Hair Dye Second Agent Composition Managing Firmness and Manageability
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Solution Overview
Problem
Existing hair dyeing and bleaching processes often result in reduced hair firmness and manageability due to chemical damage, and previous compositions fail to achieve sufficient dyeing or bleaching power while maintaining hair resilience and uniformity.
Innovation Solution
A second agent composition containing specific weight ratios of liquid and solid oils, cationic and nonionic surfactants, and an oxidizing agent, which is mixed with a first agent composition containing an alkali agent, to enhance hair dyeing or bleaching results and improve hair resilience and manageability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a large amount of cationic polymer is added to obtain good manage ability of hair, then manage ability is improved, but hair hardens and causes creaking
Solution Approach 1:
The patent changes the chemical parameters by using a specific cationic polymer with controlled molecular weight (5,000-500,000) and specific functional groups, along with precise concentration control (0.1-10% based on total composition), to achieve manageability without excessive hardening
Solution Approach 2:
The patent creates a composite system by combining the cationic polymer with specific oils (liquid oil: solid oil = 2:1 to 10:1 weight ratio) and surfactants, where the components work synergistically to provide manageability while maintaining hair flexibility and preventing creaking
2Power
If oil is added to increase dyeing or bleaching power, then dyeing power is improved, but firmness/resilience and manage ability of hair are insufficient
Solution Approach 1:
The patent optimizes the oil composition parameters by selecting specific types of liquid oils (fatty acid esters, hydrocarbon oils, silicone oils) and solid oils (fatty alcohols, waxes) with controlled molecular structures, and maintains their weight ratio between 2:1 to 10:1, achieving both high dyeing power and hair care effects
Solution Approach 2:
The patent formulates a composite oil system combining multiple oil types with complementary functions - liquid oils for penetration and dyeing power, solid oils for hair smoothing and manageability, creating a synergistic effect that achieves both high dyeing power and excellent hair condition
3Stability of the object's composition
If surfactant is added to stabilize emulsion, then storage stability is improved, but dyeing or bleaching power is reduced
Solution Approach 1:
The patent carefully controls the surfactant concentration parameter (0.1-5% of total composition) and selects specific surfactant types with appropriate HLB values to maintain emulsion stability while minimizing interference with the oxidizing agent's dyeing/bleaching activity
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 composition achieves good firmness, manageability, and uniformity of hair after treatment, with improved storage stability and operability, and a smooth feeling, while maintaining sufficient dyeing or bleaching power.
Implementation Method 1
a second agent composition containing an oxidizing agent
Implementation Method 2
the cationic surfactant comprises an alkyltrimethylammonium chloride which has from 16 to 22 carbon atoms in the alkyl group thereof
Data Source
AI summary
An object of the present invention is to provide a composition which enables sufficient dyeing or bleaching of hair and which imparts firmness/resilience and manage ability to hair. The present invention relates to a second agent composition for hair dyeing or bleaching containing: (A) (a1) from 10 to 30 % by weight of an oil which is in a liquid form at normal temperature and (a2) an oil which is in a solid form at normal temperature, wherein, the oil which is in a solid form at normal temperature comprises a higher alcohol which is in a solid form at normal temperature, and the weight ratio (A)/(a2) of the total weight (A) of (a1) and (a2) to (a2) is from 3 to 8, (B) (b1) a cationic surfactant and (b2) a nonionic surfactant, wherein, the cationic surfactant comprises an alkyltrimethylammonium chloride which has from 16 to 22 carbon atoms in the alkyl group thereof, and the total weight (B) of (b1) and (b2) is from 0.5 to 1.8 % by weight, and (C) from 0.1 to 12 % by weight of an oxidizing agent, wherein, the weight ratio (A)/(B) of (A) to (B) is from 5 to 30.