The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 05, 1991
Filed:
Feb. 19, 1988
Barry W Williams, Chicago, IL (US);
Pamela M Daniels, Gary, IN (US);
Amethyst Investment Group, Inc., Chicago, IL (US);
Abstract
An improved permanent waving process is disclosed. The improved waving process produces hair styles characterized as bouncier, more full bodied with an open/looser pattern of curls. Furthermore, the waving process of the invention provides for improved humectant properties that results in significantly less maintenance than is typically required when conventional waving processes are used. This waving process is a step-by-step procedure involving the addition of a rearranger, a wrapping lotion, and a neutralizer, in combination with intermittent rinsing. The improved quality and settability of the hair is believed to be attributable to a synergistic effect of an improved rearranging composition and an improved wrapping lotion. The rearranging composition comprises a homogenous mixture of a salt of thioglycolic acid and a homopolymer of methyacrylamidopropyltrimethyl ammonium chloride (MAPTAC). A preferred rearranging composition includes a weight ratio of ammonium thioglycolate to monoethanolamine thioglycolate of from about 4:6 to about 7:3 and between about 1.0 to about 3.0% by weight of a cationic homopolymer of MAPTAC. The rearranging composition should also be pH adjusted to between about 3.0 and about 10.5. The improved wrapping lotion composition comprises a homogenous mixture of a guar component and a salt of thiogycolic acid. A preferred wrapping lotion composition includes between about 0.2 and about 2.5% by weight of a nonionic hydroxypropylated guar and between about 0.3 and about 7.0% ammonium thiogycolate. The wrapping lotion composition should also be pH adjusted to between about 7.0 and about 10.5 and have a viscosity in the range from about 500 cps to about 12,000 cps.