Methyltrimethoxysilane CAS No.1185-55-3

Chemical Identification

• Product Name: Methyltrimethoxysilane

• Abbreviation: MTMS

• Chemical Formula: CH₃Si(OCH₃)₃

• CAS Number: 1185-55-3

• EC Number: 214-685-0

• Appearance: Clear, colorless liquid

• Odor: Mild alcoholic odor

Key Properties

• Excellent hydrolyzability and reactivity

• Provides strong adhesion between organic polymers and inorganic substrates

• Enhances water repellency and weather resistance

• Low molecular weight with good penetration capability

• Compatible with many resin systems

These properties make MTMS a versatile silane for industrial and construction-related applications.

Applications

Methyltrimethoxysilane is used across multiple industries:

• Coatings & Paints
  Improves adhesion, hardness, and moisture resistance.

• Sealants & Adhesives
  Functions as a crosslinking agent to enhance bonding strength and durability.

• Construction Materials
  Used in concrete, stone, and mineral surface treatments for hydrophobic modification.

• Silicone & Resin Modification
  Acts as a raw material or intermediate in silicone resins and silane-modified polymers.

• Surface Treatment
  Improves compatibility between fillers, pigments, and polymer matrices.

Packaging & Storage

• Supplied in drums, IBCs, or bulk packaging

• Typical packaging sizes: 200 kg drums (custom options available)

• Store in a cool, dry, well-ventilated area

• Keep containers tightly closed and away from moisture and ignition sources

Safety & Handling

• Flammable liquid and vapor

• Avoid contact with moisture during storage

• Use appropriate personal protective equipment (PPE)

• Handle according to standard industrial chemical safety practices

Frequently Asked Questions (FAQs)

What is Methyltrimethoxysilane mainly used for?

It is primarily used as a coupling agent, crosslinker, and surface modifier in coatings, sealants, adhesives, and construction materials.

Is MTMS soluble in water?

MTMS reacts with water and hydrolyzes rather than dissolving. It should be stored and handled under dry conditions.

Can Methyltrimethoxysilane improve water resistance?

Yes. MTMS significantly enhances hydrophobicity and moisture resistance when applied to surfaces or incorporated into formulations.

Is MTMS suitable for construction applications?

Yes. It is widely used in concrete, stone, and mineral surface treatments to improve durability and water repellency.

Can this product be used in silicone resin production?

Yes. MTMS is commonly used as a raw material or modifier in silicone and silane-based resin systems.

Is Methyltrimethoxysilane available for export?

Yes. It is regularly supplied for international markets with compliant packaging and documentation.

Why Choose Us

• Reliable and stable supply

• Export-oriented packaging standards

• Experience with organosilane chemicals

• Professional support for logistics and documentation

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