Solid free-flowing particulate laundry detergent composition

• US 9,957,466 B2
• Filed: 03/30/2016
• Issued: 05/01/2018
• Est. Priority Date: 03/30/2015
• Status: Active Grant

• Current Assignee: The Procter & Gamble Company
• Original Assignee: The Procter & Gamble Company
• Inventors: Tantawy, Hossam Hassan, Porter, Adam, Chieffi, Andre, Dorgan, Jill Robyn, McMeekin, Anthony, Gould, Paul Anthony
• Primary Examiner(s): Douyon, Lorna M
• Application Number:
  US15/084,513
• Publication Number:
  US 20160289597A1
• Time in Patent Office: 762 Days
• Field of Search: None
• CPC Class Codes: C11D 1/22 derived from aromatic compounds
• CPC Class Codes: C11D 1/29 Sulfates of polyoxyalkylene ethers
• CPC Class Codes: C11D 11/02 Preparation in the form of powder by spray drying
• CPC Class Codes: C11D 17/06 Powder; Flakes; Free-flowing mixtures; Sheets
• CPC Class Codes: C11D 3/046 Salts
• CPC Class Codes: C11D 3/08 Silicates
• CPC Class Codes: C11D 3/10 Carbonates ; Bicarbonates
• CPC Class Codes: C11D 3/373 containing silicones
• CPC Class Codes: C11D 3/3761 in solid compositions
• CPC Class Codes: C11D 3/378 (Co)polymerised monomers containing sulfur, e.g. sulfonate
• CPC Class Codes: C11D 3/42 Brightening agents ; Blueing agents

Abstract

A solid free-flowing particulate laundry detergent composition including: (a) from 0.1 wt % to 5 wt % polymer particle comprising: (i) from 70 wt % to 90 wt % co-polymer and (ii) from 10 wt % to 30 wt % salt; and (b) from 35 wt % to 80 wt % spray-dried particle including: (i) from 8 wt % to 24 wt % alkyl benzene sulphonate anionic detersive surfactant; (ii) from 5 w % to 18 wt % silicate salt; (iii) from 0 wt % to 10 wt % sodium carbonate; and (iv) from 0 wt % to 5 wt % carboxylate polymer.

Claims

1. A solid free-flowing particulate laundry detergent composition comprising:

(a) from about 0.1 wt % to about 5 wt % polymer particle comprising;

(i) from about 70 wt % to about 90 wt % co-polymer, wherein the co-polymer comprises;

(i.i) from about 50 to less than about 98 wt % structural units derived from about one or more monomers comprising carboxyl groups;

(i.ii) from about 1 to less than about 49 wt % structural units derived from about one or more monomers comprising sulfonate moieties; and

(i.iii) from about 1 to about 49 wt % structural units derived from about one or more types of monomers selected from ether bond-containing monomers represented by formulas (I) and (II);

2. A composition according to claim 1, wherein the composition comprises from about 1 wt % to about 30 wt % linear alkyl benzene sulphonate particle comprising:

(a) from about 30 wt % to about 50 wt % alkyl benzene sulphonate anionic detersive surfactant; and

(b) from about 50 wt % to about 70 wt % salt, wherein the salt is a sodium salt and/or a carbonate salt.

3. A composition according to claim 1, wherein the composition comprises from about 0.5 wt % to about 20 wt % ethoxylated alkyl sulphate particle comprising:

(a) from about 40 wt % to about 60 wt % partially ethoxylated alkyl sulphate anionic detersive surfactant, wherein the partially ethoxylated alkyl sulphate anionic detersive surfactant has a molar average degree of ethoxylation of from about 0.8 to about 1.2, and wherein the partially ethoxylated alkyl sulphate anionic detersive surfactant has a molar ethoxylation distribution such that;

(i) from about 40 wt % to about 50 wt % is unethoxylated, having a degree of ethoxylation of about 0;

(ii) from about 20 wt % to about 30 wt % has a degree of ethoxylation of about 1;

(iii) from about 20 wt % to about 40 wt % has a degree of ethoxylation of about 2 or greater;

(b) from about 20 wt % to about 50 wt % salt, wherein the salt is selected from sulphate salt and/or carbonate salt; and

(c) from about 10 wt % to about 30 wt % silica.

4. A composition according to claim 1, wherein the composition comprises from about 0.1 wt % to about 5 wt % hueing agent particle comprising:

(a) from about 2 wt % to about 10 wt % hueing agent, wherein the hueing agent has the following structure;

5. A composition according to claim 1, wherein the composition comprises from about 0.1 wt % to about 5 wt % silicone particle comprising:

(a) from about 10 wt % to about 20 wt % silicone; and

(b) from about 50 wt % to about 80 wt % carrier.

6. A composition according to claim 1, wherein the composition is substantially free of zeolite builder, phosphate builder and sodium carbonate.

7. A composition according to claim 1, wherein the polymer particle is a spray-dried particle.

8. A composition according to claim 1, wherein the polymer particle comprises from about 10 wt % to about 30 wt % sodium sulphate salt.

9. A composition according to claim 3, wherein the ethoxylated alkyl sulphate particle comprises from about 20 wt % to about 50 wt % sodium sulphate.

10. A composition according to claim 3, wherein the weight ratio of partially ethoxylated alkyl sulphate anionic detersive surfactant to silica present in the ethoxylated alkyl sulphate particle is in the range of from about 2:

1 to about 5;

1.

11. A composition according to claim 4, wherein the hueing agent particle comprises montmorillonite clay.