Mouldable hydrocolloid adhesive compositions

• US 7,335,416 B2
• Filed: 04/17/2002
• Issued: 02/26/2008
• Est. Priority Date: 04/26/2001
• Status: Expired due to Term

• Current Assignee: Avery Dennison Corporation
• Original Assignee: Avery Dennison Corporation
• Inventors: Lipman, Roger D. A.
• Primary Examiner(s): ZEMEL, IRINA SOPJIA
• Application Number:
  US10/473,959
• Publication Number:
  US 20040109885A1
• Time in Patent Office: 2,141 Days
• Field of Search: 428/343, 524/35, 524/37, 524/71, 524/274, 523/111, 523/118
• US Class Current: 428/343
• CPC Class Codes: A61L 24/0031 Hydrogels or hydrocolloids
• CPC Class Codes: A61L 24/0094 containing macromolecular fillers
• CPC Class Codes: A61L 24/043 Mixtures of macromolecular materials
• CPC Class Codes: A61L 2400/14 Adhesives for ostomy devices
• CPC Class Codes: C08L 2205/02 containing two or more polymers of the same C08L -group
• CPC Class Codes: C08L 23/20 having four to nine carbon atoms
• CPC Class Codes: C08L 2666/24 Graft or block copolymers according to groups C08L51/00, C08L53/00 or C08L55/02; Derivatives thereof
• CPC Class Codes: C08L 53/00 Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
• CPC Class Codes: C09J 123/22 Copolymers of isobutene; Butyl rubber ; Homo- or copolymers of other iso-olefines
• CPC Class Codes: Y10T 428/28 Web or sheet containing structurally defined element or component and having an adhesive outermost layer

Abstract

A mouldable pressure-sensitive hydrocolloid adhesive composition, particularly useful as a medical adhesive, comprising a dispersion of a discontinuous phase of one or more water-soluble and/or water swellable absorbent polymers in a continuous phase comprising a thermoplastic elastomer, a compatible liquid rubber, a polyisobutylene and a low-molecular weight polybutene.

Claims

1. A convex body-side flange of an ostomy device, having formed thereon a layer of a mouldable, pressure-sensitive, hydrocolloid adhesive composition comprising

a continuous phase of a mixture of (a) a thermoplastic elastomer, present in an amount of 1-5 wt. % of the composition, (b) a liquid rubber, wherein the weight ratio of thermoplastic elastomer to liquid rubber is 1:

0.5 to 1;

7, (c) polyisobutylene having a viscosity-average molecular weight of from 35,000-70,000, present in an amount of from 25-45 wt. % of the composition, (d) a low molecular weight liquid polybutene, present in an amount of from 5-20 wt. % of the composition; and

a discontinuous phase of one or more water-soluble and/or water swellable absorbent polymers.

2. A convex body-side flange of an ostomy device according to claim 1, wherein the liquid rubber has a molecular weight of 25,000 to 50,000.

3. A convex body-side flange of an ostomy device according to claim 1, wherein the low molecular weight polybutene has a molecular weight of 1,000 to 3,000 according to ASTM D445.

4. A convex body-side flange of an ostomy device according to claim 1, wherein the content of thermoplastic elastomer, based on the total composition, is not more than 3 wt. %.

5. A convex body-side flange of an ostomy device according to claim 4 wherein the content of thermoplastic elastomer does not exceed 2 wt. %.

6. A convex body-side flange of an ostomy device according to claim 1, wherein the content of liquid rubber does not exceed 10 wt. % of the composition.

7. A convex body-side flange of an ostomy device according to claim 1 wherein the polyisobutylene comprises from 30-40 wt. % of the composition.

8. A convex body-side flange of an ostomy device according to claim 1, wherein the low molecular weight polybutene comprises from 7-15 wt. % of the composition.

9. A convex body-side flange of an ostomy device according to claim 1, wherein the discontinuous phase comprises not more than 60 wt. % of the total composition.