Two-Part Curable Adhesive Mixing Ratio Deviation

The patent changes the chemical composition parameters of the adhesive system by introducing a polyisocyanate compound with specific functional groups (isocyanurate group, cyclic carbodiimide group, or biuret group) and controlling its content within 1-50 parts by mass per 100 parts by mass of polyol. This parameter adjustment allows the system to maintain stable tensile properties across a broader mixing ratio range while preventing excessive foaming, effectively resolving the contradiction between curing rate and tensile properties.

The patent creates a composite adhesive system combining polyisocyanate, polyol, and specifically selected polyisocyanate compounds with complementary functional groups. This composite formulation synergistically balances reactivity and mechanical properties, enabling the adhesive to tolerate mixing ratio deviations without significant loss in tensile strength or excessive foaming, thus resolving the contradiction between curing rate and tensile properties.

The patent modifies the chemical parameters by incorporating polyisocyanate compounds with specific functional groups (isocyanurate, cyclic carbodiimide, or biuret) at controlled concentrations (1-50 parts by mass per 100 parts by mass of polyol). This parameter optimization suppresses foaming reactions while preserving tensile strength, resolving the contradiction between foaming control and strength maintenance.

The patent converts the potentially harmful effect of mixing ratio deviations into a beneficial outcome by using polyisocyanate compounds with specific functional groups that moderate the reaction. These compounds transform the harmful foaming and strength loss into controlled curing with stable mechanical properties, effectively turning the deviation problem into a solution.

The patent changes the chemical composition parameters by adding polyisocyanate compounds with specific functional groups at controlled levels (1-50 parts by mass per 100 parts by mass of polyol). This modification enables the adhesive system to maintain excellent elongation at break across a wider mixing ratio range, increasing flexibility while preserving mechanical properties.

The patent creates a universal adhesive formulation that can tolerate various mixing ratios while maintaining consistent performance. The polyisocyanate compound with specific functional groups serves multiple functions: maintaining elongation at break, suppressing foaming, and enabling mixing ratio flexibility, thus resolving the contradiction between strength and adaptability.