Description

Trimethoxysilylpropyl Modified Polyethylenimine is a specialty organosilane-modified polymer that combines the reactive functionality of alkoxysilane groups with the cationic, branched structure of polyethylenimine. This unique hybrid structure is engineered to act as a powerful coupling agent and adhesion promoter, creating durable bonds between organic polymers and inorganic substrates. It is essential for formulators and manufacturers in the coatings, adhesives, and composites industries seeking to enhance product performance, durability, and interfacial strength.

Application

• Adhesion Promoter in Coatings: Significantly improves the adhesion of paints, primers, and industrial coatings to difficult substrates like metals, glass, and plastics.
• Surface Modifier for Fillers & Pigments: Used to treat silica, glass fibers, and other mineral fillers to improve dispersion in polymer matrices and enhance composite mechanical properties.
• Crosslinking Agent: Functions as a moisture-curable crosslinker in silicone-modified polymers, sealants, and elastomers, improving their thermal and chemical resistance.
• Corrosion Inhibiting Additive: Incorporated into protective coatings for metals, where it forms a stable, adherent layer that acts as a barrier against moisture and corrosive agents.
• Fiber Sizing for Composites: Applied as a sizing or coupling agent on glass or carbon fibers to dramatically improve the interfacial bond with epoxy, polyester, or other resin systems.
• Paper & Textile Treatment: Imparts water repellency, strength, and dye affinity to paper products and textiles through surface modification.

Basic Information

Product Name	Trimethoxysilylpropyl Modified Polyethylenimine
CAS No.	75132-84-2
Molecular Formula	(C2H5N)n(C9H23NO3Si)m
Molecular Weight	Varies (Polymer)
Synonyms	Polyethylenimine, N-[3-(trimethoxysilyl)propyl] deriv.; 3-(Trimethoxysilyl)propyl-modified PEI; Silane-modified polyethylenimine; Amino-functional silane polymer; PEI-silane coupling agent; Adhesion promoter 75132-84-2; N-[3-(Trimethoxysilyl)propyl]polyethylenimine
EINECS	Contact for details

Quality Control

Our Trimethoxysilylpropyl Modified Polyethylenimine is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure consistency in key parameters such as silane content, amine value, viscosity, and solids content. A comprehensive Certificate of Analysis (COA) documenting these specifications is provided with every shipment to guarantee it meets your formulation requirements and quality standards.

Storage

Preserve in a tightly closed container, protected from light. This product is hygroscopic (moisture-sensitive). Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep the container tightly sealed under a dry, inert atmosphere (e.g., nitrogen) to prevent moisture absorption and premature hydrolysis or gelation.

Specification

Item	Specification
Appearance	Clear to slightly hazy viscous liquid
Color	Colorless to pale yellow
Assay (Silane Content)	Contact for details
Amine Value	Contact for details
Solids Content	Contact for details
Viscosity (25°C)	Contact for details
Specific Gravity (25°C)	Contact for details

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