METHODS OF SLIDE COATING TWO OR MORE FLUIDS

• US 20110059249A1
• Filed: 03/24/2009
• Published: 03/10/2011
• Est. Priority Date: 03/26/2008
• Status: Abandoned Application

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Ludemann, Thomas J., Hedding, Brent A., Baetzold, John P., Yapel, Robert A., Norton, Daniel V.
• Application Number:
  US12/934,318
• Publication Number:
  US 20110059249A1
• Time in Patent Office: Days
• US Class Current: 427/372.2
• CPC Class Codes: B05C 5/007 Slide-hopper coaters, i.e. apparatus in which the liquid or other fluent material flows freely on an inclined surface before contacting the work
• CPC Class Codes: B05D 1/26 performed by applying the liquid or other fluent material from an outlet device in contact with, or almost in contact with, the surface
• CPC Class Codes: B05D 2252/02 of indefinite length
• CPC Class Codes: B05D 2601/20 used for non-pigmentation effect
• CPC Class Codes: B05D 7/542 the two layers being cured or baked together

Abstract

A method of slide coating that includes providing a first fluid including at least one solvent and at least one polymer; providing a second fluid, including multi unit polymeric precursors; flowing the first fluid down a first slide surface, to create a first fluid layer on the first slide surface; flowing the second fluid down a second slide surface; coating the substrate with the first and second fluid by flowing the first fluid layer and the second fluid layer from the first slide surface to the substrate; moving the substrate; and curing the first fluid, the second fluid, or some combination thereof.

Claims

1. A method of slide coating comprising:

providing a first fluid, wherein the first fluid comprises at least one solvent and at least one polymer;

providing a second fluid, wherein the second fluid comprises multi unit polymeric precursors;

flowing the first fluid down a first slide surface, to create a first fluid layer on the first slide surface, the first slide surface being positioned adjacent a substrate;

flowing the second fluid down a second slide surface, the second slide surface positioned relative to the first slide surface such that the second fluid flows from the second slide surface to above the first slide surface onto the first fluid layer to create the second fluid layer on the first slide surface;

coating the substrate with the first and second fluid by flowing the first fluid layer and the second fluid layer from the first slide surface to the substrate;

moving the substrate; and

curing the first fluid, the second fluid, or some combination thereof,

wherein the at least one solvent in the first fluid is compatible with the second multi unit polymeric precursor of the second fluid and the polymer of the first fluid is compatible with the substrate.

2. The method according to claim 1, wherein the first fluid comprises at least about 2.2% by weight of the polymer.

3. The method according to claim 1, wherein the first fluid has a viscosity of about 5 centipoise or less.

4. The method according to claim 3, wherein the first fluid is coated onto the substrate at a thickness of about 10 micrometers or less.

5. The method according to claim 1, wherein the second fluid further comprises single unit polymeric precursors, one or more solvents and not greater than about 10% by weight of water.

8. The method according to claim 1, wherein the multi unit polymeric precursors are acrylates. Selected from epoxy acrylates, urethane acrylates, carboxylic acid half esters, polyester acrylates, acrylated acrylics, or combinations thereof.

10. The method according to claim 1, wherein the second fluid does not have more than about 15% by weight based on total resin amount of any polymeric component.

12. The method according to claim 1, wherein the second fluid further comprises beads.

13. The method according to claim 1, wherein the second fluid is coated onto the substrate at a thickness of about 10 microns or thicker.

14. The method according to claim 1, further comprising drying at least a portion of the first fluid, the second fluid, or some combination thereof before curing.

15. The method according to claim 1, wherein curing is accomplished using a source of ultraviolet radiation, a source of infrared radiation, a source of x-rays, a source of gamma-rays, a source of visible light, a source of microwaves, an electron beam source, heat, or combinations thereof.

16. The method according to claim 1, wherein the substrate is moved at a speed of at least about 0.5 meters per second.

17. The method according to claim 1, wherein the polymer in the first fluid enhances adhesion of the first fluid layer to the substrate.

18. The method according to claim 14, wherein the polymer in the first fluid is not the same as the multi unit polymeric precursor once cured.

6. (canceled)

7. (canceled)

11. The method according to claim 7, wherein the viscosity of the second fluid is at least about 10 times the viscosity of the first fluid.

9. (canceled)

19. (canceled)

20. (canceled)

21. (canceled)