# US 9,872,824 B2 · Semi-permanent hair straightening composition and method

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- Number: US 9,872,824 B2
- Document ID: US9872824B2
- Status: Granted
- Kind: B2
- Application number: 14/766,217
- Filed: 2014-02-03
- Published: 2015-12-31
- Granted: 2018-01-23
- Earliest claimed: 2013-02-06
- Assignees: Lubrizol Advanced Materials, Inc.
- Applicants: Lubrizol Advanced Materials, Inc.
- Inventors: Murat Kadir; Mark J. McGuiness
- Web page: https://patentgrep.com/patent/US9872824B2

## CPC

- A61K 8/4973: {with oxygen as the only hetero atom}
- A61K 8/49: containing heterocyclic compounds
- A61Q 5/06: Preparations for styling the hair, e.g. by temporary shaping or colouring
- A61Q 5/04: Preparations for permanent waving or straightening the hair
- A61Q 5/12: Preparations containing hair conditioners
- 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

A composition and a process for straightening hair are disclosed. The process includes coating keratin fibers with a composition comprising a thermally-activated agent and contacting the coated keratin fibers with a heating device at a temperature of at least 185° C. for sufficient time to modify the keratin fibers. The thermally-activated agent comprises a heterocyclic compound containing two heteroatoms selected from nitrogen and oxygen in a 5 or 6-membered ring, such as a cyclic alkylene carbonate.

## Claims

### Claim 1

A process for straightening hair comprising;
coating hair fibers with a composition comprising ethylene carbonate; and
contacting the coated hair fibers with a heating device at a temperature of at least 185° C. for at least 5 passes of continuous movement of said heating device from the root of the hair to the end to modify the hair fibers,
and wherein said composition is free of cyclic mercapto-group, thiols group and sulfite group containing compounds.

### Claim 2 (depends on 1)

The method of claim 1, wherein the composition further comprises a solvent.

### Claim 3 (depends on 2)

The process of claim 2, wherein the solvent is selected from water, C1-C12 alcohols, and combinations thereof.

### Claim 4 (depends on 3)

The process of claim 3, wherein the solvent is selected from C1-C10 aliphatic and aromatic alcohols.

### Claim 5 (depends on 4)

The process of claim 4, wherein the solvent is selected from ethylene glycol, propylene glycol, glycerin, butylene glycol, hexylene glycol, ethanol, propanol, isopropanol, hexanol, benzyl alcohol, cyclohexanol, and mixtures thereof.

### Claim 6 (depends on 2)

The process of claim 2, wherein the solvent is selected from natural and synthetic oils and waxes.

### Claim 7 (depends on 6)

The process of claim 6, wherein the solvent is selected from vegetable oils, plant oils, animal oils, essential oils, mineral oils, C7 to C40 isoparaffins, alkyl carboxylic esters, jojoba oil, and shark liver oil.

### Claim 8 (depends on 1)

The process of claim 1, wherein the composition comprises at least 5 wt. % ethylene carbonate.

### Claim 9 (depends on 1)

The process of claim 1, wherein heating device comprises a flat iron.

### Claim 10 (depends on 1)

The process of claim 1, further comprising drying the hair fibers to remove at least a portion of the solvent prior to contacting the coated hair fibers with a heating device.

### Claim 11 (depends on 1)

The process of claim 1, wherein the coating of the hair fibers with the composition comprises contacting the hair fibers with said composition for at least 30 minutes.