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Fluorescent ink compositions and fluorescent particles

A fluorescent particle and fluorescent technology, which is applied in the direction of ink, luminescent materials, textiles and papermaking, etc., can solve the problems of clogged nozzles, clogged inkjet nozzles, and the inability to use pigments, etc.

Inactive Publication Date: 2011-11-09
XEROX CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Given the large size, these pigments cannot be used in inkjet printing (such as those using solid inks or UV-curable inks) because the pigments will create physical clogging of the inkjet nozzles
For example, when preparing a solid ink composition by adding conventional pigments to a solid ink base, pigments with a size of about 1 micron cannot be used because they tend to clog the nozzles of inkjet printers due to their larger size

Method used

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  • Fluorescent ink compositions and fluorescent particles
  • Fluorescent ink compositions and fluorescent particles
  • Fluorescent ink compositions and fluorescent particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0126] All starting materials except UNICID 700 were purchased from Sigma Aldrich. UNICID 700 was purchased from Baker Petrolite.

[0127] Preparation of trans-dicarboxylic acid-indenofluorenone

[0128]Trans-dicarboxylic acid-indenofluorenone was prepared from commercially available 2,5-dibromo-p-xylene through three steps. In the first step, a Suzuki-type reaction between 2,5-dibromo-p-xylene and p-tolylboronic acid was used to prepare product A as shown in Scheme 1 below. Specifically, 4.07 g (0.029 mol) of p-tolylboronic acid, 4.0 g (0.015 mol) of 2,5-di Bromo-p-xylene, 9.0 g (0.065 mol) potassium carbonate, 6.0 g (0.035 mol) tetramethylammonium bromide and 0.136 g (0.0014 mol) palladium acetate. The solid was purged with argon for 15 minutes, then 40 mL of distilled water was added to the reaction mixture. The temperature was raised to 70°C and the mixture was heated with stirring for about 4 hours. After 4 hours, the reaction was cooled to room temperature and an ...

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Abstract

A fluorescent solid ink, and a method for making such ink, including an ink vehicle and a fluorescent particle. The fluorescent particle includes a fluorescent pigment, such as a trans-dicarboxylic-indenofluorenone, and at least one stabilizing wax chemically attached to the fluorescent pigment. The stabilizing wax includes an amine group at its terminal end and the fluorescent pigment includes at least one carboxylic acid group, where the amine group reacts with the carboxylic acid group to form an amide bond.

Description

technical field [0001] The present invention relates generally to ink compositions, and more particularly to ink compositions containing fluorescent particles, which compositions may be useful for document security. [0002] related application [0003] U.S. Patent Application Serial No. 12 / 772,689, filed May 3, 2010 ((Attorney Docket #143787) the entire disclosure of which is hereby incorporated by reference), describes Preparation of Fluorescent Particles to Stabilize Waxes of the Fluorescent Pigments. These fluorescent particles are used in toners for printing security documents. [0004] U.S. Patent Application Serial No. 12 / 246,120, filed October 6, 2008, the entire disclosure of which is hereby incorporated by reference, describes the use of acid dissolution in the presence of "molecular dispersants" ( Acid pasting procedure) prepares the method for thioxanthene nano-pigment (fluorescence yellow). In this case, the "molecular dispersant" stabilizes the pigment by hyd...

Claims

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Application Information

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IPC IPC(8): C09D11/02
CPCC09D11/06C09D11/50C09B67/006C09K11/06D21H21/40
Inventor M·拜罗C·G·艾伦C·A·詹宁斯P·G·奥戴尔
Owner XEROX CORP