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Publication numberUS2670489 A
Publication typeGrant
Publication dateMar 2, 1954
Filing dateApr 11, 1946
Priority dateApr 11, 1946
Publication numberUS 2670489 A, US 2670489A, US-A-2670489, US2670489 A, US2670489A
InventorsFrist National Bank Of Ka City, Cross Mary Forbes
Original AssigneeKansas City Testing Lab
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Brush and synthetic bristles for imparting antiseptic properties
US 2670489 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)

Patented Mar. 2, 1954 UNITED STATES PATENT OFFICE BRUSH AND SYNTHETIC BRISTLES FOR l. C IMPARTING ANTISEPTIC PROPERTIES "N6 Drawing, Application April 11, 1946, v "Serial N0. 661,336

2 Claims. (01.15-167) An object of this invention is the production of an impregnated synthetic bristle which may be used as a tooth brush, a brush for medicinal agents, an abrasive brush, a polishing brush and for other purposes.

A purpose is to produce bristles primarily for use in brushes which will cleanse by mechanical action, by abrasive action, by chemical action and in certain cases have a tonic and medicinal efiect.

In making the product of this invention, one method comprises mixing various additive agents to a plastic mass, which mass is then extruded through holes or drawn out in a filament to produce bristles or the plastic mass may be spread thin and cut into very narrow strips to produce the bristles.'

Among the basic substances used for the carrier are cellulose acetate, cellulose nitrate, nylon, vinylidine chloride and other plastics or polymers of styrenes of suitable thermoplastic characteristic.

In these cases, the abrasive, medicinal or other agents are preferably mixed in powder or fibrous form with the base in powder form. The material is then fused and while in the molten state is drawn out, spread or extruded to produce the thin bristles.

Among the agents used for incorporation into the bristles or into the plastic material before it is formed into the bristles are antiseptics, including specifically as examples, alkali or alkaline earth salicylates, alkali or alkaline earth fluorides, alkali or alkaline earth phosphates, phosphoric acid, magnesium oxide and magnesium fluoride.

In making bristles for a tooth brush, a representative composition is as follows:

Parts A polymer of styrene 94 Magnesium salicylate 2 Magnesium fluoride 1 Calcium phosphate 2 Borax 1 traces of manganese, iron, nickel, cobalt, copper, chromium, zinc in quantities of less than 0.01%.

In each composition, it is often desirable to use tricresyl-phosphate in suflicient quantity to give the desired plasticity and consistency. This ordinarily would be about 5% of the total mixture. In many cases, it is desired to add an abrasive agent for a tooth brush bristle. This abrasive agent in this case would be of the nature of pumicite or other material not having a higher degree of hardness than pumicite. The amount may vary within wide limits, a representative amount being 5% of the total mixture.

When an abrasive action is required against very hard material such as in the manufacture of polishing brush for bronze, brass, chromium finishes and. the like, then a hard abrasive material of high degree of hardness may be used such as carborundum powder for incorporation into the bristle.

Instead of ready prepared plastics, a mixture of the following in the following proportions may be used as a base:

' Parts Nitrocellulose of suitable viscosity 14 Tricresyl phosphate 2 Ester gum 7.5 Kettle boiled linseed oil r- 1.5

These materials are fused together at temperatures up to 300 C. and the minerals incorporated while hot. Ordinarily, it is most desirable to use synthetic plastic materials. It is often desirable to add as much of the chemical substances as can be carried without reducing the strength and pliability of the bristle.

In making the bristle, a nylon plastic may be incorporated with 10% of magnesium oxide, 10% pumicite and of 1% magnesium fluoride. It will be obvious that the various combinations may be used in accordance with the results desired.

Bristles made in the above manner are suitable for manufacture of many types of brushes including a tooth brush for mechanical effect, for cleansing, for neutralizing, for chemical and tonic effect. For example, magnesium fluoride incorporated to the extent of only one hundredth of one percent is beneficial in maintaining the health of dental tissues. At the same time when it is desired to obtain an abrasive effect, as much as 10% of an abrasive such as soft pumicite may be used.

For special polishing and bufiing brushes for metals ,wood, stone, leather, etc. a large amount of harder abrasives is desired. An abrasive for this purpose may be siliceous, glassy or in the nature of tripoli.

Bristles for hair brushes may have incorporated in them elements for medicinal effect. It is found that percentages of arsenic, for example, .01% is often sufficient for maintaining the health of the scalp and hair. Arsenic is added preferably in the form of arsenic trioxide. It is also effective in eliminating and preventing dandruff.

Curry brushes for cattle and horses and other 3 animals in which the bristles are impregnated with arsenic and percentages of other elements are extremely useful in maintaining the health and nice appearance of the coats.

The bristles for clothes brushes have incorporated in them compositions such as dichlorodiphenyl-trichloroethane, difiuoro-diphenyl-trichlorethane and anti-moth chemicals.

The bristles for paint brushes may have incorporated in them preservatives to prevent the softening of the bristles.

Scrub brushes may be of the same type as polishing and buifing brushes.

Hand brushes, nail brushes and medicinal brushes may have incorporated in the bristles; numerous substances for medicinal action pare ticularly antiseptics such as iodized materials and skin sedatives.

I claim:

1. A synthetic tooth brush bristle which comprises a thermoplastic resin having uniformly incorporated therein before drawing a fluoride.

2. A tooth brush comprising synthetic bristles which consist essentially of a thermoplastic resin having uniformly incorporated therein before drawing an antiseptic agent comprising a fluoride in suflicient amount that a portion cf said fluoride is imparted to the tooth when said brush is applied thereto.


References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 2,099,688 Hill Nov. 23, 1937 2,214,397 Austin Sept. 10, 1940 2,216,835 Carothers Oct. 8, 1940 2,226,529 Austin Dec. 31, 1940 2,249,686 Dykstra July 15, 1941 2,273,364 Mallory Feb. 17, 1942 2,309,021 Stonehill a Jan. 19, 1943 OTHER- REFERENCES Ser. No. 715,003, Wulfi (A. P. 6.), published April 27, 1943.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2099688 *Apr 7, 1933Nov 23, 1937Prophy Lac Tic Brush CompanyTooth brush and process of making the same
US2214397 *Jul 25, 1938Sep 10, 1940Du PontPlasticized synthetic linear polyamide composition
US2216825 *Sep 16, 1936Oct 8, 1940Honeywell Regulator CoBuilding temperature control system
US2226529 *Nov 10, 1937Dec 31, 1940Du PontSynthetic filament
US2249686 *Sep 29, 1938Jul 15, 1941Du PontPolymeric material
US2273364 *Feb 6, 1940Feb 17, 1942Wingfoot CorpFilament
US2309021 *Jul 16, 1938Jan 19, 1943Johnson & JohnsonMethod of treating bristles and product thereof
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3076218 *Jun 8, 1961Feb 5, 1963Johnson & JohnsonFluorinated toothbrush bristle and method of making same
US3964482 *May 17, 1971Jun 22, 1976Alza CorporationDrug delivery device
US4834076 *Apr 15, 1986May 30, 1989Millet Jean MDevice for treating the external human epithelium, process for its manufacture and process for using such a device
US5320842 *Nov 2, 1992Jun 14, 1994Gillette Canada Inc.Polymeric particles for dental applications
US5340581 *Jun 15, 1992Aug 23, 1994Gillette Canada, Inc.Sustained-release matrices for dental application
US5565206 *Mar 11, 1994Oct 15, 1996Gillette Canada Inc.Polymeric particles for dental applications
US5633083 *Jul 18, 1994May 27, 1997Sunstar KabushikiToothbrush
US5720941 *Jun 6, 1995Feb 24, 1998Gillette Canada Inc.Polymeric particles for dental applications
US5723132 *Jun 6, 1995Mar 3, 1998Gillette Canada Inc.Sustained-release matrices for dental application
US5851551 *Jun 21, 1994Dec 22, 1998The Gillette CompanySustained-release matrices for dental application
US5906834 *Oct 9, 1996May 25, 1999The Gillette CompanyColor changing matrix as wear indicator
US5998431 *Apr 16, 1998Dec 7, 1999Gillette Canada Inc.Sustained-release matrices for dental application
US6871374Mar 22, 2004Mar 29, 2005E. I. Du Pont De Nemours And CompanyLow friction toothbrush
US7338664Sep 15, 2003Mar 4, 2008The Gillette CompanyColor changing matrix as wear indicator
US20040134010 *Sep 15, 2003Jul 15, 2004The Gillette Company, A Delaware CorporationColor changing matrix as wear indicator
US20040175675 *Mar 22, 2004Sep 9, 2004Brezler Russel A.Low friction toothbrush
US20110306012 *Dec 15, 2011Smailus GuenterTool for the treatment of surfaces of dental materials
U.S. Classification15/167.1, 15/104.93, 264/243
International ClassificationA61Q11/00, A61K8/21
Cooperative ClassificationA61Q11/00, A61K8/21
European ClassificationA61Q11/00, A61K8/21