Soil Release Polymer Structure for Liquid Detergent Compatibility
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Solution Overview
Problem
Existing soil release polymers used in laundry detergents, such as those described in JP2015105373, fail to provide sufficient formulation compatibility and soil release performance when incorporated into liquid laundry detergents.
Innovation Solution
A soil release polymer comprising a capped polyoxyalkylene end block connected to a polyester segment with alternating —B1-A-B2— and —R— units, where B1 and B2 are OC(O) and C(O)O groups, and R is a divalent alkylene radical, is developed for use in laundry detergent compositions, enhancing soil release properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If existing soil release polymers (such as those described in JP2015105373) are used, then bio-derived material utilization is achieved, but formulation compatibility and soil release performance in liquid laundry detergents are insufficient
Solution Approach 1:
The patent modifies the chemical structure parameters of the polymer by incorporating specific polyoxyalkylene end blocks with controlled lengths and compositions into the polyester backbone. This structural parameter change enables the polymer to achieve both bio-derived status and improved formulation compatibility in liquid detergents, resolving the contradiction between ease of manufacture and reliability.
Solution Approach 2:
The invention creates a composite polymer structure combining polyester segments (for soil release functionality) with polyoxyalkylene end blocks (for formulation compatibility). This composite approach integrates the advantages of different material types, allowing the polymer to meet both manufacturing requirements and performance specifications in liquid laundry detergent formulations.
2Adaptability or versatility
If polymers with soil release promoting properties are synthesized from bio-derived materials, then environmental sustainability is improved, but sufficient soil release performance and formulation compatibility in liquid detergents are not achieved
Solution Approach 1:
The patent optimizes specific structural parameters including the length of polyoxyalkylene end blocks (n=1-50), the composition ratio of different blocks, and molecular weight characteristics. These parameter adjustments maintain the bio-derived sustainable nature while achieving the required soil release performance and formulation compatibility in liquid detergent systems.
Solution Approach 2:
The invention applies local quality by赋予ing different functional characteristics to different parts of the polymer molecule: the polyester backbone provides soil release properties while the polyoxyalkylene end blocks provide formulation compatibility. This localized functional differentiation allows the single polymer to satisfy multiple contradictory requirements simultaneously.
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 polymer effectively improves stain adhesion reduction and ease of stain removal when incorporated into liquid laundry detergents, demonstrating improved formulation compatibility and soil release performance compared to prior art.
Implementation Method 1
Soil release polymers (SRPs) adsorb to fibre surfaces during the wash process, modifying their surface properties and leading to reduced stain adhesion in subsequent wear and easier stain removal.
Data Source
AI summary
The invention provides a polymer providing soil release properties (also termed a “soil release polymer” or SRP) when incorporated in a laundry detergent composition, the polymer comprising a capped polyoxyalkylene end block connected to a polyester segment; the polyester segment comprising alternating —B1-A-B2— and —R— units; in which B1 and B2 are each independently selected from —OC(O)— and —C(O)O— groups; A is a 2,5-furanylene ring and R is a divalent alkylene radical. The polymer provides good compatibility, stability and cleaning performance when incorporated into a laundry detergent composition, preferably a liquid laundry detergent composition, comprising one or more detersive surfactants.