Antimicrobial and deodorant cosmetic brush and method

• US 6,604,531 B2
• Filed: 02/05/2002
• Issued: 08/12/2003
• Est. Priority Date: 02/06/2001
• Status: Expired due to Fees

• Current Assignee: Kenji Nakamura, Koji Nakamura
• Original Assignee: Kenji Nakamura, Koji Nakamura
• Inventors: Nakamura, Koji, Nakamura, Kenji
• Primary Examiner(s): Robert, Eduardo C.
• Assistant Examiner(s): COMSTOCK, DAVID C
• Application Number:
  US10/068,085
• Publication Number:
  US 20020144703A1
• Time in Patent Office: 553 Days
• Field of Search: 132/200, 132/313, 132/120, 132/163, 152/072, 428/375, 428/378, 428/393, 428/395, 812/75, 812/751, 812/76, 8 9/914, 860/6, 818/8
• US Class Current: 132/200
• CPC Class Codes: A46B 2200/1046 Brush used for applying cosmetics
• CPC Class Codes: A46D 1/006 Antimicrobial, disinfectant bristles, handle, bristle-carrier or packaging
• CPC Class Codes: A46D 9/06 Impregnating
• CPC Class Codes: Y10T 428/2933 Coated or with bond, impregnation or core

Abstract

Natural bristles (animal hairs) are submerged in a solution containing at least one or more kinds of cationic surfactants selected from alkyl ammonium salts containing a quaternary nitrogen or alkylbenzyl ammonium salts containing a quaternary nitrogen, and alkylpyridinium salts to adsorb the cationic surfactants onto the natural bristles in an amount of 0.2-5% by weight by treating with heat, and a hair brush is produced using these natural bristles.

Claims

1. A cosmetic brush having wash-and-rub-durable antimicrobial and deodorant properties, comprising natural animal hair bristles to which at least one or more kinds of cationic surfactants selected from alkyl ammonium salts containing a quaternary nitrogen or alkylbenzyl ammonium salts containing a quaternary nitrogen, and alkyl pyridinium salts in an amount of 0.2-5% by weight are adhered by heat solution adsorption.

2. The cosmetic brush having wash-and-rub-durable antimicrobial and deodorant properties as claimed in claim 1, wherein proteins of the natural bristles are denatured by a protein denaturation agent.

3. A method of producing a cosmetic brush having wash-and-rub-durable antimicrobial and deodorant properties, characterized in that natural bristles are submerged into an aqueous solution containing at least one or more kinds of cationic surfactants selected from alkyl ammonium salts containing a quaternary nitrogen or alkylbenzyl ammonium salts containing a quaternary nitrogen, and alkyl pyridinium salts, said cationic surfactants in an amount of 0.2-5% by weight are adhered onto the natural bristles by adsorption with heating, and then the resulting natural bristles are used for the cosmetic brush.

4. The method of producing a cosmetic brush as claimed in claim 3, wherein an auxiliary agent for adsorption of the abovementioned cationic surfactants and/or a protein denaturation agent are added to the aqueous solution.

5. The method of producing a cosmetic brush as claimed in claim 3, wherein the protein denaturation agent is urea or guanidine hydrochloride.

6. The method of producing a cosmetic brush as claimed in claim 3, wherein the auxiliary agent for adsorption is an inorganic acid, organic acid or inorganic salt.

7. The method of producing a cosmetic brush as claimed in claim 6, wherein the organic acid is acetic acid, lactic acid, malic acid, or citric acid.

8. The method of producing a cosmetic brush as claimed in claim 6, wherein the inorganic salt is sodium sulfate or sodium chloride.