Description

Dimethoxysilylmethylpropyl Modified Polyethylenimine is a specialized organosilicon-modified polymer that combines the reactive silyl functionality of silanes with the cationic, branched structure of polyethylenimine. This unique hybrid structure is engineered to provide superior adhesion promotion and surface modification capabilities, particularly on challenging substrates. It is a critical performance additive for formulators in the coatings, adhesives, and composites industries seeking to enhance durability and interfacial bonding. The compound is also identified by the CAS registry number 125441-88-5.

Application

• Adhesion Promoter for Coatings: Significantly improves the adhesion of paints, primers, and industrial coatings to glass, metals, and mineral surfaces.
• Surface Modifier for Fillers and Pigments: Used to treat silica, glass fibers, and other inorganic fillers to improve dispersion and compatibility in polymer matrices.
• Coupling Agent in Sealants and Adhesives: Enhances bond strength and moisture resistance in silicone-modified polymer (MS Polymer) and polyurethane-based formulations.
• Reinforcement Additive for Composites: Acts as a coupling agent in fiber-reinforced plastics (FRP) to strengthen the interface between the resin and reinforcing fibers.
• Primer Component: Formulated into specialty primers for automotive, aerospace, and construction applications to prepare surfaces for subsequent bonding or coating.
• Corrosion Inhibiting Additive: Can be incorporated into protective coatings to improve their barrier properties and adhesion under corrosive conditions.

Basic Information

Product Name	Dimethoxysilylmethylpropyl Modified Polyethylenimine
CAS No.	125441-88-5
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Polyethylenimine, (3-(dimethoxymethylsilyl)propyl)-modified; N-[3-(Dimethoxymethylsilyl)propyl]polyethylenimine; Silylated Polyethylenimine; PEI-silane adduct; Amino-functional silane-modified polymer; Organosilane-modified polyethylenimine; Adhesion promoter 125441-88-5
EINECS	Contact for details

Quality Control

Our Dimethoxysilylmethylpropyl Modified Polyethylenimine is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure consistent performance, including assessment of active content, viscosity, and functional group concentration. A comprehensive Certificate of Analysis (COA) documenting these parameters is provided with every shipment to guarantee compliance with your technical 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 when not in use to prevent moisture absorption, which can affect product performance.

Specification

Item	Specification
Appearance	Clear to slightly hazy viscous liquid
Color	Colorless to pale yellow
Active Content	≥ 95%
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.