Methyltriethoxysilane CAS: 2031-67-6

Methyltriethoxysilane CAS: 2031-67-6
Methyltriethoxysilane CAS: 2031-67-6
Methyltriethoxysilane CAS: 2031-67-6
Methyltriethoxysilane CAS: 2031-67-6
Methyltriethoxysilane CAS: 2031-67-6
Methyltriethoxysilane CAS: 2031-67-6
Methyltriethoxysilane CAS: 2031-67-6
Methyltriethoxysilane CAS: 2031-67-6
Methyltriethoxysilane CAS: 2031-67-6
Methyltriethoxysilane CAS: 2031-67-6
Methyltriethoxysilane CAS: 2031-67-6
Methyltriethoxysilane CAS: 2031-67-6
Methyltriethoxysilane CAS: 2031-67-6
Methyltriethoxysilane CAS: 2031-67-6
Methyltriethoxysilane CAS: 2031-67-6
Methyltriethoxysilane CAS: 2031-67-6
Methyltriethoxysilane CAS: 2031-67-6
Methyltriethoxysilane CAS: 2031-67-6

Methyltriethoxysilane CAS: 2031-67-6

Product Description

Methyltriethoxysilane (MTES, CAS 2031-67-6) is a clear, colorless, low-viscosity monomeric alkoxysilane with a mild ester-like odor. As a versatile organosilicon precursor, it features three hydrolyzable ethoxy groups and one stable methyl group, enabling controlled hydrolysis and condensation to form flexible, hydrophobic siloxane networks. It delivers excellent water repellency, surface modification, resin crosslinking and sol-gel film-forming performance. Widely used as a hydrophobic agent, crosslinker, coupling additive and silicone intermediate in construction chemicals, coatings, electronics, foundry and advanced materials.

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Introduction

Available Forms:

Technical Grade (Purity ≥98.0%)

High Purity Grade (Purity ≥99.0%)

Pre-hydrolyzed Sol Solution (customized solid content and hydrolysis degree)

Available Package:

200kg steel drum

1000kg IBC tote

Key Applications:

  1. Water Repellent & Hydrophobic Treatment​ – Imparts durable, breathable water and moisture resistance to mineral substrates such as concrete, natural stone, brick, mortar, sandstone and cultural relics protection.
  2. Silicone Resin & Rubber Crosslinker​ – Key crosslinking agent for room-temperature vulcanizing (RTV) silicone rubber, silicone sealants and methyl silicone resins, improving flexibility and weatherability.
  3. Sol-Gel & Silica Materials​ – Silicon source and network modifier for aerogels, hydrophobic silica, anti-reflective coatings and porous materials; slower hydrolysis rate vs. methoxy analogues allows better process control.
  4. Coatings & Paints​ – Additive to improve weatherability, water resistance, anti-graffiti properties and pigment dispersion in architectural and industrial coatings.
  5. Glass Fiber & Composite Sizing​ – Surface treatment agent for glass fibers, silica fillers and mineral reinforcements to improve compatibility with polymer matrices.
  6. Electronic Encapsulation & Coatings​ – Moisture-resistant coating and encapsulant precursor for semiconductors, PCBs, sensors and electronic components.
  7. Foundry & Refractory Binders​ – Binder component for precision investment casting shells and high-temperature refractory materials, enhancing shell strength and thermal stability.
  8. Leather & Textile Finishing​ – Imparts soft, durable water repellency and stain resistance to fabrics, leather and synthetic materials.
  9. Adhesion Promoter & Surface Primer​ – Enhances bonding between organic coatings, adhesives and inorganic substrates (glass, metal, ceramics).

Features:

Controlled hydrolysis rate (slower than methoxy silanes) for better processability

Forms flexible, hydrophobic Si–CH₃ and Si–O–Si networks

Excellent water repellency and low surface energy

Good compatibility with organic resins, solvents and other silanes

Low viscosity, easy blending and homogeneous distribution

Stable storage in sealed, moisture-free containers

Effective across a wide pH range with suitable acid/alkali catalysts

Typical Industries Served:

Construction Chemicals | Coatings & Paints | Silicone Rubber & Sealants | Electronics | Glass & Ceramics | Composites | Aerogels & Advanced Materials | Textiles & Leather

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FAQ

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What are the payment terms?

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We offer comprehensive services including product customization, flexible packaging, sample support, professional QC testing, on-time delivery, and after-sales technical guidance to ensure your satisfaction.

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How soon can the goods be shipped after placing an order?

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We will take the transaction date as the starting point and make every effort to arrange shipment as quickly as possible. The specific shipping time will depend on product inventory and production schedules, and we will keep in close communication with you throughout the process to ensure you are always informed of the logistics progress.

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Which currencies are accepted for payment?

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We accept both USD and RMB, making it convenient for you to choose the most suitable settlement method.

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How do you ensure product quality?

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We support a "sample first, payment later" approach. You may obtain samples for testing first and only make the payment after confirming that the samples meet your requirements. In addition, we can provide product testing reports upon your request, and take photos or videos during the shipping process, giving you complete peace of mind.

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What does the after-sales service include?

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For different products, we provide comprehensive after-sales support covering everything from basic performance service to quality assurance. For detailed after-sales terms and scope, please refer to our after-sales service page.

If you have any other questions, please feel free to leave a message and we will get back to you as soon as possible.