Removable coating and application method

Details Removable coating and application method Removable coating and application method

2008-09-16

2011-11-15

Elhilo, Eisa (Department: 1761)

Coating processes

Applying superposed diverse coating or coating a coated base

C427S404000, C427S407100, C427S412200, C427S417000, C427S418000, C427S419500, C427S419800

Reexamination Certificate

active

08057861

ABSTRACT:
A removable, colored X-alginate coating composition includes an aqueous solution of sodium alginate including a colorant and an aqueous solution containing divalent cations. The applied coating composition may be in the form of a thin film coating having a thickness of 10 nanometers or more and may include more than a single layer. The X-alginate coating composition is substantially removable from the application surface on-demand using a suitable chelator. A reversible, colored X-alginate coating system includes a colored X-alginate coating composition and a colored X-alginate coating composition remover. The remover may be a chelator. A method for reversibly coloring a surface includes applying an aqueous solution of sodium alginate including a colorant onto the surface and applying an aqueous solution containing divalent ions onto the surface. Water may subsequently be applied to the coated surface as a final washing step.

REFERENCES:
patent: 6653265 (2003-11-01), Rossi et al.
patent: 2004/0224098 (2004-11-01), Winterton et al.

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