Unique Coatings with Phase Separation Properties for Use as Foul Release and Anti-Graffiti Paints (RFT-158)

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Invention Summary


Scientists at North Dakota State University have created several novel coating compositions that spontaneously phase separate to form uniform micro-domains on the coating surface.  This provides a multiphase topographical structure with a textured surface that inhibits adhesion, making it an ideal basis for fouling release and anti-graffiti paints and coatings.


  • The micro-domain projections have low adhesion properties which are further augmented by the surface texture that limits the effective surface area for adhesion. Properties include:
  • Ideal for Anti-Graffiti Coatings: Ideally suited for use in anti-graffiti coatings or on release paper for adhesive labels.
  • Uniform Surface Structure Textured surface develops with a predictable formation and design.
  • Stabile Composition: Durable under a variety of environmental conditions, including soaking in water for extended periods of time.
  • Minimizes Adhesion by External Material: Coating texture limits contact points with any material applied, while contact surfaces also discourage adhesion.
  • Fouling Release Coatings Reduced adhesion and surface texture deters the settlement and growth of organisms such as barnacles.


This invention involves a unique siloxane-urethane composition that results in a spontaneous formation of a stable micro-topographical surface structure. Design conditions cause the siloxane-rich domains to phase-separate during the film formation process, restricting their ability to fully cover the surface of the coating. This system generates stable microstructured surfaces without using multi-step templating and molding methods traditionally used to produce surface topographical features. The microstructured coating can also be prepared and applied over a large area, inhibiting the adhesion of organisms or other substances to large surfaces.  Micro-domain projections extrude approximately five microns from the surface with a separation distance of five microns between projections.


This technology has an issued US Patent No. 8,062,729. It is currently available for licensing/partnering opportunities.


Henry Nowak, Technology Manager


RFT, 158, RFT158 

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