Durable Multilayer Inkjet Recording Media Topcoat

• US 20110039043A1
• Filed: 08/12/2009
• Published: 02/17/2011
• Est. Priority Date: 08/12/2009
• Status: Active Grant

• Current Assignee: Brady Worldwide Incorporated (Brady Corporation)
• Original Assignee: Brady Worldwide Incorporated (Brady Corporation)
• Inventors: Klemann, Bruce M.
• Granted Patent: US 8,133,556 B2
• Time in Patent Office: Days
• US Class Current: 428/32.37
• CPC Class Codes: B41M 5/502 characterised by structural details, e.g. multilayer materials supports, backcoats or intermediate layers for thermal dye transfer donor and receiver sheets B41M5/41, B41M5/42
• CPC Class Codes: B41M 5/506 Intermediate layers
• CPC Class Codes: B41M 5/5218 characterised by inorganic additives, e.g. pigments, clays
• CPC Class Codes: C09D 177/08 from polyamines and polymerised unsaturated fatty acids
• CPC Class Codes: Y10T 428/24802 Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]

Abstract

Two-layer receiver coatings particularly well adapted for use in inkjet printing comprise:

• A. A base layer comprising:
  • 1. First pigment particles having (a) a number average particle size of 3-25 microns (μm), and (b) at least one of (i) an oil absorption value of at least 150 g oil/100 particles, and (ii) a pore volume of at least about 1.2 cubic meters per gram (cm³/g); and
  • 2. Water-insoluble binder resin having a surface energy greater than 40 dyne per centimeter (dyn/cm);
  • the first pigment particles and water-insoluble binder resin present at a weight ratio of 0.75 to 2; and
• B. An imaging layer comprising:
  • 1. Second pigment particles having (a) a number average particle size of 0.01-4 (μm) aggregated to form an inter-particle region of submicron pores, and (b) a pore volume of 0.4 to 2.2 (cm³/g); and
  • 2. Water-insoluble binder resin having a surface energy greater than 40 (dyn/cm);
    the second pigment particles and water-insoluble binder resin present at a weight ratio of 0.75 to 2.

Claims

1. A two-layer receiver coating comprising:

A. A base layer comprising;

1. First pigment particles having (a) a number average particle size of 3-25 microns (μ

m), and (b) at least one of (i) an oil absorption value of at least 150 g oil/100 particles, and (ii) a pore volume of at least about 1.2 cubic meters per gram (cm³/g); and

2. Water-insoluble binder resin having a surface energy greater than 40 dyne per centimeter (dyn/cm);

 

the first pigment particles and water-insoluble binder resin present at a weight ratio of 0.75 to 2; and

B. An imaging layer comprising;

1. Second pigment particles having (a) a number average particle size of 0.01-4 (μ

m) aggregated to form an inter-particle region of submicron pores, and (b) a pore volume of 0.4 to 2.2 (cm³/g); and

2. Water-insoluble binder resin having a surface energy greater than 40 (dyn/cm);

 

the second pigment particles and water-insoluble binder resin present at a weight ratio of 0.75 to 2.

2. The receiver coating of claim 1 in which the first and second pigment particles are at least one of silica and alumina.

3. The receiver coating of claim 1 in which the first pigment particles are silica.

4. The receiver coating of claim 3 in which the first pigment particles have a Mohs hardness of 4-5.

5. The receiver coating of claim 1 in which the water-insoluble binder resin of the base layer is the same as the water-insoluble binder resin of the imaging layer.

6. The receiver coating of claim 1 in which the water-insoluble binder resin of the base layer is the same as the water-insoluble binder resin of the imaging layer.

7. The receiving coating of claim 1 in which the water-insoluble binder resin in both the base and imaging layers is crosslinked.

8. The receiver coating of claim 1 in which at least one of the base and imaging layers further comprises a UV stabilizer.

9. The receiver coating of claim 1 in which the base layer has a coating weight of 8-32 g/m².

10. The receiver coating of claim 1 in which the imaging layer has a coating weight of 0.5-1.2 g/m².

11. The receiver coating of claim 1 in which the pigment particles of the base layer comprise at least one of Syloid C805, Syloid C807, Syloid C809, Syloid C812, Sylojet P405, Sylojet P407, Sylojet P409, Sylojet P412, Syloid W500, Sylysia 320, and Sylysia 350.

12. The receiver coating of claim 1 in which the pigment particles of the imaging layer comprise at least one of Sylojet A25, Sylojet C30, Sylojet 710A, Sylojet 710C, Sylysia 310P, Sylysia 320, and Sylysia 350.

13. The receiver coating of claim 1 in which the pigment particles of the imaging layer comprise at least one of a boehmite type of hydrated alumina.

14. The receiver coating of claim 1 in which the water-soluble binder resin of both the base and imaging layers comprises a non-cationic, alcohol-soluble, water-insoluble compound dissolved in an alcoholic liquid medium.

15. The receiver coating of claim 1 in which the water-soluble binder resin of both the base and imaging layers comprises an alcohol-soluble, melt-polymerized polyamide consisting essentially of recurring carboxamido groups and at least two different species of recurring hydrocarbylene groups selected from the group consisting of aliphatic and alicyclic groups of 2 to 40 carbon atoms as integral parts of the main polymer chain, and having at least 3 different recurring polyamide repeat units.

16. The receiver coating of claim 1 in which the water-soluble binder resin of both the base and imaging layers is an aqueous dispersion of a non-cationic, water-insoluble polyamide.

17. The receiver coating of claim 1 on a support.

18. The receiver coating of claim 17 in which the support is one of paper, polymer-coated paper, synthetic paper, polymer-coated fabric or mesh, vinyl, polyethylene, polypropylene, polyester and polystyrene.

19. The receiver coating of claim 1 bearing an image printed by at least one of an aqueous inkjet, solvent inkjet, UV-curable inkjet, laser and dot matrix printer.