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Chemical structure of 1,3,5-Tris(trimethoxysilylmethyl)isocyanurate; Tris[(trimethoxysilyl)methyl] isocyanurate; (Manta AM311)
Adhesion Promoters

Tris(trimethoxysilylmethyl) Isocyanurate | Manta AM311

Manta AM311 is 1,3,5-tris(trimethoxysilylmethyl)isocyanurate (CAS 82199-95-9), an alpha-functional isocyanurate silane used as a crosslinker and adhesion promoter in MS/STP sealants, reactive hot melt adhesives and high-temperature coatings. The alpha effect gives fast moisture curing at room temperature without organotin catalysts, and the isocyanurate core supports thermal stability.

Grade
AM311
Chemical Name
1,3,5-Tris(trimethoxysilylmethyl)isocyanurate; Tris[(trimethoxysilyl)methyl] isocyanurate;
CAS No.
82199-95-9
Formula
C15H33N3O12Si3
Form
Colorless to pale yellowish transparent liquid
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Overview

Manta AM311 is a high-molecular-weight adhesion promoter that combines a stable isocyanurate ring with three alpha-functional trimethoxysilyl groups. Because the silicon atom is separated from the nitrogen atom by a single methylene group (-CH2-), the structure shows the alpha effect: high reactivity toward moisture, with fast hydrolysis and crosslinking without organotin catalysts.

This gives formulators the thermal stability of an isocyanurate together with the fast curing of an alpha silane. The core maintains structural integrity and adhesion under sustained exposure to elevated temperatures, and AM311 enhances adhesion to difficult inorganic and organic substrates without over-crosslinking or stiffening the host polymer.

Manta S311 has the same isocyanurate core with propyl-linked trimethoxysilyl groups and a mild reactivity profile. AM311 is the methylene-linked alpha silane, selected when fast moisture curing is required. Its usable life is shorter than that of S311, so plan stock accordingly.

Key Features

  • Alpha effect drives very fast moisture curing at room temperature
  • Crosslinking systems can be designed without organotin catalysts
  • Isocyanurate core maintains structural integrity and adhesion at elevated temperatures
  • Enhances adhesion without over-crosslinking or stiffening the host polymer
  • Releases methanol on hydrolysis

Specifications

Typical properties of Manta AM311
PropertyTypical Value
Molecular Weight531.74
AppearanceColorless to pale yellowish transparent liquid
Density (ρ20°C, g/cm³)1.160 ~ 1.200
Refractive Index (n25/D)Approx. 1.4300
Purity (by GC, %)95 min

Typical values from the current Technical Data Sheet.

Applications

  • MS/STP sealants: highly reactive crosslinker and adhesion promoter for silane-modified polymers where fast curing without organotin catalysts is required
  • Hot melt adhesives: silane additive in reactive polyolefin (POR) and polyurethane (PUR) hot melts, helping to limit vaporization losses during high-temperature processing and providing fast moisture cure after application
  • Automotive and aerospace coatings: high-temperature industrial coatings and structural adhesives that experience thermal cycling and require high substrate adhesion
  • Rapid-cure adhesives: assembly-line adhesives where immediate green strength and fast deep curing are important for productivity

Related applications: Adhesives & Sealants · Paints & Coatings

Packaging & Storage

Supplied in 20 kg pail, 180 kg drum and 900 kg IBC.

Safety and Storage

Keep away from heat and open flame. When stored at or below 25 °C in the original unopened containers, this product has a usable life of 9 months from the date of production.

Documents

Frequently Asked Questions

How does Manta AM311 cure without organotin catalysts?

Its methoxy groups are highly reactive because of the alpha position of the nitrogen atom, which drives fast moisture curing at room temperature. This allows MS/STP systems to be designed without organotin catalysts. Confirm the cure profile in your own formulation.

Why is Manta AM311 chosen for reactive hot-melt adhesives?

With a molecular weight of 531.74, it helps to limit vaporization losses during the high-temperature processing of PUR and POR hot melts. Its alpha-functional groups then provide fast moisture cure and green strength after application.

What is the usable life of Manta AM311?

Keep away from heat and open flame. When stored at or below 25 °C in the original unopened containers, this product has a usable life of 9 months from the date of production. It is packed in 20 kg pail, 180 kg drum and 900 kg IBC.

Looking for a different purity, functional group, or a structure not listed here? Contact our technical team.

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