Encapsulation

Patent metadata

Field	Value
Publication number	US-2018235893-A1
Application number	US-201815960654-A
Country	US
Kind code	A1
Filing date	Apr 24, 2018
Priority date	Oct 27, 2015
Publication date	Aug 23, 2018
Grant date	—

Abstract

An improved process of making a benefit agent delivery particle and consumer products incorporating such particles are disclosed. The process comprises the steps of providing a first composition of water phase 1, water phase 2 and water phase 3. Water phase 1 comprises water and an initiator; water phase 2 comprises water, a water-soluble or dispersible amine(meth)acrylate or hydroxyl(meth)acrylate and a multifunctional (meth)acrylate. Water phase 3 comprises water, and carboxyalkyl(meth)acrylate and a base or quarternary ammonium acrylate. The first two water phases are combined to prereact the hydroxy- or amine(meth)acrylate and the multifunctional (meth)acrylate to form a multifunctional hydroxyl-amine(meth)acrylate pre-polymer. The pre-polymer is combined with water phase 3; then an emulsion is formed by emulsifying under high shear agitation a second composition into said first composition; said second composition comprising an oil phase comprising an isocyanate and a benefit agent core material thereby forming a wall surrounding the benefit agent core material.

First claim

What we claim is:

1 . A consumer product comprising the combination of a consumer product ingredient and microcapsules, the microcapsules having a wall with a surface charge, the microcapsules made by a process comprising:
dispersing in one or more water phases an initiator, and a cross-linking functional monomer having one or more —OH, —NH 2 , or —NH − groups, and a charge functional monomer having one or more anionic or cationic groups which may be selected from carboxy, sulfonic acid, quaternary ammonium groups, or other charged groups; prereacting the monomers in the one or more water phases and combining with a water dispersible multifunctional (meth)acrylate monomer; further prereacting the combined monomers; forming an emulsion by emulsifying into the water phase or phases, using high shear agitation, an oil phase comprising an isocyanate and a benefit agent core material; optionally adding in addition, an amine cross-linker; further reacting the combined emulsion of prereacted monomers, water dispersible multifunctional (meth)acrylate monomer, and emulsified oil phase by heating for a time and temperature, or actinic irradiation for a time, sufficient to form a microcapsule wall surrounding the benefit agent core material.

2 . The consumer product according to claim 1 wherein the cross-linking functional monomer is an amine.

3 . The consumer product according to claim 2 wherein the amine is an alkylaminoalkyl(meth)acrylate.

4 . The consumer product according to claim 1 wherein the cross-linking functional monomer is hydroxyl functional.

5 . The consumer product according to claim 4 wherein the cross-linking functional monomer is a hydroxyl(meth)acrylate.

6 . A consumer product comprising the combination of a consumer product ingredient and microcapsules comprising an oil soluble or dispersible benefit agent core material and a shell surrounding the benefit agent core material, the shell comprising a polyurea formed from a first component of an isocyanate and a second component of an amine, the amine comprising the reaction product of an alkylaminoalkyl(meth)acrylate and a multifunctional (meth)acrylate, together with a carboxyalkyl(meth)acrylate or quarternary ammonium acrylate.

7 . The consumer product according to claim 6 wherein the amine is tertiary-butylaminoethylmethacrylate.

8 . A consumer product according to claim 6 wherein the shell of the microcapsules comprises a reaction product of an isocyanate; and a multifunctional amine (meth)acrylate.

9 . The consumer product according to claim 6 wherein the isocyanate is selected from isophorone diisocyanate, 4,4′-methylene diphenyl diisocyanate, 2,2′-methylene diphenyl diisocyanate, and 2,4′-methylene diphenyl diisocyanate.

10 . The consumer product according to claim 6 wherein the alkylaminoalkyl (meth)acrylate is selected wherein each alkyl moiety is independently from C 1 to C 8 .

11 . The consumer product according to claim 6 wherein the alkylamino (meth)acrylate is selected from tertiary-butylaminoethyl methacrylate, tertiary-butylaminopropyl methacrylate, n-butylaminoethyl methacrylate, diethylaminoethyl methacrylate, dimethylaminoethyl methacrylate, diisopropyaminoethyl methacrylate, dibutylaminoethyl methacrylate, dipropylaminoethyl methacrylate, tertiary pentylaminoethyl methacrylate, tertiary hexylaminoethyl methacrylate, tertiary-butylaminopropyl methacrylate, diethylaminopropyl methacrylate, and dimethylaminopropyl methacrylate.

12 . The consumer product according to claim 6 wherein the microcapsule has a zeta potential, measured at a pH of 7, of from +70 to −70.

13 . The consumer product according to claim 6 wherein the benefit agent core material of the microcapsule is selected from one or more of a fragrance, perfume, phase change material, biological active, antimicrobial, self-healing composition, lubricant or cooling agent.

14 . A consumer product comprising the combination of a consumer product ingredient and microcapsules comprising an oil soluble or dispersible benefit agent core material and a shell surrounding the benefit agent core material, the shell comprising a reaction product of an isocyanate; and a multifunctional amine (meth)acrylate, together with a carboxyalkyl(meth)acrylate, wherein the multifunctional amine(meth)acrylate is selected to be polar.

15 . A consumer product comprising the combination of a consumer product ingredient and microcapsules comprising an oil soluble or dispersible benefit agent core material and a shell surrounding the benefit agent core material, the shell comprising a polyurethane formed from a first component of an isocyanate and a second component of a polyol, the polyol comprising the reaction product of a hydroxy(meth)acrylate and a multifunctional (meth)acrylate, together with a carboxyalkyl(meth)acrylate or quarternary ammonium acrylate.

16 . The consumer product according to claim 15 wherein the hydroxyl(meth)acrylate is hydroxyethyl(meth)acrylate.

17 . A consumer product according to claim 15 wherein the shell of the microcapsules comprises a reaction product of an isocyanate; and a multifunctional hydroxy(meth)acrylate.

18 . The consumer product according to claim 15 wherein the isocyanate is selected from isophorone diisocyanate, 4,4′-methylene diphenyl diisocyanate, 2,2′-methylene diphenyl diisocyanate, and 2,4′-methylene diphenyl diisocyanate.

19 . The consumer product according to claim 15 wherein the alkyl moiety of the hydroxyalkyl(meth)acrylate is selected from C 1 to C 24 .

20 . The consumer product according to claim 15 wherein the hydroxy(meth)acrylate is selected from hydroxyalkyl(meth)acrylate, alkylene glycol(meth)acrylate, alkylene glycol(meth)acrylate and glycerol 1,3-diglycerate diacrylate.

21 . The consumer product according to claim 15 wherein the microcapsule has a zeta potential, measured at a pH of 7, of from +70 to −70.

22 . The consumer product according to claim 15 wherein the benefit agent core material is selected from one or more of a fragrance, perfume, phase change material, biological active, antimicrobial, self-healing composition, lubricant or cooling agent.

23 . A consumer product comprising the combination of a consumer product ingredient and microcapsules comprising an oil soluble or dispersible benefit agent core material and a shell surrounding the benefit agent core material, the shell comprising a reaction product of an isocyanate; and a multifunctional polyol (meth)acrylate, together with a carboxyalkyl(meth)acrylate, wherein the multifunctional polyol(meth)acrylate is selected to be polar.

24 . A process of making a consumer product comprising the combination of a consumer product ingredient and benefit agent delivery particles, said process for making the benefit agent delivery particles comprising providing a first composition of water phase 1, water phase 2 and water phase 3:
water phase 1 comprising water and an initiator; water phase 2 comprising water, a cross-linking functional monomer comprising a water-soluble or dispersible amine(meth)acrylate or hydroxy(meth)acrylate and a water-soluble or dispersible multifunctional (meth)acrylate; water phase 3 comprising water, carboxyalkyl(meth)acrylate and a base, or quarternary ammonium alkyl acrylate; combining water phase 1 and water phase 2; pre-reacting the amine(meth)acrylate or hydroxyl(meth)acrylate and the multifunctional (meth)acrylate of the combined

Assignees

• Procter & Gamble

Inventors

• Zhang Hanwei
• Schwantes Todd Arlin
• Hobart Katie Ann
• Williamson Diane Jean

Classifications

• C10N2050/12

  Micro capsules · CPC title

• C10N2020/055

  Particles related characteristics · CPC title

• B01J13/14

  Polymerisation; cross-linking · CPC title

• A01N25/28

  Microcapsules {or nanocapsules} · CPC title

• A61K9/5031 Primary

  obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polyethylene glycol, poly(lactide-co-glycolide) · CPC title