Silane coupling agent cannot be stored for a long time after hydrolysis. The main reason is that the substances generated during the hydrolysis process are unstable and prone to further chemical reactions or degradation, thus affecting its performance and effect. The specific reasons are as follows:


1. Hydrolysis reaction: Silane coupling agent contains silane groups, which are prone to hydrolysis in aqueous solution to generate silicic acid or silicate, causing changes in its molecular structure.

2. Poor stability: The molecular structure of the hydrolyzed silane coupling agent is unstable and is easily affected by environmental factors (such as temperature, pH value, light, etc.), further degrading or cross-linking, resulting in a decrease in its performance.

3. Reduced activity: The activity of the hydrolyzed silane coupling agent is reduced, and its reaction ability with inorganic and organic substances is weakened, and it cannot effectively play its due coupling role.

Therefore, in order to ensure the effectiveness and performance of the silane coupling agent, it is recommended to prepare it and use it within one hour.