Polyrotaxane Urethane Resin Polishing Pad Abrasion Resistance

The patent uses a composite molecular structure formed by cyclic molecules clathrating an axial molecule (polyrotaxane structure) to create a novel urethane resin with enhanced abrasion resistance. This composite structure at the molecular level provides superior mechanical properties while maintaining manufacturability through standard polymerization processes.

The patent changes the fundamental molecular structure parameter by introducing polyrotaxane with side chains having active hydrogen groups, which then react with isocyanate groups to form crosslinked structures. This parameter change in molecular architecture transforms the resin properties to achieve high abrasion resistance.

The novel urethane resin employs a composite molecular structure where cyclic molecules (such as cyclodextrin) clathrate an axial molecule to form polyrotaxane, which then incorporates side chains with active hydrogen. This composite structure at the molecular level provides enhanced polishing efficiency and stability while the overall manufacturing process remains relatively simple.

The patent introduces side chains with active hydrogen groups at specific locations on the cyclic molecules within the polyrotaxane structure. This local modification creates crosslinking points that enhance the overall resin performance for polishing applications without requiring complete structural redesign.

The patent merges the polyrotaxane structure with the urethane resin system through chemical reaction rather than simple mixing. The side chains with active hydrogen on the polyrotaxane cyclic molecules react with isocyanate groups to form covalent crosslinks, creating a unified molecular network that provides superior abrasion resistance compared to physical mixing.

The patent changes the interaction parameter between polyrotaxane and urethane resin from physical mixing to chemical crosslinking. By introducing active hydrogen-containing side chains on the polyrotaxane, the system transitions from a simple mixture to a chemically bonded composite with enhanced mechanical and abrasion resistance properties.

The patent changes the functional group parameter of the polyol component by using polyrotaxane with side chains containing active hydrogen (such as hydroxyl groups) instead of conventional diol compounds. This parameter change enables the formation of crosslinked structures through reaction with isocyanate groups, transforming the linear urethane resin into a crosslinked network with superior abrasion resistance.

The patent creates a composite molecular system where polyrotaxane (composed of cyclic and axial molecules) serves as the polyol component. This composite structure with side chains provides both the flexibility of conventional polyols and the ability to form crosslinked networks, achieving enhanced mechanical properties without excessive structural complexity.