Document 2RQ70mG588a6RkDgjyMKM5ob

FILE NAME: Colgate (COL) DATE: 1983 Oct 4 DOC#: COL042 DOCUMENT DESCRIPTION: US Patent - Ground Rice Hulls in Body Powders United States Patent [i9] Eigen et al. in ] 4, 407,789 [45] Oct. 4,1983 [54] GROUND RICE HULLS IN BODY POWDERS [75] Inventors: Edward Eigen, East Brunswick; Dina I. Brachman, Highland Park; Stuart D. Friedman, Bound Brook, all of N.J [73] Assignee: Colgate-Palmolive Company, New York, N.Y. [21] Appi. No : 321,874 [22] Filed Nov, 16, 1981 [51] Int. CU ... ................... A61K 7/46; A61K 7/021; A61K 7/32; A61K 7/035 [52] U.S. Cl..... ............................. 424/69; 252/522 R; 424/63; 424/65; 424/358 [58] Field of Search ...................... 424/69, 63, 65, 69; 252/522 [56] References Cited U.S. PATENT DOCUMENTS 415,351 11/1889 Quaglio .... . . 424/69 1,968,475 7/1934 Beckwith el al . 424/69 1,995,663 3/1935 Bollm ann et a l ............. 424/69 2,016,289 10/1935 McGill ................................. 252/167 FOREIGN PATENT DOCUMENTS 1141994 2/1969 United K in g d o m ................. 424/69 OTHER PUBLICATIONS Chem Abs., vol. 22, 11/1928, p. 4665, Scurti. Chem. Abs., vol. 22, 6/1928, p. 2415, Borasto. Martindale, The Extra Pharmacopoeia, 1943, 22nd Ed., vol. II, p. 738. Primary Examiner--Dale R. Ore Attorney, Agent, or Firm--Herbert S. Sylvester; Murray M Grill; John A. Stemwedel [57] ABSTRACT Novel high absorption body powder compositions com prising rice hulls ground to a particle fineness such that the material passes through a 200 mesh sieve, and pref erably passes through a 325 mesh sieve, as the basic and main powder constituent. II Claims, No Drawings 4, 407,789 1 2 GROUND RICE HULLS IN BODY POWDERS SUMMARY OF THE INVENTION The primary object of this invention is to provide a This invention relates to high moisture absorbent body powder composition of high absorbency compris body powder compositions having good texture and 5 ing finely divided rice hulls ground to a fineness such feel properties comprising around rice hulls of a size that the material passes through a 200 mesh sieve as the which pass a 200 mesh sieve as the base powder. base powder. All references to sieve sizes herein refer to BACKGROUND AND PRIOR ART the U.S. sieve series. Another object of this invention is to provide a body Rice hulls, a byproduct in the preparation of rice 10 powder composition of suitable texture and feel, con grains,has found many'uses. One particular use is as a taining up to 98% ground rice hulls which pass through cleaning scouring abrasive in mechanics' handsoaps, a 200 mesh sieve. wherein the rice hulls are ground to pass 20 mesh but Another object of this invention is to provide a natu not 100 mesh, in amounts of 10-25% by weight of the rally flesh colored body powder comprising finely di soap composition, as disclosed in chapter 12 page 331 of 15 vided rice hulls as the base powder. Rice Chemistry and Technology, Edited by D. F Hous Additional objects, advantages and novel features of ton, published by American Association of Cereal the invention will be set forth in part in the description Chemists, Inc., St. Paul, Minnesota, 1972. Another use which follows, and in part will become apparent to for finely ground hulls, described on page 332 of the those skilled in the art upon examination of the follow same book, is as a filler in plastics and plywood glues. 20 ing or may be learned by practice of the invention. The Still another use is as a carrier of adsorbent for materials objects and advantages of the invention may be realized ranging from vitamins to pesticides to explosives. How and attained by means of the instrumentalitie s and com ever, there is no disclosure of the use of finely ground binations particularly pointed out in the appended rice hulls as a powder base for body powders. claims. Talc, a natural hydrous magnesium silicate, is the 25 To achieve the foregoing and other objects and in major ingredient used today in body powders. How accordance with the present invention, as embodied and ever, talc has low water absorption properties and has broadly described herein, the highly absorbent body been found irritating to the tender skins of babies. Ac powder composition of this invention comprises finely cordingly, corn or rice starch has been substituted for 30 gasrotuhnedbarisceephouwlldsewr hich pass through a 200 mesh sieve talc as a dusting powder as shown in U.S. Pat. No. More specifically, present invention relates to a high 2,469,957 Handbook o f Cosmetic Materials, by Leon A. absorbent body powder composition having good tex Greenberg and David Lester (1954) pages 303 and 304 ture and feel properties comprising up to 98% by also describes the starches including rice starch and weight of ground rice hulls which pass through a 200 their uses in dusting powders and face powders, as well 35 mesh sieve as the powder base. Talc may be substituted as their possible adverse dermatological reactions. The for part of the ground rice hulls provided the properties use of rice starch in bath powders and face powders, as of this composition are not adversely affected. well as possible problems encountered therewith, is also It has been unexpectedly found that ground rice hulls disclosed in Cosmetics Science and Technology, Second which pass through a 200 mesh sieve can be effectively edition, Vol. 2, edited by M. S. Balsam and Edward 40 used as a substitute for talc in a body powder with the Sagarin (1957), pages 515 and 339. Riechstoffe Seifen feel and texture of talc, but with a greater capacity to Kosmetika by H. Janistyn, Vol. 1 (1950) page 372 also absorb moisture and sweat secretions. Dried ground discloses rice starch which is obtained from fragmented rice hulls absorbs moisture (16%), while talc absorbs rice, as a raw material for cosmetics. Starches generally, very little (0.5%). The fluid absorbency is determined and rice starch specifically, as a constituent of face 45 by placing a weighed amount of a dry sample of rice powder is disclosed in The Chemistry and Manufacture hulls or talc in a 90% humidity chamber until a constant o f Cosmetics by Maison G. de Navarre, (1981) page 337. weight is reached, and reweighing the fluid saturated Thus, it is apparent from the prior art that rice starch sample, the difference in weight constituting the % has been substituted for part or all of the talc in a body absorbency. The natural flesh color of said ground rice powder composition in order to eliminate some of the 50 hulls makes it particularly attractive as a powder base deficiencies of talc. However, additional problems have for face powders as well as dusting powders since it arisen from the use of starches as aforedescribed, and the major deficiency of insufficient moisture absor readily blends with the skin tone. Talc, on the other hand, leaves a white layer of powder unless pigmented. bency of said powders is still existent. The ground rice hulls is an asbestos-free natural product The prior art also discloses face powders containing 55 and considerably less costly than talc, making it a very small amounts of a special fraction of dehulled oat attractive substitute for talc in body powders Extracts groats ground to 60-70 mesh, in U.S. Pat. No. 2,436,818; of rice hulls have been reported as having antimicrobial and face powders containing large amounts of walnut activity in Cereal Food World January 1981, Vol. 26, shell flour as filler, in U.S. Pat. No. 4,279,890. No. 1, pages 19-25, thereby providing still another Although the prior art discloses rice starch which is 60 advantage in the use of ground rice hulls as the powder an extract from rice grains, and dehulled oat grains, and base in body powders. This inherent antimicrobial ac walnut shell flour as an ingredient in body powders, tivity may provide disinfectant properties and make there is no disclosure of rice hulls, a byproduct in the ground rice hulls potentially useful as a deodorant pow preparation of rice grains More specifically, rice grains der. All of these attributes makes ground rice hulls an are obtained by first dehulling and then debranning the 65 excellent substitute for talc or starch in body powder rice product. Finely ground rice hulls as the p o w d e r compositions base for high absorption body powder is the subject It is essential that the rice hulls be ground to a particle matter of this invention. size so that all particles pass through a 200 mesh sieve 4, 407,789 3 4 (less than 74/x), and preferably all particles pass through and other germicidal and antiseptic agents may be a 270 mesh sieve (less than 53p.) and most preferably all added in minor amounts, preferably not to exceed 5% particles pass through a 325 mesh sieve (less than 44p,). by weight of the composition. The particle size distribution is most preferably about 2 The high absorption body powder of the present to 40g with an average median size of about 11.5 to 19/x. 5 invention is generally prepared by intimately mixing the Particles which are returned on a 200 mesh sieve are not useful as a powder base because they impart a gritty feel finely ground rice hulls with the other dry ingredients until a homogeneous powdered mixture is obtained. and texture to the body powder. The rice hulls are The perfume oil may be premixed with the magnesium usually ground for about 48 hours in ball mills and carbonate prior to its admixture with the ground rice sieved for about 3 hours. However, other suitable means 10 hulls. and devices known in the art of grinding the rice hulls The body powder compositions of present invention can also be utilized provided the particles pass through include bath powder, foot powder, face powder, both a 200 mesh sieve screen. loose and compacted, and loose or compacted deodor The proportion of ground rice hulls when used as the ant and/or perfume powder products. sole base powder may be as high as 98% by weight of 15 the body powder composition. Amounts usually used DETAILED DESCRIPTION OF THE , are about 50% to 98% by weight. However, other con INVENTION ventional powders such as talc or starch may be substi The following examples are given to illustrate this tuted for part of the ground rice hull powder in amounts invention further. However, the examples should not be of less than 50% of the total base powder content. 20 construed as limiting the invention. Many variations are The present body powder compositions containing possible without departing from the scope of this inven ground rice hulls have all the attributes of a bath dusting tion. In this application all proportions are by weight powder, namely, spreads on easily, rubs in easily, ab unless otherwise indicated. sorbs on the skin readily, disappears on the skin quickly, skin feels smooth and soft after application, it's not 25 EXAMPLE 1 sticky and has good texture. In summation, the compo sition functions efficiently as a body powder It supplies Dusting Powder a lubricant which will absorb moisture and facilitate Ingredient c~ dressing. Instant body powder compositions may also be used 30 Ground Rice Hulls (particles pass a 325 mesh sieve) 97 6 as a face powder, both in loose or compacted form, Zinc stearate Magnesium carbonate 1 0 1.0 suitably tinted with pigments such as zinc oxide, tita Perfume 0 4 nium dioxide, the iron oxides, and the D & C Red, Yellow and Orange colors, and mixtures thereof. The perfume is premixed with the magnesium car Another essential ingredient in instant body powder 35 bonate, which is then dry mixed with the ground rice compositions is a binding agent for the powdered rice hulls and the zinc stearate. hulls which is preferably a metallic stearate such as zinc, aluminum or magnesium stearate, in amounts not to The resultant high absorbent powder, which is flesh colored (tan) has a good feel and texture. exceed 15% and preferably about 1-5% by weight for loose powders and about 5-15% for pressed or com 40 EXAMPLE 2 pacted powders. The presence of the stearate improves slip and flow properties of the product. However, minor amounts of other binders or mixtures of binders Dusting Powder may be used such as lanolin, mineral oil, pressed stearic Ingredient ___________________________ % acid, etc., particularly in the formulation of a com 45 Ground Rice Hulls (particles pass a 325 mesh sieve) 96 1 pacted face powder. Magnesium carbonate 1 0 Minor amounts of optional ingredients may be added PPererfsuemrveative 0 31 to the body powder compositions of present invention, Zinc stearate 1 0 including a fragrance or perfume oil; preservatives; Tncalcium phosphate 1 5 magnesium carbonate or kaolin which absorbs and dis 50 tributes the perfume oil in the powdered product and This high absorbent product has an apparent density generally functions as a perfume carrier. Tricalcium of 0.43 g/cc which is lighter than the apparent density phosphate may be added to provide anticaking proper of ground rice hulls alone (0.45 g/cc), has good texture ties and aid in the flow properties of the product. and feel. Density modifiers such as zinc oxide and calcium 55 carbonate to increase density, and Cabosil (fumed silica) EXAMPLE 3 or magnesium carbonate to decrease density may also be added. Similarly, opacifiers and pigments such as titanium dioxide, iron oxide may be added, especially in face powders. Emollients such as isopropyl myristate 60 Loose Face Powder Ingredient________________________ _________ ________ IS and other fatty acid esters may be added to formulate an emollient bath powder. The amount of each additive should not exceed about 15% by weight and preferably constitutes about 0.1-15% by weight of the total com Ground Rice Hulls (particles pass a 325mesh sieve) Zinc stearate Zinc oxide Magnesium carbonate 33J% Perfume in magnesium carbonate powder 54 55 500 15 00 500 7 5 position. 65 Germicidal or antiseptic compounds may be added to present body powder compositions such as quaternary 20% iron oxide in talc 20% D & C Red in talc 20% D & C Yellow in talc 12 5 005 0.40 ammonium salts, boric acid, salicylic acid, ichthammol 4,407,789 5 6 A brunette face powder is produced by dry mixing continued the above ingredients. The resulting face powder has a Pressed Face Powder good texture and feel Ingredient % EXAMPLE 4 5 20% D & C Yellow in talc 0 25 Perfume 0.5 Pressed Face Powder Binder 5.0 Loose Face Powder Ingredient % The ingredients are thoroughly mixed and com Ground Rice Hulls (particles passa 325 mesh sieve) Zinc stearate Zinc oxide Magnesium carbonate 33j% perfume in magnesium carbonate 20% D & C Red m talc 20% D & C Orange in talc 20% D & C Yellow in talc 65 63 10 500 1500 500 7 5 007 15 1 0 0 8 A lighter colored face powder, than in Example 3, is produced by dry mixing which has similarly good tex 20 ture and feel. The color can be further changed by the addition of various colored iron oxides and changing the percent ages of the various coloring ingredients. 25 EXAMPLE 5 Ingredient Pressed Face Powder Ground Rice Hulls (particles pass a 325 mesh sieve) Titanium dioxide Zinc stearate % 30 58 15 3 75 7.5 pressed into a container. This product is lighter m color than that of Example 5, and also spreads on easily, is not sticky, has good feel and texture. Other ingredients may be added to the above exam ples to modify the final product, such as density modifi ers to produce heavy or light body powders. Colors or pigments may be added to change the color of the fin ished product. Other stearates may be substituted for the zinc stearate in the above examples. It is understood that the foregoing detailed descrip tion is given merely by way of illustration and that variations may be made therein without departing from the spirit of the invention. The Abstract above is merely for the convenience of technical searchers and is not to be given any weight with respect to the scope of the invention. We claim: 1. A highly absorbent body powder composition consisting essentially of finely ground rice hulls which pass through a 200 mesh sieve as the base powder, in amounts up to 98% by weight of the composition and from 1 up to 15% by weight of the total composition of a suitable binding agent. 2. A body powder composition according to claim 1, Zinc oxide 0 2 wherein the ground rice hull particles pass thiough a Calcium carbonate 20% iron oxide m talc Perfume Pressed Face Powder Binder1 7 5 35 325 mesh sieve. 17.4 3. A body powder composition according to claim 1, 0 5 containing talc in an amount less than 50% of the 5 0 ground rice hull content. '25 868% in lanolin 59 477% mineral oil 10424% pressed stearic acid 3 861% cetyj aicoboJ 4. A body powder composition according to claim 1, 40 wherein the ground rice hulls is the sole base powder in an amount of about 50% to 98% by weight of the com 0 370% preservative position. 5. A body powder according to claim 1, wherein the The ingredients are thoroughly mixed and then com binding agent is a metallic stearate and is present in an pressed into a container. The resultant compact face 45 amount from about 1-15% by weight. powder spreads on easily, is not sticky, has good texture 6. A body powder according to claim 5, wherein the and fee). binding agent is selected from the group consisting of zinc, magnesium and aluminum stearate. EXAMPLE 6 7. A body powder according to claim 6, containing Ingredient Pressed Face Powder 50 about 0.1-15% by weight of a perfume and a perfume carrier. 8. A body powder according to claim 7, wherein the % perfume carrier is magnesium carbonate. Ground Rice Hulls (particles pass a 325 mesh sieve) Titantum dioxide Zinc stearate Ztnc oxide Calcium carbonate 20% iron oxide m talc 20% D & C Red in talc 20% D & C Orange in talc 74 875 9. A body powder according to claim 8, which is in 3.75 55 the form of a dusting powder. 7 50 10. A body powder according to claim 5, which is in 0 2 the form of a loose face powder. 7.5 11. A body powder according to claim 5, which is in 0 025 0 25 the form of a pressed face powder. 0 15 60 ***** 65