Inkjet inks containing crosslinked polyurethanes

a technology of crosslinked polyurethane and inkjet printing paper, which is applied in the direction of inks, dyeing process, transportation and packaging, etc., can solve the problems of inkjet printed paper that lacks the durability required for printed paper, tends to fade quickly, and is more prone to rub off, so as to improve the water-fastness of inkjet printed paper (as well as other substrates)

Inactive Publication Date: 2005-09-29
EI DU PONT DE NEMOURS & CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0015] It was found that the water-fastness of an inkjet printed paper (as well as other substrates) can be improved by using a crosslinked polyurethane dispersoid binder in aqueous inkjet inks.

Problems solved by technology

While dyes typically offer superior color properties compared to pigments, they tend to fade quickly and are more prone to rub off.
A disadvantage of inkjet printing, in particular inkjet printing with pigmented ink, is inkjet printed paper can lack durability that is required for the printed paper.

Method used

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  • Inkjet inks containing crosslinked polyurethanes

Examples

Experimental program
Comparison scheme
Effect test

examples

[0140] Tests used to characterize the polyurethane dispersoids, the inks and the printed textiles were those commonly used in the art. Some specific procedures are listed

Printing and Testinq Techniques

[0141] The inkjet printer used in the following examples was an Epson 980.

[0142] The water-fastness was tested by printing a test image that included at least one of the inventive or comparison colors. Immediately after printing the test image, the paper was placed on a 45° Angle Plate and 2 drops of deionized water was dropped across the test image at specified time intervals. The water-fastness test was done at 10 seconds, 1 minute and 5 minutes after printing. If the image was removed by the water, or smeared, the test was considered a failed test and rated Not Good (NG). If the image was not affected by the water, it was rated OK.

[0143] The colorant dispersion, or other stable aqueous colorant, was prepared by techniques known in the inkjet art. A black pigment dispersion was ...

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Abstract

Inkjet inks are described that have, as a principal component, a crosslinked polyurethane dispersoid binder additive. These inks can be used for printing on different media, and are particularly suitable for printing on paper.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application claims priority under 35 U.S.C. §119 from U.S. Provisional Application Ser. No. 60 / 537,880 (filed Jan. 21, 2004), the disclosure of which is incorporated by reference herein for all purposes as if fully set forth. [0002] This application is related to commonly owned U.S. Application Ser. No. __ / __,__, concurrently filed herewith, entitled “Inkjet Inks Containing Crosslinked Polyurethanes”, which also claims priority under 35 U.S.C. §119 from U.S. Provisional Application Ser. No. 60 / 537,880 (filed Jan. 21, 2004).BACKGROUND OF THE INVENTION [0003] This invention pertains to inkjet inks, more specifically to pigmented inkjet inks containing crosslinked polyurethane dispersoid binders, which are particularly suitable for printing on paper and other media substrates. [0004] Inkjet recording is a printing method wherein droplets of ink are ejected through fine nozzles to form letters or figures on the surface of recording med...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C03C17/00D06P5/30
CPCC09D11/30C09D11/326Y10T428/24802D06P5/30C09D11/40B41J2/01B41J2/21B41M5/0023B41M5/0047B41M5/0088C09D11/322
Inventor BERGE, CHARLES T.LI, XIAOQING
Owner EI DU PONT DE NEMOURS & CO
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