Permanent waving process and compositions
Patent 4996997 Issued on March 5, 1991. Estimated Expiration Date: 
March 5, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
March 5, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesHair conditioning and composition therefor Hair waving or straightening process and product Composition for altering the configuration of hair Hair treatment composition Pre-shampoo normalizer for a hair straightening system Patent #: 4602648 InventorsAssigneeApplicationNo. 157842 filed on 02/19/1988US Classes:132/204, Relaxing or reducing agent followed by fixing or neutralizing agent (e.g., "permanent")132/209, Plural separately applied or supplied named compositions424/70.13, Polysaccharide or derivative424/70.16, Poly(meth)acrylic acid, salt, or copolymer thereof424/70.5Sulfur compound containingExaminersPrimary: Stone, Cary E.Assistant: Lepiane, Adriene J. Attorney, Agent or FirmForeign Patent References
International ClassA45D 007/04AbstractAn 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.Other References
Field of SearchHair treatment by application of specific chemical compositionFor deformation, setting or holding (e.g., curling or waving) Relaxing or reducing agent followed by fixing or neutralizing agent (e.g., "permanent") Including specified treatment interval And use of specific device Plural separately applied or supplied named compositions Hair deformation or set (e.g., curling, waving) | |
