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US-12624312-B2 - Fabric care composition with delivery particles

US12624312B2US 12624312 B2US12624312 B2US 12624312B2US-12624312-B2

Abstract

A fabric care composition that includes quaternary ammonium ester material and a population of delivery particles, where the quaternary ammonium ester material includes triester quaternary ammonium material (“triester quats”), and where the shells of the delivery particles include a polymeric material that is the reaction product of a polyisocyanate and chitosan, preferably hydrolyzed chitosan. A method of treating a fabric with the composition.

Inventors

  • Susana FERNANDEZ-PRIETO
  • Cedric Marc Tahon
  • Johan Smets
  • Linsheng Feng

Assignees

  • THE PROCTER & GAMBLE COMPANY

Dates

Publication Date
20260512
Application Date
20220811

Claims (18)

  1. 1 . A fabric care composition comprising: quaternary ammonium ester material, wherein the quaternary ammonium ester material comprises triester quaternary ammonium material (“triester quats”), wherein the triester quaternary ammonium material is derived, in part, from C13-C22 fatty acids; and a population of delivery particles, wherein the delivery particles comprise a core and shell surrounding the core, wherein the core comprises a benefit agent, wherein the shell comprises a polymeric material that is the reaction product of a polyisocyanate and hydrolyzed chitosan, wherein the shell comprises the hydrolyzed chitosan at a level of at least 21 wt %, by weight of the shell; and wherein the hydrolyzed chitosan is characterized by one or more of the following: a) a degree of deacetylization of at least 85%, and b) a weight average molecular weight of 95 kDa or less.
  2. 2 . The fabric care composition according to claim 1 , wherein the quaternary ammonium ester material comprises compounds according to Formula (I): {R 2 (4-m) —N+—[X—Y—R 1 ] m }A − Formula (I) wherein: m is 1, 2 or 3, with provisos that in a given molecule, the value of each m is identical, and for at least some of the compounds according to Formula (I), m is 3; each R 1 , which optionally comprises from 13 to 22 carbon atoms, is independently a linear hydrocarbyl or branched hydrocarbyl group; each R 2 is selected from methyl or hydroxyethyl; each X is independently —(CH 2 ) n —, —CH 2 —CH(CH 3 )— or —CH(CH 3 )—CH 2 —, where each n is independently 1, 2, 3 or 4; each Y is independently —O—(O)C— or —C(O)—O—; and A− is independently selected from the group consisting of chloride, bromide, methyl sulfate, ethyl sulfate, sulfate, and nitrate.
  3. 3 . The fabric care composition according to claim 1 , wherein the composition comprises from about 1% to about 35%, by weight of the composition, of the quaternary ammonium ester material.
  4. 4 . The fabric care composition according to claim 1 , wherein the fatty acids are derived from plants.
  5. 5 . The fabric care composition according to claim 1 , wherein the quaternary ammonium ester material comprises from about 40.0% to about 60.0%, by weight of the quaternary ammonium ester material, of a diester quaternary ammonium material (“diester quat”), and from about 15% to about 38.0%, by weight of the quaternary ammonium ester material, of triester quat.
  6. 6 . The consumer product composition according to claim 1 , wherein the benefit agent comprises perfume raw materials.
  7. 7 . The fabric care composition according to claim 1 , wherein the core of the delivery particles further comprise a partitioning modifier selected from the group consisting of vegetable oil, modified vegetable oil, mono-, di-, and tri-esters of C 4 -C 24 fatty acids, isopropyl myristate, dodecanophenone, lauryl laurate, methyl behenate, methyl laurate, methyl palmitate, methyl stearate, and mixtures thereof.
  8. 8 . The fabric care composition according to claim 1 , wherein the hydrolyzed chitosan is characterized by a degree of deacetylization of at least 92%.
  9. 9 . The fabric care composition according to claim 1 , wherein the shell comprises hydrolyzed chitosan at a level of at least 30 wt %, by weight of the shell.
  10. 10 . The fabric care composition according to claim 1 , wherein the polyisocyanate is selected from the group consisting of a polyisocyanurate of toluene diisocyanate, a trimethylol propane adduct of toluene diisocyanate, a trimethylol propane adduct of xylylene diisocyanate, methylene diphenyl isocyanate, toluene diisocyanate, tetramethylxylidene diisocyanate, naphthalene-1,5-diisocyanate, phenylene diisocyanate, or mixtures thereof.
  11. 11 . The fabric care composition according to claim 1 , wherein the delivery particles are formed by a process that comprises the following steps: forming a water phase by hydrolyzing chitosan in an aqueous acidic medium at a pH of 6.5 or less and a temperature of at least 60° C. for at least one hour; forming an oil phase comprising dissolving together at least one benefit agent and at least one polyisocyanate, with an added oil; forming an emulsion by mixing under high shear agitation the water phase and the oil phase into an excess of the water phase, thereby forming droplets of the oil phase and benefit agent dispersed in the water phase, and adjusting the pH of the emulsion to be in a range from pH 2 to pH 6; curing the emulsion by heating to at least 40° C., for a time sufficient to form the shell at an interface of the droplets with the water phase, the shell comprising the reaction product of the polyisocyanate and hydrolyzed chitosan, and the shell surrounding the core comprising the droplets of the oil phase and benefit agent.
  12. 12 . The fabric care composition according to claim 11 , wherein the weight ratio of hydrolyzed chitosan in the water phase as compared to the polyisocyanate in the oil phase is from about 21:79 to about 90:10.
  13. 13 . The fabric care composition according to claim 1 , wherein the chitosan is formed by hydrolyzing chitosan in an acidic medium at a pH of 6.5 or less, and at a temperature of at least 45 C for at least one hour.
  14. 14 . The fabric care composition according to claim 1 , wherein the delivery particles are characterized by a volume-weighted median particle size from about 1 to about 100 microns.
  15. 15 . The fabric care composition according to claim 1 , wherein the shells of the delivery particles degrade at least 60% in 60 days when tested according to test method OECD 301B.
  16. 16 . The fabric care composition according to claim 1 , wherein the composition further comprises a treatment adjunct selected from the group consisting of: additional fabric conditioning agents, dyes, pH control agents, solvents, rheology modifiers, structurants, cationic polymers, surfactants, perfume, additional perfume delivery systems, chelants, antioxidants, preservatives, and mixtures thereof.
  17. 17 . The fabric care composition according to claim 1 , wherein the fabric care composition is in the form of a liquid.
  18. 18 . The fabric care composition according to claim 1 , wherein the fabric care composition is characterized by a pH of from about 2 to about 5.

Description

This application claims benefit to Provisional Ser. No. 63/231,771, filed on Aug. 11, 2021. FIELD OF THE INVENTION The present disclosure relates to a fabric care composition that includes quaternary ammonium ester material and a population of delivery particles, where the quaternary ammonium ester material includes triester quaternary ammonium material (“triester quats”), and where the shells of the delivery particles include a polymeric material that is the reaction product of a polyisocyanate and chitosan, preferably hydrolyzed chitosan. The present disclosure also relates to a method of treating a fabric with the composition. BACKGROUND OF THE INVENTION Manufacturers of fabric care compositions often formulated with delivery particles, as such particles offer advantages for delivering benefit agents, such as long-term release profiles, or release at certain desirable touchpoints. Delivery particles made, at least in part, from naturally occurring materials are desirable for environmental reasons. Particles that are capable of biodegrading within certain periods of time are also desirable for similar reasons. Additionally, cationically charged particles may also be advantageous, as they tend to show improved deposition on negatively charged surfaces, which can include many types of fabrics such as cotton. Cationic charge can be provided by the addition of surface coatings, but such materials may need to be added at some point of the manufacturing process, thereby resulting in additional processing and cost. Therefore, there is an advantage to using materials that are naturally cationically under normal manufacturing, storage, and/or usage conditions. Deposition may also be improved via the use of deposition aids in a product formulation, but again, this brings extra steps, formulation space, and cost. It would be desirable to formulate a product that provides improved delivery particle deposition by using materials that can provide other benefits in the end-use of the product, thereby reducing complexity and/or cost. Deposition aids and/or coating may still be employed, but presumably they could be used at lower levels. Alternatively, they could be used in combination with the other materials to improve deposition and/or subsequent performance even more. There is a need for fabric care compositions that include combinations of ingredients, including delivery particles that preferably use natural materials and/or that biodegrade, that lead to improved benefit agent performance, such as the perception of increased perfume intensity. SUMMARY OF THE INVENTION The present disclosure relates to a fabric care composition that includes particular esterquats and particular delivery particles. For example, the present disclosure relates to a fabric care composition that includes: quaternary ammonium ester material, wherein the quaternary ammonium ester material includes triester quaternary ammonium material (“triester quats”), wherein the triester quaternary ammonium material is derived, in part, from C13-C22 fatty acids; and a population of delivery particles, where the delivery particles include a core and shell surrounding the core, where the core includes a benefit agent, where the shell comprises a polymeric material that is the reaction product of a polyisocyanate and chitosan, preferably hydrolyzed chitosan. A method of treating a fabric, wherein the method includes the step of contacting the fabric with a fabric care composition according to the present disclosure, optionally in the presence of water. DETAILED DESCRIPTION OF THE INVENTION The present disclosure relates to fabric care compositions that include certain quaternary ammonium ester material and certain delivery particles. For example, the quaternary ammonium ester material comprises triester quat material that is useful as a fabric conditioning/softening agent. The delivery particles are core/shell particles that include a benefit agent in the core, preferably fragrance, and a shell that includes a reaction product of chitosan and isocyanates. It is believed that the combination of the triester quat material and the chitosan/isocyanate delivery particles provides surprisingly good performance, particularly at the wet touchpoint. Additionally, such delivery particles may be preferred because the shells are at least partially derived from naturally-sourced material (chitosan). Furthermore, it is believed that selecting chitosan with certain characteristics, such as relatively low molecular weight, relatively high degrees of deacetylization, or both, can provide processing, performance, and/or biodegradeability benefits in the compositions of the present disclosure. These chitosan characteristics may be obtainable by using hydrolyzed chitosan, which may result from the chitosan being hydrolyzed under certain conditions. The materials, compositions, and related processes are discussed in more detail below. As used herein, the articles “a” and “an” w