Fluid absorbing adhesive paste

• US 20040241246A1
• Filed: 05/19/2004
• Published: 12/02/2004
• Est. Priority Date: 05/20/2003
• Status: Abandoned Application

• Current Assignee: Avery Dennison Corporation
• Original Assignee: Avery Dennison Corporation
• Inventors: Lipman, Roger D. A.
• Application Number:
  US10/849,645
• Publication Number:
  US 20040241246A1
• Time in Patent Office: Days
• US Class Current: 424/486
• CPC Class Codes: A61F 13/0213 the fluid retention member being a layer of hydrocolloid, gel forming material
• CPC Class Codes: A61F 13/0253 characterized by the adhesive material
• CPC Class Codes: A61L 15/58 Adhesives

Abstract

The present invention relates to an adhesive paste applicable to skin in paste form comprising a mixture of: (a) a continuous phase comprising at least one styrene-containing thermoplastic elastomer, at least one compatible liquid rubber, polyisobutylene, and oil; and (b) a discontinuous phase comprising at least one water soluble and/or water swellable polymer; wherein the adhesive paste contains about 25% to about 45% by weight, based on the total weight of the adhesive paste, of the oil.

Claims

1. An adhesive paste applicable to skin in paste form comprising a mixture of:

a continuous phase comprising at least one styrene-containing thermoplastic elastomer, at least one compatible liquid rubber, polyisobutylene, and at least one oil; and

a discontinuous phase comprising at least one water soluble and/or water swellable absorbent polymer;

wherein the adhesive paste contains about 25% to about 45% by weight, based on the total weight of the adhesive paste, of the oil.

2. The adhesive paste of claim 1 wherein the oil comprises mineral oil.

3. The adhesive paste of claim 1 wherein the paste comprises mineral oil in an amount within the range of about 30% to about 40% by weight, based on the total weight of the paste.

4. The adhesive paste of claim 1 wherein the weight ratio of the styrene-containing thermoplastic elastomer to liquid rubber is from about 1:

0.5 to about 1;

7.

5. The adhesive paste of claim 1 wherein discontinuous phase comprises at least one insoluble but water-absorbent and swellable polymer.

6. The adhesive paste of claim 5 wherein the water insoluble polymer comprises at least one of cross-linked sodium carboxymethyl cellulose, crystalline sodium carboxymethyl cellulose, cross-linked dextran, calcium alginate, starch-acrylonitrile graft polymer, starch sodium polyacrylate, gluten, polymers of methylvinyl ether and maleic acid and derivatives thereof.

7. The adhesive paste of claim 1 wherein the discontinuous phase comprises at least one water soluble hydrocolloid.

8. The adhesive paste of claim 7 wherein the soluble hydrocolloid comprises at least one of sodium carboxymethyl cellulose, pectin, gelatin, guar gum, locust bean gum, collagen, karaya gum, alginic acid, sodium alginates, sodium-calcium alginates, polyvinyl alcohol, polyvinyl pyrrolidone, polyethylene glycol and polypropylene glycol.

9. The adhesive paste of claim 1 wherein the solid rubber comprises at least one linear or radial A-B-A block copolymer based on styrene-butadiene, styrene isoprene or hydrogenated styrene-diene copolymers.

10. The adhesive paste of claim 9 wherein the continuous phase comprises up to 85% by weight relative to the A-B-A block copolymer(s) of one or more styrene-butadiene, styrene isoprene or hydrogenated styrene-diene AB block copolymers.

11. The adhesive paste of claim 1 wherein the liquid rubber has a molecular weight in the range of about 25,000 to about 50,000.

12. The adhesive paste of claim 1 wherein the liquid rubber has a glass transition temperature of less than −

50°

C.

13. The adhesive paste of claim 1 wherein the liquid rubber has a viscosity at 38°

C. in the range of 500 to about 10,000 poises.

14. The adhesive paste of claim 1 wherein the liquid rubber comprises at least one of synthetic liquid isoprene rubber, depolymerized natural rubber, carboxyl terminated synthetic liquid isoprene-styrene rubber, hydroxyl terminated synthetic liquid isoprene rubber, hydrogenated liquid isoprene rubber, liquid isoprene-styrene copolymer, liquid isoprene-butadiene copolymer and liquid butadiene-styrene copolymer.

15. The adhesive paste of claim 1 wherein the content of the polyisobutylene is from about 15% by weight to about 40% by weight of the total adhesive paste.

16. The adhesive paste of claim 1 wherein the polyisobutylene has a Flory viscosity average molecular weight in the range from about 25,000 to about 75,000.

17. The adhesive paste of claim 1 further comprising a polymer stabilizer.

18. The adhesive paste of claim 1 wherein the discontinuous phase comprises from about 25% by weight to about 55% by weight of the total weight of the adhesive paste.

19. The adhesive paste of claim 1 wherein the discontinuous phase comprises from about 30% by weight to about 40% by weight of the total weight of the adhesive paste.

20. The adhesive paste of claim 1 further comprising at least one low molecular weight polybutene.

21. The adhesive paste of claim 1 wherein the weight of the combination of the styrene-containing thermoplastic elastomer and the liquid rubber is the range of about 1% to about 9%, based on the total weight of the adhesive paste.

22. The adhesive paste of claim 1 wherein the paste is substantially free of a tackifier.

23. The adhesive paste of claim 1 wherein the composition is dispensable from a tube having an orifice of about 0.7 cm² and greater.

24. A wound dressing comprising an adhesive paste wherein the adhesive paste comprises:

a continuous phase comprising at least styrene-containing thermoplastic elastomer, at least one compatible liquid rubber, polyisobutylene, and mineral oil; and

a discontinuous phase comprising at least one water soluble and/or water swellable polymer;

wherein the adhesive paste contains about 25% to about 45% by weight, based on the total weight of the adhesive paste, of the mineral oil.

25. An adhesive paste applicable to skin in paste form comprising a mixture of:

a continuous phase comprising 0.1% to about 3.0% by weight of at least one styrene-containing thermoplastic elastomer, 0.5 % to about 9.0% by weight of at least one compatible liquid rubber, 15% to about 40% byweight of polyisobutylene, and 25% to about 45% by weight of mineral oil; and

a discontinuous phase comprising 25% to about 55% by weight of at least one water soluble and/or water swellable polymer.