Bar composition for high water structuring and incorporation

Abstract

A bar is provided comprising: a soap; water; a cellulose derivative selected from the group consisting of hydroxyalkyl alkyl cellulose; and an additive selected from the group consisting of psyllium, sodium silicate, and mixtures thereof; wherein the bar is a solid.

Description

[0001] This invention relates to a soap bar. Specifically, this invention relates to a soap bar comprising: soap; water; a cellulose derivative selected from the group consisting of hydroxyalkyl alkyl cellulose; and an additive selected from the group consisting of psyllium husk, sodium silicate, and mixtures thereof; wherein the soap bar is solid.

[0002] Bar soaps remain popular with consumers for cleaning clothes, hard surfaces, and skin.

[0003] Refined rolled soap bars are typically made from soap bar pellets containing more than 70% by weight total fatty substances (TFM), 10% to 14% by weight water, and other components such as titanium dioxide, surfactants, and fragrances. Currently, rolled soap bars typically have a water content of about 8% to 15% by weight, while unrolled soap bars have a water content of 20% to 25% by weight.

[0004] Different types of bar soaps are known. Conventional bar soaps are formulated with various additives to impart the inherent benefits of soap. Conventional bar soaps contain at least one soap (i.e., monovalent sodium, potassium, ammonium, and alkyl ammonium salts of monocarboxylic acid fatty acids) and optionally one or more auxiliaries such as humectants, wetting agents, antibacterial agents, water, fillers, polymers, processing aids, dyes, fragrances, etc., to enhance the cleaning and conditioning properties of the bar soap.

[0005] The goal is to produce soap bar compositions with high water content to improve formulation and processing efficiency. However, it remains difficult to maintain the high water content of the formulation after it has been processed into finished soap bars.

[0006] Therefore, new soap bar formulations are still needed that can achieve high water content in finished soap bars while maintaining other desired soap bar properties such as abrasion rate.

[0007] The present invention provides a soap bar comprising: 35% to <74.99% by weight of soap based on the weight of the soap bar; >23% to 40% by weight of water based on the weight of the soap bar; 0.01% to 5% by weight of a cellulose derivative based on the weight of the soap bar, said cellulose derivative being selected from the group consisting of hydroxyalkyl alkyl cellulose; and an additive selected from the group consisting of: (a) 0.1% to 5% by weight of psyllium husk based on the weight of the soap bar; (b) 2% to 18% by weight of sodium silicate based on the weight of the soap bar; and (c) mixtures thereof; wherein said soap bar is a solid.

[0008] The present invention provides a soap bar comprising: 35% to <74.89% by weight of soap based on the weight of the soap bar; >23% to 40% by weight of water based on the weight of the soap bar; 0.1% to 5% by weight of psyllium husk based on the weight of the soap bar; 0.01% to 5% by weight of a cellulose derivative selected from the group consisting of hydroxyalkyl alkyl cellulose based on the weight of the soap bar; and 2% to 18% by weight of sodium silicate based on the weight of the soap bar; wherein the soap bar is a solid.

[0009] The present invention provides a soap bar comprising: 35% to <74.89% by weight of soap based on the weight of the soap bar; >23% to 40% by weight of water based on the weight of the soap bar; 0.1% to 5% by weight of psyllium husk based on the weight of the soap bar; 0.01% to 5% by weight of a cellulose derivative based on the weight of the soap bar, the cellulose derivative being selected from the group consisting of hydroxyalkyl alkyl cellulose; wherein the cellulose derivative is selected from the group consisting of hydroxyethyl methylcellulose, hydroxypropyl methylcellulose, hydroxyethyl cellulose and mixtures thereof; and 2% to 18% by weight of sodium silicate based on the weight of the soap bar; wherein the soap bar is a solid.

[0010] The present invention provides a soap bar comprising: 35% to <74.88% by weight of soap based on the weight of the soap bar; >23% to 40% by weight of water based on the weight of the soap bar; 0.1% to 5% by weight of psyllium husk based on the weight of the soap bar; 0.01% to 5% by weight of a cellulose derivative based on the weight of the soap bar, the cellulose derivative being selected from the group consisting of hydroxyalkyl alkyl cellulose; wherein the cellulose derivative is hydroxyethyl methyl cellulose; 2% to 18% by weight of sodium silicate based on the weight of the soap bar; and 0.01% to 3% by weight of a processing aid based on the weight of the soap bar; wherein the soap bar is a solid.

[0011] The present invention provides a soap bar comprising: 35% to <74.87% by weight of soap based on the weight of the soap bar; >23% to 40% by weight of water based on the weight of the soap bar; 0.1% to 5% by weight of psyllium husk based on the weight of the soap bar; 0.01% to 5% by weight of a cellulose derivative based on the weight of the soap bar, the cellulose derivative being selected from the group consisting of hydroxyalkyl alkyl cellulose; wherein the cellulose derivative is hydroxyethyl methyl cellulose; 2% to 18% by weight of sodium silicate based on the weight of the soap bar; 0.01% to 3% by weight of a processing aid based on the weight of the soap bar; and 0.01% to 3% by weight of an optional component based on the weight of the soap bar, the optional component being selected from the group consisting of at least one of fragrances and dyes; wherein the soap bar is a solid.

[0012] The present invention provides a soap bar comprising: 35% to <74.87% by weight of soap based on the weight of the soap bar; >23% to 40% by weight of water based on the weight of the soap bar; 0.1% to 5% by weight of psyllium husk based on the weight of the soap bar; 0.01% to 5% by weight of a cellulose derivative based on the weight of the soap bar, the cellulose derivative being selected from the group consisting of hydroxyalkyl alkyl cellulose; wherein the cellulose derivative is hydroxyethyl methyl cellulose; 2% to 18% by weight of sodium silicate based on the weight of the soap bar; 0.01% to 3% by weight of a processing aid based on the weight of the soap bar; 0.01% to 3% by weight of optional components based on the weight of the soap bar, the optional components being selected from the group consisting of at least one of fragrances and dyes; and fillers; wherein the soap bar is solid, and wherein the soap bar is a laundry detergent soap bar.

[0013] The present invention provides a soap bar comprising: 35% to <74.77% by weight of soap based on the weight of the soap bar; >23% to 40% by weight of water based on the weight of the soap bar; 0.1% to 5% by weight of psyllium husk based on the weight of the soap bar; 0.01% to 5% by weight of a cellulose derivative based on the weight of the soap bar, the cellulose derivative being selected from the group consisting of hydroxyalkyl alkyl cellulose; wherein the cellulose derivative is hydroxyethyl methyl cellulose; 2% to 18% by weight of sodium silicate based on the weight of the soap bar; 0.01% to 3% by weight of a processing aid based on the weight of the soap bar; 0.01% to 3% by weight of optional components based on the weight of the soap bar, the optional components being selected from the group consisting of at least one of fragrances and dyes; and 0.1% to 5% by weight of a humectant based on the weight of the soap bar; wherein the soap bar is solid, and wherein the soap bar is a personal care soap bar.

[0014] This invention provides a soap bar comprising: 50% to <74.76% by weight of soap, based on the weight of the soap bar; >23% to 40% by weight of water, based on the weight of the soap bar; 0.1% to 5% by weight of psyllium husk, based on the weight of the soap bar; 0.01% to 5% by weight of a cellulose derivative, based on the weight of the soap bar, wherein the cellulose derivative is selected from the group consisting of hydroxyalkyl alkyl cellulose; and 2% by weight of psyllium husk, based on the weight of the soap bar. Sodium silicate, 1% to 18% by weight; processing aids, 0.01% to 3% by weight based on the weight of the soap bar; optional components, selected from the group consisting of at least one of fragrances and dyes, 0.1% to 5% by weight based on the weight of the soap bar; chelating agents, 0.01% to 0.5% by weight based on the weight of the soap bar; wherein the soap bar is solid, and wherein the soap bar is a personal care soap bar.

[0015] The present invention provides a method for preparing soap bars, the method comprising: providing soap; providing psyllium husk; providing a cellulose derivative selected from the group consisting of hydroxyalkyl alkyl cellulose; providing sodium silicate; providing water; mixing the soap, psyllium husk, hydroxyalkyl alkyl cellulose, sodium silicate and water to form a combination; rolling the combination; extruding the rolled combination; and stamping the extruded material to provide the soap bars.

[0016] This invention provides a method for preparing soap bars, the method comprising: providing soap; providing psyllium husk; providing a cellulose derivative selected from the group consisting of hydroxyalkyl alkyl cellulose; providing sodium silicate; providing water; providing filler; providing fragrance; and providing processing aids; mixing soap, psyllium husk, hydroxyalkyl alkyl cellulose, sodium silicate, filler, fragrance, titanium dioxide, and water to form a combination; rolling the combination; extruding the rolled combination; and stamping the extruded material to provide the soap bar. Detailed Implementation

[0017] We have surprisingly discovered that soap bars containing cellulose derivatives selected from the group consisting of hydroxyalkyl alkyl cellulose and at least one of psyllium and sodium silicate promote high water content (>23% by weight) in the finished soap bars while exhibiting enhanced abrasion resistance (preferably, wherein the finished soap bars exhibit long-term water retention and wherein the finished soap bars resist cracking due to water loss for up to one year).

[0018] Unless otherwise specified, ratios, percentages, parts, etc. are all by weight.

[0019] As used herein, unless otherwise specified, the terms “weight-average molecular weight” and “Mw” are used interchangeably and refer to the weight-average molecular weight measured in a conventional manner using gel permeation chromatography (GPC) and conventional standards such as polyethylene glycol standards. GPC techniques are discussed in detail in “Modern Size Exclusion Chromatography,” W.W.Yau, J.J. Kirkland, D.D.Bly; Wiley-Interscience, 1979, and in “A Guide to Materials Characterization and Chemical Analysis,” J.P. Sibilia; V.C., 1988, pp. 81–84. Weight-average molecular weight is reported in Daltons herein.

[0020] Preferably, the soap bar of the present invention comprises: 35% to <74.99% by weight (preferably 40% to 70% by weight; more preferably 45% to 68% by weight; most preferably 50% to 65% by weight) of soap based on the weight of the soap bar; >23% to 40% by weight (preferably 25.5% to 40% by weight; more preferably 25.75% to 37.5% by weight; most preferably 26% to 32% by weight) of water based on the weight of the soap bar; and 0.01% to 5% by weight (preferably 0.1% to 4.75% by weight; more preferably 0.25% to 4.5% by weight; most preferably 0.3% to 4% by weight) of a cellulose derivative selected from hydroxyl groups based on the weight of the soap bar. The group consisting of alkyl alkyl cellulose; and an additive selected from the group consisting of: (a) 0.1 wt% to 5 wt% (preferably 0.2 wt% to 4 wt%; more preferably 0.25 wt% to 3.5 wt%; most preferably 0.4 wt% to 3.2 wt%) of psyllium based on the weight of the soap bar; (b) 2 wt% to 18 wt% (preferably 2.25 wt% to 10 wt%; more preferably 2.5 wt% to 7.5 wt%; most preferably 3 wt% to 5 wt%) of sodium silicate based on the weight of the soap bar; and (c) mixtures thereof; wherein the soap bar is solid (i.e., wherein the soap bar does not imperceptibly change shape when placed on a rigid surface and left to stand at room temperature 22°C and pressure 101.4 kPa for 24 hours).

[0021] Preferably, the soap bar of the present invention comprises: 35% to <74.89% by weight (preferably 40% to 70% by weight; more preferably 45% to 68% by weight; most preferably 50% to 65% by weight) of soap based on the weight of the soap bar; >23% to 40% by weight (preferably 25.5% to 40% by weight; more preferably 25.75% to 37.5% by weight; most preferably 26% to 32% by weight) of water based on the weight of the soap bar; and 0.01% to 5% by weight (preferably 0.1% to 4.75% by weight; more preferably 0.25% to 4.5% by weight; most preferably 0.3% to 4% by weight) based on the weight of the soap bar. The cellulose derivative is selected from the group consisting of hydroxyalkyl alkyl cellulose; 0.1 wt% to 5 wt% (preferably, 0.2 wt% to 4 wt%; more preferably, 0.25 wt% to 3.5 wt%; most preferably, 0.4 wt% to 3.2 wt%) of psyllium husk based on the weight of the soap bar; 2 wt% to 18 wt% (preferably, 2.25 wt% to 10 wt%; more preferably, 2.5 wt% to 7.5 wt%; most preferably, 3 wt% to 5 wt%) of sodium silicate based on the weight of the soap bar; wherein the soap bar is solid (i.e., wherein the soap bar does not imperceptibly change shape when placed on a rigid surface and left to stand at room temperature 22°C and pressure 101.4 kPa for 24 hours).

[0022] Preferably, the soap bar of the present invention comprises: 35% to <74.99% by weight (preferably 40% to 70% by weight; more preferably 45% to 68% by weight; most preferably 50% to 65% by weight) of soap based on the weight of the soap bar; more preferably, the soap bar of the present invention comprises: 35% to <74.99% by weight (preferably 40% to 70% by weight; more preferably 45% to 68% by weight; most preferably 50% to 65% by weight) of soap based on the weight of the soap bar, wherein the soap is selected from the group consisting of: monovalent salts of monocarboxylic acid fatty acids having counterions selected from the group consisting of sodium, potassium, ammonium and alkyl ammonium ions. More preferably, the soap bar of the present invention comprises: 35% to <74.99% by weight (preferably 40% to 70% by weight; more preferably 45% to 68% by weight; most preferably 50% to 65% by weight) of soap based on the weight of the soap bar; wherein the soap is an alkali metal salt (preferably a sodium salt) of at least one fatty acid from animal fats and vegetable oils. Even more preferably, the soap bar composition of the present invention comprises: 35% to <74.99% by weight (preferably 40% to 70% by weight; more preferably 45% to 68% by weight; most preferably 50% to 65% by weight) of soap based on the weight of the soap bar; wherein the soap is an alkali metal salt (preferably a sodium salt) of at least one fatty acid from palm oil, palm kernel oil, castor oil, rice bran oil, sunflower oil, coconut oil, soybean oil, peanut oil, tallow, lard, fish oil, and blends thereof. More preferably, the soap bar of the present invention comprises: 35% to <74.99% by weight (preferably 40% to 70% by weight; more preferably 45% to 68% by weight; most preferably 50% to 65% by weight) of soap based on the weight of the soap bar; wherein the soap is an alkali metal salt (preferably a sodium salt) of fatty acids derived from a blend of oils and fats in a ratio of 40:60 to 97:3 (preferably, the blend of oils and fats is selected from a blend of palm oil and palm kernel oil and a blend of palm oil and coconut kernel oil). Most preferably, the soap bar of the present invention comprises: 35% to <74.99% by weight (preferably 40% to 70% by weight; more preferably 45% to 68% by weight; most preferably 50% to 65% by weight) of soap based on the weight of the soap bar; wherein the soap is an alkali metal salt (preferably a sodium salt) of fatty acids from a 50:50, 60:40, 70:30, 80:20 or 90:10 (preferably 80:20) blend of palm oil and palm kernel oil.

[0023] Preferably, the soap bar of the present invention comprises: >23% to 40% by weight (preferably 25.5% to 40% by weight; more preferably 25.75% to 37.5% by weight; most preferably 26% to 32% by weight) of water based on the weight of the soap bar. More preferably, the soap bar of the present invention comprises: >23% to 40% by weight (preferably 25.5% to 40% by weight; more preferably 25.75% to 37.5% by weight; most preferably 26% to 32% by weight) of water based on the weight of the soap bar; wherein the water is at least one of distilled water and deionized water. Most preferably, the soap bar of the present invention comprises: >23% to 40% by weight (preferably 25.5% to 40% by weight; more preferably 25.75% to 37.5% by weight; most preferably 26% to 32% by weight) of water based on the weight of the soap bar; wherein the water is deionized water.

[0024] Preferably, the soap bar of the present invention comprises: 0.01% to 5% by weight (preferably 0.1% to 4.75% by weight; more preferably 0.25% to 4.5% by weight; most preferably 0.3% to 4% by weight) of a cellulose derivative based on the weight of the soap bar, wherein the cellulose derivative is selected from the group consisting of hydroxyalkyl alkyl cellulose, hydroxyalkyl cellulose, and mixtures thereof. More preferably, the soap bar of the present invention comprises: 0.01% to 5% by weight (preferably 0.1% to 4.75% by weight; more preferably 0.25% to 4.5% by weight; most preferably 0.3% to 4% by weight) of a cellulose derivative based on the weight of the soap bar, wherein the cellulose derivative is selected from the group consisting of hydroxyalkyl alkyl cellulose; wherein the hydroxyalkyl alkyl cellulose is selected from hydroxy-(C 1-4 )alkyl C 1-4 The soap bar of the present invention comprises, based on the weight of the soap bar, 0.01 wt% to 5 wt% (preferably, 0.1 wt% to 4.75 wt%; more preferably, 0.25 wt% to 4.5 wt%; most preferably, 0.3 wt% to 4 wt%) of a cellulose derivative selected from the group consisting of hydroxyalkyl alkyl cellulose; wherein the hydroxyalkyl alkyl cellulose is selected from the group consisting of hydroxyethyl methyl cellulose, hydroxypropyl methyl cellulose, and mixtures thereof. Most preferably, the soap bar of the present invention comprises, based on the weight of the soap bar, 0.01 wt% to 5 wt% (preferably, 0.1 wt% to 4.75 wt%; more preferably, 0.25 wt% to 4.5 wt%; most preferably, 0.3 wt% to 4 wt%) of a cellulose derivative selected from the group consisting of hydroxyalkyl alkyl cellulose; wherein the hydroxyalkyl alkyl cellulose is hydroxyethyl methyl cellulose.

[0025] Preferably, the soap bar of the present invention comprises: 0.01 wt% to 5 wt% (preferably 0.1 wt% to 4.75 wt%; more preferably 0.25 wt% to 4.5 wt%; most preferably 0.3 wt% to 4 wt%) of a cellulose derivative, based on the weight of the soap bar, wherein the cellulose derivative is selected from the group consisting of hydroxyalkyl alkyl celluloses; wherein the weight-average molecular weight M of the hydroxyalkyl alkyl cellulose is... W The soap bar of the present invention comprises 25,000 to 4,000,000 Daltons (preferably, 25,000 to 1,500,000 Daltons; more preferably, 25,000 to 500,000 Daltons; most preferably, 25,000 to 150,000 Daltons). More preferably, the soap bar of the present invention comprises, based on the weight of the soap bar, 0.01% to 5% by weight (preferably, 0.1% to 4.75% by weight; more preferably, 0.25% to 4.5% by weight; most preferably, 0.3% to 4% by weight) of a cellulose derivative selected from the group consisting of hydroxyalkyl alkyl celluloses; wherein the weight average molecular weight M of the hydroxyalkyl alkyl cellulose is... W The hydroxyalkyl cellulose has a molecular weight of 25,000 to 4,000,000 Daltons (preferably 25,000 to 1,500,000 Daltons; more preferably 25,000 to 500,000 Daltons; most preferably 25,000 to 150,000 Daltons); and wherein the hydroxyalkyl cellulose is selected from hydroxyethyl methylcellulose, hydroxypropyl methylcellulose, and mixtures thereof. Most preferably, the soap bar of the present invention comprises: 0.01% to 5% by weight (preferably 0.1% to 4.75% by weight; more preferably 0.25% to 4.5% by weight; most preferably 0.3% to 4% by weight) of a cellulose derivative based on the weight of the soap bar, the cellulose derivative being selected from the group consisting of hydroxyalkyl celluloses; wherein the weight-average molecular weight M of the hydroxyalkyl cellulose is... W The hydroxyalkyl cellulose is 25,000 to 4,000,000 Daltons (preferably 25,000 to 1,500,000 Daltons; more preferably 25,000 to 500,000 Daltons; most preferably 25,000 to 150,000 Daltons); and wherein the hydroxyalkyl cellulose is hydroxyethyl methyl cellulose.

[0026] Preferably, the soap bar of the present invention comprises: 0.01% to 5% by weight (preferably 0.1% to 4.75% by weight; more preferably 0.25% to 4.5% by weight; most preferably 0.3% to 4% by weight) of a cellulose derivative based on the weight of the soap bar, the cellulose derivative being selected from the group consisting of hydroxyalkyl alkyl celluloses; wherein the hydroxyalkyl alkyl cellulose is a cellulose ether having alkyl and hydroxyalkyl derivatives, wherein the average number of substituents per glucosinolate unit is 1 to 3 (preferably 1.5 to 3; more preferably 2 to 3). Preferably, the hydroxyalkyl group has 1 to 4 carbon atoms (preferably 1 to 3 carbon atoms; more preferably 2 to 3 carbon atoms; most preferably 2 carbon atoms). Preferably, the alkyl group has 1 to 4 carbon atoms (preferably 1 to 3 carbon atoms); more preferably 1 to 2 carbon atoms; most preferably 1 carbon atom).

[0027] Preferably, the soap bar of the present invention comprises, based on the weight of the soap bar, 0.01% to 5% by weight (preferably, 0.1% to 4.75% by weight; more preferably, 0.25% to 4.5% by weight; most preferably, 0.3% to 4% by weight) of a cellulose derivative selected from the group consisting of hydroxyalkyl alkyl celluloses; wherein the hydroxyalkyl alkyl cellulose has a substantially linear cellulose backbone. The term “substantially linear” as used herein and in the appended claims means that 97% to 100% by weight (preferably 99% to 100% by weight) of all glucose units in the hydroxyalkyl alkyl cellulose are located in the backbone of the cellulose backbone.

[0028] Preferably, the soap bar of the present invention comprises, based on the weight of the soap bar, 0.01% to 5% by weight (preferably, 0.1% to 4.75% by weight; more preferably, 0.25% to 4.5% by weight; most preferably, 0.3% to 4% by weight) of a cellulose derivative selected from the group consisting of hydroxyalkyl alkyl celluloses; wherein the hydroxyalkyl alkyl cellulose has a substantially β-1,4-linked backbone. The term “substantially β-1,4-linked backbone” as used herein and in the appended claims means that 97% to 100% by weight (preferably 99% to 100% by weight) of glucose units in the hydroxyalkyl alkyl cellulose are linked together by β-1,4 bonds. When less than 100% by weight of glucose units are bound to β-1,4 bonds, the remaining glucose units can be bound in a variety of ways, including, for example, β-1,2 bonds; β-1,3 bonds; β-1,6 bonds; β-2,3 bonds; α-1,2 bonds; α-1,3 bonds; α-1,4 bonds; α-1,6 bonds and α-2,3 bonds and mixtures thereof.

[0029] Preferably, the soap bar of the present invention comprises: 0.1% to 5% by weight (preferably 0.2% to 4% by weight; more preferably 0.25% to 3.5% by weight; most preferably 0.4% to 3.2% by weight) of psyllium seeds based on the weight of the soap bar. Psyllium seeds are commercially available in granular or powder form. Psyllium seeds are branched and mainly composed of neutral arabinoyl xylan having a (1→4) and (1→3) xylanose backbone; wherein the side chains consist of arabinose and xylose, which are linked to the backbone via O-3 and / or O-2 bonds. Psyllium seeds can be extracted from the seed coat (outer skin or outer shell) of *Plantago ovata* or the seeds of *Plantago asiatica*. Psyllium seeds mainly consist of arabinose (22% by weight), xylose (57% by weight), and uronic acid (10% to 15% by weight), as well as small amounts of galactose, rhamnose, glucose, and mannose. Psyllium husk is a highly branched acidic arachidonic xylan with a high molecular weight (approximately 1,500,000 Daltons).

[0030] Preferably, the soap bar of the present invention comprises: 2% to 18% by weight (preferably 2.25% to 10% by weight; more preferably 2.5% to 7.5% by weight; most preferably 3% to 5% by weight) sodium silicate based on the weight of the soap bar.

[0031] Preferably, the soap bar of the present invention comprises a blend of psyllium and cellulose derivatives in a weight ratio of 1:9 to 9:1 (preferably 1:5 to 5:1; more preferably 1:4 to 4:1).

[0032] Preferably, the soap bar of the present invention is solid. As used herein and in the appended claims, the term "solid" with respect to the soap bar means that when the soap bar is placed on a rigid surface and left to stand on the rigid surface at room temperature (22°C) and pressure (101.4 kPa) for 24 hours, the soap bar does not perceptibly change shape.

[0033] Preferably, the soap bar of the present invention has an abrasion rate of 0.5% to 9% by weight (more preferably, 1% to 8% by weight), wherein the abrasion rate is the weight loss of the soap bar after 4 days of use, as described in the examples.

[0034] Preferably, the soap bar of the present invention further comprises optional ingredients. More preferably, the soap bar of the present invention further comprises optional ingredients; wherein the optional ingredients are selected from the group consisting of: humectants, processing aids (e.g., titanium dioxide); preservatives (e.g., benzoic acid, sorbic acid, phenoxyethanol); antioxidants (e.g., butylated hydroxytoluene); viscosity modifiers; polymers; free fatty acids; foam stabilizers; foam enhancers; fillers; chelating agents; antimicrobial agents (e.g., biocides); pH adjusters; pH buffers; fragrances / perfumes; salts; colorants (e.g., dyes) and mixtures thereof. Most preferably, the soap bar of the present invention further comprises optional ingredients selected from the group consisting of processing aids (e.g., titanium dioxide), fragrances, colorants, and mixtures thereof.

[0035] Preferably, the soap bar of the present invention further comprises a humectant. More preferably, the soap bar of the present invention further comprises: 0.1% to 5% by weight (preferably 0.25% to 2% by weight; more preferably 0.5% to 1.5% by weight; most preferably 0.75% to 1.25% by weight) of a humectant based on the weight of the soap bar. More preferably, the soap bar of the present invention further comprises: 0.1% to 5% by weight (preferably 0.25% to 2% by weight; more preferably 0.5% to 1.5% by weight; most preferably 0.75% to 1.25% by weight) of a humectant based on the weight of the soap bar; wherein the humectant is a polyol selected from the group consisting of: glycerol, sorbitol, propylene glycol, butylene glycol, hexanediol, ethoxylated glucose, 1,2-hexanediol, glycerol, dipropylene glycol, erythritol, trehalose, diglycerol, xylitol, maltitol, maltose, glucose, fructose, and mixtures thereof. More preferably, the soap bar of the present invention further comprises: 0.1% to 5% by weight (preferably 0.25% to 2% by weight; more preferably 0.5% to 1.5% by weight; most preferably 0.75% to 1.25% by weight) of a humectant based on the weight of the soap bar; wherein the humectant comprises glycerin. Most preferably, the soap bar of the present invention further comprises: 0.1% to 5% by weight (preferably 0.25% to 2% by weight; more preferably 0.5% to 1.5% by weight; most preferably 0.75% to 1.25% by weight) of a humectant based on the weight of the soap bar; wherein the humectant is glycerin.

[0036] Preferably, the soap bar of the present invention further comprises a processing aid. More preferably, the soap bar of the present invention further comprises: 0.05% to 2% by weight (preferably 0.1% to 1.5% by weight; more preferably 0.25% to 1.25% by weight; most preferably 0.5% to 1% by weight) of a processing aid based on the weight of the soap bar. Still more preferably, the soap bar of the present invention further comprises: 0.05% to 2% by weight (preferably 0.1% to 1.5% by weight; more preferably 0.25% to 1.25% by weight; most preferably 0.5% to 1% by weight) of a processing aid based on the weight of the soap bar; wherein the processing aid is an inorganic powder material selected from the group consisting of: talc, calcite, kaolin, silica, titanium dioxide, diatomaceous earth, and mixtures thereof. More preferably, the soap bar of the present invention further comprises: 0.05 wt% to 2 wt% (preferably 0.1 wt% to 1.5 wt%; more preferably 0.25 wt% to 1.25 wt%; most preferably 0.5 wt% to 1 wt%) of processing aids based on the weight of the soap bar; wherein the processing aids are selected from the group consisting of talc, calcite, titanium dioxide, and mixtures thereof. Most preferably, the soap bar of the present invention further comprises: 0.05 wt% to 2 wt% (preferably 0.1 wt% to 1.5 wt%; more preferably 0.25 wt% to 1.25 wt%; most preferably 0.5 wt% to 1 wt%) of processing aids based on the weight of the soap bar; wherein the processing aids include titanium dioxide.

[0037] Preferably, the soap bar of the present invention further comprises a chelating agent. More preferably, the soap bar of the present invention further comprises: 0.01% to 0.5% by weight (preferably, 0.05% to 0.3% by weight; more preferably, 0.075% to 0.25% by weight; most preferably, 0.1% to 0.2% by weight) of a chelating agent based on the weight of the soap bar. Still more preferably, the soap bar of the present invention further comprises: 0.01% to 0.5% by weight (preferably, 0.05% to 0.3% by weight; more preferably, 0.075% to 0.25% by weight; most preferably, 0.1% to 0.2% by weight) of a chelating agent based on the weight of the soap bar; wherein the chelating agent is selected from the group consisting of: diethylenetriaminepentaacetic acid; 1-hydroxyethane-1,1-bisphosphonic acid; citric acid; ethylenediaminetetraacetic acid (EDTA), its salts, and mixtures thereof. More preferably, the soap bar of the present invention further comprises: 0.01% to 0.5% by weight (preferably 0.05% to 0.3% by weight; more preferably 0.075% to 0.25% by weight; most preferably 0.1% to 0.2% by weight) of a chelating agent based on the weight of the soap bar; wherein the chelating agent is selected from the group consisting of: pentasodium diethylenetriaminepentaacetate, disodium 1-hydroxyethane-1,1-bisphosphonate; citric acid, ethylenediaminetetraacetic acid (EDTA), tetrasodium ethylenediaminetetraacetate, and mixtures thereof. Most preferably, the soap bar of the present invention further comprises: 0.01% to 0.5% by weight (preferably 0.05% to 0.3% by weight; more preferably 0.075% to 0.25% by weight; most preferably 0.1% to 0.2% by weight) of a chelating agent based on the weight of the soap bar; wherein the chelating agent includes tetrasodium ethylenediaminetetraacetate.

[0038] Preferably, the soap bar of the present invention further comprises a fragrance. More preferably, the soap bar of the present invention further comprises, based on the weight of the soap bar, 0.01% to 3% by weight (preferably, 0.1% to 2% by weight; more preferably, 0.5% to 1.75% by weight; most preferably, 0.75% to 1.25% by weight) of a fragrance.

[0039] Preferably, the soap bar of the present invention further comprises a colorant. More preferably, the soap bar of the present invention further comprises: 0.01% to 3% by weight (preferably 0.1% to 2% by weight; more preferably 0.5% to 1.75% by weight; most preferably 0.75% to 1.25% by weight) of colorant based on the weight of the soap bar.

[0040] Preferably, the soap bar of the present invention comprises: 35% to <74.89% by weight (preferably 40% to 70% by weight; more preferably 45% to 68% by weight; most preferably 50% to 65% by weight) of soap based on the weight of the soap bar; >23% to 40% by weight (preferably 25.5% to 40% by weight; more preferably 25.75% to 37.5% by weight; most preferably 26% to 32% by weight) of water based on the weight of the soap bar; and [the remaining amount is missing from the original text]. 0.1 wt% to 5 wt% (preferably 0.2 wt% to 4 wt%; more preferably 0.25 wt% to 3.5 wt%; most preferably 0.4 wt% to 3.2 wt%) of psyllium husk; and 0.01 wt% to 5 wt% (preferably 0.1 wt% to 4.75 wt%; more preferably 0.25 wt% to 4.5 wt%; most preferably 0.3 wt% to 4 wt%) of a cellulose derivative selected from the group consisting of hydroxyalkyl alkyl celluloses, based on the weight of soap bars. The cellulose derivative is hydroxyethyl methylcellulose; sodium silicate, 2% to 18% by weight (preferably 2.25% to 10% by weight; more preferably 2.5% to 7.5% by weight; most preferably 3% to 5% by weight) based on the weight of the soap bar; optionally, processing aids, preferably 0.01% to 3% by weight (more preferably 0.1% to 2% by weight; still more preferably 0.25% to 1.5% by weight; most preferably 0.5% by weight) based on the weight of the soap bar. Up to 1.0 wt% (0.75 wt%) of processing aids (preferably titanium dioxide); optionally, optional components selected from at least one of fragrances and colorants (preferably, 0.01 wt% to 3 wt% (more preferably, 0.1 wt% to 2 wt%; still more preferably, 0.25 wt% to 1.5 wt%; most preferably, 0.5 wt% to 1.0 wt%) of optional components selected from at least one of fragrances and colorants); wherein the soap bar is solid, and wherein the soap bar is a laundry soap bar.More preferably, the soap bar of the present invention comprises: 35% to <74.89% by weight (preferably 40% to 70% by weight; more preferably 45% to 68% by weight; most preferably 50% to 65% by weight) of soap based on the weight of the soap bar; and >23% to 40% by weight (preferably 25.5% to 40% by weight; more preferably 25.75% to 37.5% by weight; most preferably 26% to 32% by weight) of soap based on the weight of the soap bar. Water (wt%); 0.1 wt% to 5 wt% (preferably 0.2 wt% to 4 wt%; more preferably 0.25 wt% to 3.5 wt%; most preferably 0.4 wt% to 3.2 wt%) of psyllium husk based on the weight of soap bars; 0.01 wt% to 5 wt% (preferably 0.1 wt% to 4.75 wt%; more preferably 0.25 wt% to 4.5 wt%; most preferably 0.3 wt% to 4 wt%) of fiber based on the weight of soap bars. The soap bar contains: a cellulose derivative selected from the group consisting of hydroxyalkyl alkyl celluloses, wherein the cellulose derivative is hydroxyethyl methyl cellulose; 2% to 18% (preferably 2.25% to 10%; more preferably 2.5% to 7.5%; most preferably 3% to 5%) sodium silicate based on the weight of the soap bar; 0.01% to 3% (preferably 0.1% to 2%; more preferably 0.25% to 1.5%; most preferably 0.5% to 1.0%) of a processing aid (preferably titanium dioxide) based on the weight of the soap bar; and 0.01% to 3% (preferably 0.1% to 2%; more preferably 0.25% to 1.5%; most preferably 0.5% to 1.0%) of optional components selected from at least one of fragrances and colorants; wherein the soap bar is solid, and wherein the soap bar is a laundry detergent soap bar.

[0041] Preferably, the soap bar of the present invention comprises: 35% to <74.89% by weight (preferably 40% to 70% by weight; more preferably 45% to 68% by weight; most preferably 50% to 65% by weight) of soap based on the weight of the soap bar; >23% to 40% by weight (preferably 25.5% to 40% by weight; more preferably 25.75% to 37.5% by weight; most preferably 26% to 32% by weight) of water based on the weight of the soap bar; and 0.1% to 5% by weight (preferably 0.2% to 4% by weight; more preferably 0.25% to 3.5% by weight) based on the weight of the soap bar. Most preferably, 0.4 wt% to 3.2 wt% of psyllium husk; 0.01 wt% to 5 wt% (preferably 0.1 wt% to 4.75 wt%; more preferably 0.25 wt% to 4.5 wt%; most preferably 0.3 wt% to 4 wt%) of a cellulose derivative selected from the group consisting of hydroxyalkyl alkyl celluloses, wherein the cellulose derivative is hydroxyethyl methyl cellulose; 2 wt% to 18 wt% (preferably 2.25 wt% to 10 wt%; more preferably 2.5 wt% to 7.5 wt%; most preferably 3 wt% to 5 wt%) of sodium silicate based on the weight of the soap bar; any Optionally, a processing aid (based on the weight of the soap bar, preferably 0.01 wt% to 3 wt% (more preferably 0.1 wt% to 2 wt%; still more preferably 0.25 wt% to 1.5 wt%; most preferably 0.5 wt% to 1.0 wt%) of processing aid (preferably titanium dioxide)); optionally, an optional component selected from at least one of fragrances and colorants (preferably 0.01 wt% to 3 wt% (more preferably 0.1 wt% to 2 wt%; still more preferably 0.25 wt% to 1.5 wt%; most preferably 0.5 wt% to 1.0 wt%) of optional components selected from at least one of fragrances and colorants; Optionally, a humectant (preferably, 0.1% to 5% by weight (more preferably, 0.25% to 2% by weight; still more preferably, 0.5% to 1.5% by weight; most preferably, 0.75% to 1.25% by weight) based on the weight of the soap bar); and optionally, a chelating agent (preferably, 0.01% to 0.5% by weight (more preferably, 0.05% to 0.3% by weight; still more preferably, 0.075% to 0.25% by weight; most preferably, 0.1% to 0.2% by weight) based on the weight of the soap bar); wherein the soap bar is solid, and wherein the soap bar is a personal cleaning soap bar.More preferably, the soap bar of the present invention comprises: 35% to <74.89% by weight (preferably 40% to 70% by weight; more preferably 45% to 68% by weight; most preferably 50% to 65% by weight) of soap based on the weight of the soap bar; >23% to 40% by weight (preferably 25.5% to 40% by weight; more preferably 25.75% to 37.5% by weight; most preferably 26% to 32% by weight) of water based on the weight of the soap bar; and 0.1% to 5% by weight (preferably 0.2% to 4% by weight) based on the weight of the soap bar. More preferably, 0.25% to 3.5% by weight; most preferably, 0.4% to 3.2% by weight) of psyllium husk; 0.01% to 5% by weight (preferably, 0.1% to 4.75% by weight; more preferably, 0.25% to 4.5% by weight; most preferably, 0.3% to 4% by weight) of a cellulose derivative, selected from the group consisting of hydroxyalkyl alkyl celluloses, wherein the cellulose derivative is hydroxyethyl methyl cellulose; and 2% to 18% by weight (preferably, 2.25% to 10% by weight; more preferably, 0.4% to 3.2% by weight) of psyllium husk based on the weight of soap bars. Preferably, 2.5% to 7.5% by weight; most preferably, 3% to 5% by weight) of sodium silicate; 0.01% to 3% by weight (preferably, 0.1% to 2% by weight; more preferably, 0.25% to 1.5% by weight; most preferably, 0.5% to 1.0% by weight) of processing aid (preferably, titanium dioxide) based on the weight of soap bars; 0.01% to 3% by weight (preferably, 0.1% to 2% by weight; more preferably, 0.25% to 1.5% by weight; most preferably, 0.5% to 1.0% by weight) of a selection from fragrances and colorants. The soap bar contains at least one optional component; 0.1% to 5% by weight (preferably 0.25% to 2% by weight; more preferably 0.5% to 1.5% by weight; most preferably 0.75% to 1.25% by weight) of a humectant based on the weight of the soap bar; and 0.01% to 0.5% by weight (preferably 0.05% to 0.3% by weight; more preferably 0.075% to 0.25% by weight; most preferably 0.1% to 0.2% by weight) of a chelating agent based on the weight of the soap bar; wherein the soap bar is solid, and wherein the soap bar is a personal cleaning soap bar.

[0042] Preferably, the method for preparing the soap bar of the present invention comprises: providing soap (preferably, wherein the soap is provided in the form of soap bar pellets; more preferably, wherein the soap is provided in the form of soap bar pellets containing an aqueous mixture of at least 70% by weight total fatty substances (TFM) and 10% to 15% by weight water); providing psyllium; providing a cellulose derivative selected from the group consisting of hydroxyalkyl alkyl cellulose (preferably, wherein the hydroxyalkyl alkyl cellulose is hydroxyethyl methyl cellulose); providing sodium silicate; providing water; mixing the soap, psyllium, hydroxyalkyl alkyl cellulose, sodium silicate and water to form a combination (preferably, the soap, psyllium, hydroxyalkyl alkyl cellulose, sodium silicate and water are heated during mixing to form the combination); rolling the combination; extruding the rolled combination; and stamping the extruded material to provide the soap bar. More preferably, the method for preparing the soap bar of the present invention comprises: providing soap (preferably, wherein the soap is provided in the form of soap bar pellets; more preferably, wherein the soap is provided in the form of soap bar pellets, the soap bar pellets comprising an aqueous mixture of at least 70% by weight total fatty substances (TFM) and 10% to 15% by weight water); providing psyllium; providing a cellulose derivative selected from the group consisting of hydroxyalkyl alkyl cellulose (preferably, wherein the hydroxyalkyl alkyl cellulose is hydroxyethyl methyl cellulose); providing sodium silicate; providing water; providing a fragrance and providing a processing aid; wherein the soap, psyllium, hydroxyalkyl alkyl cellulose, sodium silicate, fragrance, processing aid and water are mixed to form a combination (preferably, the soap, psyllium, hydroxyalkyl alkyl cellulose, sodium silicate, fragrance, processing aid and water are heated during mixing to form the combination); rolling the combination; extruding the rolled combination; and stamping the extruded material to provide the soap bar.

[0043] Some embodiments of the present invention will now be described in detail in the following examples.

[0044] Comparative Examples C1-C2 and Examples 1-10: Soap Bars

[0045] For each of Comparative Examples C1-C2 and Examples 1-10, soap bars having the compositions shown in Table 1 were prepared. The soap bar granules were crushed in a sigma mixer and mixed in the sigma mixer with the other ingredients shown in Table 1 in the same quantities. All ingredients were added sequentially, without a specific order, except for the fragrance added last. The entire material was then transferred from the sigma mixer to a three-roll mill to grind the mixture. All processes were carried out under laboratory conditions. The material received from the roll mill was then pressed into strips in a screw press and extruded at a temperature of 45°C to 65°C. The extruded material was then cut into small pieces and stamped in soap molds to provide the final product, soap bars.

[0046]

[0047] soap bar wear rate

[0048] Trained team members evaluated each soap bar prepared according to Comparative Example C1 and Examples 1-10 using the following test protocol, assessing wear rate by the percentage weight loss of the soap bar after 4 days of use. A 20cm x 15cm poplin fabric was immersed in water. The soap bars were first weighed (three copies of each soap bar composition were tested). The soap bars were rubbed 10 times with the top surface of the strip on the fabric surface. Each rub was a horizontal stroke. Then, using a similar method, the soap bars were rubbed 10 times with the bottom surface on different fabrics kept under the same conditions. A total of 20 rubs were performed on each soap bar. The soap bars were left to stand for 30 minutes, and then the process was repeated. This process was repeated five times per day for each soap bar (i.e., 100 rubs per soap bar per day). The soap bars were then kept in Petri dishes in trays containing some water, covered overnight with a paraffin film to create humidity. The process was repeated the next day (i.e., 100 rubs per soap bar), and then the soap bars were stored as described. This continued for four consecutive days. On the fifth day, the soap bars were weighed, and the average wear rate was recorded in Table 2.

[0049] Table 2

[0050] C1 9.12 1 0.11 2 6.13 3 4.55 4 3.49 5 6.67 6 6.86 7 1.04 8 6.36 9 7.95 10 7.78

Claims

1. A soap bar, comprising: Based on the weight of the soap bars, 35% to <75% by weight of soap; Based on the weight of the soap bar, >23% to 40% water; Based on the weight of the soap bar, 0.01% to 5% by weight of a cellulose derivative, wherein the cellulose derivative is selected from the group consisting of hydroxyalkyl alkyl celluloses; and Additives, wherein the additives are a mixture of the following: Based on the weight of the soap bar, 0.1% to 5% by weight of psyllium husk; and Based on the weight of the soap bar, 2% to 18% sodium silicate; The soap bar mentioned therein is a solid.

2. The soap bar according to claim 1, wherein the cellulose derivative is selected from the group consisting of hydroxyethyl methylcellulose, hydroxypropyl methylcellulose, hydroxyethyl cellulose, and mixtures thereof.

3. The soap bar according to claim 2, further comprising 0.01% to 3% by weight of processing aids based on the weight of the soap bar.

4. The soap bar according to claim 3, further comprising, based on the weight of the soap bar, an optional component of 0.01% to 3% by weight, said optional component being selected from the group consisting of at least one of fragrances and dyes.

5. The soap bar according to claim 4, further comprising filler; and wherein the soap bar is a laundry soap bar.

6. The soap bar of claim 4, further comprising 0.1% to 5% by weight of a wetting agent based on the weight of the soap bar; and wherein the soap bar is a personal cleaning soap bar.

7. The soap bar according to claim 6, further comprising 0.01% to 0.5% by weight of a chelating agent based on the weight of the soap bar.

8. A method for preparing soap bars, comprising: Soap is provided; Provide psyllium; Provides a cellulose derivative, said cellulose derivative being selected from the group consisting of hydroxyalkyl alkyl celluloses; Provide sodium silicate; Provide water; The soap, psyllium, hydroxyalkyl alkyl cellulose, sodium silicate, and water are mixed to form a combination; Roll the assembly; The combination rolled by extrusion; and The extruded material is stamped to provide the soap bar.

9. The method according to claim 8, further comprising: Provide fragrances; as well as Provide processing aids; The fragrance and the processing aid are mixed with the soap, the psyllium, the hydroxyalkyl alkyl cellulose, the sodium silicate, and the water to form a combination.

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