Aminopropylmethyldiethoxysilane

Catalog NumberHG3179768

CAS Number3179-76-8

CategorySilane Coupling Agent

Molecular Weight

191.34

Molecular Formula

C8H21NO2Si

Boiling Point

85-88 °C

Flash Point

68 °C

Purity

≥95%

Density

0.905-0.925 g/cm3

Application

Used as primers and adhesion promoters.

Shelf Life

When stored at or below 25 °C (77 °F) in the original unopened containers, this product has a shelf life a minimum of two (2) years.

Functional Group

Amino

Refractive Index

1.420-1.430

Viscosity

1.50-1.90 (25°C, cSt)

Download COA Download MSDS

Case Study

Aminopropylmethyldiethoxysilane for Consolidation of Polyurethane Ester Foam

Pellizzi, Eleonora, et al. Polymer degradation and stability 97.11 (2012): 2340-2346.

Museum and archival objects made from polyurethane ester foam often lose mechanical integrity over time. AMDES (Aminopropylmethyldiethoxysilane) was evaluated as a consolidation agent because related aminoalkylalkoxysilanes have shown beneficial effects in paper deacidification and reinforcement. The study examined AMDES at multiple loadings to understand differences in behavior and consolidation potential.
Product Application: AMDES was applied in solutions at varying concentrations (2.5%, 5%, and 10% by volume) using hexamethyldisiloxane (HMDS) as the solvent. The solvent was selected for its low surface tension and ability to wet foam surfaces effectively without causing structural distortion upon evaporation. Modern industrial flexible polyurethane ester foam samples were fully immersed in the solutions for 24 hours, then vacuum-dried at ambient temperature.
Key Performance: Mechanical testing via Compression Force Deflection Test demonstrated that AMDES treatment improved the foam's resistance to compression. This reinforcement effect is attributed to the formation of an interpenetrating polymer network between the polyurethane matrix and polymerized AMDES. Analytical techniques, including FTIR and SEM, indicated that AMDES distributed within the foam structure, polymerizing on cell walls and partially diffusing into the foam branches without filling the open-cell voids. MAS NMR confirmed the polymerization of AMDES and provided insight into its average polymer chain length.

Aminopropylmethyldiethoxysilane for Enhanced Biocompatibility of Natural Rubber Latex Films

Abdullah, Nurulhuda, et al. Journal of Rubber Research 26.2 (2023): 125-137.

Manufacturers of dipped NRL products (medical-grade films, gloves, membranes) need formulations that are both mechanically robust and biocompatible. Conventional compounding often relies on accelerators such as zinc diethyldithiocarbamate (ZDEC), which can leave residual accelerator and contribute to cytotoxicity. The challenge was to develop an HA-NRL formulation that reduces ZDEC residue and cytotoxic response, without sacrificing physical strength.
Formulation Strategy: Aminopropylmethyldiethoxysilane (APMDS) was incorporated into HA-NRL formulations containing calcium carbonate (CaCO3) filler and a reduced level of ZDEC accelerator. The strategy relied on the multifunctional role of APMDS to modify filler and rubber surfaces, promoting stronger filler-rubber interactions and potentially mitigating residual accelerator-related toxicity.
Key Results:
· The application of APMDS yielded significant improvements across key performance parameters. The NRL-dipped films exhibited a lower toxicity effect, indicating enhanced biocompatibility directly linked to the presence of APMDS. High-Performance Liquid Chromatography (HPLC) analysis confirmed that all produced films contained very low levels of residual ZDEC, measuring less than 6 μg/g.
· Enhanced Physical Strength: A notable increase in the physical strength of the dipped films was observed when APMDS was used in conjunction with CaCO3 filler. This enhancement is attributed to improved interfacial interactions, where APMDS promotes stronger physical bonding between the surface-modified filler particles and the surface-modified rubber particles.

• Molecular Weight: 191.34
• Molecular Formula: C8H21NO2Si
• Boiling Point: 85-88 °C
• Flash Point: 68 °C
• Purity: ≥95%
• Density: 0.905-0.925 g/cm3
• Application: Used as primers and adhesion promoters.
• Shelf Life: When stored at or below 25 °C (77 °F) in the original unopened containers, this product has a shelf life a minimum of two (2) years.
• Functional Group: Amino
• Refractive Index: 1.420-1.430
• Viscosity: 1.50-1.90 (25°C, cSt)