Aqueous inkjet ink composition

• US 7,338,988 B2
• Filed: 11/03/2003
• Issued: 03/04/2008
• Est. Priority Date: 11/12/2002
• Status: Expired due to Fees

• Current Assignee: Rohm and Haas Company (Dow, Inc.)
• Original Assignee: Rohm and Haas Company (Dow, Inc.)
• Inventors: Hesler, Carl Michael, Johnson, Eric Alvin
• Primary Examiner(s): Lipman; Bernard
• Application Number:
  US10/699,900
• Publication Number:
  US 20040092623A1
• Time in Patent Office: 1,583 Days
• Field of Search: 523/160, 523/161
• US Class Current: 523/160
• CPC Class Codes: C09D 11/30 Inkjet printing inks
• CPC Class Codes: C09D 11/322 Pigment inks

Abstract

An aqueous inkjet ink composition suitable for printing on a hydrophobic surface such as a vinyl surface including an aqueous emulsion polymer having a glass transition temperature (Tg) of from −40° C. to 150° C.; a pigment; and a water-soluble surface agent is provided. Also provided is a method for providing an image on a hydrophobic surface and the image so provided.

Claims

1. A method for providing an image on a hydrophobic surface consisting essentially of:

forming an aqueous inkjet ink composition consisting essentially of an aqueous emulsion polymer having a Tg of from 40°

C. to 80°

C.;

a pigment;

a surfactant selected from the group consisting of anionic surfactants, nonionic surfactants, and mixtures thereof; and

a water-soluble surface agent;

jetting said ink composition onto said hydrophobic surface; and

drying, or allowing to dry, said ink composition.

2. The method of claim 1 wherein said hydrophobic surface comprises polyvinyl chloride.

3. An image on a hydrophobic surface formed by the method of claim 1.

4. The method of claim 1 wherein the water-soluble surface agent is selected from the group of monoalkyl ethers of alkylene glycols, wherein the alkyl is selected from C1-C4 alkyl and the alkylene glycol is selected from mono-, di-, and tri-ethylene glycol and mono-, di-, and tri- propylene glycol;

2-pyrol;

N-methylpyrollidone;

sulfolane; and

mixtures thereof.

5. The method of claim 1 wherein the amount of water-soluble surface agent in the ink is from 5% to 15%, by weight based on the total weight of the ink.

6. The method of claim 1 wherein the amount of surfactant is effective to provide a surface tension of the inkjet ink composition of from 22 dynes/cm to 36 dynes/cm.