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1. (WO2008014109) SHAPE MEMORY POLYMER ARTICLES WITH A MICROSTRUCTURED SURFACE
注意: このテキストは、OCR 処理によってテキスト化されたものです。法的な用途には PDF 版をご利用ください。

What is claimed is:

1. An article, comprising:
a polymeric member including a surface having a microstructure; and
wherein the polymeric member comprises a shape memory polymer, the shape memory polymer comprising a copolymer network comprising 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 400C.

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, comprising :
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 polymeric member includes a shape memory polymer.

14. The article of claim 13, wherein the shape memory polymer comprises a copolymer network comprising 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 400C.

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, comprising:
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 polymeric member includes a shape memory polymer, the shape memory polymer comprising a copolymer network comprising the reaction product of (meth)acryloxyurea siloxane and isobornyl acrylate.

23. An article comprising a shape memory polymer having a microstructured surface and comprising a copolymer network, the copolymer network comprising 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 greater than about 400C.