EP-4734909-A1 - DISSOLVABLE SOLID CLEANSING ARTICLES CONTAINING SULFONATE-CONTAINING ANIONIC SURFACTANTS

Abstract

Disclosed is a dissolvable solid cleansing article comprising: a) from about 1% to about 60%, by weight on a dry article basis, of a polymeric structurant; b) from about 5% to about 90%, by weight on a dry article basis, of a surfactant system comprising a sulfonate-containing anionic surfactant; wherein the article contains less than 5% of glutamate anionic surfactant; and wherein the article is substantially free of sulfate-based surfactants. The dissolvable solid article of the present disclosure can provide reduced precipitation, especially when such dissolvable solid shampoo articles are used with hard water.

Inventors

• HILVERT, JENNIFER, ELAINE
• ABSHER, SARAH, NOELLE

Assignees

• The Procter & Gamble Company

Dates

Publication Date

20260506

Application Date

20240628

Claims (13)

1. 1. A dissolvable solid cleansing article comprising: a. from about 1% to about 60%, by weight on a dry article basis, of a polymeric structurant; b. from about 5% to about 90%, by weight on a dry article basis, of a surfactant system comprising a sulfonate-containing anionic surfactant; wherein the article contains less than 5% of glutamate anionic surfactant; and wherein the article is substantially free of sulfate-based surfactants.
2. 2. The article of any of the preceding claims, wherein the article comprises from about 10% to about 50%, preferably from about 20% to about 45%, more preferably from about 30% to about 40% of the sulfonate-containing anionic surfactant, of the sulfonate-containing anionic surfactant, by weight on a dry article basis.
3. 3. The article of any of the preceding claims, wherein the sulfonate-containing anionic surfactant is selected from the group consisting of sulfonate anionic surfactant, taurate anionic surfactant and isethionate anionic surfactant, sulfosuccinate anionic surfactant, sulfoacetate anionic surfactant, and mixtures thereof, preferably selected from the group consisting of sulfonate anionic surfactant, taurate anionic surfactant and isethionate anionic surfactant, and mixtures thereof, more preferably selected from the group consisting of sulfonate anionic surfactant.
4. 4. The article of any of the preceding claims, wherein the sulfonate-containing anionic surfactant is free of -COOH group.
5. 5. The article of any of the preceding claims, wherein the surfactant system comprises a cosurfactant selected from the group consisting of amphoteric surfactant, zwitterionic surfactant, and mixtures thereof, preferably wherein the co-surfactant is a sultaine surfactant, and more preferably wherein the sultaine surfactant is free of -COOH group.
6. 6. The article of any of the preceding claims, wherein the article comprises from about 0.5% to about 50% of the co- surfactant, by weight on a dry article basis.
7. 7. The article of any of the preceding claims, wherein the article contains less than 3% of glutamate anionic surfactant, preferably wherein the article is substantially free of glutamate anionic surfactant.
8. 8. The article of any of the preceding claims, wherein the article is substantially free of surfactants containing -COOH group.
9. 9. The article of any of the preceding claims, wherein the polymeric structurant is selected from carboxymethyl cellulose, starch, polyvinyl alcohol, and combinations thereof.
10. 10. The article of any of the preceding claims, wherein the article is a dissolvable solid fibrous article comprising a plurality of fibrous elements, wherein the plurality of fibrous elements are intertangled or otherwise associated with one another to form the fibrous article, preferably wherein the fibrous elements are homogeneous.
11. 11. The article of any of the preceding claims, further comprising a cationic polymer selected from Polyquatemium-6, Polyquaternium-10, Polyquaternium-76, cationic guars, and combinations thereof.
12. 12. The article of any of the preceding claims, wherein the article comprises a hand dissolution value of less than 15 strokes, preferably less than 10 strokes according to the Hand Dissolution Test Method.
13. 13. The article of any of the preceding claims, wherein the article is a personal cleansing article, preferably a shampoo article.

Description

DISSOLVABLE SOLID CLEANSING ARTICLES CONTAINING SULFONATE-CONTAINING ANIONIC SURFACTANTS FIELD OF THE INVENTION The present disclosure relates to A dissolvable solid cleansing article comprising: a) from about 1% to about 60%, by weight on a dry article basis, of a polymeric structurant; b) from about 5% to about 90%, by weight on a dry article basis, of a surfactant system comprising a sulfonate- containing anionic surfactant; wherein the article contains less than 5% of glutamate anionic surfactant; and wherein the article is substantially free of sulfate-based surfactants. The dissolvable solid article disclosed herein can provide reduced precipitation, especially when such dissolvable solid shampoo articles are used with hard water. BACKGROUND OF THE INVENTION Many personal care and other consumer products, including shampoos, in the market today are sold in liquid form. While widely used, liquid products often have tradeoffs in terms of packaging, storage, transportation, and convenience of use. For example, these products are generally formulated with a substantial amount of a liquid, such as water (e.g., -80% or more), preservatives, and stabilizers, that add significant bulk and translates to inefficient, costly shipping and storage. Also, liquid personal care products can be difficult to use in terms of controlling dosage and the delivery of the product. In order to overcome some of these drawbacks, it can be desirable to formulate personal care products as solid articles, such as fibrous articles. Fibrous articles can be desirable because the articles can quickly dissolve into a smooth composition. Fibrous articles that are shampoos can provide consumer acceptable amount of lather. Also, there has been a need for personal care products which are substantially free of sulfate-based surfactants. For example, US20210401677A1 discloses a dissolvable solid fibrous shampoo article comprising a plurality of fibrous elements comprising: a polymeric structurant; from 20% to about 70%, by weight on a dry article basis, of a surfactant system comprising: from about 35% to about 90%, by weight of the surfactant system on a dry article basis, of a primary anionic surfactant; and a co-surfactant; wherein the surfactant system is substantially free of sulfate-based surfactants. US20210401677A1 also discloses in Examples, such dissolvable solid fibrous shampoo article comprising approximately 36-39% of Disodium cocoyl glutamate as the primary anionic surfactant. However, the present inventors has found that there is a need to improve consumer usage feel in such dissolvable solid shampoo article comprising Disodium cocoyl glutamate, especially when such dissolvable solid shampoo articles are used with hard water. SUMMARY OF THE INVENTION The present disclosure is directed to a dissolvable solid shampoo article comprising: a. from about 1% to about 60%, by weight on a dry article basis, of a polymeric structurant; b. from about 5% to about 90%, by weight on a dry article basis, of a surfactant system comprising a sulfonate-containing anionic surfactant; wherein the article contains less than 5%, preferably less than 3% of glutamate anionic surfactant, more preferably wherein the article is substantially free of glutamate anionic surfactant; and wherein the article is substantially free of sulfate-based surfactants. It has been surprisingly found by the present inventors that disodium cocoyl glutamate forms deposits on hair, especially contained in dissolvable solid shampoo articles at a higher level, and especially when such dissolvable solid shampoo articles are used with hard water. Not being limited to the theory, it is believed that when dissolving such dissolvable solid shampoo articles on hands, the level of surfactants get higher than the level in conventional liquid shampoos, the formation of deposits may become obvious in such dissolvable solid shampoo articles compared to conventional liquid shampoos. The dissolvable solid article can provide reduced formation of deposit/precipitation, thus, provide improved consumer usage feel. It has been surprisingly found by the present inventors that, by the use of sulfonate-containing anionic surfactant, especially sulfonate anionic surfactant, the dissolvable solid article can provide reduced precipitation even when such dissolvable solid articles are used with hard water, yet can provide improved consumer usage feel and/or reduced deposits on hair when the dissolvable solid article are shampoo products. Such improved consumer usage feel include, for example, improved clean feeling, reduced coated or residue feeling, and/or improved smooth feeling. Additionally, the dissolvable solid article may allow a wider pH range during its manufacturing. Also, in some embodiments using a sultaine surfactant as a co- surfactant, the article provides further reduced precipitation in hard water and also provides better/faster dryness during manufacturing, compared to other a