Shampoo Composition with Alkyl-Modified Polymer and Methylcellulose

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Solution Overview

Problem

Existing shampoo compositions lack improved aesthetics and performance, particularly in terms of rinse-off properties, stability, and consumer acceptability.

Innovation Solution

A shampoo composition comprising C6-30 alkyl-modified (meth)acrylate polymer, methylcellulose, and silicone, with specific concentrations and combinations of suspending agents, pearlescers, and cationic deposition polymers to enhance rinse-off properties and stability while maintaining aesthetic appeal.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If conventional shampoo compositions are used, then basic cleansing function is provided, but rinse-off properties and aesthetic appeal are insufficient

Engineering Contradiction:

Improverinse-off propertiesVSAvoidstability and aesthetic appeal

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The shampoo composition employs a composite system combining C6-30 alkyl-modified (meth)acrylate polymer (Aculyn 28), methylcellulose (Methocel), and silicone components. This multi-component polymer system provides synergistic effects where the alkyl-modified polymer delivers superior rinse-off properties, methylcellulose contributes to stability and viscosity control, and silicone enhances aesthetic appeal and conditioning, collectively resolving the contradiction between rinse-off performance and stability.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The invention utilizes specific parameter ranges for each component: C6-30 alkyl chain length (optimally C18-C24), polymer concentration (0.01-5% wt, preferably 0.05-1% wt), and methylcellulose concentration (0.01-3% wt, preferably 0.15-0.25% wt). These parameter optimizations ensure the composition achieves both excellent rinse-off properties and stable aesthetic appearance, resolving the technical contradiction.

Inventive Principle:

Principle #35Parameter changes

2Ease of operation

If polymer concentration is increased to improve rinse-off properties, then conditioning effect is enhanced, but formulation stability and aesthetics may deteriorate

Engineering Contradiction:

Improverinse-off propertiesVSAvoidformulation stability

Core Design Contradiction:

Ease of operationVSStability of the object's composition

Solution Approach 1:

The patent specifies optimal polymer concentration ranges (0.01-5% wt, more preferably 0.05-1% wt) to achieve the desired balance between rinse-off properties and formulation stability. This parameter optimization prevents excessive polymer concentration that would compromise stability while ensuring sufficient conditioning effect.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The composite system distributes functional requirements across multiple components: alkyl-modified polymer for rinse-off, methylcellulose for stability and viscosity, and silicone for aesthetics. This distribution allows each component to operate within optimal concentration ranges, preventing any single component from compromising formulation stability.

Inventive Principle:

Principle #40Composite materials

3Reliability

If conventional polymer systems are used, then formulation simplicity is maintained, but consumer acceptability and performance are insufficient

Engineering Contradiction:

Improveconsumer acceptabilityVSAvoidformulation complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The invention adopts a composite polymer system with three main components (alkyl-modified (meth)acrylate, methylcellulose, and silicone) to achieve superior consumer acceptability and performance. While this increases formulation complexity compared to conventional single-polymer systems, the use of commercially available components (Aculyn 28, Methocel) and standardized concentration ranges maintains manufacturing feasibility.

Inventive Principle:

Principle #40Composite materials

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 provides improved rinse-off properties, stability, and aesthetic appeal, ensuring better consumer satisfaction and performance.

Implementation Method 1

C6-30 alkyl-modified (meth)acrylate polymer... provides better rinse-off properties, the alkyl group comprises from 6 to 30 carbons

Methodology Applied

Scientific EffectHydrophobic interaction: Hydrophobe

Implementation Method 2

METHOCEL cellulose ethers are an extensive family of methylcellulose (MC) and hydroxypropylmethylcellulose (HPMC) polymers that are used globally in many personal care products. They are primarily used as polymeric surfactants, thickeners in liquid formulations

Methodology Applied

Scientific EffectThickening: