Aerosol Antiperspirant Sustainability Index Optimization
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Solution Overview
Problem
Aerosol antiperspirant products face challenges in achieving environmental sustainability while maintaining efficacy and avoiding valve blockage and sensory issues, particularly in balancing VOC, antiperspirancy active, and metal usage without disrupting consumer spray habits.
Innovation Solution
An antiperspirant aerosol product with a Combined Sustainability Index (CSI) of less than 3.0, comprising a propellant and a base composition with a basic aluminium chloride compound, water-soluble calcium salt, and an amino acid, optimized for reduced aluminium, VOC, and metal usage, along with a dispenser design for efficient spray rates and minimal environmental impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional aerosol antiperspirant formulations are used to maintain efficacy and consumer spray habits, then antiperspirant performance and consumer acceptance are improved, but environmental sustainability deteriorates due to higher VOC, aluminium, and metal usage
Solution Approach 1:
The patent applies parameter changes by modifying the chemical composition parameters of the aerosol antiperspirant formulation. Specifically, it uses basic aluminium chloride compounds with controlled hydration levels (Al2OH4.4Cl1.6 to Al2OH4.9Cl1.1) and optimizes the ratio of aluminium to chloride, thereby reducing the environmental impact while maintaining antiperspirant efficacy through precise chemical parameter adjustment
Solution Approach 2:
The patent employs composite materials by combining basic aluminium chloride compounds with water-soluble calcium salts and amino acids in a synergistic formulation. This composite approach enhances antiperspirant performance while the specific composition ratios control the environmental footprint, achieving both efficacy and sustainability goals
2Object-affected harmful factors
If reduced spray rate is implemented to lower aluminium and VOC expulsion, then environmental sustainability is improved, but valve blockage risk increases
Solution Approach 1:
The patent resolves the valve blockage risk by changing the physical parameters of the aluminium compound formulation. By using basic aluminium chloride compounds with specific hydration levels and controlling particle size distribution, the formulation maintains low spray rates for environmental sustainability while preventing valve blockage through optimized material properties
Solution Approach 2:
The patent introduces water-soluble calcium salts and amino acids as intermediary substances that facilitate the delivery of aluminium compounds at low spray rates without causing valve blockage. These intermediaries act as carriers and modifiers that enable controlled release while maintaining formulation integrity and preventing deposition in the valve mechanism
3Object-affected harmful factors
If low spray rate is used to minimize metal usage, then environmental sustainability is improved, but consumer spray habits are disrupted
Solution Approach 1:
The patent maintains consumer spray habits by adjusting the operational parameters of the aerosol dispenser rather than changing the fundamental spray mechanism. By optimizing the valve characteristics and propellant selection, the system delivers reduced metal content at conventional spray durations and intensities, allowing consumers to use the product as expected without behavioral changes
4Reliability
If high aluminium concentration is used to ensure antiperspirancy, then efficacy is improved, but white marks on skin and clothing increase
Solution Approach 1:
The patent reduces white marks by changing the chemical parameters of the aluminium compound formulation. By using basic aluminium chloride compounds with controlled hydration and optimizing the aluminium to chloride ratio, the formulation maintains sufficient antiperspirancy activity while minimizing the deposition of visible white marks on skin and clothing surfaces
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 solution provides effective antiperspirancy with improved environmental sustainability and minimized valve blockage, maintaining consumer acceptance by matching conventional spray habits and reducing white marks and metal usage, while ensuring efficient dispensing properties.
Implementation Method 1
an antiperspirant aerosol product comprising (A) an anhydrous antiperspirant aerosol composition consisting of a propellant and a base composition
Implementation Method 2
an aerosol dispenser comprising: a container body, an aerosol valve, and a valve actuator
Data Source
AI summary
An antiperspirant aerosol product having good environmental sustainability and comprising an anhydrous antiperspirant aerosol composition comprising an AP active comprising a basic aluminium chloride compound 5 of formula Al2OH4.4Cl1.6 to Al2OH4.9Cl1.1, water soluble calcium salt and amino acid, and an aerosol dispenser comprising a container body, an aerosol valve, and a valve actuator; characterised in that the product has a Combined Sustainability Index (CSI) of less than 3.0, where: CSI = AlF+VOCF+MCB/N10 AlF being the weight (in centigrams) of aluminium expelled per spray; VOCF being the weight of VOC (in grams) expelled per spray; MCB being the weight of metal (in grams) in the container body; and N is the number of spray applications possible from the fully charged product, each figure being based on a spray duration of 2 seconds.