Description

(Methacryloxypropyl)Methylsiloxane, Dimethylsiloxane Copolymer is a reactive silicone copolymer featuring methacrylate functional groups. This unique structure provides a versatile platform for creating hybrid organic-inorganic materials with enhanced properties. It is essential for formulators and manufacturers seeking to improve adhesion, weatherability, and crosslinking efficiency in high-performance coatings, sealants, and composites. Key industries that utilize this advanced material include electronics, optical devices, and specialty adhesives.

Application

• Reactive Modifier for Acrylic Resins: Imparts silicone-like properties such as hydrophobicity, thermal stability, and flexibility to acrylic-based coatings and films.
• Primer and Adhesion Promoter: Enhances the bonding of silicone sealants and adhesives to difficult substrates like metals, glass, and plastics.
• Optical Encapsulant and Lens Material: Used in LED packaging and optical lenses due to its clarity, UV stability, and low moisture absorption.
• Release Coating Formulations: Acts as a crosslinkable component in durable, high-temperature release liners for pressure-sensitive adhesives.
• Fiber Optic Coating: Provides a protective, low-stress coating that protects optical fibers while maintaining signal integrity.
• Hydrophobic Additive for Surface Treatments: Incorporated into formulations to create water-repellent and anti-fouling surfaces on textiles and construction materials.

Basic Information

Product Name	(Methacryloxypropyl)Methylsiloxane, Dimethylsiloxane Copolymer
CAS No.	104780-61-2
Molecular Formula	(C10H18O3Si)n(C2H6OSi)m
Molecular Weight	Variable (Copolymer)
Synonyms	Methacryloxypropyl Methyl Siloxane-Dimethyl Siloxane Copolymer; Methacryloxypropyl-terminated Polydimethylsiloxane; Methacryloxypropyl Modified Silicone Fluid; γ-Methacryloxypropyl Polydimethylsiloxane; Silane, methacryloxypropylmethyl, dimethylsiloxane copolymer; Methacryloxy Functional Silicone; Reactive Silicone Acrylate; KBM-5103 (Trade Name Analog)
EINECS	Contact for details

Quality Control

Our (Methacryloxypropyl)Methylsiloxane, Dimethylsiloxane Copolymer is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure consistent performance, including verification of methacrylate content, viscosity, and refractive index. A comprehensive Certificate of Analysis (COA) detailing purity and key specifications is provided with every shipment to guarantee 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 / 59-77°F). Keep away from heat sources and incompatible materials such as strong oxidizing agents. To prevent premature polymerization, avoid contamination and exposure to free radical initiators.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Viscosity (25°C)	100 - 5000 cSt (Grade Dependent)
Refractive Index (n20D)	1.405 - 1.425
Specific Gravity (25°C)	0.95 - 1.05
Methacrylate Content	As per grade requirement
Purity (GC)	> 95%

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