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Use of ascorbic acid in permanent waving and hair coloring compositions

A technology of ascorbic acid and composition, applied in the field of ascorbic acid in hair care composition, can solve problems such as unresolved

Inactive Publication Date: 2000-09-20
LOREAL SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, the copper-catalyzed peroxide degradation indicated in the Graf patent does not solve the difficult problem in the art of finding effective peroxide-free perm neutralizers and / or oxidative hair coloring systems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Embodiment 1: comparative example

[0051] Prepare the following solutions. Solution A (invention example) Cu 2+ 20ppm

[0052] Ascorbic acid 2 grams

[0053] Sodium perborate monohydrate 4 g

[0054] Water q.s.100% solution B (comparative example) Cu 2+ 20ppm

[0055] Ascorbic acid 2 grams

[0056] Sodium perborate monohydrate 0 g

[0057] Water q.s.100%

[0058] Comparing solutions A and B, the following results were obtained:

[0059] Solution A (invention example)

[0060] It is clear that solutions containing the oxidant sodium perborate exhibit much higher oxidation potential (Emv) and dissolved oxygen (pO 2 ).

Embodiment 2

[0061] Example 2: Test Tube Crimp Test (TTTC) Assay

[0062] Glue together 12 hair fibers of normal brown hair with the root ends of 12 fibers of dyed brown hair. Wet each sample with tap water and wrap around a 7mm iron under moderate tension. Ammonium thioglycolate (ATG) was used as a permanent wave composition.

[0063] Six normal hair samples and six dyed hair samples were processed in polystyrene tanks (13 cm x 13 cm) per test. The reforming lotion was applied with a 5 ml polyethylene disposable pipette, 2 ml per stick. Half of the samples in each group were treated with reformate containing the oxidation system of the present invention. The other half was treated with conventional oxidant hydrogen peroxide (i.e. 2% H 2 o 2 ,pH 3 ) reformate treatment.

[0064] After each sample was fully saturated with solution, remove all excess reconstituted solution from the tank; cover the tank with Reynolds 910 film and let stand at room temperature for 20 minutes. The washi...

Embodiment 3

[0068] Example 3: Tensile Strength

[0069] The tensile strength of hair was determined with an Instron 1122. Tensile strength is measured as "20% work done", ie the work required to elongate hair 20% of its length. The measurement is carried out at 20°C and 50% relative humidity at a speed of 100 mm / min. 32 fibers for each treatment regimen were tested. Means between treatments were compared using a pairwise multivariate comparison procedure (One Way Anova for SigmaStat version 2.0) based on the Student-Newman-Keuls method or the Kruskal-Wallis One Way Analysis of Variance on Ranks. result.

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PUM

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Abstract

A novel oxidizing system comprising ascorbic acid, at least one metal ion and an oxidizing agent capable of generating an oxidizing potential of from about 100 to about 500 millivolts at a pH ranging from about 2 to about 10. The oxidizing system can be used in quenching or neutralizing permanent wave processes and in developing oxidative hair color.

Description

field of invention [0001] The present invention relates to the use of ascorbic acid in hair care compositions, especially hair perming and hair coloring compositions. More specifically, the present invention relates to an oxidation system comprising ascorbic acid, at least one metal ion, and an oxidizing agent which, when used in the compositions of the present invention, can Generates an oxidation potential of approximately 100 to 500 mV. The invention also relates to hair perming and hair coloring kits. Background of the invention [0002] When perming, the hair is first treated with a reducing composition capable of breaking hair keratin disulfide bonds (S-S) and forming sulfhydryl groups (-SH). In other words, it converts the amino acid cystine in the hair into cysteine. The hair is then reformed into a new shape under the applied mechanical tension by wrapping it around a rod (perm) or combing it straight (straightening). The hair, still under mechanical tension, is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K8/00A61KA61K8/19A61K8/22A61K8/40A61K8/44A61K8/58A61K8/60A61K8/64A61K8/67A61Q5/04A61Q5/10C07BC07B33/00
CPCA61K8/676A61K8/22A61K8/19A61Q5/04A61K8/67A61Q5/10
Inventor T·舒尔茨N·法捷耶夫D·W·坎内尔
Owner LOREAL SA
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