Decyl Glucoside Shampoo Composition With Cationic Guar Viscosity

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Solution Overview

Problem

Existing shampoo compositions using anionic surfactants like sodium lauryl sulfate and sodium laureth sulfate cause harshness and dryness, leading to poor consumer acceptance and inadequate hair conditioning benefits, while non-ionic surfactants with thickening polymers lack consumer-desired viscosity and conditioning effects.

Innovation Solution

A shampoo composition comprising decyl glucoside as a non-ionic surfactant and a cationic guar polymer with a molecular weight of 800,000g/mol to 5,000,000g/mol and charge density of 0.1 meg/g to 2.5 meg/g, providing a viscosity of 0.3 Pa.s to 8.0 Pa.s and delivering consumer-desired conditioning benefits.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If anionic surfactants (sodium lauryl sulfate, sodium laureth sulfate) are used for cleaning, then cleaning effectiveness is improved, but hair and skin dryness and harshness increase

Engineering Contradiction:

Improvecleaning effectivenessVSAvoidhair and skin dryness

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent changes the chemical nature of the surfactant from anionic to non-ionic, specifically using decyl glucoside. This parameter change maintains cleaning effectiveness while eliminating the harsh drying effects associated with anionic surfactants like sodium lauryl sulfate

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates a composite formulation combining non-ionic surfactant (decyl glucoside) with cationic guar polymer. This composite approach provides both effective cleaning and conditioning benefits, addressing the dryness issue while maintaining cleaning performance

Inventive Principle:

Principle #40Composite materials

2Object-affected harmful factors

If non-ionic surfactants are used to reduce harshness, then mildness is improved, but viscosity and conditioning benefits decrease

Engineering Contradiction:

ImproveharshnessVSAvoidviscosity

Core Design Contradiction:

Object-affected harmful factorsVSEase of operation

Solution Approach 1:

The patent combines non-ionic surfactant (decyl glucoside) with cationic guar polymer in a composite formulation. The cationic guar polymer provides the necessary viscosity and conditioning benefits that non-ionic surfactants alone cannot deliver, while maintaining the mildness advantage

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent specifies precise parameters for the cationic guar polymer (molecular weight 800,000-5,000,000 g/mol and charge density 0.1-2.5 meq/g) to optimize both viscosity and conditioning performance while maintaining phase stability with the non-ionic surfactant system

Inventive Principle:

Principle #35Parameter changes

3Ease of operation

If non-ionic surfactants are combined with charged polymers for thickening, then viscosity is improved, but phase stability deteriorates

Engineering Contradiction:

ImproveviscosityVSAvoidphase stability

Core Design Contradiction:

Ease of operationVSStability of the object's composition

Solution Approach 1:

The patent optimizes specific parameters including the molecular weight (800,000-5,000,000 g/mol) and charge density (0.1-2.5 meq/g) of the cationic guar polymer to achieve phase stability with decyl glucoside. These parameter changes ensure compatibility between the non-ionic surfactant and charged polymer

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The cationic guar polymer acts as an intermediary that bridges the non-ionic surfactant system with the desired functional properties. It provides viscosity enhancement and conditioning benefits while maintaining phase stability through its specific molecular characteristics

Inventive Principle:

Principle #24Intermediary (Mediator)

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 phase stability, consumer-desired viscosity, and effective cleaning with improved moisture and slip feel, while avoiding the harshness associated with anionic surfactants.

Implementation Method 1

a cationic polysaccharide, wherein said cationic polysaccharide is hydrophobically modified with a hydrophobic substituent and a cationic substituent

Methodology Applied

Scientific EffectHydrophobic interaction:

Implementation Method 2

Application and washing of the soiled hair with a shampoo composition can restore hair to a clean and attractive appearance by removing oil and other soils from the hair

Methodology Applied

Scientific EffectSurfactant action: Surfactant

Data Source

PatentEP4149416B1Shampoo composition comprising decyl glucoside and a cationic guar

Publication Date: 2026.01.21 PROCTER & GAMBLE CO

AI summary

A shampoo composition comprising a nonionic surfactant, and a cationic guar having a weight average molecular weight of from about 800,000g/mol to about 5,000,000g/mol, and a charge density of from about 0.1 meg/g to about 2.5 meg/g. The shampoo is phase stable and delivers a consumer desirable in use viscosity while still providing cleaning, moisture and slip feel hair benefits.