An improved process of making a benefit agent delivery particle and an improved microcapsule made by such process 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 p
An improved process of making a benefit agent delivery particle and an improved microcapsule made by such process 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.
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1. A microcapsule having a shell containing surface charge functional groups, the microcapsule made by a process comprising: dispersing in one or more water phases an initiator, a cross-linking functional monomer having one or more —OH, —NH2, or —NH groups, and a charge functional monomer having one
1. A microcapsule having a shell containing surface charge functional groups, the microcapsule made by a process comprising: dispersing in one or more water phases an initiator, a cross-linking functional monomer having one or more —OH, —NH2, or —NH groups, and a charge functional monomer having one or more anionic or cationic groups which are 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 shell having a surface charge, said microcapsule shell surrounding the benefit agent core material. 2. The microcapsule according to claim 1 wherein the cross-linking functional monomer is an amine. 3. The microcapsule according to claim 2 wherein the amine is an alkylaminoalkyl(meth)acrylate. 4. The microcapsule according to claim 1 wherein the cross-linking functional monomer is hydroxyl functional. 5. The microcapsule according to claim 4 wherein the cross-linking functional monomer is a hydroxyl(meth)acrylate. 6. A microcapsule having a shell with surface charge functional groups, the microcapsule 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 microcapsule according to claim 6 wherein the amine is tertiary-butylaminoethylmethacrylate. 8. A microcapsule according to claim 6 wherein the shell comprises a reaction product of an isocyanate; and a multifunctional amine (meth)acrylate. 9. The microcapsule 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 microcapsule according to claim 6 wherein the alkylaminoalkyl (meth)acrylate is selected wherein each alkyl moiety is independently from C1 to C8. 11. The microcapsule 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 microcapsule according to claim 6 wherein the microcapsule has a zeta potential, measured at a pH of 7, of from +70 to −70. 13. The microcapsule according to claim 6 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. 14. A microcapsule having a shell with surface charge functional groups, the microcapsule 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 microcapsule having a shell with surface charge functional groups, the microcapsule 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 microcapsule according to claim 15 wherein the hydroxyl(meth)acrylate is hydroxyethyl(meth)acrylate. 17. A microcapsule according to claim 15 wherein the shell comprises a reaction product of an isocyanate; and a multifunctional hydroxy(meth)acrylate. 18. The microcapsule 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 microcapsule according to claim 15 wherein the hydroxy (meth)acrylate is a hydroxyl(meth)acrylate and the alkyl moiety of the hydroxyalkyl(meth)acrylate is selected from C1 to C24. 20. The microcapsule 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 microcapsule according to claim 15 wherein the microcapsule has a zeta potential, measured at a pH of 7, of from +70 to −70. 22. The microcapsule 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 microcapsule having a shell with surface charge functional groups, the microcapsule 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 benefit agent delivery particle, said process 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 water phases to form a multifunctional amine(meth)acrylate or hydroxyl(meth)acrylate pre-polymer;combining the pre-polymer with water phase 3;further prereacting the combined pre-polymer;forming an emulsion by emulsifying under high shear agitation a second composition into said first composition; the second composition comprising an oil phase comprising an isocyanate and a benefit agent core material;optionally adding in addition, an amine cross-linker;heating in one or more steps said emulsion to form a shell material comprising the reaction product of the isocyanate and the prepolymer, the shell material surrounding the benefit agent core material. 25. The process according to claim 24 wherein the microcapsule has a zeta potential, measured at a pH of 7, of from +70 to −70. 26. The process according to claim 24 wherein the amine(meth)acrylate is an alkylaminoalkyl (meth)acrylate and wherein each alkyl moiety independently is from C1 to C8. 27. A process of making a benefit agent delivery particle, said process 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 hydroxyl(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 2;pre-reacting the amine(meth)acrylate or hydroxyl(meth)acrylate and the multifunctional (meth)acrylate of the combined water phases to form a hydroxy (meth)acrylate pre-polymer;combining the pre-polymer with water phase 3;further prereacting the combined pre-polymer;forming an emulsion by emulsifying under high shear agitation a second composition into said first composition; the second composition comprising an oil phase comprising an isocyanate and a benefit agent core material;optionally adding in addition, an amine cross-linker;heating in one or more steps said emulsion to form a shell material comprising the reaction product of the isocyanate and the prepolymer, the shell material surrounding the benefit agent core material, the shell having surface charge functional groups. 28. The process according to claim 27 wherein the microcapsule has a zeta potential, measured at a pH of 7, of from +70 to −70. 29. The process according to claim 27 wherein the amine(meth)acrylate is an alkylaminoalkyl (meth)acrylate and wherein each alkyl moiety independently is from C1 to C8. 30. The process according to claim 27 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. 31. The process according to claim 27 wherein the microcapsule has a zeta potential, measured at a pH of 7, of a higher positive value than +40 or greater negative value than −40.
Barancyk, Steven V.; Hockswender, Thomas R.; Furar, John; Martz, Jonathan T.; Senkfor, Howard, Polyurea coating comprising a polyamine/mono(meth)acrylate reaction product.
Barancyk, Steven V.; Hockswender, Thomas R.; Furar, John; Ambrose, Ronald R.; Martz, Jonathan T.; Senkfor, Howard, Polyurea coating comprising an amine/(meth)acrylate oligomeric reaction product.
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