Permanent Hair Shaping Composition With Ectoin for Lower Damage
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Solution Overview
Problem
Conventional permanent shaping compositions for hair, such as those using thioglycolic acid, cause varying efficiency based on hair damage levels and strong alkaline pH with heat application exacerbates damage, leading to unsatisfactory results and hair deterioration.
Innovation Solution
Incorporation of ectoin and/or hydroxyectoin into the composition at specific concentrations and pH levels, along with a method involving reducing and oxidizing agents, to enhance shaping performance and reduce damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional permanent shaping compositions (thioglycolic acid) are used, then permanent waving and straightening can be achieved, but hair damage increases and efficiency varies with damage level
Solution Approach 1:
Ectoin and hydroxyectoin are introduced as intermediary substances that mediate between the reducing agent and the hair structure. These compounds form a protective complex with the hair proteins during the reducing phase, preventing direct contact between the harsh reducing agent and the hair keratin, thereby reducing damage while maintaining shaping efficiency
Solution Approach 2:
The invention creates a composite chemical system combining reducing agents (thioglycolic acid or cysteine) with protective agents (ectoin and/or hydroxyectoin) in specific ratios. This composite composition works synergistically where the reducing agent provides the necessary bond breaking for shaping while the ectoin compounds provide protection, achieving both effective permanent shaping and reduced hair damage
2Productivity
If strong alkaline pH (7.5-10.5) is used with heat, then permanent shaping performance is improved, but hair damage is exacerbated
Solution Approach 1:
The invention optimizes the pH parameter to a specific range (7.5-10.5) and maintains it throughout the treatment process by using ectoin and hydroxyectoin as pH buffers. These compounds stabilize the alkaline environment needed for effective permanent shaping while preventing excessive pH elevation that would cause damage, thus allowing heat application without compounding harm
3Ease of operation
If conventional compositions are applied to damaged hair, then the process can proceed, but the efficiency and durability of the shaping effect is poor
Solution Approach 1:
Ectoin and hydroxyectoin provide beforehand cushioning by forming a protective layer on the hair surface and within the hair structure before the reducing agent acts. This pre-protection is especially beneficial for damaged hair, creating a buffer that prevents further degradation during the chemical process and ensures the shaping effect lasts longer
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The addition of ectoin and/or hydroxyectoin extends the longevity of hair shape change and reduces hair damage, improving the durability and efficiency of permanent waving and straightening processes.
Implementation Method 1
the reductive splitting of the cysteine disulfide bonds in the hair by a reducing agent
Implementation Method 2
the subsequent neutralization by application of an oxidizing agent, whereby the cysteine disulfide bonds are restored
Data Source
AI summary
The present invention relates to a composition for the permanent shaping of human hair used both for the permanent waving of human hair with satisfactory waving effect as well as for the straightening of either naturally or chemically curled hair comprising one or more reducing agents and ectoin and/or hydroxyectoin.