# US 6,294,512 B1 · Granular compositions having improved dissolution

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- Number: US 6,294,512 B1
- Document ID: US6294512B1
- Status: Granted
- Kind: B1
- Application number: 09/582,748
- Filed: 2000-06-30
- Granted: 2001-09-25
- Earliest claimed: 2000-06-30
- Assignees: The Procter & Gamble Company
- Inventors: Paul R Mort, III; Kevin Todd Norwood
- Web page: https://patentgrep.com/patent/US6294512B1

## CPC

- C11D 17/065: {High-density particulate detergent compositions}
- C11D 1/04: Carboxylic acids or salts thereof (soap C11D9/00)
- C11D 1/12: Sulfonic acids or sulfuric acid esters; Salts thereof
- C11D 1/662: {Carbohydrates or derivatives}
- C11D 1/72: Ethers of polyoxyalkylene glycols
- C11D: DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL

## Abstract

Detergent compositions contain sticky particles with at least 45% by weight of a sticky surfactant and non-sticky particles with less than about 1% by weight of sticky surfactant. The particles are further characterized by their size ranges and bulk densities. Compositions containing potassium ions are described. Dissolution of the compositions in aqueous media is optimized.

## Claims

### Claim 1

A detergent composition comprising:
(a) from about 1% to about 50%, based on the total number of discrete particles in said composition, of substantially sticky particles containing at least about 45% by weight of said sticky particles, of a substantially sticky surfactant, wherein said sticky particles have a geometric mean particle diameter size of from about 300 microns to about 700 microns with a geometric standard deviation of less than about 1.8, and a bulk density at least about 450 g/l; and
(b) greater than about 35%, based on the total number of discrete particles in said composition, of substantially non-sticky particles having a geometric mean particle diameter size of from about 200 microns to about 500 microns with a geometric standard deviation of greater than about 1.2 and a bulk density of less than about 850 g/l; said non-sticky particles containing less than about 1% by weight of a sticky surfactant and wherein the total amount of detersive surfactant in said composition is at least about 15% by weight of said composition.

### Claim 2 (depends on 1)

The detergent composition of claim 1 wherein the bulk density of said sticky particles is at least about 550 g/l and the bulk density of said non-sticky particles is less than about 650 g/l.

### Claim 3 (depends on 1)

The detergent composition of claim 1 wherein the bulk density of said sticky particles is at least about 650 g/l and the bulk density of said non-sticky particles is less than about 500 g/l.

### Claim 4 (depends on 1)

The detergent composition of claim 1 wherein said sticky particles have a geometric mean particle diameter size of from about 350 microns to about 650 microns with a geometric standard deviation of less than about 1.7.

### Claim 5 (depends on 1)

The detergent composition of claim 1 wherein said non-sticky particles have a geometric mean particle diameter size of from about 250 microns to about 450 microns with a geometric standard deviation of greater than about 1.4.

### Claim 6 (depends on 1)

A method of laundering clothes comprising the steps of contacting said clothes with an effective amount of a detergent composition according to claim 1 in an aqueous washing solution.