Method of making granular detergent compositions comprising polymers

Patent metadata

Field	Value
Publication number	US-9528081-B2
Application number	US-201414446579-A
Country	US
Kind code	B2
Filing date	Jul 30, 2014
Priority date	Jul 30, 2013
Publication date	Dec 27, 2016
Grant date	Dec 27, 2016

Abstract

A process of making a granular detergent composition comprising the steps of:
a) forming an aqueous detergent slurry; b) spray drying the aqueous detergent slurry to form a plurality of spray-dried detergent particles; c) forming an emulsion comprising a polymer; and d) adding the emulsion from step c) to at least a portion of the plurality of spray-dried detergent particles.

First claim

What is claimed is:

1. A process of making a granular detergent composition comprising the steps of:
a) forming an aqueous detergent slurry;
b) spray drying said aqueous detergent slurry to form a plurality of spray-dried detergent particles;
c) separately forming an emulsion comprising:
i. forming a first liquid, optionally comprising a surfactant;
ii. forming a second liquid comprising a polymer;
iii. passing the first and second liquids through a high shear mixer;
iv. mixing the first and second liquids to form the emulsion; and

d) adding the emulsion from step c) to at least a portion of said plurality of spray-dried detergent particles,
wherein an optical brightener is added with the polymer prior to the formation of the emulsion or an optical brightener is added to the emulsion once it is formed in step iv; and wherein said aqueous detergent slurry comprises from about 0 wt % to about 5 wt % zeolite builder and from about 0 wt % to about 5 wt % phosphate builder.

2. A process according to claim 1 , wherein the polymer is selected from the group consisting of carboxylate polymers, polyethylene glycol polymers, polyester soil release polymers, amine polymers, cellulosic polymers, dye polymers, dye transfer inhibition polymers, dye lock polymers, hexamethylenediamine derivative polymers, and any combination thereof.

3. A process according to claim 1 , wherein the polymer is an amphiphilic graft copolymer.

4. A process according to claim 3 , wherein the amphiphilic graft copolymer comprises a graft copolymer of polyethylene, polypropylene or polybutylene oxide with vinyl acetate in a weight ratio of from about 1:0.2 to about 1:10.

5. The process according to claim 1 , wherein the polymer is water-soluble.

6. The process according to claim 1 , wherein the surfactant is present in the emulsion.

7. The process according to claim 6 , wherein the surfactant is selected from an anionic, cationic, zwitterionic or non-ionic surfactant.

8. The process according to claim 1 , wherein the aqueous detergent slurry comprises a detersive surfactant.

9. The process according to claim 1 , wherein the aqueous detergent slurry comprises at least one additional detergent ingredient.

10. The process according to claim 1 , wherein the aqueous detergent slurry further comprises an alkalinity source.

11. The process according to claim 1 , wherein the emulsion is at a temperature of from about 30° C. to about 60° C. prior to it being added to the detergent particles.

12. The process according to claim 1 , wherein the emulsion is at a temperature of between about 40° C. and about 60° C. prior to being added to the spray-dried detergent particles.

Assignees

• Procter & Gamble

Inventors

• Tantawy Hossam Hassan
• Gault Sabrina Beatrice Danielle
• Patton Andrew Brian Greenaway
• Porter Adam
• Walker Stephen John
• Ahmadian Hossein

Classifications

• C11D11/02

  Preparation in the form of powder by spray drying · CPC title

• C11D17/0026

  Structured liquid compositions, e.g. liquid crystalline phases or network containing non-Newtonian phase · CPC title

• C11D3/3788 Primary

  Graft polymers · CPC title

• C11D17/0017 Primary

  Multi-phase liquid compositions · CPC title