Sulfated Polysaccharide Derivatives for Laundry Detergents
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current detergent compositions often rely on non-renewable petroleum-based ingredients, and there is a need for improved cleaning performance from renewable resources, particularly in terms of rheological stability and water hardness sensitivity.
Innovation Solution
Development of polysaccharide derivatives, such as poly alpha-1,3-glucan, poly alpha-1,6-glucan, and poly alpha-1,3-1,6-glucan, substituted with sulfate, sulfonate, or thiosulfate groups, which provide enhanced solubility and viscosity stability under varying ionic strength and pH conditions, suitable for use in fabric and home care products.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If carboxymethyl cellulose derivatives are used as rheology modifiers, then solubility in aqueous applications is improved, but rheological stability decreases
Solution Approach 1:
The patent changes the chemical parameter of the polysaccharide by substituting carboxymethyl groups with sulfonated or sulfated groups, which have different pKa values and ionic characteristics. This parameter change resolves the contradiction by providing both high solubility and improved rheological stability through the unique properties of sulfonated/sulfated groups that create separated ion pairs and reduce susceptibility to multivalent ion complexing.
Solution Approach 2:
The invention creates a composite material by combining polysaccharide backbone with sulfonated or sulfated functional groups. This composite structure integrates the solubility benefits of charged groups with the rheological stability of the polysaccharide framework, overcoming the limitations of carboxymethyl cellulose derivatives.
2Quantity of substance
If carboxymethyl cellulose derivatives are used, then enhanced solubility is achieved, but sensitivity to water hardness increases
Solution Approach 1:
The patent changes the chemical parameter from carboxymethyl groups to sulfonated or sulfated groups, which have lower pKa values and form separated ion pairs. This parameter change reduces the interaction with multivalent ions in hard water, thereby decreasing water hardness sensitivity while maintaining enhanced solubility.
3Adaptability or versatility
If renewable resources are used instead of petroleum feedstocks, then sustainability is improved, but cleaning performance may be reduced
Solution Approach 1:
The patent modifies the chemical parameters of renewable polysaccharides by introducing sulfonated or sulfated groups, which enhance the cleaning performance through improved rheological stability and water hardness insensitivity. This parameter change allows renewable resources to achieve performance comparable to or exceeding petroleum-based ingredients.
Solution Approach 2:
The invention creates composite materials by combining renewable polysaccharide backbones with sulfonated or sulfated functional groups, producing a material that exhibits both the sustainability of renewable resources and the enhanced cleaning performance associated with improved rheological stability and hardness insensitivity.
Data Source
AI summary
The disclosure relates to products including a polysaccharide derivative wherein the polysaccharide derivative includes a polysaccharide substituted with at least one of: a) at least one sulfate group; b) at least one sulfonate group; c) at least one thiosulfate group; or d) a combination thereof; wherein the polysaccharide is poly alpha-1,3-glucan, poly alpha-1,6-glucan, poly alpha-1,3-1,6-glucan, or a mixture thereof; and the polysaccharide derivative has a degree of substitution of about 0.001 to about 3. The products can be useful as anti-deposition and/or anti-graying agents in laundry detergents, and in home care applications.