Anhydrous Antiperspirant Using PEG Polyelectrolyte Salt

Solution Overview

Problem

Incorporating Dead Sea salt into anhydrous antiperspirant compositions is challenging due to its gritty texture in stick compositions and valve blockage in aerosol compositions, and it is insoluble in common liquid components, making it difficult to dissolve without affecting the aluminum and/or zirconium antiperspirant actives.

Innovation Solution

An anhydrous antiperspirant composition is developed using a suspension of 1 to 50% aluminum and/or zirconium containing antiperspirant active with a poly(ethylene glycol) solution of a polyelectrolyte salt comprising sodium, potassium, magnesium, calcium, chloride, and bromide ions, where the sodium to other cation weight ratio is less than 3:2, allowing for insolubility in the carrier substance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If Dead Sea salt is incorporated into anhydrous antiperspirant compositions, then the composition delivers health promoting benefits, but the salt causes gritty texture in stick compositions and valve blockage in aerosol compositions

Engineering Contradiction:

Improvehealth promoting benefitsVSAvoidtexture and dispensability

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The patent uses polyethylene glycol (PEG) as an intermediary carrier substance to dissolve Dead Sea salt. The PEG solution acts as a mediator that allows the salt to be incorporated into the antiperspirant composition without causing gritty texture or valve blockage, while still delivering the health benefits of the salt to the skin.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent changes the physical state of Dead Sea salt from solid particles to dissolved form by using PEG as a solvent. This parameter change from solid to dissolved state eliminates the gritty texture and valve blockage issues while maintaining the beneficial properties of the salt.

Inventive Principle:

Principle #35Parameter changes

2Ease of operation

If Dead Sea salt is dissolved into the composition, then the texture and dispensability improve, but the salt is insoluble in common liquid components and affects the aluminum and/or zirconium antiperspirant actives

Engineering Contradiction:

Improvetexture and dispensabilityVSAvoidsolubility and active ingredient effectiveness

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent uses polyethylene glycol (PEG) as an intermediary carrier substance to dissolve Dead Sea salt. The PEG solution acts as a mediator that allows the salt to be incorporated into the antiperspirant composition without causing gritty texture or valve blockage, while still delivering the health benefits of the salt to the skin.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent changes the physical state of Dead Sea salt from solid particles to dissolved form by using PEG as a solvent. This parameter change from solid to dissolved state eliminates the gritty texture and valve blockage issues while maintaining the beneficial properties of the salt.

Inventive Principle:

Principle #35Parameter changes

3Ease of operation

If the particle size of Dead Sea salt is reduced, then the gritty texture is minimized, but the salt remains hygroscopic and deliquescent making it impossible to mill in normal atmosphere

Engineering Contradiction:

ImprovetextureVSAvoidmillability

Core Design Contradiction:

Ease of operationVSEase of manufacture

Solution Approach 1:

The patent changes the physical state of Dead Sea salt from solid particles to dissolved form by using PEG as a solvent. This parameter change from solid to dissolved state eliminates the gritty texture and valve blockage issues while maintaining the beneficial properties of the salt.

Inventive Principle:

Principle #35Parameter changes

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 effectively reduces perspiration while maintaining sensory and visual appeal, preventing nozzle blockage in aerosol products and ensuring the effectiveness of the antiperspirant actives, providing both physical and emotional benefits to consumers.

Implementation Method 1

a poly(ethylene glycol) solution of a polyelectrolyte salt comprising sodium, potassium, magnesium, calcium, chloride and bromide ions

Methodology Applied

Scientific EffectSolvation: Solvation

Implementation Method 2

They serve to reduce perspiration, particularly following application to the surface of the body

Methodology Applied

Scientific EffectOcclusion:

Implementation Method 3

activated aluminium tetrachlorohydrex-Gly salts and anhydrous antiperspirant aerosol compositions comprising activated aluminium chlorohydrate salts

Methodology Applied

Scientific EffectKeratolytic action:

Implementation Method 4

a carrier substance in which the antiperspirant active is insoluble

Methodology Applied

Scientific EffectSuspension: Suspension

Data Source

PatentUS9173833B2Anhydrous antiperspirant compositions

Publication Date: 2015.11.03 CONOPCO INC

AI summary

An antiperspirant composition comprising a suspension of from 1 to 50% of an aluminium and/or zirconium containing antiperspirant active, a carrier substance in which the antiperspirant active is insoluble, and a poly(ethylene glycol) solution of a polyelectrolyte salt comprising sodium, potassium, magnesium, calcium, chloride and bromide ions, the weight ratio of sodium to the other named cations being less than 3:2 and the weight ratio of the bromide to chloride anion being greater than 1:99, in said solution.