Renewable Polyester Surfactant Composition for Synthetic Fabric Soil Release
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Solution Overview
Problem
Existing polyester soil release polymers are predominantly fossil-based, which raises environmental concerns, and there is a need for alternatives that deliver comparable performance using renewable raw materials.
Innovation Solution
Development of polyester soil release polymers based on pyridine dicarboxylic acid derived from renewable sources, such as lignin, which effectively deposit on synthetic fabrics like polyester and polycotton, enhancing soil release benefits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fossil-based terephthalic acid is used to make polyester soil release polymers, then good soil release performance is achieved, but environmental sustainability deteriorates
Solution Approach 1:
The invention changes the chemical structure parameter of the polyester by replacing terephthalic acid units with pyridine dicarboxylic acid units. This structural substitution allows the polymer to maintain its soil release functionality while being derived from renewable biomass sources, thus resolving the contradiction between performance and environmental sustainability
Solution Approach 2:
The invention uses renewable biomass resources (like lignin) as feedstocks to create biodegradable polyester alternatives. These polymers are designed to be environmentally friendly and potentially biodegradable, replacing persistent fossil-based materials with sustainable, renewable resources
2Object-affected harmful factors
If pyridine dicarboxylic acid-based polyester is used as renewable alternative, then environmental sustainability is improved, but soil release performance may deteriorate
Solution Approach 1:
The invention optimizes specific parameters of the pyridine dicarboxylic acid-based polyester, including the type of pyridine ring substitution pattern (2,3-, 2,4-, 2,5-, or 2,6-dicarboxylic acid), the glycol component (ethylene glycol, propylene glycol, or their mixtures), and the molar ratios of components. These parameter adjustments ensure the polymer achieves effective deposition on synthetic fabrics while maintaining renewable sourcing
Solution Approach 2:
The invention introduces specific structural features at local levels: the pyridine ring structure with specific substitution patterns, the glycol chain length (C2-C12 alkylene), and terminal groups with specific alkyl chains. These localized structural qualities enable the polymer to interact effectively with synthetic fabric surfaces, achieving soil release performance comparable to fossil-based polymers
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 use of pyridine dicarboxylic acid-derived polyester polymers provides effective soil release, reduced soil deposition, improved wicking properties, and reduced malodor, while being environmentally sustainable.
Implementation Method 1
In the washing process, soil release polymer can deposit on fibers, which change the surface properties of fabric
Data Source
AI summary
A fabric and home care composition including surfactant and a polyester.