Free-Radically Polymerizable Crosslinker for Structural Adhesives

The patent changes the chemical parameters by using free-radically polymerizable crosslinkers with specific nitrogen atom configurations (secondary and tertiary N atoms in defined ratios) instead of traditional elastomeric materials. This chemical parameter change achieves flexibility and impact resistance through polymer chain structure rather than rubber particle reinforcement, avoiding the viscosity increase associated with elastomer incorporation.

The patent introduces local quality by creating specific molecular environments with secondary and tertiary nitrogen atoms positioned at defined distances from polymerizable groups. This localized chemical structure provides flexibility and adhesion at the molecular level without requiring bulk elastomeric materials, thus maintaining low viscosity while achieving high impact resistance.

The patent applies dynamics by creating a polymer network with mobile secondary and tertiary nitrogen atoms that can dynamically adjust to stress distributions. The free-radically polymerizable groups form crosslinks that maintain structural integrity while the nitrogen-containing segments provide dynamic flexibility, allowing the bond to redistribute stresses uniformly rather than concentrating them at rigid interfaces.

The patent creates a composite molecular structure combining polymerizable groups (for crosslinking and strength) with nitrogen-containing segments (for flexibility and stress distribution). This molecular composite achieves both high adhesion strength and uniform stress distribution, preventing bond failure and distortion while maintaining reliability.

The patent applies self-service by designing a crosslinker that inherently provides adhesion promotion through its molecular structure (secondary and tertiary nitrogen atoms with polymerizable groups). The adhesive composition itself contains the adhesion-promoting functionality, eliminating the need for external surface treatments. The nitrogen-containing segments self-assemble at interfaces to provide strong bonding without requiring substrate modification.

The patent achieves universality by creating a multi-functional crosslinker that simultaneously provides crosslinking (for strength), adhesion promotion (through nitrogen segments), and flexibility (through molecular structure). This single compound performs multiple functions that traditionally required separate surface treatments and adhesive formulations, simplifying the overall manufacturing process while maintaining high adhesion strength.