CLEANABLE WATERBORNE POLYURETHANE COATINGS

• US 20100233431A1
• Filed: 02/09/2010
• Published: 09/16/2010
• Est. Priority Date: 02/13/2009
• Status: Abandoned Application

• Current Assignee: Covestro LLC (Covestro AG)
• Original Assignee: Bayer Materialscience LLC (Covestro AG)
• Inventors: Allen, Kathy J., Eastman, Jeanette J., Best, Kurt E.
• Application Number:
  US12/702,453
• Publication Number:
  US 20100233431A1
• Time in Patent Office: Days
• US Class Current: 428/141
• CPC Class Codes: C08G 18/0828 containing sulfonate groups or groups forming them
• CPC Class Codes: C08G 18/6254 Polymers of alpha-beta ethylenically unsaturated carboxylic acids and of esters of these acids containing hydroxy groups
• CPC Class Codes: C08G 18/792 formed by oligomerisation of aliphatic and/or cycloaliphatic isocyanates or isothiocyanates
• CPC Class Codes: C08G 18/808 Monoamines
• CPC Class Codes: C09D 175/04 Polyurethanes
• CPC Class Codes: Y10T 428/24355 Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]

Abstract

The present invention relates to a cleanable, waterborne polyurethane dispersion comprising the reaction product of:

• • A) one or more OH-functional acrylate dispersions and
  • B) one or more CAPS-modified polyisocyanates.

Claims

1. A cleanable, waterborne polyurethane dispersion comprising the reaction product of:

A) one or more OH-functional acrylic dispersions and

B) one or more CAPS-modified polyisocyanates.

2. The dispersion of claim 1, wherein component A) comprises at least two OH-functional acrylic dispersions.

3. The dispersion of claim 1, wherein component B) comprises at least one CAPS-modified polyisocyanate based on an aliphatic diisocyanate.

4. The dispersion of claim 3, wherein the aliphatic diisocyanate is 1,6-diisocyanatohexane.

5. A method of producing a cleanable coating on a substrate comprising applying the dispersion of claim 1 to the substrate and curing the coating composition.

6. A coating produced according to the method of claim 5.

7. The coating of claim 6, wherein the surface energy of the coating is greater than 31.0 dynes/cm.

8. The coating of claim 7, wherein the surface roughness of the coating is greater than 200 nm.

9. The coating of claim 8, wherein the surface roughness of the coating is between 200 and 300 nm.

10. The coating of claim 6, wherein the surface roughness of the coating is between 10 and 300 nm.