# US 8,540,975 B2 · Hair styling method

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- Number: US 8,540,975 B2
- Document ID: US8540975B2
- Status: Granted
- Kind: B2
- Application number: 13/061,804
- Filed: 2009-09-03
- Published: 2011-07-28
- Granted: 2013-09-24
- Earliest claimed: 2008-09-03
- Assignees: Alberto-Culver Company
- Applicants: Gilles M Verboom; Jean Louise Razon Navarro
- Inventors: Gilles M Verboom; Jean Louise Razon Navarro
- Web page: https://patentgrep.com/patent/US8540975B2

## CPC

- A61K 8/817: {Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen; Compositions or derivatives of such polymers, e.g. vinylimidazol, vinylcaprolactame, allylamines (Polyquaternium 6)}
- A61K 8/365: Hydroxycarboxylic acids; Ketocarboxylic acids
- A61Q 5/06: Preparations for styling the hair, e.g. by temporary shaping or colouring
- A61K 2800/884: Sequential application
- A61K: PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES (devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms A61J3/00; chemical aspects of, or use of materials for deodorisation of air, for disinfection or sterilisation, or for bandages, dressings, absorbent pads or surgical articles A61L; soap compositions C11D)
- A61Q: SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS

## Abstract

Provided is a method for styling mammalian hair that includes contacting the hair with a composition that includes a poly(vinylamine-vinylformamide) copolymer and a first carrier, contacting the hair with a composition that includes a citrate and a second carrier, and styling the hair. The method of the present invention promotes improved hair styling properties such as improved curl retention and straightness retention, e.g., under conditions of high relative humidity and temperature. The method can be used for semi-permanently straightening or curling the hair. Also provided is a method for controlling frizz by applying the copolymer and citrate compositions.

## Claims

### Claim 1

A method of styling mammalian hair, wherein said method comprises:
either first contacting the hair for about 1 to 20 minutes with a styling-effective amount of a composition comprising a poly(vinylamine-vinylformamide) copolymer and an aqueous carrier; and
thereafter contacting the hair for about 1 to 20 minutes with a styling-effective amount of a composition comprising a citrate and an aqueous carrier; or contacting the hair for about 1 to 20 minutes with a styling-effective amount of a composition comprising a citrate and an aqueous carrier; and
thereafter contacting the hair for about 1 to 20 minutes with a styling-effective amount of composition comprising a poly(vinylamine-vinylformamide) copolymer and an aqueous carrier; and
subsequently styling the hair by contacting the hair with a device comprising at least one flat surface at a temperature of at least about 100° C. for at least about 1 second to at least semi-permanently, straighten the hair wherein the poly(vinylamine-vinylformamide) copolymer comprises a high molecular weight poly(vinylamine-vinylformamide) copolymer, a low molecular weight poly(vinylamine-vinylformamide) copolymer, or a combination thereof and wherein the citrate is selected from the group consisting of citrate salts of sodium, citrate salts of potassium and citrate salts of calcium.

### Claim 2 (depends on 1)

The method of claim 1, wherein the citrate salt of sodium is disodium citrate.

### Claim 3 (depends on 1)

The method of claim 1, wherein the high molecular weight poly(vinylamine-vinylformamide) copolymer comprises at most about 95 mol % vinylamine monomers.

### Claim 4 (depends on 1)

The method of claim 1, wherein the high molecular weight poly(vinylamine-vinylformamide) copolymer comprises at most about 50 mol % vinyl amine monomers.

### Claim 5 (depends on 1)

The method of claim 1, wherein the high molecular weight poly(vinylamine-vinylformamide) copolymer comprises at most about 30 mol % vinyl amine monomers.

### Claim 6 (depends on 1)

The method of claim 1, wherein the high molecular weight poly(vinylamine-vinylformamide) copolymer comprises at most about 10 mol % vinyl amine monomers.

### Claim 7 (depends on 1)

The method of claim 1, wherein the low molecular weight poly(vinylamine-vinylformamide) copolymer comprises about 95 mol % vinyl amine monomers.

### Claim 8 (depends on 1)

The method of claim 1, wherein either composition further comprises a conditioning agent.

### Claim 9 (depends on 8)

The method of claim 8, wherein the conditioning agent is present in an amount of about 0.25 wt % to about 1.5 wt %.

### Claim 10 (depends on 1)

The method of claim 1, wherein either composition further comprises a surfactant.

### Claim 11 (depends on 1)

The method of claim 1, wherein either composition further comprises propellant.

### Claim 12 (depends on 11)

The method of claim 11, wherein either composition is in the form of a mousse or a gel.

### Claim 13

The method of claim further comprising the step of rinsing the hair with water after contacting the hair with both compositions.