Amino-Mercapto Organopolysiloxane for Soft Oleophobic Textiles
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Solution Overview
Problem
Existing textile treatments using fluorocarbon polymers often impart a harsh feel to fabrics while providing oleophobicity and oil repellency, lacking an improvement in fabric hand compared to untreated fabrics.
Innovation Solution
Development of amino-mercapto functional organopolysiloxanes, created through a condensation reaction involving silanol-functional polysiloxanes, amino functional alkoxy silanes, and mercapto functional alkoxy silanes, which are used to prepare fluorosilicone compounds that impart oil repellency to textiles with an improved hand.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fluorocarbon polymers are used for textile treatment, then oleophobicity and oil repellency are improved, but fabric hand becomes harsh
Solution Approach 1:
The patent combines amino-functional and mercapto-functional groups within the same polysiloxane molecule to create a dual-functional treatment agent. This merging allows the single compound to provide both oleophobicity (through the mercapto group's affinity for oil molecules) and improved fabric hand (through the amino group's lubricating effect), thereby resolving the contradiction between oil repellency and fabric softness
Solution Approach 2:
The invention creates a composite functional structure by incorporating both amino and mercapto functional groups into a single polysiloxane molecule. This composite approach allows the material to exhibit both the oil-repelling properties of mercapto groups and the softening effects of amino groups, simultaneously achieving oleophobicity and improved fabric hand without the harsh feel associated with conventional fluorocarbon treatments
2Reliability
If conventional fluorocarbon treatments are applied, then oil repellency is achieved, but fabric softness is not improved
Solution Approach 1:
The amino-mercapto functional polysiloxane serves multiple functions simultaneously: the mercapto group provides oil repellency through its chemical affinity for oil molecules, while the amino group provides fabric softness through its lubricating properties. This multi-functionality allows a single treatment agent to address both oil repellency and fabric softness, eliminating the need for separate treatments and resolving the contradiction between achieving oil repellency and maintaining fabric softness
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 amino-mercapto functional organopolysiloxanes effectively render textiles oleophobic while enhancing the hand or feel, offering a superior alternative to traditional fluorocarbon treatments by providing both oil repellency and improved fabric softness.
Implementation Method 1
reacting (A) a silanol-functional polysiloxane, (B) an amino functional alkoxy silane, and (C) a mercapto functional alkoxy silane, via a condensation reaction
Data Source
AI summary
An organopolysiloxane containing both an amino functional organic group and a mercapto functional organic group is disclosed. A method of making such amino-mercapto functional organopolysiloxanes is by reacting (A) a silanol-functional polysiloxane, (B) an amino functional alkoxy silane, and (C) a mercapto functional alkoxy silane, via a condensation reaction. The amino-mercapto functional organopolysiloxanes products are useful in textile and fabric treatments.