Description

Aminopropylmethylsiloxane, Dimethylsiloxane Copolymer is a functional organosilicon polymer that combines the hydrophobic, flexible properties of dimethylsiloxane with the reactive amino functionality of aminopropyl groups. This unique structure makes it an essential coupling agent, surface modifier, and adhesion promoter in advanced material formulations. It is primarily utilized by manufacturers in the coatings, adhesives, sealants, and elastomers (CASE) industries, as well as in personal care and textile treatment applications.

Application

• Adhesion Promoter: Enhances the bonding between organic polymers and inorganic substrates like glass, metals, and minerals in coatings, adhesives, and sealants.
• Surface Modification: Used to treat fillers (e.g., silica, carbon black) to improve dispersion and compatibility within silicone and organic polymer matrices.
• Textile Finishing Agent: Imparts durable softness, hydrophobicity, and improved handle to fabrics and fibers.
• Personal Care Ingredient: Functions as a conditioning agent and emulsifier in hair care and skincare products, providing smoothness and manageability.
• Resin Modifier: Incorporated into epoxy, phenolic, and other thermoset resins to increase flexibility, impact resistance, and adhesion.
• Release Agent Intermediate: Serves as a key component in the synthesis of cured silicone release coatings for labels and tapes.
• Rubber & Elastomer Additive: Improves processing and physical properties in silicone rubber and other specialty elastomer compounds.

Basic Information

Product Name	Aminopropylmethylsiloxane, Dimethylsiloxane Copolymer
CAS No.	99363-37-8
Molecular Formula	(C3H9NOSi)x(C2H6OSi)y
Molecular Weight	Variable (Polymer)
Synonyms	Aminopropylmethyl Polysiloxane; Poly[(dimethylsiloxane)-co-(methyl(3-aminopropyl)siloxane)]; Amino-Functional Silicone Fluid; Amino Silicone Oil; 3-Aminopropylmethylsiloxane-Dimethylsiloxane Copolymer; Aminoalkylmethylsiloxane-Dimethylsiloxane Copolymer; APMS-DMS Copolymer; Amino Modified Silicone
EINECS	Contact for details

Quality Control

Our Aminopropylmethylsiloxane, Dimethylsiloxane Copolymer is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure consistent performance, including measurement of amine value, viscosity, and refractive index. Certificates of Analysis (COA) documenting these specifications are available upon request to support your quality assurance protocols.

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); ensure containers are sealed immediately after use to prevent absorption of atmospheric moisture which can affect product performance.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow viscous liquid
Identification (IR)	Conforms
Amine Value (meq/g)	0.2 - 1.2 (Grade Dependent)
Viscosity @ 25°C (cSt)	100 - 5000 (Grade Dependent)
Refractive Index @ 25°C	1.400 - 1.420
Specific Gravity @ 25°C	0.95 - 1.02
Water Content (KF)	≤ 0.5%

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