# US 5,346,892 A · Absorbable dusting powder derived from reduced-protein modified starch

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 5,346,892 A
- Document ID: US5346892A
- Status: Granted
- Kind: A
- Application number: 07/862,774
- Filed: 1992-04-03
- Granted: 1994-09-13
- Earliest claimed: 1990-12-05
- Assignees: CPC International Inc.
- Inventors: Larry E. Fitt; Harry T. McNary
- Web page: https://patentgrep.com/patent/US5346892A

## CPC

- C08B 31/003: {Crosslinking of starch}
- A61K 8/732: {Starch; Amylose; Amylopectin; Derivatives thereof}
- A61L 31/042: {Polysaccharides}
- A61Q 1/12: Face or body powders for grooming, adorning or absorbing
- A61B 42/00: Surgical gloves; Finger-stalls specially adapted for surgery; Devices for handling or treatment thereof
- C08B: POLYSACCHARIDES; DERIVATIVES THEREOF (polysaccharides containing less than six saccharide radicals attached to each other by glycosidic linkages C07H; fermentation or enzyme-using processes C12P19/00; sugar industry C13; production of cellulose D21)
- A61K: PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES (devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms A61J3/00; chemical aspects of, or use of materials for deodorisation of air, for disinfection or sterilisation, or for bandages, dressings, absorbent pads or surgical articles A61L; soap compositions C11D)
- 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)
- A61Q: SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## Abstract

Absorbable dusting powders suitable for medical, consumer and industrial applications such as lubricating gloves and medical apparatus are prepared by treating starch with a hypochlorite to remove protein and oxidize some of the hydroxyl groups. The modified starch dusting powders are free flowing and are characterized by a protein content of less than about 0.15% by weight and hydroxyl groups oxidized to a level of from about 0.03 to about 0.5% by weight. Protein content can be reduced further by washing with water.

## Claims

### Claim 1

A modified starch composition comprising a protein content of less than about 0.15% by weight and from about 0.03 to about 0.5% by weight oxidized hydroxyl groups.

### Claim 2 (depends on 1)

The composition of claim 1 wherein the protein content is less than about 0.05% by weight.

### Claim 3 (depends on 1)

The composition of claim 1 having a degree of cross-linking of hydroxyl groups characterized by bound phosphorus levels of less than about 1200 ppm.

### Claim 4 (depends on 1)

The composition of claim 1 having a USP sedimentation value from about 45 to about 100 milliliters.

### Claim 5 (depends on 1)

The composition of claim 1 further comprising magnesium oxide in an amount less than about 2% by weight dry substance.

### Claim 6 (depends on 1)

A method of using the composition of claim 1 as a medical lubricant comprising applying the composition to the surface of a medical apparatus.

### Claim 7 (depends on 6)

The method of claim 6 wherein said medical apparatus is selected from the group consisting of gloves, catheters, tubing and drains.

### Claim 8 (depends on 1)

A method of using the composition of claim 1 as a lubricant for gloves comprising applying the composition to the gloves.