US-12624315-B2 - Consumer products comprising delivery particles with high core:wall ratios

US12624315B2US 12624315 B2US12624315 B2US 12624315B2US-12624315-B2

Abstract

A consumer product composition that includes a population of delivery particles, where the delivery particles include a core and a polymer wall surrounding the core, the polymer wall being derived from (meth)acrylate monomers and at least one free radical initiator, and the core including a benefit agent such as perfume, where the core and the polymer wall are present in a weight ratio of from about 95:5 to about 99.5:0.5, and where the initiator is typically used at a certain level. Related methods of making and using such consumer product compositions.

Inventors

Johan Smets
An Pintens
Fadi Selim Chakar
Linsheng Feng
Presley Genevie Neuman
Robert Stanley Bobnock
Joana Andreia Lameiras Domingues
Raul Rodrigo-Gomez

Assignees

THE PROCTER & GAMBLE COMPANY

Dates

Publication Date: 20260512
Application Date: 20220614

Claims (18)

1 . A consumer product composition comprising: a population of delivery particles, wherein the delivery particles comprise a core and a polymer wall surrounding the core, wherein the polymer wall comprises a (meth)acrylate polymer derived, at least in part, from wall monomers and at least one free radical initiator, wherein the wall monomers comprise at least 50%, by weight of the wall monomers, of (meth)acrylate monomers, wherein the at least one free radical initiator is present at a level of from 20% to 50%, by weight of the polymer wall, wherein the core comprises a benefit agent, wherein the core and the polymer wall are present in a weight ratio of from 96:4 to 99:1; and a consumer product adjunct material.
2 . The consumer product composition according to claim 1 , wherein the wall monomers comprise at least 60%, by weight of the wall monomers, of (meth)acrylate monomers.
3 . The consumer product composition according to claim 1 , wherein the (meth)acrylate monomers are multifunctional (meth)acrylate monomers, having at least three radical polymerizable functional groups, with the proviso that at least one of the radical polymerizable groups is acrylate or methacrylate.
4 . The consumer product composition according to claim 1 , wherein the at least one free radical initiator comprises a first free radical initiator and a second free radical initiator.
5 . The consumer product composition according to claim 4 , wherein the first free radical initiator and the second free radical initiator are present in a weight ratio of from about 5:1 to about 1:5.
6 . The consumer product composition according to claim 1 , wherein the at least one free radical initiator comprises a comprises a water-soluble or water-dispersible free radical initiator.
7 . The consumer product composition according to claim 1 , wherein the at least one free radical initiator comprises a material selected from the group consisting of peroxy initiators, azo initiators, and combinations thereof.
8 . The consumer product composition according claim 7 , wherein the at least one free radical initiator comprises a material selected from the group consisting of: peroxide; dialkyl peroxide; alkylperoxide; peroxyester; peroxycarbonate; peroxyketone; peroxydicarbonate; 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,l′-azobis (cyanocyclohexane); benzoyl peroxide; decanoyl peroxide; lauroyl peroxide; di(n-propyl) peroxydicarbonate; di(sec-butyl) peroxydicarbonate; di(2-ethylhexyl) peroxydicarbonate; 1,1-dimethyl-3-hydroxybutyl peroxyneodecanoate; a-cumyl peroxyneoheptanoate; t-amyl peroxyneodecanoate; t-butyl peroxyneodecanoate; t-amyl peroxypivalate; t-butyl peroxypivalate; 2,5-dimethyl 2,5-di(2-ethylhexanoyl peroxy) hexane; t-amyl peroxy-2-ethyl-hexanoate; t-butyl peroxy-2-ethylhexanoate; t-butyl peroxyacetate; di-t-amyl peroxyacetate; t-butyl peroxide; di-t-amyl peroxide; 2,5-dimethyl-2,5-di-(t-butylperoxy) hexyne-3; cumene hydroperoxide; 1,1-di-(t-butylperoxy)-3,3,5-trimethyl-cyclohexane; 1,1-di-(t-butylperoxy)-cyclohexane; 1,1-di-(t-amylperoxy)-cyclohexane; ethyl-3,3-di-(t-butylperoxy)-butyrate; t-amyl perbenzoate; t-butyl perbenzoate; ethyl 3,3-di-(t-amylperoxy)-butyrate; and combinations thereof.
9 . The consumer product composition according to claim 1 , wherein the at least one free radical initiator is present at a level of from 20% to 35%, by weight of the polymer wall.
10 . The consumer product composition according to claim 1 , wherein the core and the polymer wall are present in a weight ratio of from 97:3 to 99:1.
11 . The consumer product composition according to claim 1 , wherein the benefit agent comprises an aldehyde-comprising benefit agent, a ketone-comprising benefit agent, or a combination thereof.
12 . The consumer product composition according to claim 1 , wherein the benefit agent comprises fragrance.
13 . The consumer product composition according to claim 1 , wherein the core comprises a partitioning modifier.
14 . The consumer product composition according to claim 1 , wherein the polymer wall of the delivery particles further comprise a polymeric emulsifier entrapped in the polymer wall.
15 . The consumer product composition according to claim 1 , wherein the delivery particles are characterized by a volume-weighted median particle size from about 10 to about 100 microns.
16 . The consumer product composition according to claim 1 , wherein the consumer product adjunct material is selected from the group consisting 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, and mixtures thereof.
17 . The consumer product composition according to claim 1 , wherein the composition is a fabric care composition, a hard surface cleaner composition, a dish care composition, a hair care composition, a body cleansing composition, or a mixture thereof.
18 . The consumer product composition according to claim 1 , wherein the composition is in the form of a liquid composition, a granular composition, a hydrocolloid, a single-compartment pouch, a multi-compartment pouch, a dissolvable sheet, a pastille or bead, a fibrous article, a tablet, a stick, a bar, a flake, a foam/mousse, a non-woven sheet, or a mixture thereof.

Description

FIELD OF THE INVENTION The present disclosure relates to consumer product compositions that include a population of delivery particles, where the delivery particles include a core and a polymer wall surrounding the core. The polymer wall may be derived from (meth)acrylate monomers and at least one free radical initiator, and the core includes a benefit agent such as perfume. The core and the polymer wall are present in a weight ratio of from about 95:5 to about 99.5:0.5, and typically the initiator is used at a certain level. The present disclosure also relates to methods of making and using such consumer product compositions. BACKGROUND OF THE INVENTION Core/shell delivery particles can be an efficient and desirable way to deliver benefit agents in a variety of consumer products. Typical delivery particles often include a polymeric wall that surrounds a core, and the core includes the benefit agent. The walls may be made from polyacrylate polymers, which can be formed from acrylate-containing monomers via free radical polymerization reactions through the use of one or more free radical initiators. Known delivery particles may have the core material and the wall material present in a weight ratio, for example, of from about 80:20 to about 90:10. For delivery efficiency reasons, it may be advantageous to use delivery particles with relatively high loading capacities. Such particles can in theory be achieved by simply increasing the core:wall weight ratio, but in practice the resulting particles often do not perform very well. For example, as a result of having relatively reduced wall material present, the particles tend to have high rates of leakage. Further, such particles may be relatively brittle and may prematurely rupture, resulting in the release of the benefit agent at inopportune times. Additionally, it has been found that these problems are particularly notable in delivery particles with polyacrylate walls and high core:wall weight ratios when the benefit agent in the core contains aldehyde or ketone moieties. Curiously, leakage and/or brittleness tend not to be as problematic when similar particles are made with lower core:wall weight ratios, such as about 90:10, despite both capsules being made with the same polymeric wall material. There is a need for consumer products comprising high capacity delivery particles that provide improved performance, particularly when the core comprises one or more benefit agents that include aldehyde and/or ketone moieties. SUMMARY OF THE INVENTION The present disclosure relates to consumer product compositions that include populations of delivery particles. The delivery particles are typically characterized by a relatively high core:wall weight ratio, and a particular amount of free radical initiator that is used to make the polymer wall of the particles. For example, the present disclosure relates to a consumer product composition that includes: a population of delivery particles, where the delivery particles include a core and a polymer wall surrounding the core, where the polymer wall includes a (meth)acrylate polymer derived, at least in part, from wall monomers and at least one free radical initiator, where the wall monomers include at least 50%, by weight of the wall monomers, of (meth)acrylate monomers, where the at least one free radical initiator is present at a level of from about 15% to about 60%, by weight of the polymer wall, where the core includes a benefit agent, where the core and the polymer wall are present in a weight ratio of from about 95:5 to about 99.5:0.5; and a consumer product adjunct material. The present disclosure also relates to a consumer product that includes: a treatment adjunct, and a population of delivery particles, where the delivery particles include a core and a polymer wall surrounding the core, where the delivery particles are obtainable by a process including the steps of: providing an oil phase including a benefit agent, the oil phase preferably further including a partitioning modifier; dissolving or dispersing into the oil phase one or more oil-soluble or oil-dispersible wall monomers, where the wall monomers include at least 50%, by weight of the wall monomers, of (meth)acrylate monomers, preferably multifunctional (meth)acrylate monomers having at least three, and preferably at least four, at least five, or even at least six radical polymerizable functional groups with the proviso that at least one of the radical polymerizable groups is acrylate or methacrylate; providing at least one free radical initiator (e.g., a first free radical initiator) in the oil phase; providing a water phase including an emulsifier or surfactant, and optionally at least one other free radical initiator (e.g., a second free radical initiator); emulsifying the oil phase into the water phase under high shear agitation to form an oil-in-water emulsion including droplets of the oil phase dispersed in the water phase; reacting the dissolved or d