Polyamide Masterbatch for Stain Resistance and Spinning Processability
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Solution Overview
Problem
Existing polyamide compositions face challenges in achieving both excellent stain resistance and processability for high-speed fiber spinning applications, as the addition of stain resistance masterbatches often compromises the fiber spinning processability of polyamide polymers.
Innovation Solution
A masterbatch polyamide polymer is developed, incorporating residues of caprolactam, diamine, and 5-sulfoisophthalic acid or its salt, which can be blended with terminated polyamide polymers to confer stain resistance while maintaining processability, with specific concentrations and reaction conditions optimizing the blend's properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a polyester-based stain resistance masterbatch is added to non-terminated polyamide and highly dual-terminated polyamide, then stain resistance is improved, but fiber spinning processability is reduced
Solution Approach 1:
The patent changes the chemical parameters of the masterbatch by using polyamide-compatible terminators (monofunctional acids or amines) instead of conventional polyester-based additives. This parameter change allows the masterbatch to provide stain resistance through end-group termination while maintaining the polyamide polymer's spinning processability by avoiding incompatible chemical structures
Solution Approach 2:
The patent creates a homogeneous polyamide-based masterbatch system where all components (polyamide polymer, monofunctional acid/amine, and stain resistance agents) are chemically compatible. This homogeneity ensures uniform distribution and interaction throughout the blend, allowing simultaneous achievement of stain resistance and processability without phase separation or incompatibility issues
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 resulting polyamide polymer blends exhibit excellent stain resistance and processability, allowing for high-speed fiber spinning with improved tenacity, elongation, and melt stability, as demonstrated by reduced color difference and increased spinning speeds without significant viscosity changes.
Implementation Method 1
a masterbatch polyamide polymer including a residue of caprolactam, a residue of a diamine, and a residue of at least one of 5-sulfoisophthalic acid and a 5-sulfoisophthalic acid salt
Implementation Method 2
allowing for high-speed fiber spinning with improved tenacity, elongation, and melt stability, as demonstrated by reduced color difference and increased spinning speeds without significant viscosity changes
Data Source
AI summary
The present disclosure provides a masterbatch polyamide polymer capable of conferring stain resistance to a terminated polyamide polymer while substantially maintaining the processability of the terminated polyamide polymer.