Anti-smudge and anti-graffiti compositions
Polyurethane-based and epoxy-based coating compositions are described that provide coatings and adhesives that are clear, amphiphobic and durable. Both water and hexadecane readily slide off these surfaces without leaving a residue. Coatings with thicknesses ranging from about 10 nm to about 10 μm exhibited excellent transmittance properties. Such films exhibited durability against abrasion, ink-resistance, anti-graffiti, anti-fingerprint, and strong adhesion to glass surfaces. The coatings are applicable to electronic devices, fabrics, glass, etc. to prepare optically clear, stain-resistant, and smudge-resistant surfaces.
1. A coating composition prepared by combining:
a graft copolymer that is a polyol, polyamine, polyimine, poly(carboxylic acid), or polyanhydride that comprises a polysiloxane, PFPE, PEO, PIB, or PB moiety;
di-, tri-, or poly-isocyanate; and, optionally
a polyol, polyamine, polyimine, poly(carboxylic acid), and/or polyanhydride that does not comprise a polysiloxane, PFPE, PEO, PIB, nor PB moiety;
wherein the coating composition comprises about 0.1wt % to about 40 wt % siloxane, fluorine, PEO, PIB, or PB.
2. The coating composition of claim 1 , wherein the polyol that comprises a polysiloxane, PFPE, PEO, PIB, or PB moiety is Polyol-g-PIB.
3. The coating composition of claim 1 , wherein the polyanhydride that comprises a polysiloxane, PFPE, PEO, PIB, or PB moiety is P(S-alt-MA)-g-PEO .
4. A coating composition prepared by combining:
a graft copolymer comprising at least one functional moiety and at least one polysiloxane or PFPE moiety;
isocyanate (bi-, tri- or multi-); and
polyol, polyamine, or a combination of polyol and polyamine;
wherein a coating resulting from application of the coating composition is anti-smudge.
5. A coating composition prepared by combining:
a graft copolymer comprising at least one functional moiety and at least one poly (ethylene glycol) methyl ether (“PEO”), polyisobutylene (“PIB”), or polybutadiene (“PB”) moiety;
isocyanate (bi-, tri- or multi-); and
polyol, polyamine, or a combination of polyol and polyamine;
wherein a coating resulting from application of the coating composition is anti-smudge.
6. The coating composition of claim 4 , wherein the coating is clear.
7. The coating composition of claim 5 , wherein the coating is clear.
8. The coating composition of claim 4 , wherein the polymer and the isocyanate are allowed to react and then the polyol, polyamine, or combination of polyol and polyamine is added.
9. The coating composition claim 5 , wherein the polymer and the isocyanate are allowed to react and then the polyol, polyamine, or a combination of polyol and polyamine is added.