Abstract
N-Propyltriethoxysilane (CAS No. 2550-02-9), silane coupling agent KH-332, is a monomeric alkylalkoxysilane that, when exposed to moisture, is reactive with the minerals. The monomer can penetrate deeply into a substrate, and then react to form a protective surface surrounding each microscopic particle. This protective surface is extremely durable and leads to significant improvements in weather resistance. The silane is easy to dissolve in organic solvents to form clear, colorless, stable solutions.

Identification
Name    n-Propyltriethoxysilane
Synonyms    Triethoxypropylsilane
Molecular Formula    C9H22O3Si
Molecular Weight    206.36
CAS Registry Number    2550-02-9
EINECS    219-842-7

Equivalents
Dow Corning 1-6535  
ShinEtsu KBE-3033  
EVONIK Degussa Dynasylan PTEO  

Properties
Density    0.89
Boiling point    175 C degree
Flash point    57 C degree
Water solubility    REACTS

Application
N-Propyltriethoxysilane (CAS No. 2550-02-9), silane coupling agent KH-332, is an important additive for many applications. Examples are:
1. High-Performance Penetrating Sealers: Premium-grade penetrating sealers are easily formulated by blending 10 to 40 percent KH-331 in alcohols or organic solvents.
2. Sol-Gel system: N-Propyltrimethoxysilane is an important component in Sol-Gel system.
3. Filler Dispersion: KH-331 can be used as a surface modifier to generate hydrophobicity (e. G. Mineral fillers or inorganic pigments). The medium-chain alkyl functionality in unique compound properties when KH-331 treated minerals or pigments are incorporated into polymers e. G. PP, PE. Loading levels of 0.5 to 1.5 wt% KH-331 based on the weight of minerals or pigments are typically recommended.