The difference between aluminum silica gel and water-resistant aluminum silica gel

Ordinary silica-alumina glue and water-resistant silica-alumina glue have significant differences in many aspects, which are mainly reflected in their chemical structure, performance characteristics and application fields.

Chemical structure

Ordinary silica-alumina glue: It is usually a silica gel containing alumina, and the content of alumina is generally between 2% and 18%. Its chemical structure may be relatively simple, mainly composed of a mixture of silica gel and alumina.

Water-resistant silica-alumina glue: The main component is a colloid with a skeleton structure based on aluminosilicate (such as Al2O3·2SiO2·2H2O). This structure gives water-resistant silica-alumina glue unique water resistance and high temperature resistance.

Performance characteristics

Water resistance:

Ordinary silica-alumina glue: Although it has a certain degree of water resistance, its performance may be affected after long-term exposure to moisture or water.

Water-resistant silica-alumina glue: It can also play its bonding role in moisture or water, and will not lose viscosity due to moisture or water immersion, and has excellent water resistance.

High temperature resistance:

Ordinary silica-alumina glue: The high temperature resistance is relatively general, and it may not be able to remain stable for a long time under high temperature environment.

Water-resistant silica-alumina glue: It has strong stability under high temperature conditions, will not thermally decompose, and has excellent high temperature resistance.

Adsorption:

Ordinary silica-alumina glue: It has a certain adsorption capacity, but it may not be as good as the performance of water-resistant silica-alumina glue under certain specific conditions.

Water-resistant silica-alumina glue: Under high humidity conditions, its adsorption amount may be higher and it can maintain stable adsorption performance.

Other properties:

Water-resistant silica-alumina glue also has good weather resistance, and its adhesion performance will not be damaged by natural factors such as oxidation and ultraviolet radiation.

Application field

Ordinary silica-alumina glue: Due to its performance characteristics, it is usually used in some occasions that do not require high water resistance and high temperature resistance, such as certain catalyst carriers, adsorbents, etc.

Water-resistant silica-alumina glue: Due to its excellent water resistance, high temperature resistance and weather resistance, it is widely used in water-resistant sealing, weather protection, high temperature bonding and other fields. For example, water-resistant silica-alumina glue plays an important role in the automotive manufacturing, petrochemical, electronic and electrical industries.

In summary, there are significant differences between ordinary silica-alumina glue and water-resistant silica-alumina glue in chemical structure, performance characteristics and application fields. When choosing to use, comprehensive consideration should be given to specific needs and conditions.