-resistance, resolution, and density can be obtained.