Cationic Dextran Polymer for Fragrance Deposition
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Solution Overview
Problem
There is a continuing need for fabric care compositions that offer a desirable balance of performance properties, particularly enhanced fragrance deposition onto fabrics.
Innovation Solution
A fabric care composition that includes water, a cleaning surfactant, a fragrance, and a deposition aid polymer, where the deposition aid polymer is a cationic dextran polymer with a dextran base polymer functionalized with quaternary ammonium groups, enhancing fragrance deposition onto fabrics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a deposition aid polymer is added to enhance fragrance deposition, then fragrance deposition is improved, but viscosity of the composition increases
Solution Approach 1:
The patent applies parameter changes by carefully controlling the degree of substitution (DS) of quaternary ammonium groups on the dextran polymer (DS between 0.01 and 0.245) and the molecular weight of the dextran base polymer (50,000 to 3,000,000 Daltons). These parameter optimizations enable effective fragrance deposition while limiting viscosity increase to less than 1000 cP at 25°C.
2Manufacturing precision
If quaternary ammonium groups are added to dextran polymer, then fragrance deposition is improved, but complexity of polymer synthesis increases
Solution Approach 1:
The patent applies local quality by introducing quaternary ammonium groups at specific locations on the dextran polymer structure through controlled substitution. The degree of substitution is maintained between 0.01 and 0.245, creating localized cationic sites that enhance fragrance deposition without requiring complete modification of the polymer structure, thus simplifying synthesis.
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 a favorable balance of performance properties, including enhanced fragrance deposition and soil anti-redeposition, without significantly thickening the fabric care composition.
Implementation Method 1
a deposition aid polymer, wherein the deposition aid polymer is a cationic dextran polymer, comprising a dextran base polymer functionalized with quaternary ammonium groups
Implementation Method 2
the quaternary ammonium groups include (i) a quaternary ammonium group of formula (II) bound to a pendent oxygen on the dextran base polymer and (ii) a quaternary ammonium group of formula (III) bound to a pendent oxygen on the dextran base polymer
Data Source
AI summary
A fabric care composition is provided, comprising: water; fragrance; and deposition aid polymer, comprising dextran base polymer functionalized with quaternary ammonium groups; wherein quaternary ammonium groups include a quaternary ammonium group of formula (II) bound to a pendent oxygen on the dextran base polymer and a quaternary ammonium group of formula (III) (II) (III); wherein is pendent oxygen on dextran base polymer; wherein X is a divalent linking group; wherein R2 is selected from C1-4 alkyl group; wherein R3 is selected from C1-4 alkyl group; and wherein R4 is selected from linear or branched C8-20 alkyl group; wherein degree of substitution, DS(II), of formula (II) on deposition aid polymer is 0.01 to 0.245; wherein degree of substitution, DS(III), of formula (III) on deposition aid polymer is >0 to 0.05; and wherein deposition aid polymer enhances deposition of fragrance onto fabric relative to otherwise identical formulation without deposition aid polymer.