Adhesive articles for medical applications

1. An adhesive article comprising:

a siloxane-based pressure sensitive adhesive layer; and

a breathable conformable backing comprising a first surface and a second surface, wherein the siloxane-based pressure sensitive adhesive layer is disposed on the first surface of the breathable conformable backing, and wherein the second surface of the breathable conformable backing comprises a treated surface, wherein the treated surface is not a pressure sensitive adhesive and wherein the treated surface provides increased adhesion to non-siloxane-based pressure sensitive adhesives when compared to the adhesion to the same backing without the treated surface, and wherein the treated surface of the breathable conformable backing is prepared by a coating, and wherein when the surface treatment includes a single coating, the coating covers the entire second surface of the backing and is a low adhesion backsize (LAB) such that in a roll of the adhesive article where the adhesive layer contacts the treated second surface of the backing, the adhesion of the siloxane-based pressure sensitive adhesive to the treated second surface is sufficiently low that the roll may be unwound.

2. The adhesive article of claim 1 , wherein the siloxane-based pressure sensitive adhesive comprises an elastomeric siloxane polymer prepared from an amine-functional polysiloxane, a hydroxyl-functional polysiloxane, a hydride-functional polysiloxane, an alkoxysilane-functional polysiloxane, a vinyl-functional polysiloxane, an allyl-functional polysiloxane, a (meth)acrylate-functional polysiloxane, a non-functional polysiloxanes or a combination thereof.

3. The adhesive article of claim 2 , wherein elastomeric siloxane polymer comprises a urea-based siloxane copolymer, oxamide-based siloxane copolymer, amide-based siloxane copolymer, urethane-based siloxane copolymer, and mixtures thereof.

4. The adhesive article of claim 2 , wherein the elastomeric siloxane polymer comprises a polysiloxane polymer or copolymer prepared by the electron beam crosslinking of at least one nonfunctionalized siloxane material.

5. The adhesive article of claim 2 , wherein the siloxane-based pressure sensitive adhesive further comprises at least one tackifying resin.

6. The adhesive article of claim 1 , wherein the coating comprises a polyamide, a poly(meth)acrylate, a polyolefin, a natural rubber, a synthetic rubber, a polyurethane, a polyurea, a siloxane, a silane, a polyester, an epoxy, a polycarbodiimide, a phenolic, or a combination thereof.

7. The adhesive article of claim 6 , wherein the coating comprises a poly(meth)acrylate-based polymer, a urethane-based polymer, a siloxane-containing polymer or a combination thereof.

8. The adhesive article of claim 1 , wherein the breathable conformable backing comprises a paper backing, a woven or knit textile backing, a nonwoven backing, or a breathable plastic backing.

9. An adhesive construction comprising:

a first adhesive article comprising:

a siloxane-based pressure sensitive adhesive layer; and

a breathable conformable backing comprising a first surface and a second surface, wherein the siloxane-based pressure sensitive adhesive layer is coated on the first surface of the breathable conformable backing, and wherein the second surface of the breathable conformable backing comprises a treated surface, wherein the treated surface is not a pressure sensitive adhesive and wherein the treated surface provides increased adhesion to non-siloxane-based pressure sensitive adhesives when compared to the adhesion of the same backing without the treated surface, and wherein the treated surface of the breathable conformable backing is prepared by a coating, and wherein when the surface treatment includes a single coating, the coating covers the entire second surface of the backing and is a low adhesion backsize (LAB) such that in a roll of the adhesive article where the adhesive layer contacts the treated second surface of the backing, the adhesion of the siloxane-based pressure sensitive adhesive to the treated second surface is sufficiently low that the roll may be unwound; and

a second adhesive article, wherein the second article is adhered to the treated surface of the first adhesive article.

10. The adhesive construction of claim 9 , wherein the second adhesive article is releasably adhered to the treated surface of the first adhesive article such that the adhesion of the second adhesive article for the treated surface of the first adhesive article is less than the adhesion of the first adhesive article to skin.

11. The adhesive construction of claim 9 , wherein the siloxane-based pressure sensitive adhesive comprises an elastomeric siloxane polymer prepared from an amine-functional polysiloxane, a hydroxyl-functional polysiloxane, a hydride-functional polysiloxane, an alkoxysilane-functional polysiloxane, a vinyl-functional polysiloxane, an allyl-functional polysiloxane, a (meth)acrylate-functional polysiloxane, a non-functional polysiloxanes or a combination thereof.

12. The adhesive construction of claim 11 , wherein the elastomeric siloxane polymer comprises a polysiloxane polymer or copolymer prepared by the electron beam crosslinking of at least one nonfunctionalized siloxane material.

13. The adhesive construction of claim 9 , wherein the treated surface of the breathable conformable backing comprises a coating comprising a polyamide, a poly(meth)acrylate, a polyolefin, a natural rubber, a synthetic rubber, a polyurethane, a polyurea, a siloxane, a silane, a polyester, an epoxy, a polycarbodiimide, a phenolic, or a combination thereof.

14. The adhesive construction of claim 9 , wherein the second adhesive article comprises:

a backing layer; and

an adhesive layer, wherein the adhesive layer comprises a nonsiloxane-based pressure sensitive adhesive layer.

15. The adhesive construction of claim 9 , further comprising a medical article located between the first adhesive article and the second adhesive article.

16. The adhesive construction of claim 15 , wherein the medical article located between the first adhesive article and the second adhesive article comprises a cannula, tubing, a catheter, a dressing, a drape or a device for holding a medical device.

17. A method of preparing an adhesive construction comprising:

providing a first adhesive article, wherein the first adhesive article comprises:

a siloxane-based pressure sensitive adhesive layer; and

a breathable conformable backing comprising a first surface and a second surface, wherein the siloxane-based pressure sensitive adhesive layer is coated on the first surface of the breathable conformable backing, and wherein the second surface of the breathable conformable backing comprises a treated surface, wherein the treated surface is not a pressure sensitive adhesive and wherein the treated surface provides increased adhesion to non-siloxane pressure sensitive adhesives when compared to the same backing without the treated surface, and wherein the treated surface of the breathable conformable backing is prepared by a coating, and wherein when the surface treatment includes a single coating, the coating covers the entire second surface of the backing and is a low adhesion backsize (LAB) such that in a roll of the adhesive article where the adhesive layer contacts the treated second surface of the backing, the adhesion of the siloxane-based pressure sensitive adhesive to the treated second surface is sufficiently low that the roll may be unwound;

applying the first adhesive article to a skin surface;

providing a second adhesive article; and

applying the second adhesive article to the treated surface of the first adhesive article.

18. The method of claim 17 , further comprising applying a medical article to at least a portion of the treated surface of the first adhesive article prior to application of the second adhesive article to the treated surface of the first adhesive article.

19. The method of claim 18 , wherein the medical article comprises tubing, a catheter, a dressing, a drape, or a device for holding a medical device.

20. The method of claim 17 , further comprising:

removing the second adhesive article from the treated surface of the first adhesive article;

providing a third adhesive article; and

applying the third adhesive article to the treated surface of the first adhesive article.