Consumer product comprising biodegradable delivery particles

Patent metadata

Field	Value
Publication number	US-12357958-B2
Application number	US-202117529310-A
Country	US
Kind code	B2
Filing date	Nov 18, 2021
Priority date	Nov 19, 2020
Publication date	Jul 15, 2025
Grant date	Jul 15, 2025

Abstract

A consumer product comprising a biodegradable delivery particle having a benefit agent containing core and a shell.

First claim

What is claimed is:

1. A consumer product composition comprising a treatment adjunct and a population of delivery particles, wherein a delivery particle comprises a core and a wall encapsulating said core, wherein:
the core comprises a benefit agent and a partitioning modifier;
the wall is a polymer formed by a radical polymerization reaction between:
a) a water-soluble polysaccharide comprising at least one amine group;
b) at least one of a multifunctional (meth) acrylate monomer or oligomer;
c) at least one water-soluble thermal free radical initiator;
d) at least one oil soluble thermal free radical initiator;
wherein at least one of the water-soluble initiators is a persulfate and the water-soluble polysaccharide forms carbon/carbon, oxygen/carbon, and/or nitrogen/carbon bonds with the multifunctional (meth) acrylate monomer and/or oligomer, and with the proviso that the polysaccharide is not an amine ester modified starch;
wherein the polymer has a biodegradability in 60 days following OECD 301B test above 30% CO 2 ; and
wherein the delivery particle has a leakage of below 50%, as determined by the Leakage Test described in the TEST METHODS Section.

2. The consumer product composition of claim 1 , wherein the radical polymerization reaction further includes:
e) a mono-and/or di-functional monomer and/or oligomer.

3. The consumer product composition of claim 1 , wherein the partitioning modifier is at least one of isopropyl myristate, vegetable oil, modified vegetable oil, mono-, di-, and tri-esters of C 4 -C 24 fatty acids, dodecanophenone, lauryl laurate, methyl behenate, methyl laurate, methyl palmitate, methyl stearate, or mixtures thereof.

4. The consumer product composition of claim 1 , wherein the water-soluble polysaccharide comprises at least one primary amine.

5. The consumer product composition of claim 1 , wherein the water-soluble polysaccharide further comprises hydroxyl moieties.

6. The consumer product composition of claim 1 , wherein the wall further comprises a polymer comprising hydroxyl moieties.

7. The consumer product composition of claim 6 , wherein the polymer comprising hydroxyl moieties is at least one of pectin, carrageenan, cellulose, xanthan gum, tara gum, konjac gum, alginate, hyaluronic acid, amylose, lignin, diutan gum, gelatin, poly (vinyl alcohol) or mixtures thereof.

8. The consumer product composition of claim 1 , wherein the water-soluble polysaccharide is at least 2 weight percentage of the total wall.

9. The consumer product composition of claim 7 , wherein the polymer is at least 10 weight percentage of the total wall.

10. The consumer product composition of claim 1 , wherein at least one of the water-soluble polysaccharide or the polymer has a molecular weight from 30kDa to 500kDa.

11. The consumer product composition of claim 1 , wherein at least one of the multifunctional (meth) acrylate monomer or oligomer is at least one of tri-functional (meth) acrylate, tetra-functional (meth) acrylate, penta-functional (meth) acrylate, hexa-functional (meth) acrylate, hepta-functional (meth) acrylate, or mixtures thereof.

12. The consumer product composition of claim 1 , wherein at least one of the multifunctional (meth) acrylate monomer or oligomer comprises a hexafunctional aromatic urethane acrylate.

13. The consumer product composition of claim 1 , wherein at least one of the multifunctional (meth) acrylate monomer or oligomer comprises a multifunctional aliphatic urethane acrylate.

14. The consumer product composition of claim 1 , wherein at least one of the multifunctional (meth) acrylate monomer or oligomer is at least 5 weight percentage of the total wall.

15. The consumer product composition of claim 1 , wherein at least one of the mono-functional monomer, di-functional monomer, or oligomer is independently at least one of:

wherein
R 1 , R 2 , R 5 , R 6 , R 7 , R 8 , R 9 and R 10 are independently selected from the group consisting of a hydrogen (*—H) and a methyl group (*—CH 3 );
a, b, c and d are integers independently selected from 1 to 10,
R 3 and R 4 are independently selected from the group consisting of

h and i are integers independently selected from 0 to 10;
R 11 is selected from the group consisting of hydroxyl (*—OH), hydrogen (*—H), and methyl group (*-CH 3 ).

16. The consumer product composition of claim 1 , wherein the water-soluble thermal free radical initiator is at least one of ammonium persulfate, potassium persulfate, sodium persulfate or mixtures thereof.

17. The consumer product composition of claim 1 , wherein the oil soluble thermal free radical initiator is an azo-based initiator.

18. The consumer product composition of claim 17 , wherein the azo-based initiator s at least one of 2,2′-azobis (isobutylnitrile), 2,2′-azobis(2,4-dimethylpentanenitrile), 2,2′-azobis (2,4-dimethylvaleronitrile), 2,2′-azobis(2-methylpropanenitrile), 2,2′-azobis(2-methylbutyronitrile), 1,1′-azobis (cyclohexanecarbonitrile), 1,1′-azobis(cyanocyclohexane) or mixtures thereof.

19. The consumer product composition of claim 1 , wherein at least one of the water-soluble polysaccharide or the polymer is fragmented by the water-soluble initiator prior to form at least one of carbon/carbon, oxygen/carbon, or nitrogen/carbon bonds with at least one of the multifunctional (meth) acrylate monomer or oligomer.

20. The consumer product composition of claim 1 , wherein at least one of the water-soluble polysaccharide or polymer forms carbon/carbon bonds with at least one of the multifunctional (meth)acrylate monomer or oligomer.

21. The consumer product composition of claim 1 , wherein the delivery particle is prepared at a pH from 3 to 7.

22. The consumer product composition of claim 1 , wherein the wall has a biodegradability above 30% CO 2 in 60 days following OECD 301B test.

23. The consumer product composition of claim 1 , wherein the wall of the delivery particles further comprises a coating material.

24. The consumer product composition of claim 1 , wherein the treatment adjunct is at least one of surfactants, conditioning actives, deposition aids, rheology modifiers or structurants, bleach systems, stabilizers, builders, chelating agents, dye transfer inhibiting agents, dispersants, enzymes, enzyme stabilizers, catalytic metal complexes, polymeric dispersing agents, clay and soil removal/anti-redeposition agents, brighteners, suds suppressors, silicones, hueing agents, aesthetic dyes, neat perfume, additional perfume delivery systems, structure elasticizing agents, carriers, hydrotropes, processing aids, anti-agglomeration agents, coatings, formaldehyde scavengers, pigments, or mixtures thereof.

Assignees

• Procter & Gamble

Inventors

• Fernandez Prieto Susana
• Eykens Valerie Francine Hans
• Nijakowski Timothy Roy
• Del Pezzo Rita
• Smets Johan
• Feng Linsheng
• Bardsley Travis Ian
• Chakar Fadi Selim
• Bobnock Robert Stanley

Classifications

• C08L2207/53

  Core-shell polymer · CPC title

• C08L2201/06

  Biodegradable · CPC title

• C08L5/08

  Chitin; Chondroitin sulfate; Hyaluronic acid; Derivatives thereof · CPC title

• C08F2438/00

  Living radical polymerisation · CPC title

• C08F2/32

  Polymerisation in water-in-oil emulsions · CPC title