Compositions containing cationically surface-modified microparticulate carrier for benefit agents
First Claim
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1. A coated microparticulate composition comprising a microparticulate having a particle size in the range of about 1 μ
- m to about 500 μ
m, a Type-1 Polymer, and a Type-2 Polymer;
wherein the microparticulate comprises a benefit agent comprising about 35 wt. % to about 99.5 wt. % of the coated microparticulate; and
wherein the microparticulate is coated;
first with the Type-1 Polymer, wherein the Type-1 Polymer comprises a cationic polymer with a cationic atom content of about 3 wt. % to about 20 wt. % and a weight average molecular weight of about 300,000 to about 800,000 Dalton; and
then with the Type-2 Polymer, wherein the Type-2 Polymer comprises a cationic polymer with a cationic atom content of about 0.1 wt. % to about 3 wt. % and a weight average molecular weight greater than about 1,000,000 Dalton;
wherein the weight ratio of the Type-1 Polymer to Type-2 Polymer is in the range of 3 to 7.
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Abstract
A coated microparticulate composition comprising a microparticulate; wherein the microparticulate comprises a benefit agent; and wherein the microparticulate is coated with: a Type-1 Polymer, wherein the Type-1 Polymer comprises a cationic polymer with a cationic atom content greater than about 3 wt. % and a weight average molecular weight less than about 800,000 Dalton; and a Type-2 Polymer, wherein the Type-2 Polymer comprises a cationic polymer with a cationic atom content less than about 3 wt. % and a weight average molecular weight greater than about 1,000,000 Dalton.
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Citations
34 Claims
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1. A coated microparticulate composition comprising a microparticulate having a particle size in the range of about 1 μ
- m to about 500 μ
m, a Type-1 Polymer, and a Type-2 Polymer;
wherein the microparticulate comprises a benefit agent comprising about 35 wt. % to about 99.5 wt. % of the coated microparticulate; and
wherein the microparticulate is coated;first with the Type-1 Polymer, wherein the Type-1 Polymer comprises a cationic polymer with a cationic atom content of about 3 wt. % to about 20 wt. % and a weight average molecular weight of about 300,000 to about 800,000 Dalton; and then with the Type-2 Polymer, wherein the Type-2 Polymer comprises a cationic polymer with a cationic atom content of about 0.1 wt. % to about 3 wt. % and a weight average molecular weight greater than about 1,000,000 Dalton;
wherein the weight ratio of the Type-1 Polymer to Type-2 Polymer is in the range of 3 to 7. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
- m to about 500 μ
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23. A method of making a coated microparticulate composition consisting essentially of a microparticulate coated with a Type-1 Polymer and a Type-2 Polymer, wherein the microparticulate comprises a benefit agent comprising about 35 wt. % to about 99.5 wt. % of the coated microparticulate comprising:
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admixing a sufficient amount of a Type-1 Polymer with a microparticulate to raise a ζ
-potential of an aqueous dispersion of the admixed Type-1 Polymer and microparticulate to at least 65 mV when measured at a concentration of about 0.1 wt. % microparticulate in water;and admixing a Type-2 Polymer with the microparticulate, wherein the Type-1 Polymer has a cationic nitrogen content of at least about 3 wt. % and a weight average molecular weight of less than about 800,000 Dalton, wherein the Type-2 Polymer has a cationic nitrogen content of less than about 3 wt. % and a weight average molecular weight of greater than about 1,000,000 Dalton; and
wherein the weight ratio of the Type-1 Polymer to Type-2 Polymer is in the range of 3 to 7. - View Dependent Claims (24, 25, 26, 27, 28)
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29. A microparticulate coating composition consisting essentially of a polymer mixture, wherein the polymer mixture consists of a Type-1 Polymer and a Type-2 Polymer, and wherein the polymer mixture comprises about 50 wt. to about 99 wt. % of the Type-1 Polymer and about 1 wt. % to about 50 wt. % of the Type-2 Polymer, based on the total weight of the polymers in the mixture, wherein the Type-1 Polymer has a cationic nitrogen content of at least about 3 wt. % and a weight average molecular weight of less than about 800,000 Dalton, wherein the Type-2 Polymer has a cationic nitrogen content of less than about 3 wt. % and a weight average molecular weight of greater than about 1,000,000 Dalton;
- and wherein the weight ratio of the Type-1 Polymer to Type-2 Polymer is in the range of 3 to 7.
- View Dependent Claims (30, 31, 32)
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33. A method of applying a benefit agent to a substrate comprising contacting the substrate with a coated microparticulate consisting essentially of a microparticulate coated with a Type-1 Polymer and a Type-2 Polymer, wherein the microparticulate comprises a benefit agent comprising about 35 wt. % to about 99.5 wt. % of the coated microparticulate, and
rinsing the substrate with water; wherein the coated microparticulate comprises a benefit agent or a carrier containing the benefit agent coated with the Type-1 Polymer and the Type-2 Polymer at a weight ratio of the Type-1 Polymer to Type-2 Polymer in the range of 3 to 7, wherein the Type-1 Polymer has a cationic nitrogen content of at least about 3 wt. % and has a weight average molecular weight of less than about 800,000 Dalton, and the Type-2 Polymer has a cationic nitrogen content in a range of about 0.1 wt. % to about 3 wt. % and having a weight average molecular weight of at least about 1,000,000 Dalton, and wherein the coated microparticulate has an increased deposition and an increased retention on the substrate as compared to a coated microparticulate having the same weight percentage microparticulate selected from the group consisting of a first microparticulate consisting essentially of a microparticulate coated with only a Type-1 Polymer;
a second microparticulate consisting essentially of a microparticulate coated with only a Type-2 Polymer.- View Dependent Claims (34)
Specification