US20110104096A1 - Cationic Surfactant Systems Comprising Microfibrous Cellulose - Google Patents

Cationic Surfactant Systems Comprising Microfibrous Cellulose Download PDF

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US20110104096A1
US20110104096A1 US12/984,382 US98438211A US2011104096A1 US 20110104096 A1 US20110104096 A1 US 20110104096A1 US 98438211 A US98438211 A US 98438211A US 2011104096 A1 US2011104096 A1 US 2011104096A1
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microfibrous cellulose
cationic
composition
cationic surfactant
concentration
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US12/984,382
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John M. Swazey
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CP Kelco US Inc
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CP Kelco US Inc
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Assigned to BANK OF AMERICA, N.A. reassignment BANK OF AMERICA, N.A. SECURITY AGREEMENT Assignors: 333 ASSOCIATES LLC, 333 PARTNERS LLC, CELTEGAN LLC, CP KELCO U.S., INC., HUBER CST COMPANY, HUBER CST CORPORATION, HUBER ENERGY L.P., HUBER ENERGY LLC, HUBER ENGINEERED WOODS LLC, HUBER EQUITY CORPORATION, HUBER INTERNATIONAL CORP., HUBER RESOURCES CORP., HUBER SOUTH TEXAS GP, LLC, HUBER SOUTH TEXAS LP, LLC, HUBER TIMBER INVESTMENTS LLC, HUBER TIMBER LLC, J.M. HUBER CORPORATION, J.M. HUBER MICROPOWDERS INC., JMH PARTNERS CORP., KELCO COMPANY, ST. PAMPHILE TIMBER LLC, TABSUM, INC., TARA INSURANCE GLOBAL LIMITED, UNDERGROUND WAREHOUSES, INC.
Publication of US20110104096A1 publication Critical patent/US20110104096A1/en
Assigned to CP KELCO U.S., INC., KELCO COMPANY, J.M. HUBER MICROPOWDERS INC., TABSUM, INC., QUINCY WAREHOUSES, INC. (FORMERLY UNDERGROUND WAREHOUSES, INC., HUBER ENGINEERED WOODS LLC, HUBER ENERGY L.P., HUBER ENERGY LLC, HUBER SOUTH TEXAS GP, LLC, HUBER SOUTH TEXAS LP, LLC, J.M. HUBER CORPORATION, 333 ASSOCIATES LLC, 333 PARTNERS LLC, CELTEGAN LLC, HUBER CST COMPANY, HUBER CST CORPORATION, HUBER EQUITY CORPORATION, HUBER INTERNATIONAL CORP., HUBER RESOURCES CORP., JMH PARTNERS CORP., TARA INSURANCE GLOBAL LIMITED, HUBER TIMBER INVESTMENTS LLC, HUBER TIMBER LLC, ST. PAMPHILE TIMBER LLC reassignment CP KELCO U.S., INC. RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: BANK OF AMERICA, N.A.
Assigned to WELLS FARGO BANK, NATIONAL ASSOCIATION, AS AGENT reassignment WELLS FARGO BANK, NATIONAL ASSOCIATION, AS AGENT SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CP KELCO U.S., INC., HUBER ENGINEERED WOODS LLC, J.M. HUBER CORPORATION
Assigned to HUBER ENGINEERED WOODS LLC, J.M. HUBER CORPORATION, CP KELCO U.S., INC. reassignment HUBER ENGINEERED WOODS LLC RELEASE OF SECURITY INTEREST IN PATENTS Assignors: WELLS FARGO BANK, NATIONAL ASSOCIATION
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    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16Organic compounds
    • C11D3/20Organic compounds containing oxygen
    • C11D3/22Carbohydrates or derivatives thereof
    • C11D3/222Natural or synthetic polysaccharides, e.g. cellulose, starch, gum, alginic acid or cyclodextrin
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00Cosmetics or similar toiletry preparations
    • A61K8/18Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/72Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
    • A61K8/73Polysaccharides
    • A61K8/731Cellulose; Quaternized cellulose derivatives
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61QSPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
    • A61Q5/00Preparations for care of the hair
    • A61Q5/06Preparations for styling the hair, e.g. by temporary shaping or colouring
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61QSPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
    • A61Q5/00Preparations for care of the hair
    • A61Q5/12Preparations containing hair conditioners
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/38Cationic compounds
    • C11D1/62Quaternary ammonium compounds
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D17/00Detergent materials or soaps characterised by their shape or physical properties
    • C11D17/0008Detergent materials or soaps characterised by their shape or physical properties aqueous liquid non soap compositions
    • C11D17/0013Liquid compositions with insoluble particles in suspension
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/0005Other compounding ingredients characterised by their effect
    • C11D3/001Softening compositions
    • C11D3/0015Softening compositions liquid

Definitions

  • Cationic surfactant-based products such as anti-bacterial surface cleaners, fabric softeners, skin conditioners, hair conditioners, conditioning shampoos, among others, are often difficult to thicken with conventional thickeners.
  • Many common thickeners such as xanthan gum, CMC (carboxymethylcellulose), carrageenan, and polyacrylates are anionic and therefore, can react with the cationic surfactants and cause precipitation of the cationic and thickener or reduce the efficacy of the cationic surfactant.
  • Non-ionic thickeners such as hydroxyethylcellulose (HEC), hydroxypropylmethylcellulose (HPMC), and scleroglucan can provide viscosity in cationic systems, however in the case of HEC and HPMC, very little suspension properties are imparted to the fluid. In the case of scleroglucan, good suspension is often achieved but cost-in use can be prohibitive.
  • Cationic thickeners such as polyquaternium 10 (cationic HEC) and cationic guar provide thickening in cationic systems but not suspension. Some forms of polyacrylates are effective at thickening cationic systems but they can be limited by pH, require high concentrations, have high cost-in-use, and often have narrow limits of compatibility with the cationic surfactants.
  • the suspension of particles is often desired and such particulates might include abrasive agents, aesthetic agents (decorative beads, pearlescents, air bubbles, fragrance beads, etc.) or active ingredients (insoluble enzymes, encapsulated actives such as moisturizers, zeolites, exfoliating agents (e.g. alpha hydroxyl and/or glycolic acids or polyethylene beads), vitamins (e.g. vitamin E)) etc. or both.
  • microfibrous cellulose MFC
  • bacterially derived or otherwise can be used to provide suspension of particulates in cationic systems. It was also discovered that the MFC may be used for this purpose with or without co-agents. When bacterially-derived microfibrous cellulose is utilized, cellular debris can be eliminated which can also result in transparent solutions at typical use levels with some formulations.
  • microfibrous cellulose is non-ionic and is therefore unaffected by the cationic surfactants and maintains good suspension in these systems.
  • Microfibrous cellulose is unique in its ability to function in these systems in part because it is dispersed rather than solubilized, thereby allowing its use in a wide range of pH and cationic surfactant concentrations without concern of precipitating the polymer due to “salting out” or other effects related to the competition for water.
  • Cationic surfactant systems comprising microfibrous cellulose are described. “Cationic systems” is intended to include but is not limited to cationic surfactants used in industrial and personal care applications for anti-microbial, fabric softening, and skin and hair conditioning.
  • Microfibrous cellulose includes MFC prepared by microbial fermentation or MFC prepared by mechanically disrupting/altering cereal, wood, or cotton-based cellulose fibers. When bacterially-derived microfibrous cellulose is utilized, cellular debris can be eliminated which results in transparent solutions at typical use levels.
  • the present invention utilizes MFC to provide suspension of particulates in formulations containing cationic surfactants.
  • the cationic surfactant concentration of these systems ranges from about 0.1% to about 50% (w/w active surfactant) wherein the specific concentration is product dependent.
  • Anti-bacterial household surface cleaners typically contain about 0.1% to about 4% (w/w) active cationic surfactant
  • hair and skin conditioners typically contain about 0.5% to about 3% cationic surfactants
  • fabric softeners typically contain about 3% to about 15% (w/w) cationic surfactant (with 15% being a “concentrated” fabric softener product).
  • Concentrates of the cationic surfactants can also be thickened for later dilution into formulated products. These concentrates can contain greater than 50% active cationic surfactant.
  • the MFC is present at concentrations from about 0.05% to about 1.0%, but the concentration will depend on the desired product. For example, while about 0.06% (w/w) MFC is preferred for suspending small alginate beads in a household cleaner containing 4% of the anti-bacterial cationic surfactant, benzylalkonium chloride, about 0.075% is preferred for suspending air bubbles in fabric softener.
  • Particulates to be suspended could include abrasive agents, aesthetic agents (decorative beads, pearlescents, air bubbles, fragrance beads, etc.) or active ingredients (insoluble enzymes, encapsulated actives such as moisturizers, zeolites, exfoliating agents (e.g. alpha hydroxyl and/or glycolic acids or polyethylene beads), vitamins (e.g. vitamin E) etc. or both.
  • abrasive agents aesthetic agents
  • active ingredients insoluble enzymes, encapsulated actives such as moisturizers, zeolites, exfoliating agents (e.g. alpha hydroxyl and/or glycolic acids or polyethylene beads), vitamins (e.g. vitamin E) etc. or both.
  • active ingredients insoluble enzymes, encapsulated actives such as moisturizers, zeolites, exfoliating agents (e.g. alpha hydroxyl and/or glycolic acids or polyethylene beads), vitamins (e.g. vitamin E) etc. or both.
  • suitable particulates would be apparent to one of
  • the invention is also directed to the use of co-agents and/or co-processing agents such as cationic HEC, cationic guar and/or guar gum with the microfibrous cellulose in the surfactant systems described herein.
  • Microfibrous cellulose blends are microfibrous cellulose products which contain co-agents. Four blends are described MFC, cationic guar, and guar in a ratio of 6:3:1, MFC and cationic guar in a ratio of 1:1 and 3:2 and MFC and cationic HEC in a ratio of 1:1. These blends allow MFC to be prepared as a dry product which can be “activated” with high shear or high extensional mixing into water or other water-based solutions.
  • Activation occurs when the MFC blends are added to water and the co-agents/co-processing agents are hydrated. After the hydration of the co-agents/co-processing agents, high shear is generally then needed to effectively disperse the microfibrous cellulose fibers to produce a three-dimensional functional network that exhibits a true yield point.
  • the invention is further directed to methods of making the cationic surfactant systems described, with or without co-agents and/or co-processing agents.
  • Example 1 A simplified anti-bacterial hard surface cleaner formulation demonstrating the cationic surfactant compatibility with 4% benzylalkonium chloride and suspension properties using a 0.15% MFC/cationic guar (1:1) blend are described in Example 1.
  • the cleaner exhibits the ability to suspend beads.
  • Example 2 describes a concentrated commercial liquid fabric softener with about 7.5% cationic surfactant and 0.15% MFC/cationic guar (1:1) blend and alginate suspended therein.
  • Example 4 A wet-cake form of microfibrous cellulose was used in Example 4 for preparing a high cationic surfactant system comprising a concentrated benzylalkonium solution.
  • the 40% benzylalkonium chloride and 0.06% active MFC solution exhibits the ability to suspend alginate beads and is described in Example 4.
  • Example 4 A wet-cake form of microfibrous cellulose was used in Example 4 for preparing a high cationic surfactant system comprising a concentrated benzylalkonium solution.
  • the 50% benzylalkonium chloride and 0.075% active MFC solution exhibits the ability to suspend air bubbles and is described in Example 5.
  • a simplified anti-bacterial hard surface cleaner containing 4% benzylalkonium chloride with suspended alginate beads was prepared.
  • the cleaner exhibited a measurable yield value and possessed the ability to suspend air bubbles and beads.
  • a yield value of 0.82 Pa (as measured with a Brookfield® Yield Rheometer) was obtained.
  • a concentrate was first prepared containing 0.3% microfibrous cellulose blend (MFC/cationic guar 1:1 blend) in deionized water. The concentrate was made by mixing the solution on an Oster® blender at “liquefy” (top speed) for 5 minutes. The microfibrous cellulose mixture was then diluted 1:1 with an 8% solution of benzylalkonium chloride.
  • the cationic solution was added to the microfibrous cellulose solution while mixing at about 600 rpm with a jiffy mixing blade.
  • Alginate beads were added to demonstrate suspension. Excellent suspension of air and/or alginate beads was achieved with no settling observed at room temperature or at 45° C. for 3 months.
  • the microfibrous cellulose diluted well notwithstanding the relative low shear of the jiffy or propeller mixing blade.
  • a concentrated commercial fabric softener containing about 7.5% cationic surfactant was prepared. “Downy® Clean BreezeTM ultra concentrated” liquid fabric softener was modified with MFC. A 0.3% microfibrous cellulose blend (MFC/cationic guar 1:1 blend) concentrate was activated in distilled water with an Oster® blender set at top speed (liquefy) by mixing for 5 minutes. The microfibrous cellulose solution was diluted 1:1 with Downy® ultra concentrated fabric softener while mixing at about 600 rpm with a jiffy mixing blade. Alginate beads were added to test suspension. Very good suspension of the beads was achieved for the dilution resulting in a yield point of 1.4 Pa (as measured with a Brookfield® Yield Rheometer). The fabric softener was put in a 45° C. oven to assess heat stability and showed excellent stability with no loss in suspension over 4 weeks of aging.
  • a conditioning hair spray with glitter suspended therein was prepared.
  • the resulting hair spray exhibited good spray characteristics and excellent suspension properties.
  • a yield value of about 0.2 Pa (as measured with a Brookfield® Yield Rheometer) was obtained.
  • Step A Deionizied water and disodium EDTA were added to a small Oster® mixing jar. Microfibrous cellulose (MFC/cationic guar 6:4 blend) was added to the top of the water and then the Oster® mixer blade was assembled and the combination was mixed at top speed for 5 minutes (“Liquify” speed).
  • MFC/cationic guar 6:4 blend Microfibrous cellulose
  • Step B STS and fragrance were mixed with pre-warmed RH-40 and propylene glycol and solubilized in the water phase.
  • Step C The remaining ingredients were added sequentially and mixed. The result was a low viscosity, sprayable hair conditioner with glitter suspended therein and a pH of 4.8.
  • High cationic surfactant systems were prepared having a 40% concentration of benzylalkonium chloride and the wet-cake version of microfibrous cellulose.
  • Alginate beads or air was suspended in the solutions.
  • a concentrate of 1.85% wet-cake microfibrous cellulose was activated in distilled water with an Oster® blender set at top speed (liquefy) by mixing for 5 minutes.
  • the microfibrous cellulose solution was diluted by 80% with a 50% benzylalkonium chloride solution while mixing at 600 rpm with a jiffy mixing blade.
  • Alginate beads were added to test suspension.
  • the activity (% solids) of this wet-cake form of MFC was about 16% yielding an active MFC level of 0.06% in the final solution. Upon visual inspection, good suspension was achieved for the dilution resulting in a yield point of 0.36 Pa (as measured with a Brookfield® Yield Rheometer).
  • High cationic surfactant systems were prepared having about 50% concentration of benzylalkonium chloride and the wet-cake version of microfibrous cellulose. Air was suspended in the solution. 0.47% wet-cake microfibrous cellulose was activated in a 50% concentrate of benzylalkonium chloride solution with an Oster® blender set at top speed (liquefy) by mixing for 5 minutes. The activity (% solids) of this wet-cake form of MFC was 16% yielding an active MFC level of 0.075% in the final solution. Upon visual inspection, good suspension of air was achieved for the dilution resulting in a yield point of 4.5 Pa. Clarity was very good with only a slight haze. cm 1 - 17 . (canceled)

Abstract

Cationic surfactant systems, using microfibrous cellulose to suspend particulates therein, are described. Methods of making these systems are also described.

Description

    BACKGROUND OF THE INVENTION
  • Cationic surfactant-based products such as anti-bacterial surface cleaners, fabric softeners, skin conditioners, hair conditioners, conditioning shampoos, among others, are often difficult to thicken with conventional thickeners. Many common thickeners such as xanthan gum, CMC (carboxymethylcellulose), carrageenan, and polyacrylates are anionic and therefore, can react with the cationic surfactants and cause precipitation of the cationic and thickener or reduce the efficacy of the cationic surfactant. Non-ionic thickeners such as hydroxyethylcellulose (HEC), hydroxypropylmethylcellulose (HPMC), and scleroglucan can provide viscosity in cationic systems, however in the case of HEC and HPMC, very little suspension properties are imparted to the fluid. In the case of scleroglucan, good suspension is often achieved but cost-in use can be prohibitive. Cationic thickeners such as polyquaternium 10 (cationic HEC) and cationic guar provide thickening in cationic systems but not suspension. Some forms of polyacrylates are effective at thickening cationic systems but they can be limited by pH, require high concentrations, have high cost-in-use, and often have narrow limits of compatibility with the cationic surfactants.
  • There is a need in industry to provide reliable suspension and viscosity to cationic surfactant systems. In these systems, the suspension of particles is often desired and such particulates might include abrasive agents, aesthetic agents (decorative beads, pearlescents, air bubbles, fragrance beads, etc.) or active ingredients (insoluble enzymes, encapsulated actives such as moisturizers, zeolites, exfoliating agents (e.g. alpha hydroxyl and/or glycolic acids or polyethylene beads), vitamins (e.g. vitamin E)) etc. or both.
  • It has been discovered that microfibrous cellulose (MFC), bacterially derived or otherwise, can be used to provide suspension of particulates in cationic systems. It was also discovered that the MFC may be used for this purpose with or without co-agents. When bacterially-derived microfibrous cellulose is utilized, cellular debris can be eliminated which can also result in transparent solutions at typical use levels with some formulations.
  • The microfibrous cellulose is non-ionic and is therefore unaffected by the cationic surfactants and maintains good suspension in these systems. Microfibrous cellulose is unique in its ability to function in these systems in part because it is dispersed rather than solubilized, thereby allowing its use in a wide range of pH and cationic surfactant concentrations without concern of precipitating the polymer due to “salting out” or other effects related to the competition for water.
  • BRIEF SUMMARY OF THE INVENTION
  • Cationic surfactant systems comprising microfibrous cellulose are described. “Cationic systems” is intended to include but is not limited to cationic surfactants used in industrial and personal care applications for anti-microbial, fabric softening, and skin and hair conditioning. Microfibrous cellulose (MFC) includes MFC prepared by microbial fermentation or MFC prepared by mechanically disrupting/altering cereal, wood, or cotton-based cellulose fibers. When bacterially-derived microfibrous cellulose is utilized, cellular debris can be eliminated which results in transparent solutions at typical use levels. The present invention utilizes MFC to provide suspension of particulates in formulations containing cationic surfactants.
  • The cationic surfactant concentration of these systems ranges from about 0.1% to about 50% (w/w active surfactant) wherein the specific concentration is product dependent. Anti-bacterial household surface cleaners typically contain about 0.1% to about 4% (w/w) active cationic surfactant, hair and skin conditioners typically contain about 0.5% to about 3% cationic surfactants, and fabric softeners typically contain about 3% to about 15% (w/w) cationic surfactant (with 15% being a “concentrated” fabric softener product). Concentrates of the cationic surfactants can also be thickened for later dilution into formulated products. These concentrates can contain greater than 50% active cationic surfactant.
  • The MFC is present at concentrations from about 0.05% to about 1.0%, but the concentration will depend on the desired product. For example, while about 0.06% (w/w) MFC is preferred for suspending small alginate beads in a household cleaner containing 4% of the anti-bacterial cationic surfactant, benzylalkonium chloride, about 0.075% is preferred for suspending air bubbles in fabric softener.
  • Particulates to be suspended could include abrasive agents, aesthetic agents (decorative beads, pearlescents, air bubbles, fragrance beads, etc.) or active ingredients (insoluble enzymes, encapsulated actives such as moisturizers, zeolites, exfoliating agents (e.g. alpha hydroxyl and/or glycolic acids or polyethylene beads), vitamins (e.g. vitamin E) etc. or both. Other suitable particulates would be apparent to one of skill in the art.
  • The invention is also directed to the use of co-agents and/or co-processing agents such as cationic HEC, cationic guar and/or guar gum with the microfibrous cellulose in the surfactant systems described herein. Microfibrous cellulose blends are microfibrous cellulose products which contain co-agents. Four blends are described MFC, cationic guar, and guar in a ratio of 6:3:1, MFC and cationic guar in a ratio of 1:1 and 3:2 and MFC and cationic HEC in a ratio of 1:1. These blends allow MFC to be prepared as a dry product which can be “activated” with high shear or high extensional mixing into water or other water-based solutions. “Activation” occurs when the MFC blends are added to water and the co-agents/co-processing agents are hydrated. After the hydration of the co-agents/co-processing agents, high shear is generally then needed to effectively disperse the microfibrous cellulose fibers to produce a three-dimensional functional network that exhibits a true yield point.
  • The invention is further directed to methods of making the cationic surfactant systems described, with or without co-agents and/or co-processing agents.
  • BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
  • The foregoing summary will be better understood when read in conjunction with the Detailed Description of the Invention.
  • DETAILED DESCRIPTION OF THE INVENTION
  • A simplified anti-bacterial hard surface cleaner formulation demonstrating the cationic surfactant compatibility with 4% benzylalkonium chloride and suspension properties using a 0.15% MFC/cationic guar (1:1) blend are described in Example 1. The cleaner exhibits the ability to suspend beads.
  • Example 2 describes a concentrated commercial liquid fabric softener with about 7.5% cationic surfactant and 0.15% MFC/cationic guar (1:1) blend and alginate suspended therein.
  • A conditioning hair spray containing cationic surfactant and a 0.125% MFC/cationic guar (6:4) blend. This product has suspended glitter and is described in Example 3.
  • A wet-cake form of microfibrous cellulose was used in Example 4 for preparing a high cationic surfactant system comprising a concentrated benzylalkonium solution. The 40% benzylalkonium chloride and 0.06% active MFC solution exhibits the ability to suspend alginate beads and is described in Example 4.
  • A wet-cake form of microfibrous cellulose was used in Example 4 for preparing a high cationic surfactant system comprising a concentrated benzylalkonium solution. The 50% benzylalkonium chloride and 0.075% active MFC solution exhibits the ability to suspend air bubbles and is described in Example 5.
  • EXAMPLE 1
  • A simplified anti-bacterial hard surface cleaner containing 4% benzylalkonium chloride with suspended alginate beads was prepared. The cleaner exhibited a measurable yield value and possessed the ability to suspend air bubbles and beads. A yield value of 0.82 Pa (as measured with a Brookfield® Yield Rheometer) was obtained. A concentrate was first prepared containing 0.3% microfibrous cellulose blend (MFC/cationic guar 1:1 blend) in deionized water. The concentrate was made by mixing the solution on an Oster® blender at “liquefy” (top speed) for 5 minutes. The microfibrous cellulose mixture was then diluted 1:1 with an 8% solution of benzylalkonium chloride. The cationic solution was added to the microfibrous cellulose solution while mixing at about 600 rpm with a jiffy mixing blade. Alginate beads were added to demonstrate suspension. Excellent suspension of air and/or alginate beads was achieved with no settling observed at room temperature or at 45° C. for 3 months. The microfibrous cellulose diluted well notwithstanding the relative low shear of the jiffy or propeller mixing blade.
  • EXAMPLE 2
  • A concentrated commercial fabric softener containing about 7.5% cationic surfactant was prepared. “Downy® Clean Breeze™ ultra concentrated” liquid fabric softener was modified with MFC. A 0.3% microfibrous cellulose blend (MFC/cationic guar 1:1 blend) concentrate was activated in distilled water with an Oster® blender set at top speed (liquefy) by mixing for 5 minutes. The microfibrous cellulose solution was diluted 1:1 with Downy® ultra concentrated fabric softener while mixing at about 600 rpm with a jiffy mixing blade. Alginate beads were added to test suspension. Very good suspension of the beads was achieved for the dilution resulting in a yield point of 1.4 Pa (as measured with a Brookfield® Yield Rheometer). The fabric softener was put in a 45° C. oven to assess heat stability and showed excellent stability with no loss in suspension over 4 weeks of aging.
  • EXAMPLE 3
  • A conditioning hair spray with glitter suspended therein was prepared. The resulting hair spray exhibited good spray characteristics and excellent suspension properties. A yield value of about 0.2 Pa (as measured with a Brookfield® Yield Rheometer) was obtained.
  • Step A: Deionizied water and disodium EDTA were added to a small Oster® mixing jar. Microfibrous cellulose (MFC/cationic guar 6:4 blend) was added to the top of the water and then the Oster® mixer blade was assembled and the combination was mixed at top speed for 5 minutes (“Liquify” speed).
  • Step B: STS and fragrance were mixed with pre-warmed RH-40 and propylene glycol and solubilized in the water phase.
  • Step C: The remaining ingredients were added sequentially and mixed. The result was a low viscosity, sprayable hair conditioner with glitter suspended therein and a pH of 4.8.
  • TABLE 1
    Sprayable Hair Conditioner with Suspension Properties
    Process
    Step Ingredient % (w/w) Grams
    A Deionized Water 93.725 374.9
    A Microfibrous Cellulose blend 0.125 0.5
    (MFC/cationic guar 6:4 blend)
    A Disodium EDTA 0.1 0.4
    B Fragrance To Suit
    B Crodamol STS 0.5 2
    B Cremophor RH 40 1.5 6
    B Propylene glycol 0.75 3
    C CTAC 29 1 4
    (29% Cetrimonium Chloride, a
    cationic conditioning agent)
    C Wheat Protein 1 4
    C Panthenol 0.2 0.8
    C Acetamide MEA 1 4
    C Kathon 0.1 0.4
    C Color To Suit To Suit
    C Glitter To Suit To Suit
    Totals 100.00 400.00
  • EXAMPLE 4
  • High cationic surfactant systems were prepared having a 40% concentration of benzylalkonium chloride and the wet-cake version of microfibrous cellulose. Alginate beads or air was suspended in the solutions. A concentrate of 1.85% wet-cake microfibrous cellulose was activated in distilled water with an Oster® blender set at top speed (liquefy) by mixing for 5 minutes. The microfibrous cellulose solution was diluted by 80% with a 50% benzylalkonium chloride solution while mixing at 600 rpm with a jiffy mixing blade. Alginate beads were added to test suspension. The activity (% solids) of this wet-cake form of MFC was about 16% yielding an active MFC level of 0.06% in the final solution. Upon visual inspection, good suspension was achieved for the dilution resulting in a yield point of 0.36 Pa (as measured with a Brookfield® Yield Rheometer).
  • EXAMPLE 5
  • High cationic surfactant systems were prepared having about 50% concentration of benzylalkonium chloride and the wet-cake version of microfibrous cellulose. Air was suspended in the solution. 0.47% wet-cake microfibrous cellulose was activated in a 50% concentrate of benzylalkonium chloride solution with an Oster® blender set at top speed (liquefy) by mixing for 5 minutes. The activity (% solids) of this wet-cake form of MFC was 16% yielding an active MFC level of 0.075% in the final solution. Upon visual inspection, good suspension of air was achieved for the dilution resulting in a yield point of 4.5 Pa. Clarity was very good with only a slight haze. cm 1-17. (canceled)

Claims (21)

18. An aqueous composition comprising a cationic surfactant system comprising (i) microfibrous cellulose at a concentration of about 0.05% to about 1.0% (w/w), (ii) at least one cationic surfactant at a concentration of about 0.05% to about 40% (w/w active surfactant), and (iii) a suspended particulate.
19. The composition of claim 18, wherein the microfibrous cellulose concentration is about 0.05% to about 0.09%.
20. The composition of claim 18, wherein the microfibrous cellulose concentration is about 0.05% to about 0.075%.
21. The composition of claim 18, wherein the cationic surfactant concentration is about 0.5% to about 3% (w/w active surfactant).
22. The composition of claim 18, wherein the cationic surfactant concentration is about 3% to about 15% (w/w active surfactant).
23. The composition of claim 18, wherein the composition is substantially transparent.
24. The composition of claim 18, wherein the microfibrous cellulose comprises a microfibrous cellulose blend of microfibrous cellulose, cationic guar, and guar at a ratio of 6:3:1.
25. The composition of claim 18, wherein the microfibrous cellulose comprises a microfibrous cellulose blend of microfibrous cellulose and cationic guar at a ratio of 1:1 or 3:2.
26. The composition of claim 18, wherein the microfibrous cellulose comprises a microfibrous cellulose blend of microfibrous cellulose and cationic hydroxyethylcellulose at a ratio of 1:1.
27. An aqueous composition comprising a cationic surfactant system comprising (i) microfibrous cellulose at a concentration of about 0.05% to about 1.0% (w/w), (ii) at least one cationic surfactant at a concentration of about 0.05% to about 40% (w/w active surfactant), and (iii) a suspended particulate, wherein the aqueous composition is prepared by a method comprising the steps of:
combining the microfibrous cellulose with water and mixing with high shear,
adding the cationic surfactant and then mixing, and
adding the particulate followed by mixing.
28. The composition of claim 27, wherein the microfibrous cellulose comprises a dry blend of microfibrous cellulose and one or more co-agents.
29. The composition of claim 28, wherein the microfibrous cellulose blend comprises microfibrous cellulose, cationic guar, and guar at a ratio of 6:3:1.
30. The composition of claim 28, wherein the microfibrous cellulose blend comprises microfibrous cellulose and cationic guar at a ratio of 1:1 or 3:2.
31. The composition of claim 28, wherein the microfibrous cellulose blend comprises microfibrous cellulose and cationic hydroxyethylcellulose at a ratio of 1:1.
32. The composition of claim 28, wherein the microfibrous cellulose comprises a wet cake of microfibrous cellulose and the cationic surfactant system is substantially free of co-agents.
33. Method of preparing an aqueous composition comprising a cationic surfactant system, comprising:
combining microfibrous cellulose with water and mixing with high shear,
adding cationic surfactant and then mixing, and
adding a particulate followed by mixing,
wherein the resulting system is clear and the particulates are suspended therein and wherein the microfibrous cellulose is present at a concentration of about 0.05% to about 0.1% (w/w) and the cationic surfactant is present at a concentration of about 0.05% to about 40% (w/w active surfactant).
34. The method of claim 33, wherein the microfibrous cellulose comprises a dry blend of microfibrous cellulose and one or more co-agents.
35. The method of claim 34, wherein the microfibrous cellulose blend comprises microfibrous cellulose, cationic guar, and guar at a ratio of 6:3:1.
36. The method of claim 34, wherein the microfibrous cellulose blend comprises microfibrous cellulose and cationic guar at a ratio of 1:1 or 3:2.
37. The method of claim 34, wherein the microfibrous cellulose blend comprises microfibrous cellulose and cationic hydroxyethylcellulose at a ratio of 1:1.
38. The method of claim 33, wherein the microfibrous cellulose comprises a wet cake of microfibrous cellulose and the cationic surfactant system is substantially free of co-agents.
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