Silicone absorbent adhesive layer

1. An adhesive composition comprising:

a polysiloxane adhesive,

wherein the polysiloxane adhesive constitutes at least about 40% by weight of the adhesive composition; and

one or more hydrocolloids dispersed in the polysiloxane adhesive,

wherein the one or more hydrocolloids constitute from about 5% to about 60% by weight of the adhesive composition;

wherein the polysiloxane adhesive is a one-part adhesive and at least partially crosslinked;

wherein the polysiloxane adhesive is selected from the group consisting of (i) an adhesive having a solids content of about 60%, a viscosity of about 2600 mPA·s, and which exhibits a rheology at 0.01 rad/sec at 30° C. of about 5×10 6 P, (ii) an adhesive having a solids content of about 60%, a viscosity of about 1200 mPA·s, and which exhibits a rheology at 0.01 rad/sec at 30° C. of about 5×10 6 P, and (iii) a combination of (i) and (ii); and

wherein the adhesive composition has a moisture vapor transmission rate (MVTR) of greater than 800 g/m 2 /24 hours.

2. The adhesive of claim 1 further comprising one or more absorbent fillers selected from the group consisting of guar gum, xanthan gum, karaya gum, locus gum, polyvinyl alcohol, pectin, gelatin, carboxymethyl cellulose, high molecular weight carbowax, carboxypolymethylene, maize starch, alginic acid, super absorbent polymers, and combinations thereof.

3. The adhesive of claim 2 wherein the one or more absorbent fillers constitute from about 25% to about 35% by weight of the adhesive composition.

4. The adhesive of claim 1 wherein the adhesive composition further comprises:

at least one tackifier.

5. The adhesive of claim 1 wherein the adhesive composition further comprises:

at least one plasticizer.

6. The adhesive of claim 1 wherein the adhesive composition further comprises:

at least one additive.

7. The adhesive of claim 1 wherein the adhesive composition further comprises:

at least one filler.

8. The adhesive of claim 1 wherein the adhesive composition further comprises:

at least one solvent.

9. An article comprising a layer of an adhesive composition according to claim 1 .

10. The article of claim 9 further comprising one or more absorbent fillers selected from the group consisting of guar gum, xanthan gum, karaya gum, locus gum, polyvinyl alcohol, pectin, gelatin, carboxymethyl cellulose, high molecular weight carbowax, carboxypolymethylene, maize starch, alginic acid, super absorbent polymers, and combinations thereof.

11. The article of claim 10 wherein the absorbent filler is carboxymethyl cellulose.

12. The article of claim 10 wherein the one or more absorbent fillers constitute from about 25% to about 35% by weight of the adhesive composition.

13. The article of claim 9 wherein the adhesive composition further comprises:

at least one tackifier.

14. The article of claim 9 wherein the adhesive composition further comprises:

at least one plasticizer.

15. The article of claim 9 wherein the adhesive composition further comprises:

at least one additive.

16. The article of claim 9 wherein the adhesive composition further comprises:

at least one filler.

17. The article of claim 9 wherein the adhesive composition further comprises:

at least one solvent.

18. The article of claim 9 wherein the article is a dressing.

19. The article of claim 18 wherein the dressing further comprises a substrate on which the layer of the adhesive composition is disposed.

20. The article of claim 18 wherein the dressing defines at least one window providing viewing through the window.

21. The article of claim 20 wherein the dressing further comprises a thin barrier film extending over the at least one window and which allows transmission of light therethrough.

22. The article of claim 18 wherein the dressing is a NPWT dressing.

23. A method of sealingly securing an article to a substrate, the method comprising:

providing an adhesive according to claim 1 ; and

forming a layer of the adhesive composition between the article and the substrate.

24. The method of claim 23 wherein the substrate is biological skin.

25. The method of claim 23 wherein the method is used in negative pressure wound therapy.

26. The method of claim 23 wherein the layer of the adhesive composition is from about 50 microns to about 300 microns.

27. A method for performing at least one of (i) forming a seal about a wound, and (ii) securing an article to skin, the method comprising:

identifying a wound or area of interest on a user's skin;

providing an adhesive composition according to claim 1 ; and

providing a layer of the adhesive composition either (i) about the wound, or (ii) between the article and skin.

28. The method of claim 27 wherein the layer of the adhesive composition is from about 50 microns to about 300 microns.