Articles including nanosilica-based primers for polymer coatings and methods

• US 10,066,109 B2
• Filed: 04/20/2011
• Issued: 09/04/2018
• Est. Priority Date: 04/28/2010
• Status: Active Grant

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Pett, Todd G., Hebrink, Timothy J., Jing, Naiyong, Riddle, Justin A., Thompson, David Scott, Hartzell, Andrew K.
• Primary Examiner(s): Robinson, Elizabeth A
• Application Number:
  US13/642,341
• Publication Number:
  US 20130040126A1
• Time in Patent Office: 2,694 Days
• CPC Class Codes: C08L 83/04 Polysiloxanes
• CPC Class Codes: C08L 83/06 containing silicon bound to oxygen-containing groups C08L83/12 takes precedence
• CPC Class Codes: C08L 83/08 containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen
• CPC Class Codes: C09D 1/00 Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
• CPC Class Codes: C09D 183/04 Polysiloxanes
• CPC Class Codes: C09D 5/002 Priming paints C09D5/08 takes precedence
• CPC Class Codes: C09J 183/04 Polysiloxanes
• CPC Class Codes: G02B 3/08 with discontinuous faces, e.g. Fresnel lens diffractive Fresnel lenses G02B5/1876
• CPC Class Codes: Y10T 428/249969 Of silicon-containing material [e.g., glass, etc.]

Abstract

The present disclosure provides articles that include polymer coatings on substrates primed with a primer coating containing silica nanoparticles, and methods of coating. The polymer coating is preferably a silicone-based polymeric material.

Claims

1. A coated article comprising a substrate surface, a nanoparticle-containing primer disposed on the substrate surface, and a silicone-based material bonded to the nanoparticle-containing primer, wherein the substrate is glass, wherein the silicone-based material is part of a Fresnel lens, and wherein the nanoparticle-containing primer comprises an acid having a pKa of <

3.5 and agglomerates of silica nanoparticles, said primer providing a continuous three-dimensional porous network of acid-sintered silica nanoparticles, and the silica nanoparticles being bonded to adjacent silica nanoparticles.

2. The coated article of claim 1, wherein the silica nanoparticles have an average primary particle diameter of less than 40 nanometers.

3. The coated article of claim 1, wherein the nanoparticle-containing primer is 100 Å

to 10,000 Å

thick.

4. The coated article of claim 1, wherein the silicone-based material is substantially free of catalysts and initiators.

5. The coated article of claim 1, wherein the silicone-based material is non-tackified.

6. The coated article of claim 1, wherein the silicone-based material is a surface-structured silicone-based material.

7. A coated article comprising a substrate surface, a nanoparticle-containing primer disposed on the substrate surface, a silicone tie layer disposed on the nanoparticle-containing primer, and a silicone-based material bonded to the silicone tie layer, wherein the substrate is glass, wherein the silicone-based material is part of a Fresnel lens, wherein the tie layer is at least one of UV or thermally cured, and wherein the nanoparticle-containing primer comprises an acid having a pK_a of <

3.5 and agglomerates of silica nanoparticles, said primer providing a continuous three-dimensional porous network of acid-sintered silica nanoparticles, and the silica nanoparticles being bonded to adjacent silica nanoparticles.

8. The coated article of claim 7, wherein the silica nanoparticles have an average primary particle diameter of less than 40 nanometers and wherein the nanoparticle-containing primer is 100 Å

to 10,000 Å

thick.

9. The coated article of claim 7, wherein the silicone-based material is substantially free of catalysts and initiators.