Transparent Shampoo with Soluble Scalp Actives
Solution Overview
Problem
Conventional anti-dandruff shampoos are typically opaque or pearlescent due to the combination of anionic and cationic polymers, which fails to meet consumer demand for a clear, effective product.
Innovation Solution
A personal care composition comprising 12-25% surfactants, 0.01-10% soluble scalp health actives, 0.1-4% thickening polymers, and 0.01-0.8% cationic polymers, with a pH of 4.5-6, specifically formulated to achieve a clear and low haze value.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional anionic and cationic polymers are combined in anti-dandruff shampoo formulations, then anti-dandruff efficacy and usage experience are improved, but the composition becomes opaque or pearlescent
Solution Approach 1:
The patent changes the chemical parameters of the polymers by selecting specific anionic thickening polymers (such as polyacrylate, polyacrylamide, or carbomers) and specific cationic polymers (such as polyquaternium-10, polyquaternium-24, or polyquaternium-67), and by controlling their concentration ratios and interaction conditions, achieving both clarity and efficacy
Solution Approach 2:
The patent creates a composite polymer system combining specific anionic and cationic polymers in controlled ratios, where the composite formulation maintains compatibility and clarity while providing the desired anti-dandruff performance and usage experience
2Reliability
If soluble scalp health actives are incorporated into the shampoo formulation, then anti-dandruff performance is enhanced, but the composition may become hazy or unclear
Solution Approach 1:
The patent optimizes the concentration of soluble scalp health actives (such as ketoconazole, piroctone olamine, or azoxystrobin) within specific ranges and controls the formulation parameters including pH, surfactant types and concentrations, and polymer ratios to maintain clarity while ensuring effective delivery of the actives
3Stability of the object's composition
If thickening polymers are added to increase viscosity, then the shampoo achieves appropriate consistency, but the composition becomes opaque
Solution Approach 1:
The patent selects specific thickening polymers with controlled molecular weights and charges, and optimizes their concentration levels along with the interaction parameters with cationic polymers and surfactants to achieve the desired viscosity while maintaining optical clarity
Solution Approach 2:
The patent uses specific surfactant systems and controlled pH conditions as intermediaries that mediate between the thickening polymers and the rest of the formulation, allowing the polymers to provide viscosity without causing opacity through proper interaction management
Data Source
AI summary
The present invention is directed to a personal care composition comprising from about 12% to about 25% of one or more surfactants; from about 0.01% to 10% of one or more soluble scalp health active; from about 0.1% to about 4% of a thickening polymer wherein the thickening polymer is selected from the group consisting of homopolymers based on acrylic acid, methacrylic acid or other related derivatives, alkali swellable and hydrophobically-modified alkali swellable acrylic copolymers or methacrylate copolymers, soluble crosslinked acrylic polymers, associative polymeric thickeners and mixtures thereof; from 0.01% to 0.8% of a cationic polymer; wherein the personal care composition has a pH of about 4.5 to about 6 and wherein the personal care composition has a Haze value less than or equal to 25.