Benefit agent delivery composition with a low content of shell particles
View Patent ↗The present application relates to encapsulated benefit agents, compositions comprising such encapsulated benefit agents and processes for making and using compositions comprising such encapsulated benefit agents that do not require or require a reduced amount of scavenger materials. Such encapsulated benefit agents, compositions comprising such encapsulated benefit agents are processed such that no or lower levels of scavenger materials are required.
1. A benefit agent delivery composition comprising, based on total benefit agent delivery composition weight;
a.) from about 2% to about 95% of an encapsulated benefit agent;
b.) from about 1% to about 30% polymeric shell particles, wherein the polymeric shell particles comprise formaldehyde scavenged from the benefit agent delivery composition and act as formaldehyde reservoirs to decrease a level of formaldehyde in the benefit agent delivery composition; and
c.) the balance of said benefit agent delivery composition being one or more processing aids and carriers.
2. The benefit agent delivery composition of claim 1 , wherein said encapsulated benefit agent comprises a benefit agent selected from the group consisting of perfumes; brighteners; insect repellants; silicones; waxes; flavors; vitamins; fabric softening agents; skin care agents; enzymes; anti-bacterial agents; bleaches; and mixtures thereof.
3. The benefit agent delivery composition of claim 1 , wherein said formaldehyde scavenged from the benefit agent delivery composition is generated by a reaction of amino resins.
4. The benefit agent delivery composition of claim 1 , wherein the encapsulated benefit agent comprises a perfume raw material selected from the group consisting of Quadrant I, II, III and IV perfume raw materials and mixtures thereof.
5. The benefit agent delivery composition of claim 1 , wherein said one or more processing aids are selected from the group consisting of water, aggregate inhibiting materials, soil suspending polymers, and mixtures thereof.
6. The benefit agent delivery composition of claim 1 , wherein said one or more carriers is selected from the group consisting of polar solvents, and mixtures thereof.
7. The benefit agent delivery composition of claim 6 , wherein:
a. said perfume comprises a perfume raw material selected from the group consisting of Quadrant I, II, III and IV perfume raw materials and mixtures thereof;
b. said one or more processing aids are selected from the group consisting of water, aggregate inhibiting materials such as divalent salts, soil suspending polymers and mixtures thereof; and
c. said one or more carriers is selected from the group consisting of water, ethylene glycol, propylene glycol, polyethylene glycol, glycerol, nonpolar solvents, and mixtures thereof.
8. A benefit agent delivery composition made by a process comprising the process of
separating polymeric shell particles from encapsulated benefit agents in a benefit agent delivery composition under conditions sufficient to reduce the percentage of said polymeric shell particles in said benefit agent delivery composition by at least 20%,
said separating step being selected from one or more of centrifuging, filtering, solvent exchanging, flash evaporating, decanting, flotation separating, spray drying, reactive adsorbing, reactive absorbing, and electrophoreticly separating,
wherein the benefit delivery composition comprises one or more encapsulated benefit agents in the absence of added formaldehyde scavenger materials and greater than 01%′ polymeric shell particles, said polymeric shell particles comprising a residual by-product of an encapsulation process; and wherein the polymeric shell particles act as formaldehyde reservoirs to decrease a level of formaldehyde in the benefit agent delivery composition.
9. The benefit agent delivery composition of claim 1 , wherein said encapsulated benefit agent comprises a sufficient amount of benefit agent to provide, based on total benefit delivery composition weight, from about 1% to about 85% benefit agent.
10. The benefit agent delivery composition of claim 2 , wherein the skin care agent comprises paraffins.
11. The benefit agent delivery composition of claim 3 , wherein the amino resin comprises one or both of a melamine resin and a urea resin.
12. The benefit agent delivery composition of claim 5 , wherein the aggregate inhibiting materials comprise divalent salts.
13. The benefit agent delivery composition of claim 6 , wherein the polar solvents are selected from the group consisting of water, ethylene glycol, propylene glycol, polyethylene glycol, glycerol, and mixtures thereof.
14. The benefit agent delivery composition of claim 6 wherein the nonpolar solvents are selected from the group consisting of mineral oil, perfume raw materials, silicone oils, hydrocarbon paraffin oils, and mixtures thereof.
15. The benefit agent delivery composition of claim 7 wherein the nonpolar solvents are selected from the group consisting of mineral oil, perfume raw materials, silicone oils, hydrocarbon paraffin oils, and mixtures thereof.
16. The benefit agent delivery composition of claim 7 wherein the aggregate inhibiting materials comprise divalent salts.
17. The benefit agent delivery composition of claim 1 wherein said encapsulated benefit agent comprises a sufficient amount of benefit agent to provide, based on total benefit delivery composition weight, from about 1% to about 20% benefit agent.