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Publication numberUS2856330 A
Publication typeGrant
Publication dateOct 14, 1958
Filing dateNov 8, 1954
Priority dateNov 8, 1954
Publication numberUS 2856330 A, US 2856330A, US-A-2856330, US2856330 A, US2856330A
InventorsVagenius Harold N
Original AssigneeVagenius Harold N
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Method of treating cotton fabrics
US 2856330 A
Abstract  available in
Images(2)
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Claims  available in
Description  (OCR text may contain errors)

United States Patent METHOD OF TREATING COTTON FABRICS Harold N. Vagenius, Chicago, Ill.

No Drawing. Application Novemberfitl, 1954 Serial No. 467,658

4 Claims. (Cl. 167- 84) This inventionrelates to methods of treating cotton fabrics for preventing or delaying the development of unpleasant odors and/or a rise in pH value when the treated fabrics are exposed to or impregnated with body secretions such as perspiration or urine. The methods of this invention are particularly applicable to the treatment of diapers for the indicated purpose.

The methods of this ivention involve dipping or submerging cotton fabrics in dilute water solutions of copper salts. However, such treatment of cotton fabrics ordinarily or often causes the fabrics to be tinted green, especially in the presence of small amounts of colloidal materials such as soaps, gums, starches, proteins such as albumen or casein and other colloidal material used in washing or treating fabrics and apt to remain in the fabrics after Washing or treatment therewith. Further, dipping or submerging cotton fabrics in dilute water solutions of copper salts often render the fabrics water repellent.

It is, therefore, an object of the present invention to provide methods for treating cotton fabrics with dilute water solutions of copper salts without tinting the fabrics green or rendering the fabrics water repellent, even when the fabrics or the dipping solution of the copper salts contain colloidal materials such as soap.

According to the present invention, cotton fabrics are immersed in water solutions of a water soluble copper salt such as copper sulfate, chloride, acetate or nitrate. From about 0.05 to about 1 milligram molecules (an amount in milligrams numerically equal to the molecular weight) of copper salt are used for each 60 grams of cotton fabric. This amount of copper salt is dissolved in from 100 cc. to 1000 cc. or more of water. Further, from about 2 to about 10 milligram molecules of disodium dihydrogcn pyrophosphate are added to the solution for each milligram molecule of copper salt. dipping solution is kept acid, preferably at a pH of from about 3.0 to 3.5 to about 5 or 6. The time of immersion may be from 1 or 2 minutes up to or minutes or longer, but is not critical. The immersion may be carried out at room temperature or at elevated temperatures for instance 120 F., or 140 F. or 160 F.

The above mentioned pH range is most suitably maintained by adding to the dipping solution appropriate amounts of acidic substances such as zinc or magnesium silicofluoride, acetic acid, lactic acid, hydrochloric acid, sulfuric acid and the like. In place of the disodium dihydrogen pyrophosphate, equivalent amounts of tetrasodium pyrophosphate may be used, but then an additional amount of an acidic substance is added to neutralize one half of the sodium content of the tetrasodium pyrophosphate. In place of the sodium pyrophosphate, other alkali metal pyrophosphates may be used, such as the corresponding potassium pyrophosphates.

For convenience in making up the dipping solution, mixtures may be prepared comprising a finely divided copper salt and finely divided disodium dihydrogen pyrophosphate in a ratio of one molecule of copper salt to two Also, the pH of the to 10 molecules of said pyrophospnate. To insure proper acidity of the dipping solution, even in the presence of soaps, such mixtures may additionally comprise from one-half to two or more molecules of zinc or magnesium silicofluoride or equivalent acidic buffers for each molecule of said copper salt.

When cotton fabrics are treated as described in the preceding paragraph, then rinsedwith water and dried, the fabrics are not rendered water repellent, nor are the fabrics tinted green, even when the fabrics (or the dipping solutions) contain even fairly large amounts of colloidal materials such as soaps, fats, oils, proteins such as albumen or casein, dirt or soil and the like. Further, cotton fabrics so treated contain copper substantively fixed thereon, Which copper is not removed by wetting or rinsing with water or expo-sure to body secretions such as perspiration or urine. Further, fabrics so treated do not develop unpleasant odors and/ or a rise in pH value and/ or formation of ammonia when the treated fabrics are exposed to or impregnated with body secretions such as perspiration and urine.

Examples of treatments of 60 gram cotton diapers according to the present invention are given hereinbelow.

For each of these examples, one 60 gram cotton diaper was first wetted with 150 to 180 cc. water having .2 gram of ordinary soap dissolved therein, thereafter immersed for from three to ten minutes in a copper salt solution containing disodium dihydrogen pyrophosphate, then removed from the copper salt solution, squeezed thoroughly, rinsed with water and dried. The copper salts employed were the sulfate, chloride, acetate and nitrate. The pH was adjusted downward-1y with an appropriate amount of zinc silicofluoride. The exact amounts of copper salts, pyrophosphate, water and the pH are tabulated as follows:

i Milligram i i Milligram Example No. Copper Molecules Water, Molecules pH Salt of copper cc. of pyrosalt phosphate Sulfate. 0.05 250 1 5. 0 0.1 250 .2 4. 5 0.1 .3 4. 5 0.1 250 .4 3. 5 0. .3 350 2. 0 3. 5 l. 0 450 5. 0 3. 5 1. 5 550 10.0 3. 5 0.1 250 0.3 3. 5 0.] 250 0.3 3. 5 10 Nitrate... 0.1 250 0.3 3. 5

An untreated diaper and each one of diapers Numbers 1 through 10 of the above table was impregnated with cc. urine and placed in a polyethylene bag, which was kept at room temperature for sixdays. The control (untreated) diaper developed an unpleasant sour odor within 24 hours followed shortly thereafter by a rise in pH and generation of ammonia. in the case of diapers of Examples 1 through 10, such odor and rise in pH value did not take place before four or five days, and generation of ammonia did not occur at all.

Many details may be varied without departing from the principles of this invention. It is therefore not my intention to limit the patent granted on this invention otherwise than necessitated by the scope of the appended claims.

'Iclairn:

1. A method of treating cotton fabrics which comprises immersing said fabrics in a dilute acidic aqueous solution of a water soluble copper salt selected from the group consisting of the sulfate, chloride, nitrate and acetate, said solution containing, for each 60 grams of fabric, from about to about 1000 cc. of Water, from about 0.05 to about 1 milligram molecules of a soluble copper salt, and from about 2 to about 10 milligram molecules of a di-alkali metal dihydrogen pyrophosphate for each milligram molecule of said copper salt said solution being maintained at a pH of from about 3 to about 6.

2. A method according to claim 1 in which said pyrophosphate is a sodium pyrophosphate.

3. A method according to claim 1 in which said copper salt is copper sulfate.

4. As a new composition of matter, a mixture comprising a water soluble copper salt selected from the group consisting of the sulfate, chloride, nitrate and acetate and disodium dihydrogen pyrophosphate in a ratio of one molecule of said copper salt to from two to ten molecules of said pyrophosphate.

References Cited in the file of this patent UNITED STATES PATENTS 22,362 Glynn Dec. 21, 1858 43,233 Stacey June 21, 1864 152,903 Gender July 14, 1874 1,903,041 Hall et a1. Mar. 28, 1933 1,960,627 Finlayson May 29, 1934 2,086,867 Hall July 13, 1937 2,241,580 Bishop May 13, 1941 2,580,286 Dorsett Dec. 25, 1951 2,643,969 Mahon June 30, 1953 FOREIGN PATENTS 453,348 France Apr. 2, 1913 OTHER REFERENCES 15 and Eng. Chem., April 1941, pp. 538-545.

Fullerton: Cotton Duck and Canvas, Rot-proofing, J. Text. Inst, 1942, p. A321.

Textile Colorist, January 1943, p. 30.

Goodman: Cosmetic Dermatology, McGraw Hil 20 Book Co., 1936, p. 45, entry Cupric Sulfas.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US22362 *Dec 21, 1858 Improvement in medicated fabrics
US43233 *Jun 21, 1864 Improved mode of preventing mildew in canvas, cloth
US152903 *Jun 5, 1874Jul 14, 1874 Improvement in treating textile fabrics to prevent mildew and decay
US1903041 *Nov 23, 1929Mar 28, 1933John M HopwoodWater treatment
US1960627 *Oct 28, 1932May 29, 1934Sealth CorpMethod for retarding the decay of fishing twine, nets, and allied equipment
US2086867 *Jun 19, 1936Jul 13, 1937Hall Lab IncLaundering composition and process
US2241580 *Jun 25, 1937May 13, 1941Pennsylvania Salt Mfg CoArt of laundering and cleaning
US2580286 *Dec 4, 1946Dec 25, 1951Dorsett Rowell RProcess of treating cellulosic and similar materials
US2643969 *Apr 17, 1947Jun 30, 1953Homemakers Products CorpDiaper
FR453348A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2904466 *Sep 6, 1956Sep 15, 1959Monsanto ChemicalsPreservative composition comprising tetraalkali metal pyrophosphate, a polychlorophenate and a heavy metal salt
US3067745 *Aug 12, 1959Dec 11, 1962Johnson & JohnsonAbsorbent product
US3072534 *Feb 21, 1958Jan 8, 1963American Cyanamid CoDurable antibacterial textile finish for cellulosic fibers
US3101297 *May 15, 1961Aug 20, 1963Sir Properties IncDiaper washing composition
US3379563 *Sep 8, 1964Apr 23, 1968Armour & CoImpregnated degradationresistant cloth
US4385632 *Sep 14, 1981May 31, 1983Landstingens InkopscentralGermicidal absorbent body
US4525410 *Aug 24, 1983Jun 25, 1985Kanebo, Ltd.Particle-packed fiber article having antibacterial property
US4556560 *Jan 24, 1983Dec 3, 1985The Procter & Gamble CompanyMethods for the treatment and prophylaxis of diaper rash and diaper dermatitis
US4637820 *Mar 4, 1985Jan 20, 1987Lenzing AktiengesellschaftCopper-modified carboxyalkyl-cellulose fiber
US4661101 *May 15, 1985Apr 28, 1987Vereinigte Papierwerke, Schickedanz & Co.Layered catamenial device
US4675014 *Mar 4, 1985Jun 23, 1987Henkel Kommanditgesellschaft Auf AktienMicrobistatic and deodorizing catamenial and hygienic devices
US4906462 *Nov 10, 1987Mar 6, 1990Nippon Zeon Co., Ltd.Deodorant composition and deodorant composite material
US4956183 *Aug 6, 1987Sep 11, 1990Nippon Zeon Co., Ltd.Composition comprising copper compound
US4983441 *Aug 23, 1989Jan 8, 1991Nippon Zeon Co., Ltd.Deodorant composition and deodorant composite material
US5492759 *Sep 27, 1990Feb 20, 1996Molnlycke AbFibres of increased specific surface area, a method for their manufacture, fluff pulp consisting of such fibres and the use of the fibres as absorption material
US5833970 *May 29, 1992Nov 10, 1998Cox; James P.Deodorant material and deodorizing method
DE3135410A1 *Sep 7, 1981Jun 24, 1982Landstingens InkopscentralKleimtoetender absorbierender koerper
EP0117613A2 *Jan 23, 1984Sep 5, 1984THE PROCTER & GAMBLE COMPANYDisposable absorbent article incorporating agents for the treatment and prophylaxis of diaper rash and diaper dermatitis
EP0158092A1 *Feb 28, 1985Oct 16, 1985Henkel Kommanditgesellschaft auf AktienHygienic article
EP0159490A1 *Feb 28, 1985Oct 30, 1985Chemiefaser Lenzing AktiengesellschaftDeodorizing and microbistatic fibre material
EP0163179A1 *May 10, 1985Dec 4, 1985Vereinigte Papierwerke AGMenstrual tampon
Classifications
U.S. Classification424/76.1, 424/632, 514/499, 424/637, 424/76.6, 424/606, 427/439
International ClassificationD06M11/65, A61L15/18, D06M11/00, D06M11/56, D06M11/13, A61L15/16
Cooperative ClassificationD06M11/56, D06M11/65, A61L15/18, D06M11/13
European ClassificationD06M11/56, D06M11/65, A61L15/18, D06M11/13