Description

Bis[(3-Methyldimethoxysilyl)Propyl]Polypropylene Oxide CAS NO 75009-88-0 is a specialized organosilicon compound featuring a polyether backbone terminated with reactive methoxysilyl groups. This unique structure makes it a highly effective coupling agent and adhesion promoter, bridging organic polymers and inorganic surfaces. It is essential for formulators and manufacturers in the sealant, adhesive, and coatings industries seeking to enhance product performance, durability, and compatibility.

Application

• As a key adhesion promoter in high-performance silicone-modified organic sealants and adhesives.
• As a coupling agent in filled polymer systems (e.g., silica-filled rubbers) to improve filler dispersion and mechanical properties.
• As a surface modifier for inorganic materials like glass, metals, and minerals to enhance compatibility with organic resins.
• In the formulation of moisture-curable systems where its methoxysilyl groups enable crosslinking upon exposure to atmospheric moisture.
• As an additive in coatings and inks to improve substrate wetting, adhesion, and flexibility.
• For the synthesis of advanced polymeric materials and block copolymers with tailored properties.

Basic Information

Product Name	Bis[(3-Methyldimethoxysilyl)Propyl]Polypropylene Oxide
CAS No.	75009-88-0
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Polypropylene glycol bis(3-(methyldimethoxysilyl)propyl) ether; α,ω-Bis[(3-methyldimethoxysilyl)propyl] poly(oxypropylene); Silane-terminated poly(propylene oxide); Methoxysilyl-functional polyether; Adhesion promoter 75009-88-0; Silylated polyether; STP-E polymer
EINECS	Contact for details

Quality Control

Our Bis[(3-Methyldimethoxysilyl)Propyl]Polypropylene Oxide is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure consistency in composition, reactivity, and performance. Certificates of Analysis (COA) detailing key parameters such as assay, viscosity, and moisture content are available upon request 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). This product is hygroscopic (moisture-sensitive). Keep the container tightly sealed under a dry inert atmosphere (e.g., nitrogen) to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms
Assay	≥ 95.0%
Viscosity (25°C)	Contact for details
Moisture (Karl Fischer)	≤ 0.5%
Specific Gravity (25°C)	Contact for details

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