Compositions comprising encapsulated material

• US 7,799,752 B2
• Filed: 08/12/2003
• Issued: 09/21/2010
• Est. Priority Date: 08/14/2002
• Status: Expired due to Fees

• Current Assignee: Quest International Services B.V. (Givaudan SA)
• Original Assignee: Quest International Services B.V. (Givaudan SA)
• Inventors: Ness, Jeremy Nicholas, McNamee, John
• Primary Examiner(s): Richter; Johann R
• Assistant Examiner(s): Soroush; Ali
• Application Number:
  US10/524,415
• Publication Number:
  US 20060039934A1
• Time in Patent Office: 2,597 Days
• Field of Search: 512/4
• US Class Current: 512/4
• CPC Class Codes: A61K 2800/412 Microsized, i.e. having sizes between 0.1 and 100 microns
• CPC Class Codes: A61K 8/11 Encapsulated compositions
• CPC Class Codes: A61P 31/04 Antibacterial agents
• CPC Class Codes: A61P 33/14 Ectoparasiticides, e.g. scabicides
• CPC Class Codes: A61Q 13/00 Formulations or additives for perfume preparations essential oils or perfumes per se C11B9/00
• CPC Class Codes: B01J 13/08 Simple coacervation, i.e. addition of highly hydrophilic material combined with spraying B01J13/043; combined with mechanical division B01J13/04
• CPC Class Codes: B01J 13/10 Complex coacervation, i.e. interaction of oppositely charged particles
• CPC Class Codes: B01J 13/16 Interfacial polymerisation
• CPC Class Codes: B01J 13/22 Coating

Abstract

A composition such as a water-based consumer product comprises material (e.g. perfume) encapsulated within shell capsules, each capsule comprising an encapsulating wall having an inner surface and an outer surface, with a coating on the inner surface and/or outer surface of the shell wall, the composition further comprising surfactant and/or solvent. The coating can improve the barrier properties of the shell and can enhance retention of the encapsulated materials within the shell.

Claims

1. A composition comprising a perfume encapsulated within shell capsules, each capsule being an aminoplast capsule comprising an encapsulating wall having an inner surface and an outer surface, with a coating of film-forming polymer on the inner surface of the shell wall and a coating of polyvinyl alcohol, polyvinylpyrrolidone or copolymer of polyvinylpyrrolidone on the outer surface of the shell wall;

and surfactant and/or solvent wherein the film-forming polymer coating on the inner surface of the shell wall is selected from the group consisting of;

poly(ethylene-maleic anhydride), polyamine, polyvinylpyrrolidone (PVP) polyvinylpyrrolidone-ethyl acrylate (PVP-EA), polyvinylpyrrolidone-vinyl acrylate, polyvinylpyrrolidone methylacrylate (PVP-MA), polyvinylpyrrolidone/vinyl acetate, polyvinyl acetal, polyvinyl butyral, polysiloxane, poly(propylene/maleic anhydride), maleic anhydride derivatives and polyvinyl methyl ether/maleic anhydride.

2. A composition according to claim 1, wherein the composition is a consumer product.

3. A composition according to claim 2, wherein the product is a water-based product.

4. A composition according to claim 1, wherein the encapsulated perfume comprises a first perfume which is at least partially soluble in the surfactant and/or solvent of the composition.

5. A composition according to claim 1, wherein the perfume is in the form of a perfume composition, which comprises at least 80% by weight of the total weight of the perfume composition of perfume materials having an octanol-water partition coefficient of greater than 2.5 (in logarithmic form to base 10).

6. A composition according to claim 5, wherein less than 35% by weight of the total weight of the perfume composition comprises perfume materials having an octanol-water partition coefficient of greater than 5 (in logarithmic form to base 10).

7. A composition according to claim 1, wherein the shell capsules are prepared by coacervation, interfacial polymerisation or polycondensation.

8. A composition according to claim 1, wherein the shell capsules are aminoplast capsules, based on melamine, singly or in combination with other suitable antes, crosslinking agents and secondary polymers.

9. A composition according to claim 1, wherein the aminoplast capsules comprise a mixed resin of urea/formaldehyde, maleic anhydride copolymer(s) and melamine/formaldehyde polymers.

10. A composition according to claim 1, wherein the shell capsules have a diameter in the range 1 to 500 microns.

11. A composition according to claim 1, wherein the film-forming polymer on the inner surface of the shell wall is selected from the group consisting of:

polyvinylpyrrolidone (PVP), polyvinylpyrrolidone-ethyl acrylate (PVP-EA), polyvinylpyrrolidone-vinyl acrylate, polyvinylpyrrolidone methylacrylate (PVP-MA) and polyvinylpyrrolidone/vinyl acetate.

12. A composition according to claim 1, wherein the polymer of the outer coating is selected from the group consisting of polyvinyl alcohol, polyvinyl pyrrolidone (PVP), polyvinylpyrrolidone/vinyl acetate (PVPNA), poly(vinyl pyrrolidone/dimethyaminoethyl methacrylate) (PVP/DMAEMA), and poly(vinyl pyrrolidone/methacrylamidopropyl trimethyl ammonium chloride).

13. A composition according to claim 1, wherein the coated shell capsules have a wall thickness in the range of 0.01 to 30 microns.

14. A composition according to claim 1, wherein the weight ratio of shell wall material to encapsulated perfume is in the range of 1:

10 to 3;

2.

15. A composition according to claim 1, wherein the weight ratio of solvent/surfactant:

capsules in the composition is in the range 100;

1 to 5;

1.

34. A composition according to claim 1 wherein the perfume is completely soluble in the surfactant and/or solvent;

at least 90% by weight of the total perfume content has an octanol-water partition coefficient of greater than 2.5 (in logarithmic form to base

     10) and less than 20% by weight of the total perfume content has an octanol-water partition coefficient of greater than 5 (in logarithmic form to base

     10), and the diameter of the shell capsules is in the range of 1 to 10 microns;

the coated shell capsules have a wall thickness in the range of 0.03 to 0.5 microns;

a weight ratio of shell wall material to encapsulated material in the range of 1;

10 to 1;

2 and the weight ratio of solvent/surfactant;

capsules in the composition is in the range of 100;

1 to 5;

1.

16. Capsules comprising encapsulated perfume, the perfume being encapsulated within shell capsules, each capsule being an aminoplast capsule comprising an encapsulating wall having an inner surface and an outer surface, with a coating of film-forming polymer on the inner surface of the shell wall and a coating of polyvinyl alcohol, polyvinylpyrrolidone or copolymer of polyvinylpyrrolidone on the outer surface of the shell wall wherein the film-forming polymer coating the inner surface of the shell wall is selected from the group consisting of:

poly(ethylene-maleic anhydride), polyamine, polyvinylpyrrolidone (PVP), polyvinylpyrrolidone-ethyl acrylate (PVP-EA), polyvinylpyrrolidone-vinyl acrylate, polyvinylpyrrolidone methylacrylate (PVP-MA), polyvinylpyrrolidone/vinyl acetate, polyvinyl acetal, polyvinyl butyral, polysiloxane, polypropylene/maleic anhydride), maleic anhydride derivatives and polyvinyl methyl ether/maleic anhydride.

17. Capsules according to claim 16, wherein the encapsulated perfume comprises a first perfume which is at least partially soluble, in surfactant solution and/or solvent.

18. Capsules according to claim 16, wherein the perfume is in the form of a perfume composition, which comprises at least 80% by weight of the total weight of the perfume composition of perfume materials having an octanol-water partition coefficient of greater than 2.5 (in logarithmic form to base 10).

19. Capsules according to claim 18, wherein less than 35% by weight of the total weight of the perfume composition comprises perfume materials having an octanol-water partition coefficient of greater than 5 (in logarithmic form to base 10).

20. Capsules according to claim 16, wherein the shell capsules are prepared by coacervation, interfacial polymerisation or polycondensation.

21. Capsules according to claim 16, wherein the shell capsules are aminoplast capsules, based on melamine, singly or in combination with other suitable amines, crosslinking agents and secondary polymers.

22. Capsules according to claim 16, wherein the aminoplast capsules comprise a mixed resin of urea/formaldehyde, maleic anhydride copolymer(s) and melamine/formaldehyde polymers.

23. Capsules according to claim 16, wherein the shell capsules have a diameter in the range 1 to 500 microns.

24. Capsules according to claim 16, wherein the polymer is selected from the group consisting of:

polyvinylpyrrolidone (PVP), polyvinylpyrrolidone-ethyl acrylate (PVP-EA), polyvinylpyrrolidone-vinyl acrylate, polyvinylpyrrolidone methylacrylate (PVP-MA), and polyvinylpyrrolidone/vinyl acetate.

25. Capsules according to claim 16, wherein the polymer of the coating on the outer surface is selected from the group consisting of:

polyvinyl alcohol, polyvinyl pyrrolidone (PVP), polyvinylpyrrolidone/vinyl acetate (PVPNA) polyvinyl pyrrolidone/dimethyaminoethyl methacrylate) (PVP/DMAEMA), and polyvinyl pyrrolidone/methacrylamidopropyl trimethyl ammonium chloride).

26. Capsules according to claim 16, wherein the coated shell capsules have a wail thickness in the range 0.01 to 30 microns.

27. Capsules according to claim 16, wherein the weight ratio of shell wall material to encapsulated material is in the range 1:

10 to 3;

2.

28. Capsules comprising encapsulated perfume, the perfume being encapsulated within an aminoplast capsule which comprises a coating of polyvinyl alcohol, polyvinyl pyrrolidone or a co-polymer of polyvinyl pyrrolidone on the outer surface of the shell, and a coating of a film-forming polymer on the inner surface of the shell, said coating of film-forming polymer comprising one or more polymers selected from the group consisting of:

poly(ethylene-maleic anhydride), polyamine, polyvinylpyrrolidone (PVP), polyvinylpyrrolidone-ethyl acrylate (PVP-EA), polyvinylpyrrolidone-vinyl acrylate, polyvinylpyrrolidone methylacrylate (PVP-MA), polyvinylpyrrolidone/vinyl acetate, polyvinyl acetal, polyvinyl butyral, polysiloxane, poly(propylene/maleic anhydride), maleic anhydride derivatives and polyvinyl methyl ether/maleic anhydride.

29. Capsules according to claim 28, wherein each capsule includes a coating on the outer surface of the shell comprising polyvinyl alcohol and/or poly(vinyl pyrrolidone/dimethylaminoethyl methacrylate).

30. Capsules according to claim 28, wherein the capsules have a diameter in the range 1 to 50 microns.

31. Capsules according to claim 28, wherein the perfume is in the form of a perfume composition, which comprises at least 80% by weight of the total weight of the perfume composition of perfume materials having an octanol-water partition coefficient of greater than 2.5 (in logarithmic form to base 10).

32. Capsules according to claim 31, wherein less than 35% by weight of the total weight of the perfume composition comprises perfume materials having an octanol-water partition coefficient of greater than 5 (in logarithmic form to base 10).

33. A composition comprising a perfume encapsulated within shell capsules, each capsule being an aminoplast capsule comprising an encapsulating wall having an inner surface and an outer surface, with a coating of film-forming polymer on the inner surface of the shell wall and a coating on the outer surface of the shell wall;

and surfactant and/or solvent wherein the coating on the inner surface comprises polyvinylpyrrolidone and the outer surface of the encapsulating wall is coated with polyvinyl alcohol.