Self-crosslinkable polysiloxane-modified polyhydroxy polyurethane resin, process for producing said resin, resin material comprising said resin, and artificial leather produced utilizing said resin
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Solution Overview
Problem
Polyhydroxy polyurethane resins, which utilize carbon dioxide as a production raw material, are inferior in performance compared to traditional polyurethane-based resins, limiting their industrial applications and environmental sustainability, particularly in imitation leather products where high heat resistance, chemical resistance, and abrasion resistance are required.
Innovation Solution
A self-crosslinking, polysiloxane-modified polyhydroxy polyurethane resin is developed, characterized by masked isocyanate groups derived from a reaction of a 5-membered cyclic carbonate compound and an amine-modified polysiloxane compound, which undergoes self-crosslinking upon heat treatment, enhancing heat resistance, chemical resistance, and abrasion resistance, and incorporates carbon dioxide as a sustainable resource.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If polyhydroxy polyurethane resins using carbon dioxide as raw material are employed, then environmental sustainability is improved, but performance (heat resistance, chemical resistance, abrasion resistance) deteriorates
Solution Approach 1:
The patent applies composite materials by combining polyhydroxy polyurethane resin with polysiloxane segments to create a self-crosslinking composite resin system. This composite structure integrates the environmental benefits of CO2-based resins with the enhanced performance characteristics of polysiloxane, achieving both sustainability and reliability requirements
Solution Approach 2:
The patent employs parameter changes by introducing masked isocyanate groups that undergo self-crosslinking upon heating. This thermal parameter change transforms the resin from a linear structure to a crosslinked network, significantly improving heat resistance, chemical resistance, and abrasion resistance while maintaining the CO2-based sustainable foundation
2Reliability
If traditional polyurethane-based resins are used, then performance (heat resistance, chemical resistance, abrasion resistance) is improved, but environmental sustainability deteriorates
Solution Approach 1:
The patent converts the typically harmful excess isocyanate groups into beneficial masked isocyanate functionalities that enable self-crosslinking. This transformation allows the resin to achieve traditional polyurethane performance levels while using sustainable CO2-based polyhydroxy polyurethane as the foundation, effectively converting potential harm into performance benefit
3Reliability
If self-crosslinking mechanism is introduced, then heat resistance and chemical resistance are improved, but device complexity increases
Solution Approach 1:
The patent implements self-service by designing the resin to contain both masked isocyanate groups and hydroxyl groups within the same molecular structure. Upon heating, the masked isocyanate groups automatically react with hydroxyl groups to form crosslinks without requiring external catalysts or additional processing steps, simplifying the overall manufacturing process despite the enhanced functionality
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 self-crosslinking polysiloxane-modified polyhydroxy polyurethane resin effectively addresses the performance gaps of traditional polyurethane resins, providing superior heat resistance, chemical resistance, and abrasion resistance while reducing carbon dioxide emissions, making it suitable for industrial applications and environmental conservation.
Implementation Method 1
when subjected to heat treatment, are demasked to form isocyanate groups, which are reactable with hydroxyl groups in the structure of the self-crosslinking, polysiloxane-modified, polyhydroxy polyurethane resin to induce self-crosslinking
Data Source
AI summary
A problem is to provide, in the field of polyhydroxy polyurethane resins the development of applications of which has not moved ahead by conventional technologies, a self-crosslinking polyhydroxy polyurethane resin, which enables to provide products, such as imitation leathers, excellent in abrasion resistance, chemical resistance, heat resistance and the like, and moreover, which is useful from the viewpoint of a reduction in greenhouse gas, contains carbon dioxide incorporated and fixed therein, and is responsive to environmental conservation. Provided are a self-crosslinking, polysiloxane-modified, polyhydroxy polyurethane resin having masked isocyanate groups in a structure of a polysiloxane-modified, polyhydroxy polyurethane resin derived from a reaction of a 5-membered cyclic carbonate compound and an amine-modified polysiloxane compound and having polysiloxane segments therein; a production process of the self-crosslinking resin; a resin material containing the self-crosslinking resin; and an imitation leather composed of a base fabric and a resin composition composed of the self-crosslinking resin as its principal component and impregnated in or laminated on the base fabric.