Shape memory polymer articles with a microstructured surface

• US 10,279,069 B2
• Filed: 11/15/2011
• Issued: 05/07/2019
• Est. Priority Date: 07/28/2006
• Status: Active Grant

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Mazurek, Mieczyslaw H., Galkiewicz, Robert K., Sherman, Audrey A., Starkey, James R., Winkler, Wendi J., Zhang, Haiyan, Olofson, Jeffrey M.
• Primary Examiner(s): Kahn, Rachel
• Application Number:
  US13/296,362
• Publication Number:
  US 20120058305A1
• Time in Patent Office: 2,730 Days
• Field of Search: None
• CPC Class Codes: A61L 15/24 Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives thereof A61L15/225 takes precedence
• CPC Class Codes: A61L 15/26 Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives thereof A61L15/225 takes precedence
• CPC Class Codes: A61L 24/046 obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds A61L24/043 takes precedence
• CPC Class Codes: A61L 24/06 obtained by reactions only involving carbon-to-carbon unsaturated bonds A61L24/043, A61L24/046 take precedence
• CPC Class Codes: A61L 2400/16 Materials with shape-memory or superelastic properties
• CPC Class Codes: C08F 283/00 Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
• CPC Class Codes: C08F 283/12 on to polysiloxanes
• CPC Class Codes: C08F 290/068 Polysiloxanes
• CPC Class Codes: C08F 290/148 Polysiloxanes
• CPC Class Codes: C08L 33/08 Homopolymers or copolymers of acrylic acid esters
• CPC Class Codes: C08L 83/04 Polysiloxanes
• CPC Class Codes: Y10T 428/24355 Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]

Abstract

A shape memory polymer article is disclosed. The article may include a surface having a microstructure and it may include a shape memory polymer. The shape memory polymer may include a copolymer network. The copolymer network may be formed from the reaction product of a free radically polymerizable siloxane having greater than one functional free radically polymerizable group and at least one (meth)acrylate monomer.

Claims

1. An article consisting of:

a first portion consisting of;

a polymeric member including a surface having a microstructure, wherein the microstructure is formed through the use of a microstructured molding tool; and

wherein the polymeric member consists of a shape memory polymer, the shape memory polymer consisting of a copolymer network consisting of the reaction product of a free radically polymerizable siloxane having greater than one functional free radically polymerizable group, at least one (meth)acrylate monomer, and a photoinitiator, wherein the at least one (meth)acrylate monomer, when homopolymerized, forms a homopolymer having a glass transition temperature, a melting temperature, or both greater than about 40°

C.; and

a second portion consisting of a metal, a metal alloy, a ceramic, or a fluid.

2. The article of claim 1, wherein the free radically polymerizable siloxane has a number average molecular weight of about 1,000-200,000 grams per mole.

3. The article of claim 1, wherein the free radically polymerizable siloxane includes a telechelic siloxane.

4. The article of claim 2, wherein the telechelic siloxane includes (meth)acryloxyurea siloxane.

5. The article of claim 2, wherein the telechelic siloxane includes acrylamidoamido siloxane.

6. The article of claim 2, wherein the telechelic siloxane includes methacrylamidoamido siloxane.

7. The article of claim 2, wherein the telechelic siloxane includes methylstyrylurea siloxane.

8. The article of claim 1, wherein the (meth)acrylate monomer includes isobornyl acrylate.

9. The article of claim 1, wherein the copolymer network includes about 10-70 weight-percent of the free radically polymerizable siloxane.

10. The article of claim 1, wherein the copolymer network includes about 10-60 weight-percent of the free radically polymerizable siloxane.

11. The article of claim 1, wherein the copolymer network includes about 20-60 weight-percent of the free radically polymerizable siloxane.

12. The article of claim 1, wherein the polymeric member includes a secondary surface having a microstructure.

13. An article, consisting of:

a polymeric member including a microstructured surface, wherein the microstructured surface includes a surface feature that is not visible to an unaided eye, and wherein the microstructure is formed through the use of a microstructured molding tool; and

wherein the polymeric member consists of a shape memory polymer, wherein the shape memory polymer consists of a copolymer network consisting of the reaction product of a free radically polymerizable siloxane having greater than one functional free radically polymerizable group, at least one (meth)acrylate monomer, and a photoinitiator; and

a metal, a metal alloy, a ceramic, or a fluid.

14. The article of claim 13, wherein the shape memory polymer consists of a copolymer network consisting of the reaction product of a free radically polymerizable siloxane having greater than one functional free radically polymerizable group and at least one (meth)acrylate monomer, wherein the at least one (meth)acrylate monomer, when homopolymerized, forms a homopolymer having a glass transition temperature, a melting temperature, or both greater than about 40°

C.

15. The article of claim 14, wherein the free radically polymerizable siloxane has a number average molecular weight of about 1,000-200,000 grams per mole.

16. The article of claim 14, wherein the (meth)acrylate monomer includes isobornyl acrylate.

17. The article of claim 14, wherein the free radically polymerizable siloxane includes a telechelic siloxane.

18. The article of claim 17, wherein the telechelic siloxane includes (meth)acryloxyurea siloxane, acrylamidoamido siloxane, methacrylamidoamido siloxane, or methylstyrylurea siloxane.

19. The article of claim 13, wherein the surface feature includes a plurality of depressions.

20. The article of claim 13, wherein the surface feature includes a plurality of projections.

21. The article of claim 13, wherein the polymeric member includes a secondary surface having a microstructure.

22. An article, consisting of:

a polymeric member including a microstructured surface, wherein the microstructured surface includes a surface feature that is not visible to an unaided eye, and wherein the microstructure is formed through the use of a microstructured molding tool; and

wherein the polymeric member consists of a shape memory polymer, the shape memory polymer consisting of a copolymer network consisting of the reaction product of (meth)acryloxyurea siloxane, isobornyl acrylate, and a photoinitiator; and

a metal, a metal alloy, a ceramic, or a fluid.