Silane End Cappers
3-Isocyanatopropyltrimethoxysilane | Manta S310
Manta S310 is γ-isocyanatopropyltrimethoxysilane (CAS 15396-00-6), a trimethoxy isocyanate silane with very fast hydrolysis and crosslinking in atmospheric moisture, releasing methanol as the by-product. It is used to end-cap diols and polyols in MS polymer and SPUR manufacture, and as a crosslinker and adhesion promoter in fast-curing automotive glass primers and hybrid adhesives.
- Grade
- S310
- Chemical Name
- γ-Isocyanatopropyltrimethoxysilane
- CAS No.
- 15396-00-6
- EINECS
- 239-415-9
- Synonyms
- Trimethoxy(3-isocyanatopropyl)silane; 3-(Trimethoxysilyl)propyl isocyanate
- Form
- Colorless transparent liquid
Overview
Manta S310 is a bifunctional organosilane with a highly active isocyanate group and a hydrolyzable trimethoxysilyl group. The isocyanate functionality reacts rapidly with most active hydrogen-containing compounds, such as hydroxyl, amino and mercapto groups. The silane portion can then crosslink on moisture exposure or bond chemically to a wide variety of inorganic substrates.
As an end-capping agent for diols or polyols, S310 is used to manufacture silane-modified polymers (SMP) and SPUR, enabling one-part moisture-curable urethane adhesives, sealants and coatings without free unreacted isocyanates.
S310 is the trimethoxy counterpart of Manta S320. Its methoxy groups give very fast hydrolysis and crosslinking in atmospheric moisture and release methanol, while the triethoxy S320 gives a slightly more controlled moisture cure and releases ethanol. For lower crosslink density, Manta S121 is the dialkoxy grade.
Key Features
- Reactive with -OH, -NH2 and -SH functional polymers
- Trimethoxy groups give very fast hydrolysis and crosslinking in atmospheric moisture
- Adhesion promotion, wet and dry, on glass, metals and inorganic minerals
- Siloxane bonds with good thermal, chemical and UV stability
- Releases methanol on hydrolysis
Cross-Reference
Manta S310 can be considered as an alternative to Momentive Silquest A-Link 35, Wacker GENIOSIL GF 40 and Shin-Etsu KBM-9007.
Trademarks are the property of their respective owners; no affiliation is implied.
Specifications
| Property | Typical Value |
|---|---|
| Molecular Weight | 205.28 |
| Appearance | Colorless transparent liquid |
| Purity (by GC, %) | 97.00 min |
| Density (ρ20°C, g/cm³) | 1.020~1.080 |
| Refractive Index (n25/D) | 1.4100~1.4300 |
| Boiling Point | >200°C |
| Flash Point | 99 °C closed cup |
Typical values from the current Technical Data Sheet.
Applications
- SMP and SPUR manufacture: end-capping agent for diols or polyol polymers, enabling one-part moisture-curable urethane adhesives, sealants and coatings without free unreacted isocyanates
- Adhesion promoter: silicone sealants, polyurethane paints and hybrid adhesives that need adhesion to organic plastics such as nylon, or to inorganic substrates where active hydrogen species are present
- Resin crosslinking: modifier for hydroxyl-bearing resins such as acrylic resins and PVA, and for alkoxy-silyl crosslinked fluororesin fluids, improving chemical resistance and weatherability
- Reactive additive: one-part moisture-curable and two-part reactive polyurethane systems
- Automotive glass primers: fast-curing polyurethane primers for automotive glass replacement (AGR) and direct glazing, providing adhesion to glass substrates
Related applications: Adhesives & Sealants · Paints & Coatings · Plastics & Masterbatches
Packaging & Storage
Supplied in 20 kg, 25 kg iron pail, 200 kg drum.
Safety and Storage
- Moisture Sensitivity Warning (CRITICAL): This product is an isocyanate derivative and is extremely sensitive to moisture. Contact with water or ambient humidity will cause rapid hydrolysis, polymerization, and the generation of carbon dioxide (CO2) gas, which can pressurize and rupture closed containers.
- Storage: Must be stored in a cool, strictly dry, and well-ventilated area away from direct sunlight. After opening, containers must be purged with a dry inert gas (Nitrogen or Argon) and resealed instantly.
- Shelf Life: Minimum 12 months in original, unopened containers under proper storage conditions.
- Transportation: Classified and shipped as a hazardous substance. Consult the Material Safety Data Sheet (MSDS) for comprehensive handling instructions.
Documents
- Technical Data Sheet · PDF Download TDS
- SDS and COA · on request Request Documents
Frequently Asked Questions
How is Manta S310 used to manufacture MS polymers and SPUR prepolymers?
It end-caps diols or polyols to create silane-terminated polymers, enabling one-part moisture-curable urethane adhesives, sealants and coatings without free unreacted isocyanates.
Why is moisture control critical when handling Manta S310?
S310 is an isocyanate derivative and is extremely sensitive to moisture. Contact with water or ambient humidity causes rapid hydrolysis and polymerization with generation of carbon dioxide gas, which can pressurize and rupture closed containers. After opening, purge containers with dry nitrogen or argon and reseal them immediately.
Should I pick Manta S310 or Manta S320 for my formulation?
S310 has trimethoxy groups that hydrolyze and crosslink very fast in atmospheric moisture and release methanol. S320 is the triethoxy version, which releases ethanol and gives a slightly more controlled moisture cure. The choice depends on the cure speed and hydrolysis by-product your system calls for.
What role does Manta S310 play in automotive glass replacement (AGR)?
It is a component of fast-curing polyurethane primers for AGR and direct glazing, providing adhesion to glass substrates.
How long can Manta S310 be stored, and how is it shipped?
S310 is classified and shipped as a hazardous substance and is supplied in 20 kg, 25 kg iron pail, 200 kg drum. Store it in a cool, strictly dry, well-ventilated area away from direct sunlight. The minimum shelf life is 12 months in original, unopened containers under proper storage conditions.
Related Products
S310 is one step in the sealant and adhesive formulation chain. One inquiry can cover the other raw materials in your formulation, with samples, technical documents, quotation and shipment handled together.
Looking for a different purity, functional group, or a structure not listed here? Contact our technical team.
Talk to our technical team
Tell us your application, target properties and estimated quantity. We will suggest grades and arrange documents or samples.