Cyclic Urethane Curable Composition for Abrasion-Resistant Polishing Pads

The patent segments the polyrotaxane structure into two separate components: cyclic molecules (such as cyclodextrin derivatives) and axial molecules (polyols). These components can be handled separately as low-viscosity liquids or powders, improving ease of use. During curing, they self-assemble into the desired polyrotaxane-like structure, achieving both good handleability and superior polishing characteristics.

The patent introduces host-guest inclusion complexes as an intermediary mechanism. Cyclic molecules form inclusion complexes with axial molecules through host-guest interactions, enabling the assembly of complex polyrotaxane structures from simple, easily handleable components. This intermediary mechanism allows separate handling of components while achieving integrated functionality in the final product.

The patent creates a composite material system combining cyclic molecules (hosts) and axial molecules (guests) to form polyrotaxane-like structures within the polyurethane matrix. This composite approach integrates the mechanical strength and abrasion resistance of polyrotaxane with the manufacturing simplicity of conventional polyurethane resins, achieving both ease of manufacture and superior performance.

The patent changes the molecular parameters of the polyurethane resin by incorporating polyrotaxane-like structures formed from cyclic and axial molecules. This parameter change (introducing threaded molecular structures) significantly improves abrasion resistance and edge-dripping prevention while maintaining compatibility with conventional polyurethane manufacturing processes.