The alkoxysilyl groups of silane coupling agents become silanol groups when dissolved in water.
This silanol group is unstable and undergoes condensation reactions over time. This results in the formation of siloxane bonds, which eventually lead to gelation.
In general, silanol groups are unstable in aqueous solution, but are relatively stable in a weakly acidic region.
Also, aminosilanes are very stable in aqueous solutions due to their interaction with amino groups. To improve the storage stability of the solution, the pH of the solution can be adjusted, alcohol can be used in combination with the solution, and the solution can be stored below room temperature.

The filler surface is stable after dehydration and condensation. When added to resins or grafted, it is import […]

Storage of the hydrolyzed solution depends on the type and number of alkoxy groups of the silane coupling agen […]

Store in a cool, dark place (out of direct sunlight, at room temperature or below, with no condensation), away […]

A simple way to evaluate hydrophobized fillers is to use the index of hydrophobicity (methanol wettability). C […]

The recommended conditions for water volatilization and dehydration condensation are 80-120℃. Changes in Perfo […]

After cleaning the inorganic surface and removing oil and grease, primer treatment is expected to be highly ef […]

In general, in the pretreatment method, the inorganic filler is treated first and then kneaded into the organi […]

The optimal amount is determined by the specific surface area of the filler and the minimum coverage area of t […]

The following is a guideline for silane types and applicable resins. Organic Functional Groups and Compatible […]