Method of thermo-styling hair
US5639448A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 11, 1994 |
| Grant date | Jun 17, 1997 |
| Priority date | — |
| Expiry date | May 11, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S424/02
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A method of thermally setting hair including the sequential steps of: PA1 (a) applying a thermoplastic polyester fixative resin composition, having a pH less than about 5, to the hair prior to configuring the hair in a desired configuration; PA1 (b) contacting the hair with a thermal appliance to heat the applied polyester to its glaze transition temperature; PA1 (c) configuring the hair while the polyester is at a temperature of at least its glass transition temperature; and PA1 (d) cooling the polyester to a temperature below its glass transition temperature while the hair is in the desired configuration to harden the polyester in the shape of the configured hair. Preferably, the thermoplastic polyester fixative resin includes a plurality of neutralized sulfonate moieties, and has a glass transition temperature below about 120.degree. C., and is solubilized or dispersed in water in an amount of about 0.1% to about 20%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.