Shape memory polymer articles with a microstructured surface

Patent metadata

Field	Value
Publication number	US-10279069-B2
Application number	US-201113296362-A
Country	US
Kind code	B2
Filing date	Nov 15, 2011
Priority date	Jul 28, 2006
Publication date	May 7, 2019
Grant date	May 7, 2019

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.

First claim

What is claimed is:

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.

Assignees

• Mazurek Mieczyslaw H
• Galkiewicz Robert K
• Sherman Audrey A
• Starkey James R
• Winkler Wendi J
• Zhang Haiyan
• Olofson Jeffrey M
• 3M Innovative Properties Co

Inventors

• Mazurek Mieczyslaw H
• Galkiewicz Robert K
• Sherman Audrey A
• Starkey James R
• Winkler Wendi J
• Zhang Haiyan
• Olofson Jeffrey M

Classifications

• A61L15/26 Primary

  Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives thereof {(A61L15/225 takes precedence)} · CPC title

• C08F283/12

  on to polysiloxanes · CPC title

• C08F290/148

  Polysiloxanes · CPC title

• C08F290/068

  Polysiloxanes · CPC title

• C08L33/08

  Homopolymers or copolymers of acrylic acid esters · CPC title