Polysiloxane Copolymer Textile Finishing for Wash-Durable Hydrophilicity
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Solution Overview
Problem
Current silicone-based softeners for textiles face challenges in maintaining hydrophilicity and substantivity under harsh laundry conditions, including alkaline detergents and high temperatures, while also requiring flexible formulation and reduced material costs.
Innovation Solution
The use of polyamino and/or polyammonium-polysiloxane-copolymer compounds with specific repeating units, including quaternized imidazole, pyrazole, and piperazine structures, which provide improved hydrophilicity, softness, and substantivity through optimized alkyleneoxide and polydiorganosiloxane ratios, allowing for enhanced fiber treatment with reduced quantities and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If polysiloxane quats are used to increase substantivity, then resistance to being washed out improves, but compatibility with anionic surfactants and resistance to harsh laundry conditions deteriorates
Solution Approach 1:
The invention uses composite polysiloxane structures combining siloxane backbones with quaternary ammonium groups and alkyleneoxide side chains. This composite approach allows simultaneous achievement of substantivity (from quat groups), hydrophilicity (from alkyleneoxide), and compatibility with harsh laundry conditions (from siloxane backbone stability), resolving the contradiction between substantivity and adaptability.
Solution Approach 2:
The patent introduces different functional groups at specific positions: quaternary ammonium groups for substantivity, alkyleneoxide chains for hydrophilicity and surfactant compatibility, and siloxane units for thermal stability. This local functional differentiation allows each component to address specific requirements without compromising overall performance.
2Productivity
If modern laundry detergents with strong alkaline agents and enzymes are used, then cleaning performance improves, but the stability and performance of textile softeners deteriorates under harsh conditions
Solution Approach 1:
The patent modifies the chemical parameters of the polysiloxane structure by incorporating quaternary ammonium groups and alkyleneoxide chains, which change the molecule's resistance properties. These parameter changes enable the softener to withstand high pH, oxidative bleaching agents, and enzymatic action while maintaining its softening function.
Solution Approach 2:
The invention creates a composite molecular structure combining the thermal and chemical stability of siloxane backbones with the surfactant-compatible quaternary ammonium-alkyleneoxide functionality. This composite structure resists degradation under harsh laundry conditions while maintaining cleaning and softening performance.
Data Source
AI summary
The invention relates to the use of polyamino and/or polyammonium-polysiloxane-copolymer compounds or aqueous emulsions thereof for of the first finishing of fibrous materials, aqueous emulsions of the polyamino and/or polyammonium-polysiloxane-copolymer compounds, as well as a method for the first finishing of fibrous materials.