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Waterfast dye fixative compositions for ink jet recording sheets

Inactive Publication Date: 2004-02-19
INT PAPER CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0014] Additionally, it is another object of the present invention to provide a coating composition for use in an ink jet recording sheet having unexpected enhanced print performance, i.e., an increase in print density and print resolution along with reduced wicking and color-to color bleed.
[0016] It is a further object of this invention to provide an ink jet recording sheet that is more cost effective and easier to manufacture than the prior art ink recording sheets.

Problems solved by technology

However, since most dye fixatives and most dyes or inks are water-soluble, even if the binder is water-insoluble, the dye, which forms a printed image on the paper, will still have a tendency to run or bleed if it makes contact with water.
The high molecular weight will also make the ink jet coating more viscous, and hence more difficult to pump and coat during the manufacturing process.
However, because ink jet printers use different inks, an individual dye fixative is generally not suitable for all types of inks.
However, some coating materials are sensitive to acidic pH levels.

Method used

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  • Waterfast dye fixative compositions for ink jet recording sheets
  • Waterfast dye fixative compositions for ink jet recording sheets
  • Waterfast dye fixative compositions for ink jet recording sheets

Examples

Experimental program
Comparison scheme
Effect test

example i

[0061] The print density and waterfastness of an ink jet recording sheet according to the present invention was tested. The specific formulation tested is set forth below in Table I. This example is of a size press formulation containing a blend of two dye fixatives and starch.

1TABLE I Formulation of Dye Fixative Composition Used in Size Press Quantity Concentration Dry Weight Ratio Ingredient (g) (%) (%) Starch 25.2 10 25 Fissatore L 11.3 44 50 Sumachlor 5.0 50 25 Water 58.5 0 0 Totals 100 10 100 Fissatore L is dicyandiamide-formaldehy-de resin, CAS #26591-12-8 (Lamberti, SPA, Italy). Sumachlor is aluminum chlorohydrate, CAS # 12359-72-7 (Summit Research Labs, Flemington, NJ).

[0062] The starch used in this example was a Penford hydroxyethyl starch, designated PG-290, CAS#9005-27-0 (Penford Products, Cedar Rapids, Iowa). This starch was cooked in a starch cooker following the heating schedule recommended by the manufacturer at a concentration of 10% solids. The two dye fixatives, Fi...

example ii

[0066]

2TABLE II Formulation of Dye Fixative Composition Used in Size Press Quantity Concentration Dry Weight Ratio Ingredient (g) (%) (%) Starch 20.2 10 20 Arquad DMCB-80 6.3 80 50 Sumachlor 6.0 50 30 Water 67.5 0 0 Totals 100 10 100 Sumachlor is aluminum chlorohydrate, CAS # 12359-72-7 (Summit Research Labs, Flemington, NJ). Arquad DMCB-80 is benzyl cocoalkyl dimethyl quaternary ammonium chloride, CAS# 61789-71-7 (Akzo Nobel Chicago, IL).

[0067] The two dye fixatives, Arquad DMCB-80 and Sumachlor, were received from the manufacturers as solutions in water, with concentrations shown in Table I. These dye fixatives were added to tap water in the quantities shown in Table I. The percent solids of the solution was 10% in total solids, and the viscosity was less than 20 cps. Concentrated sodium hydroxide solution was then added to this solution while stirring to raise the pH to 7. This dye fixative mixture was then added to an equal quantity of cooked starch solution, also at 10% solids....

example iii

[0069]

3TABLE III Formulation of Dye Fixative Composition Used in Size Press Quantity Concentration Dry Weight Ratio Ingredient (g) (%) (%) Starch 20.8 10 21 Nalco CP261 9.4 40 37 Sumachlor 8.3 50 42 Water 61.5 0 0 Totals 100 10 100

[0070] The two dye fixatives, Nalco CP261 and Sumachlor, were received from the manufacturers as solutions in water, with concentrations shown in Table I. These dye fixatives were added to tap water in the quantities shown in Table I. The percent solids of the solution was 10% in total solids, and the viscosity was less than 20 cps. Concentrated sodium hydroxide solution was then added to this solution while stirring to raise the pH to 7. This dye fixative mixture was then added to an equal quantity of cooked starch solution, also at 10% solids.

[0071] Sizing of paper with no existing surface sizing was performed in the lab using the same conditions as described above in Example I. The paper was then printed and tested using the same conditions as described...

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Abstract

A coating composition comprising a blend of at least two dye fixatives, at least one of which is a cationic polymer, and at least one of the other dye fixatives is a polyvalent metal salt, to form a water-insoluble complex. The ink recording sheets comprise a composition that is absorbed into the surface of the substrate as a sizing material, or alternatively, forms a continuous layer on the substrate. The present invention also encompasses methods for making the ink jet recording sheets.

Description

[0001] This application claims the benefit of U.S. Provisional Application Serial No. 60 / 387,359 filed on Jun. 10, 2002, which is incor reference.[0002] The present invention relates to waterfast ink jet recording compositions and sheets. In particular it relates to coating compositions which are comprised of dye fixative blends which form water-insoluble complexes. These compositions are coated on at least one surface of a substrate to make an ink recording sheet. The coating composition is absorbed into the surface of the substrate as a sizing material, or alternatively, forms a continuous layer on the substrate.BACKGROUND OF INVENTION[0003] Ink jet coatings that are waterfast or waterproof are highly desirable in the ink jet printing industry. In general, there are two methods in the prior art for making an ink jet coating waterfast or waterproof. The first involves using a water-insoluble binder, such as a latex or a cross-linked polymer (e.g. cross-linked polyvinyl alcohol). By...

Claims

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Application Information

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IPC IPC(8): B41M5/00B41M5/50B41M5/52
CPCB41M5/0011B41M5/508B41M5/52B41M5/5218B41M5/5281B41M5/5236B41M5/5245B41M5/5254B41M5/5227Y10T428/31681Y10T428/31692
Inventor KOENIG, MICHAEL F.
Owner INT PAPER CO
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