Composition comprising a surface deposition enhancing cationic polymer

• US 20060052272A1
• Filed: 09/06/2005
• Published: 03/09/2006
• Est. Priority Date: 09/06/2004
• Status: Active Grant

• Current Assignee: The Procter & Gamble Company
• Original Assignee: The Procter & Gamble Company
• Inventors: Frenzel, Stefan, Chieffi, Andre, Meli, Fabrizio, Selway, Rebecca Louise
• Granted Patent: US 7,470,654 B2
• Time in Patent Office: Days
• US Class Current: 510/504
• CPC Class Codes: C11D 17/0034 Fixed on a solid conventional detergent ingredient
• CPC Class Codes: C11D 17/0039 Coated compositions or coated components in the compositions, (micro)capsules
• CPC Class Codes: C11D 3/28 Heterocyclic compounds containing nitrogen in the ring
• CPC Class Codes: C11D 3/3776 Heterocyclic compounds, e.g. lactam
• CPC Class Codes: C11D 3/505 encapsulated or adsorbed on a carrier, e.g. zeolite or clay

Abstract

The present invention relates to a detergent auxiliary composition comprising: (i) a liquid or liquefiable active component; and (ii) a water-insoluble solid support component and (iii) a water-soluble and/or water dispersible encapsulating material; and (iv) optionally one or more adjunct components, characterised in that the composition further comprises (v) a surface deposition enhancing cationic polymer or oligomer having cationic groups such that fewer than 50% are de-activated when a 1% by weight solution of the polymer or oligomer (prepared in deionised water and then adjusted to pH 7.0 with sodium carbonate or citric acid) is stored at 25° C. for ten days (ten day storage test), wherein the surface deposition enhancing cationic polymer is adsorbed onto the water-insoluble solid support component, and wherein the water-soluble and/or water dispersible encapsulating material encapsulates the liquid or liquefiable active component, the water-insoluble solid support component and the surface deposition enhancing cationic polymer.

Claims

1. A detergent auxiliary particle comprising:

(i) a liquid or liquefiable active component;

(ii) a water-insoluble solid support component;

(iii) a water-soluble and/or water-dispersible encapsulating material; and

(iv) optionally one or more adjunct components, wherein the particle further comprises

(v) a surface deposition enhancing cationic polymer or oligomer having cationic groups such that fewer than 50% of the cationic groups are de-activated when a 1% by weight solution of the polymer or oligomer (prepared in deionised water and then adjusted to pH 7.0 with sodium carbonate or citric acid) is stored at 25°

C. for ten days (ten day storage test), wherein at least part of, the surface deposition enhancing cationic polymer or oligomer is adsorbed onto the water-insoluble solid support component, and wherein the water-soluble and/or water dispersible encapsulating material encapsulates at least part of, the liquid or liquefiable active component, the water-insoluble solid support component and the surface deposition enhancing cationic polymer.

2. A detergent auxiliary particle according to claim 1, wherein all of the surface deposition enhancing polymer or oligomer is adsorbed onto the water-insoluble solid support component.

3. A detergent auxiliary particle according to claim 1, wherein the water-soluble and/or water dispersible encapsulating material encapsulates all of the liquid or liquefiable active component, the water-insoluble solid support component and the surface deposition enhancing cationic polymer.

4. A particle according to claim 1, wherein the water-insoluble solid support component is porous.

5. A particle according to claim 1 wherein the water-insoluble solid support component is a zeolite.

6. A particle according to claim 1, wherein the water-insoluble solid support component has a negative surface charge.

7. A particle according to claim 6 wherein the solid support component comprises an oxide outer surface.

8. A particle according to claim 1, wherein the liquid or liquefiable active component is a perfume.

9. A particle according to claim 1, wherein the water-soluble and/or water dispersible encapsulating material comprises a polysaccharide.

10. A particle according to claim 9, wherein the water-soluble and/or water-dispersible encapsulating material comprises a starch, and optionally a plasticiser.

11. A particle according to claim 1, wherein the surface deposition enhancing cationic polymer or oligomer comprises at least 7 cationic groups.

12. A particle according to claim 1, wherein the cationic groups comprise quaternary nitrogen groups.

13. A particle according to claim 1, wherein the surface deposition enhancing cationic polymer or oligomer has a weight average molecular weight of from 500 to below 100 000 Da.

14. A particle according to claim 1, wherein the surface deposition enhancing cationic polymer or oligomer has an average degree of cationic substitution of from above 2% to 70%.

15. A particle according to claim 1, wherein the surface deposition enhancing cationic polymer or oligomer comprises cationic groups provided by cyclic amine groups.

17. A particle according to claim 1, wherein the zeta potential of the particle is more neutral than −

30 mV, preferably more neutral than −

20 mV.

18. A method of making a particle according to claim 1, the method comprising the steps of:

(i) contacting the water-insoluble solid support component with the liquid or liquefiable active component to form a first mixture; and

(ii) contacting the first mixture obtained in step (i) with the surface deposition enhancing cationic polymer or oligomer to form a second mixture; and

(iii) contacting the second mixture obtained in step (ii) with the water-soluble and/or water-dispersible encapsulating material to form a composition; and

(iv) optionally, drying the composition of step (iii),

wherein step (ii) occurs subsequent to step (i) and prior to steps (iii) and (iv).

19. A method according to claim 18, wherein step (ii) takes place at a pH of from 4 to 7.

20. A laundry detergent composition comprising a detergent auxiliary particle according to claim 1 and optionally one or more adjunct components.

16. A particle according to claim 16, wherein the surface deposition enhancing cationic polymer or oligomer comprises cationic groups provided by unsaturated cyclic amine groups.