Description

Methacryloxypropyl Terminated Polydimethylsiloxane is a reactive silicone macromer featuring a polydimethylsiloxane (PDMS) backbone terminated with methacrylate functional groups. This unique hybrid structure is critical for imparting the low surface energy, flexibility, and thermal stability of silicones into cross-linked polymer networks. It is an essential intermediate for formulators and polymer chemists seeking to create advanced materials with enhanced surface properties, release characteristics, and biocompatibility. Key industries that utilize this product include advanced coatings, pressure-sensitive adhesives, release liners, and biomedical devices.

Application

• UV-Curable Coatings & Inks: Acts as a reactive diluent and modifier to improve slip, mar resistance, and surface smoothness in clear coats, overprint varnishes, and 3D printing resins.
• Pressure-Sensitive Adhesives (PSAs): Incorporated to modify adhesion properties, enhance tack, and provide controlled release or permanent slip characteristics.
• Silicone Release Liners: Serves as a key component in radiation-curable release coatings for labels and tapes, offering precise and stable release force.
• Biomedical & Healthcare Materials: Used in the synthesis of silicone hydrogels for contact lenses, breathable wound dressings, and other biocompatible polymer matrices.
• Modifier for Acrylic & Methacrylic Resins: Imparts internal lubrication, weatherability, and impact resistance to acrylic sheets, molding compounds, and dental materials.
• Fiber & Textile Treatments: Provides durable softness, water repellency, and anti-stick properties when grafted onto synthetic fibers.

Basic Information

Product Name	Methacryloxypropyl Terminated Polydimethylsiloxane
CAS No.	146632-07-7
Molecular Formula	CnH2n+2O3Sin+2 (n varies by chain length)
Molecular Weight	Varies by degree of polymerization. Contact for details.
Synonyms	Methacryloxypropyl-Terminated PDMS; Methacryloxypropyl Polydimethylsiloxane; γ-Methacryloxypropyl Terminated Polydimethylsiloxane; Methacrylated PDMS; PDMS-DMA; Silicone Macromer; Reactive Silicone Oligomer; Monomethacryloxypropyl Terminated Polydimethylsiloxane
EINECS	Contact for details.

Quality Control

Our Methacryloxypropyl Terminated Polydimethylsiloxane is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure consistency in functionality, purity, and viscosity. Key parameters monitored include methacrylate content, degree of polymerization, and volatile matter. A Certificate of Analysis (COA) documenting these 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 temperatures between 15°C and 25°C (59°F and 77°F). To prevent premature polymerization, avoid contamination and prolonged exposure to heat or direct light sources. Under these conditions, the product is typically stable for 12 months from the date of manufacture.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow viscous liquid
Identification (IR)	Conforms to structure
Viscosity (25°C)	Specified grade dependent (cSt)
Methacrylate Content	Specified grade dependent (% wt.)
Molecular Weight (GPC)	Specified grade dependent (Mn)
Volatile Matter	< 1.0%
Refractive Index (n20D)	~1.405 - 1.415

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