Compressed Bleaching Composition for Keratin Fibers
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Solution Overview
Problem
Bleaching powders used for keratin fibers, such as hair, are inefficient in acidic mediums, form dust during handling, and contain irritant components, leading to handling and stability issues, as well as reduced lightening power.
Innovation Solution
A compressed bleaching composition comprising persulfates and water-soluble silicates, in a compact form, which can be directly mixed with an aqueous oxidizing agent, improving stability and homogeneity, and eliminating the need for separate alkaline agents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If bleaching powders containing persulfates and alkaline compounds are used, then bleaching effectiveness is improved, but dust formation and irritant risks increase during handling
Solution Approach 1:
The patent transforms the physical state parameter of the bleaching composition from loose powder to compressed tablet form. This parameter change eliminates dust formation during handling while maintaining all active ingredients (persulfates and alkaline compounds) for effective bleaching action when the tablet is dissolved in water.
Solution Approach 2:
The patent creates a composite compressed tablet containing multiple components: persulfates (oxidizing agent), alkaline compounds (pH regulator), and binding agents. This composite structure integrates all necessary functional ingredients into a single stable form that prevents dust while maintaining bleaching effectiveness.
2Object-affected harmful factors
If less volatile powders or pastes are used to reduce dust, then handling safety is improved, but lightening power and effectiveness are reduced
Solution Approach 1:
The patent changes the physical form from powder/paste to compressed tablet, which eliminates dust volatility while preserving lightening power. The compression process densifies the active ingredients without degrading their oxidizing capability, and the tablet dissolves completely in water to release full-strength bleaching agents.
Solution Approach 2:
The compressed tablet is designed as a single-use disposable unit that is stable during storage and handling but dissolves completely during use to release all active ingredients. This disposable format ensures no loss of lightening power while eliminating dust problems during storage and transport.
3Ease of operation
If powders are used for bleaching, then ease of application is improved, but stability during storage and transportation is reduced
Solution Approach 1:
The patent changes the physical state from loose powder to compressed tablet, which dramatically improves stability during storage and transportation by preventing moisture absorption and ingredient segregation. The tablet maintains ease of application through simple dissolution in water, combining storage stability with operational convenience.
4Stability of the object's composition
If compressed form is used to improve stability, then handling and storage are improved, but manufacturing complexity increases
Solution Approach 1:
The patent applies compression to transform powder into stable tablet form. This parameter change improves storage stability while the compression process itself is a simple, well-established manufacturing technique that does not significantly increase process complexity.
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 compressed composition enhances the bleaching process by maintaining lightening power, reducing dust and irritant risks, and stabilizing against temperature variations during storage and transportation.
Implementation Method 1
bleaching powders containing a peroxygenated reagent such as ammonium or alkali metal persulfates
Implementation Method 2
The bleaching of human keratin fibres, and more particularly the hair, is performed by oxidation of the 'melanin' pigment
Implementation Method 3
combined at the time of use with an aqueous hydrogen peroxide composition
Implementation Method 4
aqueous hydrogen peroxide composition... formation of active oxygen
Data Source
AI summary
The present invention relates to a process for bleaching keratin fibers which consists in applying to the keratin fibers a composition A, which is in compressed form, comprising at least one persulfate, in the presence of an aqueous composition B.