Quaternized Hyperbranched Polymers for Clear Shampoo Formulations

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Quaternized hyperbranched polymers used in hair care compositions often render shampoos turbid, requiring pearling agents to mask turbidity, and are not easily accessible in high purity or cosmetically acceptable colors, which affects consumer acceptance and product quality.

Innovation Solution

The development of quaternized hyperbranched polymers obtained through the condensation of 2-dodecen-1-ylsuccinic anhydride, diisopropanolamine, and N,N-bis[3-(dimethylamino)propyl]amine, followed by quaternization with sodium 2-chloroacetate, which allows for the formulation of clear shampoo preparations with improved viscosity and purity, eliminating the need for pearling agents and achieving a cosmetically acceptable color.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional quaternized hyperbranched polymers are used in shampoo formulations, then hair care benefits are achieved, but the shampoo becomes turbid requiring pearling agents

Engineering Contradiction:

Improvehair care benefitsVSAvoidturbidity

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The invention changes the chemical parameters of the hyperbranched polymer by using specific monomers (N,N-bis[3-(dimethylamino)propyl]amine, diisopropanolamine, and 2-dodecen-1-ylsuccinic anhydride) and controlling the quaternization degree (50-100%, preferably 70-90%). These parameter changes result in polymers that do not cause turbidity in shampoo formulations, eliminating the need for pearling agents while maintaining hair care benefits

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention creates a composite approach by combining specific hyperbranched polymer structure with controlled quaternization to achieve both hair care functionality and optical clarity. The polymer composition is designed to be compatible with clear shampoo systems, effectively replacing conventional polymers that cause turbidity

Inventive Principle:

Principle #40Composite materials

2Reliability

If conventional quaternizedhyperbranched polymers are used, then conditioning effects are achieved, but the shampoo viscosity becomes insufficient

Engineering Contradiction:

Improveconditioning effectsVSAvoidviscosity

Core Design Contradiction:

ReliabilityVSForce

Solution Approach 1:

The invention optimizes the molecular weight of thehyperbranched polymer (1000-500,000 g/mol, preferably 5000-100,000 g/mol) and controls the quaternization degree to achieve the desired balance between conditioning effects and viscosity. These parameter adjustments ensure adequate shampoo viscosity while maintaining excellent hair conditioning performance

Inventive Principle:

Principle #35Parameter changes

3Productivity

If standard hyperbranched polymer synthesis is used, then polymer production is achieved, but high purity and cosmetically acceptable color are not obtained

Engineering Contradiction:

Improvepolymer productionVSAvoidpurity and color

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

The invention uses specifically selected monomers and optimized synthesis conditions to producehyperbranched polymers with high purity and light yellow to slightly brownish color. The use of N,N-bis[3-(dimethylamino)propyl]amine as a key monomer and controlled reaction conditions (temperature, stoichiometry) ensures minimal discoloration and high purity, meeting cosmetic standards

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention employs readily available, commercially accessible monomers that are easy to handle and process, simplifying the manufacturing process while achieving high purity products. The synthesis route is designed to be straightforward and scalable, producing cosmetically acceptable colors without requiring complex purification steps

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

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 resulting quaternized hyperbranched polymers enable the creation of clear, high-purity, and cosmetically acceptable hair care products with enhanced viscosity, addressing the issues of turbidity and color, thereby improving consumer acceptance and product quality.

Implementation Method 1

preparation of ahyperbranched polymer having dimethylamino end groups by condensation of 2-dodecen-1-ylsuccinic anhydride, diisopropanolamine and N,N-bis[3-(dimethylamino)propyl]amine

Methodology Applied

Scientific EffectCondensation reaction:

Implementation Method 2

quaternization of the dimethylamino end-groups to end groups of formula (I)

Methodology Applied

Scientific EffectQuaternization:

Data Source

PatentUS9539197B2Hair care polymer

Publication Date: 2017.01.10 DSM IP ASSETS BV

AI summary

The invention relates to specific quaternized hyperbranched polymers having end-groups of formula (I) characterized in that said quaternized hyperbranched polymer is obtainable by preparation of a hyperbranched polymer having dimethylamino end groups by condensation of 2-dodecen-1-ylsuccinic anhydride, diisopropanolamine and N,N-bis[3-(dimethylamino)propyl]amine followed by quaternization of the dimethylamino end-groups to end groups of formula (I). Furthermore, the invention is directed to clear shampoo preparations comprising such quaternized hyperbranched polymers.