Description

n-(Triethoxysilylpropyl)-o-Polyethylene Oxide Urethane, 95% CAS NO 74695-91-3 is a high-purity, hybrid organosilane coupling agent that combines a reactive triethoxysilyl group with a hydrophilic polyether urethane chain. This unique structure is engineered to create a robust covalent bridge between inorganic substrates and organic polymer matrices, significantly enhancing adhesion, durability, and mechanical performance. It is an essential material for formulators and manufacturers in the coatings, adhesives, sealants, and elastomers (CASE) industries, as well as advanced composites and surface modification applications.

Application

• Adhesion Promoter in paints, coatings, and inks for metals, glass, and plastics.
• Surface Modifier for nanoparticles and fillers (e.g., silica, glass beads) to improve dispersion and compatibility in polymer composites.
• Crosslinking Agent in moisture-curable sealants, adhesives, and RTV silicone formulations.
• Primer Component for enhancing the bond strength of structural adhesives on difficult-to-bond substrates.
• Hydrophilic Coating Additive to impart anti-fog, anti-static, or improved wetting properties to surfaces.
• Fiber Sizing for glass or carbon fibers to strengthen the fiber-matrix interface in reinforced plastics.
• Biomaterial Modification for creating non-fouling or protein-resistant surfaces on medical devices.

Basic Information

Product Name	n-(Triethoxysilylpropyl)-o-Polyethylene Oxide Urethane, 95%
CAS No.	74695-91-3
Molecular Formula	CnH2n+1OmSi (Polymeric) - Contact for details
Molecular Weight	Variable (Polymer) - Contact for details
Synonyms	Poly(oxy-1,2-ethanediyl), α-[3-(triethoxysilyl)propyl]-ω-hydroxy, carbamate; Silane, triethoxy[3-[(polyethyleneoxy)urethane]propyl]-; PEG-silane urethane; Polyethylene glycol urethane propyltriethoxysilane; Ureido silane with polyether chain; 3-(Triethoxysilyl)propyl urethane of polyethylene glycol; Hydrophilic urethane silane; Organosilane polyether urethane
EINECS	Contact for details

Quality Control

Our n-(Triethoxysilylpropyl)-o-Polyethylene Oxide Urethane is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing, including assay by titration or NMR, to ensure the specified purity of 95% and consistent performance. Certificates of Analysis (COA) detailing purity, viscosity, and other critical parameters are provided with every shipment to guarantee traceability and compliance with your formulation requirements.

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 product is hygroscopic (moisture-sensitive). Keep the container tightly sealed under a dry inert atmosphere (e.g., nitrogen) to prevent hydrolysis and maintain product integrity.

Specification

Item	Specification
Appearance	Colorless to pale yellow viscous liquid
Identification (IR)	Conforms to structure
Assay (Purity)	≥ 95.0 %
Moisture (KF)	≤ 0.5 %
Viscosity (25°C)	Contact for details
Specific Gravity (25°C)	Contact for details
Refractive Index (n20D)	Contact for details

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