Anti-smudge and anti-graffiti compositions

• US 10,023,751 B2
• Filed: 10/16/2015
• Issued: 07/17/2018
• Est. Priority Date: 10/16/2014
• Status: Active Grant

• Current Assignee: Queen's University At Kingston
• Original Assignee: Queen's University At Kingston
• Inventors: Hu, Heng, Liu, Guojun, Rabnawaz, Muhammad
• Primary Examiner(s): Salamon, Peter A
• Application Number:
  US14/885,414
• Publication Number:
  US 20160200937A1
• Time in Patent Office: 1,005 Days
• Field of Search: None
• CPC Class Codes: C08F 2438/01 Atom Transfer Radical Polymerization [ATRP] or reverse ATRP
• CPC Class Codes: C08F 293/005 using free radical "living" or "controlled" polymerisation, e.g. using a complexing agent
• CPC Class Codes: C08G 18/61 Polysiloxanes
• CPC Class Codes: C08G 18/6229 Polymers of hydroxy groups containing esters of acrylic or methacrylic acid with aliphatic polyalcohols
• CPC Class Codes: C08G 18/6295 Polymers of silicium containing compounds having carbon-to-carbon double bonds
• CPC Class Codes: C08G 18/792 formed by oligomerisation of aliphatic and/or cycloaliphatic isocyanates or isothiocyanates
• CPC Class Codes: C08G 18/798 containing urethdione groups
• CPC Class Codes: C08G 18/8074 Lactams
• CPC Class Codes: C08G 77/442 containing vinyl polymer sequences
• CPC Class Codes: C08G 77/458 containing polyurethane sequences
• CPC Class Codes: C08L 101/02 characterised by the presence of specified groups , e.g. terminal or pendant functional groups
• CPC Class Codes: C08L 63/00 Compositions of epoxy resins; Compositions of derivatives of epoxy resins
• CPC Class Codes: C09D 163/00 Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
• CPC Class Codes: C09D 175/04 Polyurethanes
• CPC Class Codes: C09D 183/10 Block or graft copolymers containing polysiloxane sequences obtained by polymerising a compound having a carbon-to-carbon double bond on to a polysiloxane C09D151/08, C09D153/00
• CPC Class Codes: C09D 5/16 Antifouling paints; Underwater paints

Abstract

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.

Claims

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.

6. The coating composition of claim 4, 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.

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.

7. The coating composition of claim 5, wherein the coating is clear.

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.