Anionic Polyester Composition for Biodegradable Soil Release
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Solution Overview
Problem
Anionic soil release polymers used in fabric and home care formulations have poor biodegradability, limiting their application in green and sustainable laundry detergent compositions.
Innovation Solution
Development of polyesters comprising specific structural units and terminal groups, which enhance biodegradability and washing performance, using structural units derived from terephthalic acid, 5-sulfoisophthalic acid, and polyalkylene glycols, with terminal groups like poly(ethylene glycol) monomethyl ether, to create a fabric and home care composition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If anionic soil release polymers are used in fabric and home care formulations, then washing performance is improved, but biodegradability deteriorates
Solution Approach 1:
The patent applies composite materials by combining polyalkylene glycol units with aromatic carboxylic acid units to create a copolymer structure. This composite approach integrates the soil release properties of one component with the biodegradability of another, resolving the contradiction between washing performance and environmental sustainability.
Solution Approach 2:
The patent changes the chemical composition parameters of the polymer by incorporating biodegradable aromatic carboxylic acid units (such as terephthalic acid, isophthalic acid, and 5-sulfoisophthalic acid) into the polyalkylene glycol chain. This parameter modification maintains the essential soil release functionality while enabling biodegradation, thus improving the environmental profile without sacrificing washing performance.
2Reliability
If conventional anionic polymers are used, then soil release performance is achieved, but environmental sustainability deteriorates
Solution Approach 1:
The invention creates a composite polymer system combining polyalkylene glycol segments with aromatic carboxylic acid segments. This composite structure delivers the required soil release performance through the polyalkylene glycol portion while the aromatic carboxylic acid portion provides biodegradability, thereby achieving environmental sustainability.
Solution Approach 2:
The patent applies local quality by assigning different functional roles to different segments of the polymer chain. The polyalkylene glycol units provide soil release functionality locally, while the aromatic carboxylic acid units provide biodegradability locally, allowing the overall molecule to satisfy both performance and sustainability requirements simultaneously.
Data Source
AI summary
Fabric and home care compositions including specific anionic polyesters are described, especially suitable are laundry detergent compositions. In such applications, the polyesters e. g. exhibit advantageous whiteness maintenance and soil release performance and have advantageous biodegradability.