Silicone-based material

Patent metadata

Field	Value
Publication number	US-9896557-B2
Application number	US-201113642355-A
Country	US
Kind code	B2
Filing date	Apr 20, 2011
Priority date	Apr 28, 2010
Publication date	Feb 20, 2018
Grant date	Feb 20, 2018

Abstract

Surface-structured, cross-linked silicone-based material and method for making the same. Embodiments of silicone-based materials described herein are useful, for example, in applications of light capture, anti-reflection, light redirection, light diffusion, hydrophobic surfaces, hydrophilic surfaces, light guiding, light collimation, light concentration, Fresnel lens, retro-reflection, drag reduction, air bleed adhesives, release liner, abrasion resistance, and anti-fouling.

First claim

What is claimed is:

1. A method of making a surface-structured, cross-linked silicone-based material, the method comprising:
providing a surface-structured silicone-based material, wherein the surface-structured material is substantially free of catalysts and initiators; and
exposing the surface-structured silicone-based material to an electron-beam to cross-link the silicone-based material, the cross-linked silicone-based material comprising a silicone pressure sensitive adhesive having a non-tacky structured surface, wherein the structured surface has peak to valley measurements of less than 250 micrometers.

2. The method of claim 1 , wherein the silicone-based material is a nonfunctionalized silicone.

3. The method claim 2 , wherein the silicone-based material is a polysiloxane.

4. The method of claim 2 , further comprising:
providing a replication tool having a major surface having at least one of nano-sized or micro-sized surface structures, and
applying the silicone-based material that is substantially free of the catalysts and initiators onto at least a portion of the major surface of the replication tool to form the surface-structured silicone-based material that is substantially free of the catalysts and initiators.

5. The method of claim 2 , further comprising:
providing a substrate having a first major surface;
coating the silicone-based material that is substantially free of the catalysts and initiators on at least a portion of the major surface of the substrate; and
contacting the coated composition with a major surface of a replication tool having at least one of nano-sized or micro-sized surface structures on the major surface to form the surface-structured silicone-based material that is substantially free of the catalysts and initiators.

6. The method of claim 5 , further comprising:
applying a primer coating composition onto at least a portion of the major surface of the substrate before coating the silicone-based material that is substantially free of the catalysts and initiators thereon.

7. The method of claim 1 , wherein the silicone-based material comprises a siloxane backbone and at least one functional group.

8. The method of claim 7 , wherein all functional groups are hydroxyl groups.

9. The method of claim 1 , wherein the silicone-based material is a polysiloxane.

10. The method of claim 1 , further comprising:
providing a replication tool having a major surface having at least one of nano-sized or micro-sized surface structures, and
applying the silicone-based material that is substantially free of the catalysts and initiators onto at least a portion of the major surface of the replication tool to form the surface-structured silicone-based material that is substantially free of the catalysts and initiators.

11. The method of claim 1 , further comprising:
providing a substrate having a first major surface;
coating the silicone-based material that is substantially free of the catalysts and initiators on at least a portion of the major surface of the substrate; and
contacting the coated composition with a major surface of a replication tool having at least one of nano-sized or micro-sized surface structures on the major surface to form the surface-structured silicone-based material that is substantially free of the catalysts and initiators.

12. The method of claim 11 , further comprising:
applying a primer coating composition onto at least a portion of the major surface of the substrate before coating the silicone-based material that is substantially free of the catalysts and initiators thereon.

13. The method of claim 1 , wherein the surface-structured, cross-linked silicone-based material has two generally opposed major surfaces with a first cross link density on one major surface and a cross link density on the generally opposed major surface, wherein the first cross-link density is greater than the second cross-link density.

14. The method of claim 13 , further comprising exposing the cross-linked surface-structured silicone-based material to a second pass of the electron-beam.

15. The method of claim 1 , wherein the surface-structured, cross-linked silicone-based material comprises a base portion integrally formed with the structured surface.

16. A method of making a release liner, the method comprising:
providing a surface-structured composition comprising silicone-based material on a substrate, wherein the composition is substantially free of catalysts and initiators;
exposing the surface-structured composition to an electron-beam to cross-link the silicone-based material to provide a release liner with a surface-structured, cross-linked silicone-based material, wherein the surface-structured, cross-linked silicone-based material comprises a structured surface having peak to valley measurements of less than 250 micrometers.

17. The method of claim 16 , wherein the silicone-based material is a nonfunctionalized silicone.

18. The method of claim 17 , wherein the silicone-based material comprises a siloxane backbone and at least one functional group.

19. The method of claim 18 , wherein all functional groups are hydroxyl groups.

20. The method of claim 16 , wherein the silicone-based material a polysiloxane.

Assignees

• Pett Todd G
• Hebrink Timothy J
• Jing Naiyong
• Riddle Justin A
• Thompson David Scott
• Hartzell Andrew K
• Liu Junkang J
• 3M Innovative Properties Co

Inventors

• Pett Todd G
• Hebrink Timothy J
• Jing Naiyong
• Riddle Justin A
• Thompson David Scott
• Hartzell Andrew K
• Liu Junkang J

Classifications

• C08L83/04

  Polysiloxanes · CPC title

• B05D3/068

  using ionising radiations (gamma, X, electrons) · CPC title

• C08J7/123 Primary

  Treatment by wave energy or particle radiation (C08J7/18 takes precedence) · CPC title

• G02B1/118

  having sub-optical wavelength surface structures designed to provide an enhanced transmittance, e.g. moth-eye structures · CPC title

• C09D183/04

  Polysiloxanes · CPC title