Description

n-Propyltriacetoxysilane is a versatile organosilicon compound widely used as a coupling agent and surface modifier. Its primary value lies in its ability to form strong, durable bonds between inorganic materials and organic polymers, enhancing composite performance. This product is essential for manufacturers in the adhesives, sealants, coatings, and advanced materials industries seeking to improve adhesion, moisture resistance, and mechanical properties.

Application

• Adhesive & Sealant Formulation: Acts as a crosslinking agent and adhesion promoter, particularly for silicone-based systems, improving bond strength to various substrates.
• Surface Treatment for Fillers: Used to modify the surface of mineral fillers (e.g., silica, clay) to enhance compatibility and dispersion in polymer matrices.
• Fiberglass & Composite Manufacturing: Serves as a key sizing agent or coupling agent for glass fibers, improving the interfacial adhesion between the fiber and the resin.
• Waterproofing & Masonry Protection: Imparts hydrophobic properties to concrete, stone, and other construction materials, protecting against moisture damage.
• Crosslinking Agent for Polymers: Utilized in the production and curing of silicone rubbers and other polymers that require moisture-cure mechanisms.
• Primers & Coatings: Incorporated into primer formulations to enhance adhesion of subsequent coatings to difficult substrates like metals or plastics.

Basic Information

Product Name	n-Propyltriacetoxysilane
CAS No.	17865-07-5
Molecular Formula	C9H18O6Si
Molecular Weight	250.32 g/mol
Synonyms	Propyltriacetoxysilane; Triacetoxy(propyl)silane; Propylsilanetriol triacetate; n-Propylsilanetriyl triacetate; Acetic acid (triacetoxypropylsilyl) ester; Silane, triacetoxypropyl-; 3-(Triacetoxysilyl)propane; Propyltriacetoxysilane coupling agent
EINECS	241-819-5

Quality Control

Our n-Propyltriacetoxysilane is manufactured under strict quality management systems to ensure batch-to-batch consistency and high purity. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing key parameters such as assay, identity, and impurity profiles. Our quality commitment aligns with industry best practices for specialty silanes, ensuring reliable performance in your formulations.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive) and reacts with moisture to release acetic acid; containers must be kept tightly sealed under a dry atmosphere (e.g., nitrogen) to prevent degradation. Keep away from strong acids and incompatible organic solvents.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Density (at 20°C)	1.10 - 1.15 g/cm³
Refractive Index (n20D)	1.405 - 1.415
Acetic Acid Content	≤ 1.0%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.