Description

1,3 Bis(4-Methacryloxybutyl)Tetramethyldisiloxane is a high-purity, difunctional organosilicon monomer featuring reactive methacrylate groups at the termini of flexible siloxane-linked chains. This compound matters as a critical crosslinking agent and building block for synthesizing advanced silicone-based polymers with tailored properties like flexibility, hydrophobicity, and UV curability. It is essential for manufacturers in the specialty polymers, advanced coatings, and high-performance materials sectors seeking to enhance product durability and functionality.

Application

• Silicone Hydrogel Contact Lenses: A key crosslinker for producing oxygen-permeable, biocompatible, and comfortable hydrogel materials.
• UV-Curable Release Coatings & Inks: Imparts excellent release properties and fast curing rates for pressure-sensitive adhesive liners and graphic arts.
• High-Refractive Index Optical Resins: Serves as a monomer in formulations for LED encapsulants and optical lenses requiring clarity and thermal stability.
• Dental Restorative Composites: Used to modify resin matrices, improving fracture toughness and reducing polymerization shrinkage.
• Silicone Pressure-Sensitive Adhesives (PSAs): Enhances cohesive strength and adhesion performance in medical tapes and industrial labels.
• Fiber Optic Coatings: Provides protective, flexible, and durable layers that safeguard optical fibers.
• 3D Printing Resins (SLA/DLP): A functional additive for formulating tough, flexible, and precise photopolymer resins.
• Modifier for Acrylic Polymers: Incorporated to improve the impact resistance, weatherability, and surface characteristics of acrylic systems.

Basic Information

Product Name	1,3 Bis(4-Methacryloxybutyl)Tetramethyldisiloxane
CAS No.	70877-11-1
Molecular Formula	C₂₄H₄₆O₆Si₂
Molecular Weight	486.80 g/mol
Synonyms	1,3-Bis(4-methacryloxybutyl)-1,1,3,3-tetramethyldisiloxane; Bis(4-methacryloxybutyl)tetramethyldisiloxane; 1,1,3,3-Tetramethyl-1,3-bis(4-(methacryloyloxy)butyl)disiloxane; Methacryloxybutyl-Terminated Siloxane; Silane, 1,1,3,3-tetramethyl-1,3-bis[4-[(2-methyl-1-oxo-2-propen-1-yl)oxy]butyl]disiloxane; MBTS; Contact for details on additional trade names.
EINECS	Contact for details

Quality Control

Our 1,3 Bis(4-Methacryloxybutyl)Tetramethyldisiloxane is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including chromatography and spectroscopy, to ensure high purity and consistency suitable for demanding applications like medical devices and optical materials. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are available upon request to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at temperatures between 15-25°C (59-77°F). Due to its light-sensitive and easily oxidized nature, it is recommended to store this material under an inert atmosphere (e.g., nitrogen or argon) to maintain stability and prevent premature polymerization or degradation. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 97.0%
Refractive Index (n20/D)	1.450 - 1.455
Density (g/mL, 20°C)	0.98 - 1.02
Inhibitor Content (MEHQ)	50 - 150 ppm
Water Content (KF)	≤ 0.1%

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