Cationic Hydrolysed Starch Hair Fixative Film Formation
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Solution Overview
Problem
Existing hair fixative formulations require pre-heating and have limitations in water solubility and handling due to unhydrolysed starch, and prior art does not adequately utilize Dextrose Equivalent in hydrolysed starch for hair fixative properties.
Innovation Solution
A hair fixative composition using cationically modified hydrolysed starch with a Dextrose Equivalent of ≥1 to 6, which provides improved flexibility, adhesion, and humidity resistance, eliminating the need for pre-heating and offering better handling characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If unhydrolysed starch is used in hair fixative formulations, then film-forming properties and adhesion are achieved, but pre-heating at 75-85°C is required and water solubility is limited
Solution Approach 1:
The patent applies parameter changes by hydrolyzing the starch to modify its molecular structure and reduce its degree of polymerization. This chemical modification changes the physical properties of starch, enabling it to form films without pre-heating while maintaining adhesion. The hydrolysis process converts unhydrolysed starch into hydrolysed starch with improved water solubility and eliminated gelatinization requirements.
2Strength
If high amylose content starch is used, then film strength and elasticity are improved, but the composition requires specific amylose-amylopectin ratios (25-50 parts amylose, 75-50 parts amylopectin) for optimum performance
Solution Approach 1:
The patent utilizes parameter changes by controlling the hydrolysis degree (dextrose equivalent) to transform the starch structure. This approach allows the use of hydrolysed starch without requiring specific amylose-amylopectin ratios, as the hydrolysis process modifies the molecular architecture to achieve film-forming capability independently of the original starch composition.
3Reliability
If gelatinous starch dispersion is used, then film-forming capability is achieved, but the product has limited water solubility and requires pre-heating treatment
Solution Approach 1:
The patent applies parameter changes through hydrolysis to fundamentally alter the starch molecular structure. This chemical modification increases water solubility by breaking down the complex starch polymers into smaller units that can dissolve without gelatinization, while simultaneously maintaining or enhancing film-forming capability through the modified molecular configuration.
4Reliability
If cationically modified starch is used to improve adhesion and anti-static properties, then hair fixation and flyaway prevention are enhanced, but the modification process complexity increases
Solution Approach 1:
The patent applies composite materials by combining hydrolysed starch with cationic modifiers to create a composite polymer structure. This composite approach integrates the film-forming and adhesive properties of starch with the electrostatic and anti-static properties of cationic groups, achieving multiple functions simultaneously while streamlining the overall formulation process.
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 cationically modified hydrolysed starch composition demonstrates enhanced curl retention, reduced tackiness, improved humidity resistance, and better tactile properties compared to market standards, making it a more effective hair fixative.
Implementation Method 1
The styling process involves application of the film-forming agent to deposit a coating on the hair which remains after drying. This film is required to be flexible and it mechanically hinders the hairs movement back to its natural shape.
Implementation Method 2
The hygroscopic properties of the film should be as low as possible to protect the hair from moisture uptake from the environment hence, hindering the disruption of the hydrogen bonds within the hair, leading to a loss of styling effect.
Implementation Method 3
UK patent 1,015,935 describes the use of tertiary amino alkyl esters of cornstarch... UK patent 1,285,547 discloses the use of starch modified with tertiary amine reagents to produce quaternised starch.
Implementation Method 4
the present invention uses hydrolysed starch which removes the need for this pre-heat treatment. The hydrolysis also renders a product which forms a low viscosity/free-flowing solution that is easier to handle
Data Source
AI summary
The present invention relates to a hair fixative composition comprising a canonically modified hydrolysed starch and especially canonically modified hydrolysed starches, hydrolysed to the extend of having a dextrose equivalent of 1 to 6.