Polyurethaneurea Powder Compositions for Uniform Fine Particles
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Solution Overview
Problem
There is a need for improved methods to produce fine, uniform polymer powders, particularly for elastomeric polymers like segmented polyurethanes and polyurethaneureas, and for fabric care compositions that can be used simultaneously with detergents to extend the benefits of fabric softening and fragrance substantiation.
Innovation Solution
The development of polyurethaneurea compositions in the form of powders or aqueous dispersions, which are reaction products of prepolymers with chain extenders, allowing for film-forming or non-film-forming properties, and their application in fabric care to provide softening, anti-stain, and fragrance retention properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional polymer processing methods are used to produce fine powders, then particle size reduction is achieved, but manufacturing precision and uniformity deteriorate
Solution Approach 1:
The invention changes the physical state parameter of the polymer from solid to liquid during processing. By dissolving the polymer in a solvent to create a viscous solution, then rapidly cooling it to freeze the structure, fine uniform particles are produced. This parameter change (temperature and phase) enables precise control over particle size and uniformity that is not achievable with conventional solid-state processing methods.
2Duration of action of moving object
If fabric softeners are used to provide softening and fragrance benefits, then fabric care properties are improved, but duration of action deteriorates over time
Solution Approach 1:
The invention creates a composite material system where polymer particles are embedded within a matrix containing fragrance and softening agents. This composite structure allows the fabric softener to provide both immediate care benefits and sustained fragrance release over time. The polymer matrix acts as a reservoir that slowly releases the active ingredients, extending the duration of action while maintaining relatively simple application procedures.
3Reliability
If fabric softeners are introduced during rinsing to prevent reaction with detergents, then reliability of fabric care properties is improved, but loss of time in laundering process increases
Solution Approach 1:
The invention merges multiple fabric care functions into a single composition that can be applied simultaneously with detergent. The composition includes polymer particles with embedded fragrance and softening agents that are compatible with anionic detergents. This unified approach eliminates the need for separate rinsing applications, reducing total laundry time while maintaining reliable fabric care effectiveness through the synergistic combination of ingredients.
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 polyurethaneurea compositions effectively impart fabric care properties, including softness, static reduction, and fragrance longevity, while allowing for simultaneous use with detergents, enhancing the ease of care and shape retention of fabrics.
Implementation Method 1
a nonionic film-forming dispersion including a polyurethaneurea polymer and water
Data Source
AI summary
Included are nylon and polyurethane urea compositions such as in the form of powders, beads and flock to be included in extruded and molded articles containing a thermoplastic resin such as nylon 12. The addition of the powders, beads or flock improve flexibility and shape retention of such molded articles, for example in eyewear frames.