Aqueous ink for inkjet, inkjet recorder and inkjet recording method

Patent metadata

Field	Value
Publication number	US-9446606-B2
Application number	US-201414505576-A
Country	US
Kind code	B2
Filing date	Oct 3, 2014
Priority date	Oct 24, 2013
Publication date	Sep 20, 2016
Grant date	Sep 20, 2016

Abstract

An aqueous ink for inkjet includes water; a hydrosoluble organic solvent; a pigment; and a particulate resin. The hydrosoluble organic solvent includes 2,3-butanediol and 1,2-propanediol at a weight ratio (2,3-butanediol/1,2-propanediol) of from 98/2 to 60/40.

First claim

What claimed is:

1. An aqueous ink for inkjet, comprising:
water;
a hydrosoluble organic solvent;
a pigment; and
a particulate resin,
wherein the hydrosoluble organic solvent comprises 2,3-butanediol and 1,2-propanediol at a weight ratio (2,3-butanediol/1,2-propanediol) of from 98/2 to 60/40, and
wherein the hydrosoluble organic solvent further comprises 1,3-butanediol.

2. The aqueous ink for inkjet of claim 1 , wherein the ink comprises the 2,3-butanediol in an amount of from 5 to 40% by weight.

3. The aqueous ink for inkjet of claim 1 , wherein the hydrosoluble organic solvent further comprises a member selected from the group consisting of 1,3-propanediol and 1,2-butanediol.

4. The aqueous ink for inkjet of claim 1 , wherein the ink comprises the particulate resin more than the pigment.

5. The aqueous ink for inkjet of claim 1 , wherein the particulate resin has a volume-average particle diameter not greater than 50 nm.

6. An inkjet recorder, comprising:
an ink container or an ink cartridge configured to contain the aqueous ink for inkjet according to claim 1 ;
an inkjet recording head or a recording unit having the inkjet recording head configured to forms the ink into a droplet with an energy to discharge; and
a heater configured to heat the ink after printed.

7. The inkjet recorder of claim 6 , wherein the ink is heated at from 40 to 80° C.

8. An inkjet recording method, comprising:
applying a heat energy or a mechanical energy to the aqueous ink for inkjet according to claim 1 to discharge and record on a nonpermeable substrate.

Assignees

• Fujii Ichiroh
• Toda Naohiro
• Nakagawa Tomohiro
• Nagashima Hidefumi
• Furukawa Juichi
• Ricoh Co Ltd

Inventors

• Fujii Ichiroh
• Toda Naohiro
• Nakagawa Tomohiro
• Nagashima Hidefumi
• Furukawa Juichi

Classifications

• C09D11/10

  based on artificial resins · CPC title

• C09D175/06

  from polyesters · CPC title

• B41J11/002 Primary

  Curing or drying the ink on the copy materials, e.g. by heating or irradiating · CPC title

• C09D11/102

  containing macromolecular compounds obtained by reactions other than those only involving unsaturated carbon-to-carbon bonds · CPC title

• C09D11/322

  Pigment inks · CPC title