06.09.23
US Patent No. 11,666,514 B2 (Mark William Hamersky, Jennifer Elaine Hilvert, Andreas Josef Dreher, Stephen Robert Glassmeyer, Emily Lao Hickey); The Procter & Gamble Company has patented a fibrous structure that contain fibrous elements and a plurality of perfume matrix particles. Upon addition of water, the fibrous structure forms a homogenous cream conditioner comprising a gel matrix and the perfume is released from the matrix particle.
The fibrous structure is comprised a polymeric structurant; a high melting point fatty material having a carbon chain length C12-C22 or mixtures thereof, wherein the melting point is above 25°C; and a cationic surfactant.
The perfume matrix particles are comprised of perfume and one or more water-soluble matrix materials comprised of polysaccharide, polyvinyl alcohol, polyvinyl pyrrolidone and its copolymers, polyvinyloxazolidone, polystyrene sulfonate, vinyl caprolactam, vinyl valerolactam, vinyl imidazole, polyethylene glycol, polyacrylic acid, polymethacrylic acid, polyvinyl formamide, polyvinyl amine, polyacrylamides and modified polyacrylamides, polydimethylacrylamide and modified polydimethylacrylamides, polyvinyl methyl ether and its copolymers with maleic anhydride, maltodextrin, hydroxypropylmethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, carboxymethyl cellulose, hemicellulose derivatives, hydroxymethyl cellulose, or a combination thereof;
The patent notes that the perfume matrix particles have a leakage of less than 5% according to the analysis of free perfume in perfume particles.
The fibrous structure is comprised a polymeric structurant; a high melting point fatty material having a carbon chain length C12-C22 or mixtures thereof, wherein the melting point is above 25°C; and a cationic surfactant.
The perfume matrix particles are comprised of perfume and one or more water-soluble matrix materials comprised of polysaccharide, polyvinyl alcohol, polyvinyl pyrrolidone and its copolymers, polyvinyloxazolidone, polystyrene sulfonate, vinyl caprolactam, vinyl valerolactam, vinyl imidazole, polyethylene glycol, polyacrylic acid, polymethacrylic acid, polyvinyl formamide, polyvinyl amine, polyacrylamides and modified polyacrylamides, polydimethylacrylamide and modified polydimethylacrylamides, polyvinyl methyl ether and its copolymers with maleic anhydride, maltodextrin, hydroxypropylmethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, carboxymethyl cellulose, hemicellulose derivatives, hydroxymethyl cellulose, or a combination thereof;
The patent notes that the perfume matrix particles have a leakage of less than 5% according to the analysis of free perfume in perfume particles.