Description

Bis[3-(Trimethoxysilyl)Propyl] Fumarate is a specialized organosilicon compound that functions as a high-performance crosslinking agent and adhesion promoter. Its molecular structure combines the reactivity of alkoxysilane groups with the unsaturated functionality of a fumarate ester, making it a critical component for enhancing material durability and interfacial bonding. This product is essential for formulators and manufacturers in the silicone rubber, advanced sealants, adhesives, and coatings industries seeking to improve thermal stability, mechanical strength, and adhesion to various substrates.

Application

• Crosslinking Agent for Silicone Elastomers: Imparts improved heat resistance and mechanical properties to high-temperature vulcanized (HTV) and room-temperature vulcanized (RTV) silicone rubbers.
• Adhesion Promoter in Sealants & Adhesives: Enhances bonding strength of silicone-based formulations to difficult substrates like metals, glass, and plastics.
• Surface Modification Agent: Used to treat fillers (e.g., silica) and inorganic materials to improve their compatibility and dispersion within polymer matrices.
• Intermediate for Specialty Polymers: Serves as a key monomer or additive in the synthesis of advanced polyorganosiloxanes and hybrid organic-inorganic polymers.
• Component in Moisture-Curable Systems: Reacts with ambient moisture to form stable siloxane networks, contributing to the curing mechanism of one-part systems.
• Fabric Coating Additive: Used to provide durable, water-repellent, and flexible finishes to technical textiles.

Basic Information

Product Name	Bis[3-(Trimethoxysilyl)Propyl] Fumarate
CAS No.	3371-62-8
Molecular Formula	C20H38O10Si2
Molecular Weight	494.68 g/mol
Synonyms	1,2-Bis(3-(trimethoxysilyl)propyl) (E)-but-2-enedioate; 3-(Trimethoxysilyl)propyl Fumarate Dimer; Fumaric Acid Bis(3-trimethoxysilylpropyl) Ester; Bis(γ-trimethoxysilylpropyl) Fumarate; SIB1832.0 (Gelest); Fumarate Silane; Adhesion Promoter Si-163; (3-(Trimethoxysilyl)propyl) Fumarate
EINECS	Contact for details

Quality Control

Our production of Bis[3-(Trimethoxysilyl)Propyl] Fumarate adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Each lot undergoes comprehensive analytical testing, including assay, purity verification, and functional group analysis. Certificates of Analysis (COA) detailing all relevant specifications are provided and can be tailored to meet specific customer or regulatory 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). This material is hygroscopic (moisture-sensitive); containers must be kept tightly sealed to prevent degradation from atmospheric moisture. Keep away from heat and incompatible materials.

Specification

Item	Specification
Appearance	Clear to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC or HPLC)	≥ 95.0%
Color (APHA)	≤ 100
Density (at 20°C)	~1.08 g/cm³
Refractive Index (n20D)	~1.435

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