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US 2011/0300294 A1Published application
Writable-erasable surfaces
AssigneeIdeapaint, Inc.
InventorsFrank C. Nachtman, Kevin Biller, John Goscha
Life of this patent
Estimating the term…
Abstract
Writable-erasable surfaces prepared by a powder coating process are provided. The coatings have many desirable attributes. For example, the coatings (e.g., powder compositions) cure rapidly at elevated temperatures or under radiation, have low VOC emissions, and have reduced tendency to form ghost images, even after prolonged and repeated normal use.
Claims35
A powder composition comprising:
- between about 30 wt % to about 70 wt % isocyanate material;
- and
- between about 10 wt % to about 45 wt % polyol material;
- wherein the powder composition cures to form a writable-erasable coating when applied to a substrate.
1 more element
A writable-erasable product comprising:
- a cured coating extending upon a substrate and having a writable-erasable surface;
- the coating being curable from a powder composition, upon exposure to an elevated temperature, a radiation or a combination thereof;
- wherein, after the writable-erasable surface is marked with a marking material comprising a colorant and a solvent, the marking material can be erased from the writable-erasable surface to be effectively invisible.
31-43. (canceled)
45-50. (canceled)
A method of making a writable-erasable product, the method comprising:
- applying a powder composition to a substrate to form a coating extending upon the substrate;
- and
- exposing the coating to an elevated temperature or radiation to provide a cured coating defining a writable-erasable surface;
- wherein, after the writable-erasable surface is marked with a marking material comprising a colorant and a solvent, the marking material can be erased from the writable-erasable surface to be effectively invisible.
1 more element
52-56. (canceled)
Dependencies are inferred from the claim text.