Anti-smudge and anti-graffiti compositions

Patent metadata

Field	Value
Publication number	US-10023751-B2
Application number	US-201514885414-A
Country	US
Kind code	B2
Filing date	Oct 16, 2015
Priority date	Oct 16, 2014
Publication date	Jul 17, 2018
Grant date	Jul 17, 2018

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.

First claim

We claim:

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.

Assignees

• Univ Kingston

Inventors

• Hu Heng
• Liu Guojun
• Rabnawaz Muhammad

Classifications

• C08G18/792

  formed by oligomerisation of aliphatic and/or cycloaliphatic isocyanates or isothiocyanates · CPC title

• C09D183/10

  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 title

• C08G18/8074

  Lactams · CPC title

• C09D163/00

  Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins · CPC title

• C09D175/04 Primary

  Polyurethanes · CPC title