Rearranger process and composition for permanent waving process
Patent 4883657 Issued on November 28, 1989. Estimated Expiration Date: 
February 19, 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.
February 19, 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. 158209 filed on 02/19/1988US Classes:424/70.5, Sulfur compound containing132/204, Relaxing or reducing agent followed by fixing or neutralizing agent (e.g., "permanent")132/205, Including specified treatment interval424/70.16Poly(meth)acrylic acid, salt, or copolymer thereofExaminersPrimary: Page, Thurman K.Assistant: Rucker, Susan S. Attorney, Agent or FirmInternational ClassesA61K 007/09A45D 007/04 AbstractAn improved rearranging composition and permanent waving process is disclosed. The improved waving process produces hair that is characterized as thicker, more full bodied with improved humectant properties and requiring significantly less maintenance than is typically required when conventional waving processes are used. The 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 the improved rearranging composition. The rearranging composition comprises a homogeneous mixture of a salt of thioglycolic acid and a homopolymer of methylacrylamidopropyltrimethyl 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 to about 10.5.Other References
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