What is 3-Aminopropyltriethoxysilane CAS 919-30-2 ?

3-Aminopropyltriethoxysilane CAS 919-30-2 is usually a colorless to pale yellow transparent liquid with an ammonia smell. It is soluble in organic solvents such as ethanol and ether, and can also react slowly with water.

Specification

Item	Value
Appearance	white crystalline powder
Melting point	153-159 °C (lit.)
boiling point	310 °C (decomp)
density	1.67 g/cm3 at 20 °C
PH	3.24(1 mM solution);2.62(10 mM solution);2.08(100 mM solution);
Storage conditions	2-8°C

 

Application

3-Aminopropyltriethoxysilane’s core application is as a silane coupling agent, primarily used to connect inorganic and organic materials and enhance their bonding properties.

Its specific applications can be categorized into the following three categories:

1.Material Surface Modification

• It treats inorganic fillers to improve their compatibility and dispersibility with organic matrices such as resins.
• Modifying metal surfaces (enhancing adhesion between metals and coatings or adhesives, while also improving corrosion resistance).
• Modifying glass and ceramic surfaces, imparting oleophilicity and facilitating bonding with organic polymers.

2.Adhesive and Coatings Industry

• As an adhesive additive, it improves bond strength and durability to substrates such as glass and metal, and is particularly suitable for systems such as epoxy resins and polyurethanes.
• Added to coating formulations, it enhances adhesion between the coating and the substrate, reduces coating shedding, and improves water and weather resistance.

3.Polymer Synthesis and Modification

• As a crosslinker or functional monomer, it participates in polymer synthesis, introducing amino groups to improve the mechanical properties, thermal stability, and adhesive properties of polymers.
• It is used to modify materials such as plastics and rubber, enhancing their bonding with inorganic fillers and thereby optimizing physical properties such as tensile strength and impact strength.

Features

1.Chemical properties: Bifunctional driven reactivity, capable of chemically bonding with active groups (such as epoxy groups, carboxyl groups) in organic materials (resins, rubbers, coatings), achieving a bridge between inorganic and organic at the molecular level.

2.Comprehensive performance improvement: It not only resolves the issue of material adhesion but also simultaneously enhances the water resistance, weather resistance, and mechanical strength of composite materials, reducing the risk of interface failure.

3.Flexible application methods: It can be applied in various ways such as directly adding to the resin system, soaking inorganic fillers, and coating the surface of the substrate, without the need for special complex equipment, and is suitable for industrial production.

4.Storage and process stability: Compared with some highly active silanes, the hydrolysis rate of the ethoxy group is gentler, the product has a longer storage period, and it is less likely to form gel due to rapid hydrolysis during the process, with a wider operation window.

5.Wide substrate compatibility: It is applicable to most inorganic substrates such as glass, metal, ceramics, silica, calcium carbonate, as well as mainstream organic polymers like epoxy resin, polyurethane, and phenolic resin, without the need for targeted adjustments.

6.Customization: Products with different molecular bulk densities, mesh sizes and contents can be customized according to customer requirements

Packaging

We usually package: 500g/ bottle, 1kg/ bottle, 5kg/ barrel, 25kg/ barrel.
We can support customized packaging according to your requirements.