Source: http://www.google.com/patents/US4534962?dq=5754119
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Patent US4534962 - Sodium bicarbonate suspension as deodorant product - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign in<nobr>Advanced Patent Search</nobr>PatentsA novel stable pituitous bicarbonate suspension in an aqueous/alcoholic medium having a high alcohol content and a low water content, with substantially no bicarbonate in solution, containing hydroxyethyl cellulose as the essential suspending agent, said alcohol content exceeding the upper solubility...http://www.google.com/patents/US4534962?utm_source=gb-gplus-sharePatent US4534962 - Sodium bicarbonate suspension as deodorant productAdvanced Patent SearchPublication numberUS4534962 APublication typeGrantApplication numberUS 06/423,952Publication dateAug 13, 1985Filing dateSep 27, 1982Priority dateDec 29, 1980Fee statusPaidPublication number06423952, 423952, US 4534962 A, US 4534962A, US-A-4534962, US4534962 A, US4534962AInventorsFrank W. MarschnerOriginal AssigneeColgate-Palmolive CompanyExport CitationBiBTeX, EndNote, RefManPatent Citations (16), Non-Patent Citations (6), Referenced by (16), Classifications (20), Legal Events (4) External Links: USPTO, USPTO Assignment, EspacenetSodium bicarbonate suspension as deodorant productUS 4534962 AAbstract A novel stable pituitous bicarbonate suspension in an aqueous/alcoholic medium having a high alcohol content and a low water content, with substantially no bicarbonate in solution, containing hydroxyethyl cellulose as the essential suspending agent, said alcohol content exceeding the upper solubility of hydroxyethyl cellulose in said alcohol and the water content being sufficient to prevent precipitation of said suspending agent and at least 5% by weight; having utility in deodorant products such as roll-ons, pumps and on substrates such as deodorant pads. The concentration of sodium or potassium bicarbonate is preferably high, about 10%, however 1-20% may be used. The alcohol utilized herein is monohydric such as ethanol, methyl or isopropyl alcohol, however, a polyhydric alcohol such as propylene glycol, glycerine and/or polypropylene glycols may be partially substituted for the monohydric alcohol. The bicarbonate suspensions have been found to be less irritating to the body and dry faster than the bicarbonate solutions because the bicarbonate is delivered as a powder to be activated by body moisture.
I claim: 1. A fast-drying, stable viscous pituitous deodorant suspension comprising about 1-20% alkali metal bicarbonate particles uniformly suspended in a vehicle with substantially no bicarbonate in solution, comprising a high alcohol content of lower aliphatic monohydric alcohol and a low water content and hydroxyethyl cellulose suspending agent in an amount above its alcohol solubility and within the range of about 0.1-1%, said monohydric alcohol content exceeding the upper solubility level for the water soluble hydroxyethyl cellulose in said alcohol and within the range of about 55-75%, and the water content being sufficient to prevent precipitation of said suspending agent and at least 5%, if at least 10% polyhydric alcohol is also present in the suspension, and up to about 25% by weight.
8. The method of making the viscous pituitous suspension of claim 1, which comprises preparing a clear viscous aqueous or aqueous alcoholic solution of hydroxyethyl cellulose heated to a temperature of about 130�-140� F., mixing this heated viscous solution with a monohydric alcoholic dispersion of the bicarbonate until a viscous pituitous suspension is formed with the bicarbonate particles uniformly suspended therein.
BACKGROUND AND PRIOR ART Sodium bicarbonate has long been recognized for its deodorant properties, and has commonly been used as a deodorant in refrigerators. In addition, plain powdered sodium bicarbonate or diluted with talc, cornstarch, rice-flour, or other filler has been used as an underarm deodorant as disclosed in the Journal of Investigative Dermatology Vol. 71946 pages 131-133 and U.S. Pat. No. 279,195 and No. 1,558,405.
SUMMARY OF THE INVENTION The primary object of the invention is to solve existing disadvantages by providing a novel stable alcoholic aqueous pituitous bicarbonate suspension containing hydroxyethyl cellulose as the essential suspending agent which maintains said bicarbonate particles uniformly dispersed and suspended in said high alcohol, low water content media, and requires little or no shaking prior to use.
Skin irritation problems experienced with bicarbonate solutions can be explained as bicarbonate instability and its conversion into an irritating carbonate salt. Three products were made using 5% sodium bicarbonate as follows and examined for pH over a short aging period at 120� F.
______________________________________     A      B           C     Water  Water/Alcohol                        Alcohol/Water     Soln.  Soln.       Suspension______________________________________Distilled Water       95.0     80.0        15.0Sodium Bicarbonate       5.0      5.0         5.0SD 40 Ethanol       --       15.0        79.6Hydroxyethyl       --       --          0.4Cellulose   100.0    100.0       100.00     pH (1:9 Parts Distilled Water)Initial pH  8.6      8.7         8.62(After Making)4 days at 120� F.       9.5      9.5         8.617 days at 120� F.       9.9      9.9         8.6______________________________________
Formula (b) British Patent Specification No. 1,553,739 likewise showed pH instability at 120� F. and at ambient temperature.
______________________________________Natrosol 250 HR (hydroxyethyl                 4.0cellulose)Procetyl AWS (propoxylated                 3.0cetyl alcohol)Sodium Bicarbonate    1.0Ethanol (SD 40)       45.0Distilled Water       47.0                 100.0pH (1:10 Parts Distilled Water)Initial pH (after making)                 8.8124 hours later       --Ambient Temperature   9.4120� F.        9.95______________________________________
However, it has been found that hydroxyethyl cellulose, which is a water soluble polymer, provides unique suspending properties to alkali metal bicarbonate in aqueous/high alcohol media. Although, hydroxyethyl cellulose is normally considered a thickener for aqueous type systems, it has been found to have unusual suspending properties in high alcohol/aqueous systems. Such suspensions are stringy and pituitous and offer superb suspending properties. This suspending agent gives exceptionally stable pituitous suspensions with no bicarbonate segregation after two weeks at 40� F., ambient or 110� F. temperature conditions, and require no shaking before use. This unexpected property of forming a stable pituitous bicarbonate suspension in a high alcohol/low water containing media is not possessed by other cellulosic derivatives such as hydroxypropyl cellulose, sodium carboxymethyl cellulose, hydroxypropylmethyl cellulose (Methocel) and other water soluble polymers.
The method of making the stable pituitous bicarbonate suspensions of instant invention generally comprises combining a heated aqueous or aqueous/monohydric or polyhydric alcohol mixture containing hydroxyethyl cellulose suspending agent with a monohydric alcoholic dispersion of alkali metal bicarbonate which may contain a second suspending agent, and mixing until a thick stable pituitous, stringy suspension is formed. More specifically, a clear Part 1 viscous solution of hydroxyethyl cellulose is prepared by heating and mixing with water or a water containing mixture of monohydric or polyhydric alcohol to a temperature of about 130�-140� F. A Part 2 preferably homogenized dispersion of alkali metal bicarbonate in a monohydric alcohol with or without a suspending agent is added with mixing to Part 1 viscous mixture to form a thick uniform, pituitous, stringy suspension wherein the solid particles of bicarbonate are uniformly suspended and remain in suspension. The perfume, colorants, emollients and other optional ingredients may be added to the alcoholic bicarbonate dispersion prior to its addition to the aqueous/alcoholic viscous hydroxyethyl cellulose solution, or subsequent thereto. The final suspension as well as each of the two dispersions independently, is preferably homogenized to effect a homogeneous final thick, pituitous suspension product.
Another method of making the stable pituitous bicarbonate suspensions comprises the sequential addition of the ingredients to a heated solution (about 140� F.) of water and alcohol, with agitation and/or homogenization. More specifically, the hydroxyethyl cellulose is added to the warm aqueous/alcoholic solution, followed by the monohydric alcohol followed by another suspending agent is desired, followed by the bicarbonate, followed by the perfume, color and any other optional ingredient. This method yields a thinner suspension than when utilizing the aforementioned two part method. Either method however, requires the initial preparation of a viscous aqueous containing hydroxyethyl cellulose solution prior to the addition of final amounts of monohydric alcohol. Accordingly, the order of addition and the preparation methods are important in achieving the desired pituitous suspension.
DETAILED DESCRIPTION OF THE INVENTION The following specific examples are further illustrative of the present invention, but it is understood that the invention is not limited thereto. All amounts of various ingredients are by weight unless otherwise specified.
EXAMPLES 1-4 ______________________________________    1      2        3        4______________________________________Part IDeionized Water      15.00    15.00    5.00   15.00Propylene Glycol      --       10.00    10.00  --SD 40 Ethanol      10.00    --       --     15.00Natrosol 250      0.40     0.40     0.40   0.40HR.sup.(1)Part IISD 40 Ethanol      63.15    60.65    70.65  56.10Cab-O-Sil.sup.(2)      0.50     0.50     0.50   0.50Sodium Bi- 10.00    10.00    10.00  5.00carbonate(Micropulverized)Zinc Ricinoleate      --       --       --     5.00Part IIIPerfume    0.50     0.50     0.50   0.50FD &amp; C Green      0.30     0.30     0.30   --No. 3 (.1%)D &amp; C Green      0.15     0.15     0.15   --No. 8 (2.75%)Arlemol E.sup.(3)      --       1.50     1.50   1.50Wickenol 535.sup.(4)      --       1.00     1.00   1.00      100.0    100.0    100.0  100.0pH 1% aqueous      8.45     --       --     7.8SolutionAppearance Thick,   Thick,   Thick, Lotion-consis-      viscous  viscous  viscous                               tency pituit-      pituitous               pituitous                        pituitous                               ous suspen-      suspension               suspen.  suspen.                               sion______________________________________ .sup.(1) Natrosol 250 HR: Hercules Inc., Hydroxyethyl Cellulose .sup.(2) CabO-Sil: Cabot Corporation, Fumed Silica .sup.(3) Arlemol E: I.C.I. American Inc., Polyoxypropylene Stearyl Ether .sup.(4) Wickenol 535: Wickhen Products Inc., Wheat Germ Glycerides
Aging tests over a period of two weeks at room temperature, 40� F. and 110� F. showed no bicarbonate segregation.
PREPARATION OF EXAMPLES Step 1
Disperse Natrosol in either Ethanol or Propylene Glycol. Add water with constant mixing and heat to 130�-140� F. until a uniform clear viscous solution is formed.
Step 2 Part 2 (Example 1-3)
Step 3 Add Part 2 to Part 1 with mixing (thick pituitous stringy suspension is formed).
Step 4 Part 3
EXAMPLE 5 ______________________________________Ingredient             %______________________________________Propylene Glycol       10.0Bentone Lt.sup.(1)     0.5Deionized Water        15.0Sodium Bicarbonate Micropulverized                  10.0SD 40 Ethanol          64.5                  100.0______________________________________ .sup.(1) Bentone LT: NL Industries Gellant is an organoclay material product designed for low molecular weight polar solvent/water systems and 100% water systems. It is a combination of hydroxyethyl cellulose and bentonite clay.
PREPARATION OF EXAMPLE 5 1. Disperse Bentone LT in Propylene Glycol
2. Add water, mix and heat to 130�-140� F. until uniformly viscous.
EXAMPLE 6 Example 2 is repeated except that the stearyl ether and wheat germ glycerides are omitted and the ethanol content is increased to 63.15%. This product yields a stable uniform pituitous suspension of high viscosity from which the bicarbonate particles do not separate out upon standing but remain in suspension. This product, used in a roll-on container with a one-inch ball, gave good delivery and fast drying properties to form an invisible film on the skin.
EXAMPLES 7 AND 8 ______________________________________Ingredient       Example 7    Example 8______________________________________Water            37.65        37.65Propylene Glycol 10.0         10.0Natrosol 250 HR  0.4          0.9Ethanol          37.65        37.65NaHCO3 Micropulverized            10.0         10.0Cab-O-Sil        0.5          --FDC Blue No. 1 (.1%)            0.3          0.3Perfume          0.5          0.5D &amp; C Yellow No. 11 (.1%            3.0          3.0alcohol)            100.0        100.0Appearance       Not stringy in                         Very viscous            consistency  not stringy            Bicarbonate sep-                         Unstable            arated overnight                         suspension______________________________________
EXAMPLE 9 Example 2 is repeated except that the ethanol content is reduced to 60.40% and 0.05 Uvinul (ultraviolet absorber, 2,4 dihydroxy benzophenone) is added and the colors are replaced by 0.35% FDC Blue No. 1 (0.1% aqueous solution) and 0.3% D & C Yellow No. 10 (1.0% aqueous solution). This suspension is prepared in accordance with the procedure of Example 2 except that the Arlemol and Wickenol are preblended and heated and then added to the combination of Part 1 and 2, followed by the addition of the perfume, colors and brightener. This product is a viscous stable pituitous, stringy suspension with fast drying properties.
EXAMPLE 10 ______________________________________Part 115.0            Distilled Water10.0            Propylene Glycol0.4             Natrosol 250 HRPart II57.8            Ethanol10.0            NaHCO3Part III1.0             Wickenol1.5             Arlemol E0.3             FDC Blue No. 13.0             D &amp; C Yellow No. 110.5             Perfume99.5______________________________________
EXAMPLE 11 The composition of Example 10 was prepared in a sequential manner so that the bicarbonate is added to the water prior to the suspending agent as follows:
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS74871 *Feb 25, 1868 wilsonUS279195 *Dec 26, 1882Jun 12, 1883 Deodorizing perspiration-powderUS1558405 *Mar 6, 1924Oct 20, 1925Smith Arthur GDeodorant compositionUS2145583 *Dec 6, 1934Jan 31, 1939Victor H RoehrichAntisudorific deodorizing shaving creamUS2373933 *Aug 31, 1942Apr 17, 1945Armand CompanyCosmetic preparationUS2602042 *Aug 16, 1947Jul 1, 1952Inez M AbbottProcessing methyl cellulose and the products thereofUS3152181 *Jan 18, 1961Oct 6, 1964Us Vitamin Pharm CorpAlkoxypropylene biguanidesUS3485915 *Apr 22, 1966Dec 23, 1969RevlonThickened hydroxypropyl cellulose compositionsUS4126679 *Jan 6, 1977Nov 21, 1978Armour-Dial, Inc.Powder, aliphatic alcohol, polydimethylcyclosiloxane or polydimethylsiloxaneDE968469C *Dec 15, 1940Feb 20, 1958Dr Phil Werner PinkauVerfahren zur Herstellung von Koerperreinigungs- und KoerperpflegemittelnFR762847A * Title not availableFR1187607A * Title not availableFR1236071A * Title not availableGB908308A * Title not availableGB191226987A * Title not availableIT406561A * Title not available* Cited by examinerNon-Patent CitationsReference1 *Amer. Perfumes & Cosmetics, 10/1963, vol. 78, pp. 95 97.2Amer. Perfumes & Cosmetics, 10/1963, vol. 78, pp. 95-97.3 *Ash, A Formulary of Cosmetic Preparations, 1977, pp. 6, 11, 13, 14, 20, 24 and 25.4 *Martindale, The Extra Pharmacopoeia, pp. 1705 1708, 1972.5Martindale, The Extra Pharmacopoeia, pp. 1705-1708, 1972.6 *Pharmaceutical Formulas, 1947, vol. II, p. 152.* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS4740366 *Jan 21, 1986Apr 26, 1988Church & Dwight Co., Inc.Aerosol spray; deodorizing agent reacts with malodorUS4851212 *Dec 23, 1987Jul 25, 1989Church & Dwight Co. Inc.Air deodorizer composition and methodUS5037412 *Oct 27, 1989Aug 6, 1991Kimberly-Clark CorporationAbsorbent article containing an anhydrous deodorantUS5330749 *Aug 31, 1993Jul 19, 1994Church & Dwight Co., Inc.Liquid mouthwash containing a particulate bicarbonate suspensionUS5342333 *Feb 18, 1993Aug 30, 1994Kimberly-Clark CorporationAbsorbent article containing an anhydrous deodorantUS5364380 *Apr 11, 1994Nov 15, 1994Kimberly-Clark CorporationFor retention of human exudateUS5368848 *Aug 27, 1992Nov 29, 1994Bristol-Myers Squibb CompanyCosmetic gel stick compositionsUS5455023 *Mar 30, 1994Oct 3, 1995Church & Dwight Co., Inc.Liquid mouthwash containing a particulate bicarbonate suspensionUS5800805 *Jun 19, 1997Sep 1, 1998Church & Dwight Co., IncAerosol deodorant productUS5863524 *Mar 26, 1997Jan 26, 1999Church & Dwight Co., Inc.Including a polyamine clarifier with an alkali metal bicarbonate or carbonate, a polyhydric alcohol, a fatty acid salt and water; stability; feelUS5945085 *Jun 19, 1997Aug 31, 1999Church & Dwight Co., Inc.Consists of sodium bicarbonate as primary ingredient, antiperspirant astringent salt, volatile silicon oil, carboxylate ester emollient, clay as hydrophobic suspending agentUS6743418Mar 5, 2002Jun 1, 2004Barbara BufordDeodorant pad systemUS7736632Feb 20, 2008Jun 15, 2010Gorman Cynthia Delaneyunrefined Shea butter, sodium bicarbonate, corn starch, cocoa butter, coconut oil, lavender oil, Clary sage oil, benzoin gum tincture and vitamin E; controls body odor and minimizes skin irritation; free of harsh chemicals and petroleum by-productsEP1210932A2 *Nov 22, 2001Jun 5, 2002Henkel Kommanditgesellschaft auf AktienPropellant free sprays compositionsEP1291011A1 *Jun 23, 2000Mar 12, 2003Svetlana Igorevna UspenskayaHand treatment lotionWO2002074044A2 *Mar 13, 2002Sep 26, 2002Asesoria En Calidad J L SerraAqueous deodorant solution and applications thereof* Cited by examinerClassifications U.S. Classification424/65, 514/781, 514/770International ClassificationA61K8/73, A61K47/38, A61Q15/00, A61K47/10, A61K8/19Cooperative ClassificationA61Q15/00, A61K8/19, A61K47/38, A61K8/731, A61K9/0014, A61K47/10European ClassificationA61K8/19, A61K8/73C, A61Q15/00, A61K47/10, A61K9/00M3, A61K47/38Legal EventsDateCodeEventDescriptionFeb 3, 1997FPAYFee paymentYear of fee payment: 12Feb 8, 1993FPAYFee paymentYear of fee payment: 8Feb 1, 1989FPAYFee paymentYear of fee payment: 4May 6, 1985ASAssignmentOwner name: COLGATE-PALMOLIVE COMPANY, 300 PARK AVE., NEW YORKFree format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:MARSCHNER, FRANK W.;REEL/FRAME:004395/0708Effective date: 19801222RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google