Anionic Polyester Laundry Composition for Whiteness and Biodegradability
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Solution Overview
Problem
Anionic soil release polyesters used in laundry detergent compositions have poor biodegradability, limiting their application in green and sustainable fabric and home care formulations.
Innovation Solution
Polyesters comprising specific structural units and terminal groups, including terephthalic acid derivatives, 5-sulfoisophthalic acid, alkylene glycols, and polyalkyleneglycol, with varying molar ratios and terminal groups, enhancing biodegradability and washing performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If anionic soil release polyesters are used in laundry detergent compositions, then washing performance and whiteness maintenance are improved, but biodegradability deteriorates
Solution Approach 1:
The patent modifies the chemical structure of polyester molecules by changing parameters such as incorporating specific structural units (formulae I-V) with defined molar ratios, using different cations (Na+, K+, NH4+, etc.), and adjusting terminal group compositions to achieve both good washing performance and improved biodegradability
Solution Approach 2:
The invention creates composite polyester structures combining multiple structural units (aromatic units from formulae I and II, aliphatic units from formula III, terminal groups from formula IV, and polyalkyleneglycol units from formula V) to achieve a material that simultaneously provides soil release performance and enhanced biodegradability
Data Source
AI summary
Fabric and home care compositions including specific anionic polyesters. The compositions are particularly suitable as laundry detergent compositions. In such applications, the polyesters e. g. exhibit advantageous whiteness maintenance and have advantageous biodegradability.