# US 11,027,042 B2 · Antimicrobial hydrocolloid dressing containing sequestered peroxide and preparation thereof

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- Number: US 11,027,042 B2
- Document ID: US11027042B2
- Status: Granted
- Kind: B2
- Application number: 16/693,687
- Filed: 2019-11-25
- Published: 2020-03-26
- Granted: 2021-06-08
- Earliest claimed: 2014-11-13
- Assignees: Sarasota Medical Products, Inc.
- Applicants: Sarasota Medical Products, Inc.
- Inventors: Walter F. Leise, III
- Web page: https://patentgrep.com/patent/US11027042B2

## CPC

- A61L 26/0004: {containing inorganic materials}
- A61L 15/18: containing inorganic materials
- A61L 15/58: Adhesives
- A61L 15/585: {Mixtures of macromolecular compounds}
- A61L 24/0015: {Medicaments; Biocides}
- A61L 24/0031: {Hydrogels or hydrocolloids}
- A61L 24/02: containing inorganic materials
- A61L 24/043: {Mixtures of macromolecular materials}
- A61L 26/0052: {Mixtures of macromolecular compounds}
- A61L 26/0066: {Medicaments; Biocides}
- A61L 26/008: {Hydrogels or hydrocolloids}
- A61P 31/04: Antibacterial agents
- C09J 123/22: Copolymers of isobutene; Butyl rubber {; Homo- or copolymers of other iso-olefines}
- A61L 2300/11: Peroxy compounds, peroxides, e.g. hydrogen peroxide
- A61L 2300/404: Biocides, antimicrobial agents, antiseptic agents
- 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)
- A61P: SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- C09J: ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES (preparation of glue or gelatine C09H)

## Abstract

This disclosure provides a method of preparing a hydrocolloid adhesive that includes the steps of mixing one or more components to produce a continuous phase, heating the continuous phased to a predetermined temperature between about 135° C. to 170° C., adding a stabilizer to the continuous phase, reducing a temperature of the continuous phase to a second predetermined temperature below 99° C., adding a discontinuous phase to the continuous phase at the second predetermined temperature, and mixing the components of the discontinuous phase and the continuous phase to produce a uniform mixture. Further, the hydrocolloid adhesive includes a super absorbent material and 0.05% to 2% by weight of a peroxide.

## Claims

### Claim 1

A hydrocolloid, comprising:
a super absorbent material chemically bonded either directly or indirectly to a peroxide, wherein the peroxide is stabilized within the hydrocolloid and the peroxide is in an amount of 0.05% to 2% by weight within the hydrocolloid,
wherein the peroxide is added to the hydrocolloid composition during processing at a temperature below 99° C.

### Claim 2 (depends on 1)

The hydrocolloid of claim 1, wherein the hydrocolloid is capable of absorbing liquid and forming a gel matrix.

### Claim 3 (depends on 2)

The hydrocolloid of claim 2, wherein the super absorbent material chemically bonded to the peroxide is 0.50% to 20.00% by weight of the hydrocolloid.

### Claim 4 (depends on 3)

The hydrocolloid of claim 3, wherein the hydrocolloid further comprises at least one of a water soluble polymer, a hydrocolloid gum, or a combination thereof.

### Claim 5 (depends on 3)

The hydrocolloid of claim 3, wherein the hydrocolloid further comprises a carboxymethyl cellulose.

### Claim 6 (depends on 5)

The hydrocolloid of claim 5, wherein the carboxymethyl cellulose is 17.25% to 32.75% by weight of the hydrocolloid.

### Claim 7 (depends on 5)

The hydrocolloid of claim 5, wherein the super absorbent material is a cross-linked sodium carboxymethyl cellulose, a crystalline sodium carboxymethyl cellulose, or a combination thereof.

### Claim 8 (depends on 7)

The hydrocolloid of claim 7, wherein the hydrocolloid further comprises a pressure sensitive adhesive, a thermoplastic elastomer, and a liquid rubber.

### Claim 9 (depends on 1)

The hydrocolloid of claim 1, wherein the hydrocolloid further comprises a metal salt, and wherein the chemical bond between the super absorbent material and the peroxide is an indirect bond, wherein the metal salt is an intermediate bridge between the super absorbent material and the peroxide.

### Claim 10 (depends on 9)

The hydrocolloid of claim 9, wherein the metal salt is a zinc salt.

### Claim 11

A moisture-absorbing device, comprising:
a superabsorbent material chemically bonded either directly or indirectly to a peroxide; and
a carboxymethyl cellulose,
wherein the peroxide is stabilized within the moisture-absorbing device and the peroxide is in an amount of 0.05% to 2% by weight therein,
wherein the peroxide is added to the hydrocolloid composition during processing at a temperature below 99° C.,
wherein the moisture-absorbing device is a hydrocolloid adhesive.

### Claim 12 (depends on 11)

The moisture-absorbing device of claim 11, wherein the super absorbent material chemically bonded to the peroxide is 0.50% to 20.00% by weight of the gel-forming device.

### Claim 13 (depends on 11)

The moisture-absorbing device of claim 11, wherein the moisture-absorbing device is capable of absorbing liquid and forming a gel matrix.

### Claim 14 (depends on 11)

The moisture-absorbing device of claim 11, wherein the carboxymethyl cellulose is 17.25% to 32.75% by weight of the moisture-absorbing device.

### Claim 15 (depends on 14)

The moisture-absorbing device of claim 14, wherein the super absorbent material is a cross-linked sodium carboxymethyl cellulose, a crystalline sodium carboxymethyl cellulose, or a combination thereof.

### Claim 16 (depends on 11)

The moisture-absorbing device of claim 11, wherein the moisture-absorbing device further comprises a metal salt, and wherein the chemical bond between the superabsorbent material and the peroxide is an indirect chemical bond, wherein the metal salt is an intermediate bridge between the super absorbent material and the peroxide.

### Claim 17 (depends on 16)

The moisture-absorbing device of claim 16, wherein the metal salt is a zinc salt.