Description

Methacryloxypentamethyldisiloxane is a specialized organosilicon monomer featuring a reactive methacrylate group and a disiloxane backbone. This unique bifunctional structure is critical for imparting enhanced adhesion, flexibility, and durability to advanced polymer systems. It is an essential raw material for manufacturers in the silicone resins, pressure-sensitive adhesives, and high-performance coatings industries seeking to modify surface properties and crosslink density.

Application

• Silicone Resin Modification: Used as a crosslinking agent to improve the toughness, weather resistance, and adhesion properties of silicone resins for protective coatings and encapsulants.
• UV-Curable Systems: A key monomer in formulations for UV-curable inks, coatings, and adhesives, contributing to rapid curing and excellent film properties.
• Pressure-Sensitive Adhesives (PSAs): Incorporated to enhance the tack, peel strength, and high-temperature performance of silicone-based PSAs for tapes and labels.
• Release Coatings: Serves as a functional component in silicone release liners for the packaging and label industries.
• Fiber Optic Coatings: Employed in coatings for optical fibers to provide mechanical protection and environmental resistance.
• Dental & Medical Materials: Used in the synthesis of siloxane-based polymers for biocompatible applications, including dental impression materials and soft liners.
• Hybrid Organic-Inorganic Polymers: Acts as a coupling agent to create hybrid materials (ORMOSILs) with tailored mechanical and optical properties for advanced optics and electronics.

Basic Information

Product Name	Methacryloxypentamethyldisiloxane
CAS No.	4880-04-0
Molecular Formula	C12H26O3Si2
Molecular Weight	274.51 g/mol
Synonyms	1,1,1,3,3-Pentamethyl-3-(methacryloxy)disiloxane; 3-Methacryloxypropylpentamethyldisiloxane; Methacryloxypropyldimethylsiloxane-dimethylsiloxane copolymer; Methacryloxypropylpentamethyldisiloxane; γ-Methacryloxypropylpentamethyldisiloxane; MEMO; MPDMS; Silane, methacryloxypentamethyldisiloxane
EINECS	225-473-8

Quality Control

Our Methacryloxypentamethyldisiloxane is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including GC and NMR, to ensure high purity and consistent performance. Certificates of Analysis (COA) detailing purity, identity, and key physical properties are provided with every shipment to support your quality assurance protocols.

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). Keep away from heat, sparks, and open flame. Due to the presence of a polymerizable methacrylate group, it is recommended to store under an inert atmosphere (e.g., nitrogen) for long-term stability and to inhibit premature polymerization.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Purity (GC)	≥ 97.0%
Refractive Index (n20D)	1.410 - 1.420
Density (g/mL, 25°C)	0.910 - 0.930

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