Fluid Absorbent Adhesive Articles

• US 20100322996A1
• Filed: 02/13/2009
• Published: 12/23/2010
• Est. Priority Date: 02/14/2008
• Status: Active Application

• Current Assignee: Avery Dennison Corporation
• Original Assignee: Avery Dennison Corporation
• Inventors: Dhaeze, Kristine, Von Bavel, Davy, Wibaux, Anne
• Application Number:
  US12/866,750
• Publication Number:
  US 20100322996A1
• Time in Patent Office: Days
• US Class Current: 424/443
• CPC Class Codes: C08L 2205/02 containing two or more polymers of the same C08L -group
• CPC Class Codes: C08L 2666/04 Macromolecular compounds according to groups C08L7/00 - C08L49/00, or C08L55/00 - C08L57/00; Derivatives thereof
• CPC Class Codes: C09J 11/08 Macromolecular additives
• CPC Class Codes: C09J 133/02 Homopolymers or copolymers of acids; Metal or ammonium salts thereof
• CPC Class Codes: C09J 2433/00 Presence of (meth)acrylic polymer
• CPC Class Codes: C09J 7/385 Acrylic polymers
• CPC Class Codes: C09J 9/00 Adhesives characterised by their physical nature or the effects produced, e.g. glue sticks C09J7/00 takes precedence
• CPC Class Codes: Y10T 428/1452 Polymer derived only from ethylenically unsaturated monomer
• CPC Class Codes: Y10T 428/1462 Polymer derived from material having at least one acrylic or alkacrylic group or the nitrile or amide derivative thereof [e.g., acrylamide, acrylate ester, etc.]
• CPC Class Codes: Y10T 428/24967 Absolute thicknesses specified
• CPC Class Codes: Y10T 428/254 Polymeric or resinous material
• CPC Class Codes: Y10T 428/269 including synthetic resin or polymer layer or component

Abstract

A fluid absorbing pressure sensitive adhesive composition and adhesive articles including the fluid absorbing adhesive that have particular utility in the medical field, and in particular, for use with wound dressings is provided. The adhesive composition has superior fluid handling capacity, moisture vapor transmission and skin adhesion.

Claims

1. An adhesive composite comprising:

a polymeric backing layer;

a fluid absorbing adhesive layer comprising (a) 20-80% by weight of a solvent-based acrylic pressure sensitive adhesive and (b) 20-80% by weight of at least one super-absorbent polymer or hydrocolloid, wherein the thickness of the adhesive layer is about 40 μ

m to about 300 μ

m, and the overall adhesive composite has a fluid handling capacity of at least 2000 g/m²/24 hours and a moisture vapor transmission rate of at least 1100 g/m²/24 hours.

2. The adhesive composite of claim 1 wherein the overall adhesive composite has a fluid handling capacity of at least 2500 g/m²/24 hours.

3. The adhesive composite of claim 1 wherein the adhesive composite has a fluid handling capacity of at least 3500 g/m²/24 hours.

4. The adhesive composite of claim 1 wherein the thickness of the adhesive layer less than about 200 μ

m.

5. The adhesive composite of claim 1 wherein the adhesive layer further comprises a crosslinker.

6. The adhesive composite of claim 1 wherein the adhesive layer comprises a hydrocolloid and a super absorbent polymer.

7. The adhesive composite of claim 1 wherein the superabsorbent polymer comprises sodium polyacrylate.

8. The adhesive composite of claim 1 wherein the superabsorbent polymer or hydrocolloid has an average particle size of less than 400 μ

m, preferably less than 150 μ

m, more preferably less than 100 μ

m.

9. The adhesive composite of claim 1 wherein the polymeric backing is breathable.

10. The adhesive composite claim 1 wherein a static absorption of the composite is greater than about 600 g/m²/24 hours.

21. The adhesive composite of claim 1 further comprising a removable release layer on an outer surface of the adhesive layer.

22. The adhesive composite of claim 1 wherein an adhesive control agent is further included in the adhesive layer.

23. The adhesive composite of claim 22 wherein the adhesive control agent is a liquid rubber.

24. The adhesive composite of claim 1 further comprising a pharmaceutically active agent in the adhesive layer.

11. An adhesive composite comprising:

a polymeric backing layer having a first surface and a second surface;

a first fluid absorbing adhesive layer having a first surface and a second surface comprising (a) a solvent-based acrylic pressure sensitive adhesive and (b) 20-80% by weight of at least one super-absorbent polymer or hydrocolloid having an average particle size of less than 150 μ

m, wherein the thickness of the adhesive layer is about 40 μ

m to about 300 μ

m and the first surface of the first adhesive layer is adhered to the second surface of the backing layer,

a second fluid absorbing adhesive layer having a first surface and a second skin-contacting surface comprising a rubber-based pressure sensitive adhesive, wherein the thickness of the adhesive layer is at least 200 μ

m and the first surface of the second adhesive layer is adhered to the second surface of the first adhesive layer,

wherein the overall adhesive composite has a fluid handling capacity of at least 4000 g/m²/24 hours.

12. The adhesive composite of claim 11 wherein the thickness of the first adhesive layer less than about 200 μ

m.

13. The adhesive composite of claim 11 wherein the first adhesive layer further comprises a crosslinker.

14. The adhesive composite of claim 11 wherein the first adhesive layer comprises a hydrocolloid and a super absorbing polymer.

15. The adhesive composite of claim 11 wherein the superabsorbent polymer comprises sodium polyacrylate.

16. The adhesive composite of claim 11 wherein the superabsorbent polymer or hydrocolloid has an average particle size of less than 400 μ

m, preferably less than 150 μ

m, more preferably less than 100 μ

m.

17. The adhesive composite of claim 11 wherein the polymeric backing is breathable.

18. The adhesive composite of claim 11 wherein a static absorption of the composite is greater than about 600 g/m²/24 hours.

25. The adhesive composite of claim 11 further comprising a removable release layer on an outer surface of the adhesive layer.

26. The adhesive composite of claim 11 wherein an adhesive control agent is further included in the adhesive layer.

27. The adhesive composite of claim 26 wherein the adhesive control agent is a liquid rubber.

28. The adhesive composite of claim 11 further comprising a pharmaceutically active agent in the adhesive layer.

19. An adhesive composite comprising:

a polymeric backing layer,

a fluid absorbing adhesive layer comprising (a) 20-80% by weight of a solvent-based acrylic pressure sensitive adhesive and (b) 20-80% by weight of at least one super absorbent polymer having at least 10% crosslinking or a hydrocolloid and wherein the superabsorbant polymer or hydrocolloid has an average particle size of from about 1 μ

m to about 400 μ

m.

20. The adhesive composite of claim 19 wherein the thickness of the adhesive layer is about 40 μ

m to about 300 μ

m, and the overall adhesive composite has a fluid handling capacity of at least 2000 g/m²/24 hours and a moisture vapor transmission rate of at least 1100 g/m²/24 hours.

29. The adhesive composite of claim 19 further comprising a removable release layer on an outer surface of the adhesive layer.

30. The adhesive composite of claim 19 wherein an adhesive control agent is further included in the adhesive layer.

31. The adhesive composite of claim 30 wherein the adhesive control agent is a liquid rubber.

32. The adhesive composite of claim 19 further comprising a pharmaceutically active agent in the adhesive layer.