Delivery particle

Abstract

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.

What is claimed is: 
     
         1 . A consumer product comprising an adjunct material and, based on total composition weight, from about 0.1% to about 20% of 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, said encapsulated benefit agent optionally comprising a sufficient amount of benefit agent to provide, based on total benefit delivery composition weight from about 1% to about 85% benefit agent;   b.) less than from about 1% to about 30% shell particles; and   c.) the balance of said benefit agent delivery composition being one or processing aids and/or carriers.   
     
     
         2 . The consumer product 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 consumer product of  claim 1 , wherein said shell particles comprise an amino resin. 
     
     
         4 . The consumer product of  claim 2 , wherein said encapsulated benefit agent's perfume comprises a perfume raw material selected from the group consisting of Quadrant I, II, III perfume raw materials and mixtures thereof. 
     
     
         5 . The consumer product of  claim 1 , wherein said benefit agent delivery composition's 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. 
     
     
         6 . The consumer product of  claim 1 , wherein said benefit agent delivery composition's one or more carriers is selected from the group consisting of polar solvents; nonpolar solvents, and mixtures thereof. 
     
     
         7 . The consumer product of  claim 2 , wherein:
 a. said encapsulated benefit agent's perfume comprises a perfume raw material selected from the group consisting of Quadrant I, II, III perfume raw materials and mixtures thereof;   b. said benefit agent delivery composition's one or more processing aids are selected from the group consisting of water, aggregate inhibiting materials and mixtures thereof; and   c. said benefit agent delivery composition's 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 process comprising subjecting a benefit agent delivery composition comprising one or more encapsulated benefit agents and greater than 0.1%, shell particles to an operation selected from the group consisting of centrifugation, filtration, solvent exchange, flash evaporation, decantation, flotation separation, spray drying, reactive adsorption, reactive absorption, electrophoretic separation, and combinations thereof, for a sufficient period of time to reduce the percentage of said shell particles in said benefit agent delivery composition by at least 20%, and combining the resulting benefit agent delivery composition with one or more materials to form a consumer product. 
     
     
         9 . The process of  claim 8  comprising centrifugation, said centrifugation comprising a process selected from the group consisting of:
 a.) batch centrifugation comprising applying a centrifugal force in multiples of gravity of from about 100 to about 20,000 multiples of gravity to said benefit agent delivery composition; 
 b.) continuous centrifugation having at least one of the following process parameters
 (i) a centrifugal force in multiples of gravity of from about 100 to about 20,000 multiples of gravity to said benefit agent delivery composition; 
 (ii) an inlet fluid viscosity of from about 0.1 to about 2000 centipoise; 
 (iii) an inlet velocity of the benefit agent delivery composition of from about 0.2 to about 5 meters per second; 
 (iv) an the inlet pressure of the benefit agent delivery composition of from about 10 psig to about 120 psig; 
 (v) a pressure drop across the continuous centrifuge, from inlet to outlet, of from about 3 to about 50 psig; and 
 (vi) a solids concentration of the benefit agent delivery composition of from about 0.5 to about 90% 
 
 c.) combinations thereof. 
 
     
     
         10 . The process of  claim 8  wherein said continuous process parameters comprise:
 a.) a centrifugal force in multiples of gravity of from about 100 to about 20,000; 
 b.) an inlet fluid viscosity of from about 0.1 to about 2000 centipoise; 
 c.) an inlet velocity of the benefit agent delivery composition of from about 0.2 to about 5 meters per second; 
 d.) an the inlet pressure of the benefit agent delivery composition of from about 10 psig to about 120 psig; 
 e.) a pressure drop across the continuous centrifuge, from inlet to outlet, of from about 3 to about 50 psig; and 
 f.) a solids concentration of the benefit agent delivery composition of from about 0.5 to 90%. 
 
     
     
         11 . The process of  claim 8  comprising a filtration process selected from the group consisting of batch filtration, continuous filtration and combinations thereof, said process comprising at least one of the following process parameters:
 a.) a pressure differential across a filter media, said filter media having a median pore size is from about 10 kilo Dalton to about 30 microns; 
 b.) a pressure differential across a filter media of from about 5 psig to about 100 psig; 
 c. a permeate removal rate of from about 0.1 kg/min/ft 2  to about 50 kg/min/ft 2 . 
 
     
     
         12 . The process of  claim 11  comprising the following process parameters:
 a.) a pressure differential across a filter media, said filter media having a median pore size is from about 10 kilo Dalton to about 30 microns; 
 b.) a pressure differential across a filter media of from about 5 psig to about 100 psig; and 
 c.) a permeate removal rate of from about 0.1 kg/min/ft 2  to about 50 kg/min/ft 2 . 
 
     
     
         13 . The process of  claim 8  comprising drying said benefit agent delivery composition, said drying comprising atomizing said benefit agent delivery composition to form benefit agent delivery composition droplets having a droplet size of from about 2 microns to about 200 microns, said droplets being atomized in an atomization unit having at least one inlet and one outlet, at least one of said inlets having an inlet air temperature of from about 100° C. to about 280° C., at least one of said outlets having an outlet air temperature of from about 50° C. to about 130° C. 
     
     
         14 . The process of  claim 8  comprising adsorption and/or absorption comprising contacting the benefit agent delivery composition with a adsorption and/or absorption media for from about 5 minutes to about 500 minutes; at a benefit agent delivery composition temperature of from about 20° C. to about 110° C., and then separating said adsorption and/or absorption media and said benefit agent delivery. 
     
     
         15 . The process of  claim 8  comprising flotation and/or decantation wherein the benefit agent delivery composition is permitted to separate into two or more benefit agent delivery composition components, one of said components comprising the majority of said shell particles and a second component comprising the majority of said encapsulated benefit agents, said second component comprising said majority of said encapsulated benefit agent being separated from the remainder of said benefit agent delivery components. 
     
     
         16 . A consumer product made by a process comprising the process of  claim 1 . 
     
     
         17 . The consumer product of  claim 1 , wherein said consumer product adjunct is selected from the group consisting of polymers, for example cationic polymers, surfactants, builders, chelating agents, dye transfer inhibiting agents, dispersants, enzymes, and enzyme stabilizers, catalytic materials, bleach activators, polymeric dispersing agents, clay soil removal/anti-redeposition agents, brighteners, suds suppressors, dyes, additional perfume and perfume delivery systems, structure elasticizing agents, fabric softeners, carriers, hydrotropes, processing aids and/or pigments and mixtures thereof. 
     
     
         18 . A consumer product according to  claim 1 , comprising a material selected from the group consisting of dyes; perfume; optical brighteners; deposition aids; and mixtures thereof. 
     
     
         19 . A consumer product comprising, based on total consumer product weight:
 a.) from about 0.1% to about 5%, encapsulated benefit agent, said benefit agent comprising an amino resin;   b.) from about 1 ppm to about 150 ppm, formaldehyde; and   c.) less than about 0.3 weight %, formaldehyde scavenger.   
     
     
         20 . A method of treating and/or cleaning a situs, said method comprising
 a.) optionally washing and/or rinsing said situs;   b.) contacting said situs with a consumer product according to  claim 1  and   c.) optionally washing and/or rinsing said situs.   
     
     
         21 . A situs treated with a consumer product according to  claim 1 .