Methyltrimethoxysilane (MTMS) | Manta 931

Manta 931 is methyltrimethoxysilane (MTMS, CAS 1185-55-3, ≥99% purity by GC, density 0.950 g/cm³) used as the primary crosslinker for neutral-cure RTV silicone sealants and as a hydrophobic surface modifier for fillers and masonry. It is comparable to Silquest A-1630, Dynasylan MTMS and KBM-13, with a ≥99.5% electronic grade available for electronics encapsulation.

Manta 931 is a fundamental alkyl-alkoxy organosilane. Featuring a non-polar methyl group and three highly reactive methoxy groups, it serves as the primary crosslinking agent for neutral-cure Room Temperature Vulcanizing (RTV) silicone sealants.

Beyond sealants, it is an essential monomeric building block for the synthesis of advanced silicone resins and acts as a highly effective hydrophobic (water-repellent) surface modifier for inorganic fillers and various substrates.

It is equivalent to industry benchmarks such as Momentive Silquest A-1630, Dow Z-6070, Evonik Dynasylan MTMS, WACKER M1-Trimethoxy, and Shin-Etsu KBM-13.

Features

• Reliable Crosslinking: The three methoxy groups hydrolyze to form highly reactive silanols, driving the condensation-cure mechanism in silicone rubber and producing dense 3D siloxane networks.
• High Hydrophobicity: The tightly bound methyl group imparts exceptional water-repellency to treated substrates and mineral fillers without altering their appearance.
• High Purity (Electronic Grade): The ≥ 99.5% electronic-grade variant ensures ultra-low ionic impurities, making it ideal for the encapsulation and potting of sensitive electronic and photovoltaic components.
• Solvent Miscibility: Highly miscible with standard organic solvents, including alcohols, aliphatic hydrocarbons, and ketones.

Manta 931 serves as the primary crosslinking agent for neutral-cure Room Temperature Vulcanizing (RTV) silicone sealants.

Beyond sealants, it is an essential monomeric building block for the synthesis of advanced silicone resins and acts as a highly effective hydrophobic (water-repellent) surface modifier for inorganic fillers and various substrates.

It is equivalent to industry benchmarks such as Momentive Silquest A-1630, Dow Z-6070, Evonik Dynasylan MTMS, WACKER M1-Trimethoxy, and Shin-Etsu KBM-13.

Manta 931 is an indispensable raw material utilized across mass-market and high-tech industries:

1. RTV Silicone Sealants & Adhesives:

The most critical crosslinking agent for neutral-cure (alkoxy-type) room temperature vulcanizing silicone sealants, providing excellent shelf life and consistent curing profiles.

2. Inorganic Filler & Pigment Modification:

Used extensively to surface-treat mineral fillers (e.g., silica, talc, mica, ATH) and pigments. It renders these powders highly hydrophobic, drastically improving their dispersion and compatibility within organic polymer matrices.

3. Silicone Resin Synthesis:

Acts as a fundamental monomeric building block in the polymerization and manufacturing of advanced organic silicone resins.

4. Water Repellents & Substrate Protection:

Applied directly or in solution to render porous materials—such as masonry, glass, and cardboard—highly water-repellent.

5. Fiberglass & Composites:

Utilized as a sizing and binder additive for glass fiber-reinforced plastic (FRP) laminates, enhancing the interfacial bond between the glass fibers and the polymer matrix.

6. Aerogel Synthesis: Serves as a fundamental core monomer in the sol-gel synthesis of highly hydrophobic silica aerogels, critical for manufacturing the world’s most advanced and lightweight thermal insulation materials.