Impact on "Curing Characteristics": Determines whether the silicone can cure properly
The core function of the platinum catalyst is to induce the hydrosilylation reaction between the "vinyl - containing polysiloxane" and the "hydrogen - containing polysiloxane" in the silicone, forming a three - dimensional cross - linked network. The addition ratio is the "switch" and "speed regulator" of this reaction, and the impact is the most direct:
| Addition Ratio Situation | Impact on Curing Speed | Impact on Curing Completeness |
|---|---|---|
| Insufficient Ratio | The reaction rate slows down significantly, or even stagnates | The cross - linking reaction is incomplete, and the molecular chains cannot... |
| Appropriate Ratio | The reaction rate matches the design requirements (e.g., curing at room temperature for 2 - 4 hours / at high temperature for 30 minutes) | The cross - linking reaction is sufficient, and both the inside and outside of the silicone... |
| Excessive Ratio | The reaction rate is too fast, entering a "violent polymerization" state | Although the cross - linking reaction can be completed, the reaction... |