Description

Poly(Dimethoxysiloxane) is a versatile organosilicon polymer characterized by its methoxy-functional siloxane backbone. This compound is valued for its role as a reactive intermediate and precursor in silicone chemistry, enabling the synthesis of modified siloxanes and silane coupling agents. It is essential for manufacturers in the adhesives, sealants, coatings, and specialty chemical industries seeking to impart specific properties like improved adhesion, crosslinking, or surface modification.

Application

• Silicone Resin & Polymer Modification: Acts as a key building block for synthesizing custom silicone resins, elastomers, and fluids with tailored properties.
• Crosslinking Agent: Serves as a reactive crosslinker in moisture-curing silicone sealants, adhesives, and RTV (Room Temperature Vulcanizing) rubbers.
• Surface Treatment & Coupling Agent Precursor: Used to manufacture silane coupling agents that enhance adhesion between organic polymers and inorganic substrates like glass, metals, and minerals.
• Hydrophobic Coatings: A precursor for creating water-repellent and release coatings on various surfaces, including textiles, paper, and construction materials.
• Intermediate for Specialty Chemicals: Employed in the synthesis of more complex functional siloxanes used in personal care products, defoamers, and lubricants.
• Filler Treatment: Used to treat inorganic fillers (e.g., silica, calcium carbonate) to improve their compatibility and dispersion in polymer matrices.

Basic Information

Product Name	Poly(Dimethoxysiloxane)
CAS No.	25498-02-6
Molecular Formula	(C2H6O2Si)n
Molecular Weight	Varies by chain length (n)
Synonyms	Poly(dimethoxysiloxane); Dimethoxypolysiloxane; Methoxy-Terminated Polydimethylsiloxane; Poly[oxy(dimethylsilylene)], α,ω-dimethoxy-; Polydimethylsiloxane, dimethoxy terminated; PDMS, dimethoxy terminated; Siloxanes and Silicones, di-Me, methoxy-terminated; α,ω-Dimethoxypolydimethylsiloxane
EINECS	Contact for details

Quality Control

Our Poly(Dimethoxysiloxane) is produced under stringent quality management systems. Each batch undergoes rigorous analytical testing to ensure consistency in molecular weight distribution, methoxy content, viscosity, and purity. Certificates of Analysis (COA) detailing specifications and test results are provided to guarantee the material meets your technical requirements for advanced synthesis and formulation.

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). Keep the container tightly sealed under a dry inert atmosphere (e.g., nitrogen) to prevent hydrolysis and maintain product integrity.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Viscosity (25°C)	Specified grade dependent (cSt)
Methoxy Content (Assay)	Specified grade dependent (%)
Molecular Weight (Average)	Specified grade dependent
Water Content	< 0.5% (by Karl Fischer titration)
Acidity (as HCl)	< 0.1%

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