Active agent-containing matrix particles and processes for making same
Matrix particles containing one or more matrix materials and one or more hydrophobic active agents, agglomerated particles made therefrom, fibrous structures containing such matrix particles and/or agglomerated particles, and processes for making same are provided.
1. A matrix particle comprises one or more uncross-linked matrix materials derived from a water-soluble polymer exhibiting a weight average molecular weight of at least 40,000 g/mol to about 40,000,000 g/mol, wherein the water-soluble polymer is selected from the group consisting of: polyvinyl alcohol, polysaccharides, gums, gelatin, dextrins, polyethylene glycols, gum arabic, larch, pectin, tragacanth, locust bean, guar, alginates, carrageenans, cellulose gums, karaya, polyacrylic acid, polyvinylpyrrolidone, polyacrylamide, and mixtures thereof and one or more hydrophobic active agents comprising a silicone and a perfume;
wherein the matrix particle comprises one or more pores;
wherein the silicone and perfume are present in the one or more pores;
wherein the matrix particle exhibits a perfume leakage of less than or equal to 20% according to the Analysis of Free Perfume in Perfume Matrix Particles described herein.
2. The matrix particle according to claim 1 wherein at least one of the one or more hydrophobic active agents is released from the matrix particle upon the matrix particle contacting water.
3. The matrix particle according to claim 1 wherein at least one of the one or more matrix materials is derived from a polymer selected from the group consisting of:
polyvinyl alcohol, polysaccharides, and mixtures thereof.
4. The matrix particle according to claim 1 wherein at least one of the one or more matrix materials is derived from polyvinyl alcohol.
5. The matrix particle according to claim 1 wherein the matrix particle comprises from about 10% to about 90% by weight of the one or more matrix materials.
6. The matrix particle according to claim 1 wherein the one or more hydrophobic active agents comprises silicone and at least one hydrophobic active agent selected from the group consisting of: perfumes, essential oils, oils, vitamin oils, vegetable oils, shea butter, cocoa butter, petrolatum, grapeseed oil, sunflower oil, olive oil, argan oil, Vitamin E, and mixtures thereof.
7. The matrix particle according to claim 1 wherein the matrix particle comprises two or more hydrophobic active agents.
8. The matrix particle according to claim 1 wherein the matrix particle exhibits a size of less than 500 μm as measured according to the Median Particle Size Test Method.
9. The matrix particle according to claim 1 wherein at least one of the one or more hydrophobic active agents is in the form of a droplet.
10. The matrix particle according to claim 9 wherein the droplet exhibits a droplet size of at least 0.02 μm to about 200 μm.
11. The matrix particle according to claim 1 wherein at least one of the one or more hydrophobic active agents is a hydrophobic active agent particle.
12. An agglomerated particle comprising a plurality matrix particles according to claim 1 .
13. A fibrous structure comprising a plurality of fibrous elements and one or more agglomerated particles according to claim 12 .
14. A fibrous structure comprising a plurality of fibrous elements and one or more matrix particles according to claim 1 .
15. The matrix particle according to claim 1 wherein the silicone comprises an aminosilicone.
16. The matrix particle according to claim 1 wherein at least one of the one or more matrix materials is derived from a polysaccharide.
17. The matrix particle according to claim 16 wherein the polysaccharide is selected from the group consisting of: starch, starch derivatives, carboxymethylcellulose, hydroxypropyl cellulose, hydroxyethyl cellulose, hydroxypropylmethyl cellulose, methyl cellulose, and mixtures thereof.