Description

Aminopropyl Terminated Polydimethylsiloxane is a reactive organosilicon polymer featuring primary amine end groups, making it a versatile functional fluid and intermediate. This unique structure provides excellent coupling properties between organic and inorganic materials, enhancing adhesion, compatibility, and surface modification. It is essential for formulators and manufacturers in the coatings, adhesives, sealants, and elastomers (CASE) industries, as well as in personal care and textile processing, seeking to improve product performance and durability.

Application

• Adhesion Promoter & Coupling Agent: Enhances the bond strength between organic polymers (e.g., epoxies, polyurethanes) and inorganic substrates like glass, metals, and minerals.
• Surface Modification & Treatment: Used to impart hydrophobicity, improve lubricity, or create reactive amine-functional surfaces on fibers, fillers, and pigments.
• Intermediate for Silicone Modification: Serves as a key building block for synthesizing more complex silicone copolymers, such as silicone polyethers or silicone polyureas.
• Coatings & Inks: Improves scratch resistance, flow, leveling, and substrate wetting in high-performance industrial and protective coatings.
• Sealants & Adhesives: Acts as a crosslinker or chain extender in moisture-cure systems, contributing to flexibility and toughness.
• Personal Care Ingredients: Functions as a conditioning agent and emulsifier in hair care and skincare formulations due to its soft feel and compatibility.
• Textile Softeners & Finishes: Provides a durable, soft hand feel to fabrics while improving water repellency.
• Composite Materials: Enhances the dispersion and interfacial bonding of fillers (e.g., silica, clay) within polymer matrices.

Basic Information

Product Name	Aminopropyl Terminated Polydimethylsiloxane
CAS No.	106214-84-0
Molecular Formula	Contact for details
Molecular Weight	Varies by chain length (n)
Synonyms	α,ω-Bis(3-aminopropyl)polydimethylsiloxane; Aminopropyl Dimethicone; 3-Aminopropyl Terminated PDMS; Amino Functional Silicone Fluid; Bis(3-aminopropyl) Polydimethylsiloxane; Amino Silicone Oil; Aminopropyl Siloxane Homopolymer; APDMS
EINECS	Contact for details

Quality Control

Our Aminopropyl Terminated Polydimethylsiloxane is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure consistent amine value, viscosity, purity, and functionality. Certificates of Analysis (COA) detailing key specifications are available upon request to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive) and may react with atmospheric moisture and carbon dioxide over time. Keep away from strong acids and oxidizing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Viscosity (25°C)	Grade dependent (cSt)
Amino Value (meq/g)	Grade dependent
Specific Gravity (25°C)	0.96 - 1.00
Refractive Index (n20D)	1.400 - 1.410
Water Content	< 0.5%

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