# US 11,077,224 B2 · Ostomy device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,077,224 B2 - Document ID: US11077224B2 - Status: Granted - Kind: B2 - Application number: 15/547,810 - Filed: 2016-02-02 - Published: 2018-01-25 - Granted: 2021-08-03 - Earliest claimed: 2015-02-02 - Assignees: Coloplast A/S - Applicants: Coloplast A/S - Inventors: Esben Stroebech; Michael Hansen - Web page: https://patentgrep.com/patent/US11077224B2 ## CPC - A61L 24/043: {Mixtures of macromolecular materials} - A61F 5/443: having {adhesive seals for securing to the body, e.g. of} hydrocolloid type seals, e.g. gels, starches or karaya gums - A61F 5/448: Means for attaching bag to seal ring - A61L 24/001: {Use of materials characterised by their function or physical properties} - A61L 2400/14: Adhesives for ostomy devices - A61L: METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES (preservation of bodies or disinfecting characterised by the agents employed A01N; preserving, e.g. sterilising, food or foodstuffs A23; preparations for medical, dental or toiletry purposes A61K) - A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C) ## Abstract Disclosed is an ostomy device with an adhesive wafer for attachment to a skin surface (S) of a user and a collecting bag (8) or collecting output from a stoma. The collecting bag is connected to the adhesive wafer, and the adhesive wafer has a through-going hole (6) for accommodating the stoma (7) of the user. The adhesive wafer includes a backing layer (3), a first switchable adhesive composition (2), a second absorbent adhesive composition (1), and a release liner, and the second adhesive layer has a central portion with a first thickness and an edge portion with a second thickness, the first thickness being larger than the second thickness. ## Claims ### Claim 1 An ostomy device providing a hole adapted for placement around a stoma of a user, the ostomy device comprising: an adhesive wafer having a backing layer, a switchable adhesive layer applied to the backing layer, wherein the switchable adhesive layer is non-skin facing, and an absorbent adhesive layer applied to the switchable adhesive layer, where the backing layer defines a distal surface of the ostomy device and is adapted to receive a collecting bag for collection of output from the stoma; wherein the hole is sizable to receive a stoma and is formed through the backing layer, the absorbent adhesive layer, and the switchable adhesive layer; wherein the switchable adhesive layer is a ring-shaped annular band having a lateral extent that extends from an edge of the hole to an outermost perimeter of the ostomy device and the absorbent adhesive layer is formed around an entirety of the hole and extends from the edge of the hole to a rim that is located a radial distance away from the edge of the hole, where the radial distance is less than the outermost perimeter of the ostomy device; wherein the switchable adhesive layer covers the entirety of the surface of the absorbent adhesive layer; wherein the absorbent adhesive layer has a first thickness measured at the edge of the hole and a second thickness measured at the rim, and the first thickness is larger than the second thickness; wherein the switchable adhesive layer comprises a photoinitiator reactive to visible light; and wherein the absorbent adhesive layer includes absorbent particles distributed throughout the absorbent adhesive layer. ### Claim 2 (depends on 1) The ostomy device of claim 1, wherein the rim of the absorbent adhesive layer is bevelled to taper in a radial direction. ### Claim 3 (depends on 1) The ostomy device of claim 1, wherein the second thickness of the absorbent adhesive layer is less than 300 μm. ### Claim 4 (depends on 1) The ostomy device of claim 1, wherein the switchable adhesive layer comprises a polymer selected from the group consisting of polyacrylates, polyurethanes, and polysilicones. ### Claim 5 (depends on 1) The ostomy device of claim 1, wherein the switchable adhesive layer comprises curable molecules selected from the group consisting of acrylic acid esters or methacrylic acid esters of alcohols, glycols, pentaerythritol, trimethylpropane, glycerol, aliphatic epoxides, aromatic epoxides including bisphenol A epoxides, aliphatic urethanes, silicones, polyesters and polyethers. ### Claim 6 (depends on 1) The ostomy device of claim 1, wherein the photoinitiator is selected from the group consisting of titanocene photoinitiators; dye/co-initiator systems including thionine/triethanolamine; dye/borate salt systems; dye/peroxide systems and 1,2-diketone/co-initiator systems, including camphor-quinone/tertiary amine. ### Claim 7 (depends on 1) The ostomy device of claim 1, wherein the absorbent adhesive layer comprises monomer units selected from the group consisting of styrene, isoprene, butadiene, ethylene, and butylene. ### Claim 8 (depends on 1) The ostomy device of claim 1, wherein the absorbent adhesive layer comprises a styrene block co-polymer. ### Claim 9 (depends on 1) The ostomy device of claim 1, wherein the absorbent adhesive layer comprises a styrene block co-polymer selected from the group consisting of styrene-isoprene-styrene (SIS), styrene-butadiene-styrene (SBS), styrene-isobutylene-styrene (SIBS), and styrene-ethylene/butylene-styrene (SEBS). ### Claim 10 (depends on 1) The ostomy device of claim 1, wherein the absorbent adhesive layer comprises a polyethylene copolymer. ### Claim 11 (depends on 1) The ostomy device of claim 1, wherein the absorbent adhesive layer comprises a polyethylene copolymer selected from the group consisting of ethylene vinyl acetate, ethylene vinyl acetate carbon monoxide, ethylene butyl acetate, ethylene vinyl alcohol, ethylene butyl acrylate, ethylene butyl acrylate carbon monoxide, and combinations thereof. ### Claim 12 (depends on 1) The ostomy device of claim 1, wherein the absorbent adhesive layer comprises polyisobutylene (PIB). ### Claim 13 (depends on 1) The ostomy device of claim 1, wherein the absorbent particles are selected from the group consisting of hydrocolloids, microcolloids, salt, and super absorbent particles.