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Clear silicone-modified silane-terminated polyether discharging from a stainless steel reactor outlet (Manta MS350)
High-Reactivity STPE

Alpha MS Polymer for Wood Bonding | Manta MS350

Manta MS350 is a silicone-reinforced, polyether-based silane-terminated polymer used as a clear, low-viscosity, highly reactive binder for moisture-curing wood bonding adhesives. It complements elastic adhesive polymers, can be blended with them in different ratios to adjust application properties, and can be formulated with tin-free catalyst systems.

Grade
MS350
Chemical Name
Silicone-modified silane-terminated polyether
Form
Transparent liquid
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Overview

Manta MS350 is a silicone-reinforced, polyether-based silane-terminated polymer for moisture-curing adhesive formulations. It is a clear, low-viscosity, highly reactive polymer that complements elastic adhesive polymers and can be blended with them in different ratios to adjust application properties.

MS350 hydrolyzes readily on exposure to moisture, releasing methanol, and cures with atmospheric moisture to a stable siloxane network. Organometallic catalysts are not required for curing and tin-free catalyst systems can be used; dioctyltin (DOT) compounds are an option where a specific cure profile or faster reaction is required. The low viscosity gives broad formulation latitude without solvents or plasticizers.

Compared with Manta MS310A, another high-activity silane-terminated polymer, MS350 is silicone-modified and much lower in viscosity: 500 – 1,000 mPa·s at 25 °C versus 8,000 – 12,000 mPa·s at 25 °C. Because MS350 is highly reactive, it is supplied only in the steel drum listed under packaging on this page.

Key Features

  • Easy compounding with conventional additives
  • Low viscosity gives broad formulation latitude without solvents or plasticizers
  • Tin-free catalyst systems possible
  • Fast cure to a tack-free surface
  • Adhesion to a wide range of substrates
  • Long shelf life of the formulated product
  • Can be blended with other Manta silane-terminated polymers to adjust flexibility or modulus

Cross-Reference

Performance similar to Wacker GENIOSIL XT 50.

Trademarks are the property of their respective owners; no affiliation is implied.

Specifications

Typical properties of Manta MS350
PropertyTypical Value
AppearanceTransparent liquid
Viscosity (25 °C)500 – 1,000 mPa·s
Density (25 °C)1.13 g/cm³
ActivityHigh

Typical values from the current Technical Data Sheet.

Applications

  • Wood bonding adhesives: clear, low-viscosity moisture-curing binder that can be blended with elastic adhesive polymers to adjust application properties

Processing

Manta MS350 dissolves in common organic solvents and is practically insoluble in water. On exposure to moisture it hydrolyzes readily, releasing methanol, and starts to crosslink. Moisture must therefore be excluded during storage and processing to prevent premature gelation or an increase in viscosity.

MS350 can be processed with conventional compounding methods and mixing equipment. To adjust the flexibility or modulus of MS350-based formulations, it can be blended with other Manta silane-terminated polymers.

Organometallic catalysts are not required for curing; dioctyltin (DOT) compounds can be used if a specific cure profile or faster reaction is required.

Related applications: Adhesives & Sealants

Related reading: Difference Between MS, STPE, SMP, STPU and SPU

Packaging & Storage

200 kg steel drum with aluminum-foil liner bag. This is the only packaging for Manta MS350.

No other packaging is available. MS350 is not supplied in 50 kg plastic drums, 1,000 kg IBCs (totes) or any other pack size, and this cannot be changed on request.

Why only the 200 kg steel drum: MS350 is highly reactive. If moisture reaches the product, it hydrolyzes, releases methanol and starts to crosslink. An IBC does not seal as well as a 200 kg steel drum, so moisture can get in more easily during storage and transport. The product would then hydrolyze in the container, and its viscosity could rise or it could gel. The 200 kg steel drum seals better and protects the product from moisture.

Safety and Storage

Store in the tightly closed original 200 kg steel drum in a cool, dry place, protected from moisture and direct sunlight. Shelf life: 16 months from the date of production when stored as recommended. The product is classified as non-hazardous. Refer to the current Safety Data Sheet (SDS) for safety, handling and transport information.

Note: The values in this data sheet are typical values and are not intended for use in preparing specifications. Users should test the product to determine its suitability for their specific application.

Documents

Frequently Asked Questions

Why is Manta MS350 well suited to wood bonding adhesives?

MS350 is a clear, low-viscosity polymer (500 – 1,000 mPa·s at 25 °C) that gives broad formulation latitude without solvents or plasticizers, cures quickly to a tack-free surface and adheres to a wide range of substrates. Wood bonding adhesives are its listed application.

How can the flexibility or modulus of MS350 formulations be adjusted?

MS350 can be blended with other Manta silane-terminated polymers in different ratios to adjust flexibility or modulus. Conventional compounding methods and mixing equipment can be used.

Does MS350 need an organometallic catalyst to cure?

No. Organometallic catalysts are not required for curing, and tin-free catalyst systems are possible. Dioctyltin (DOT) compounds can be used if a specific cure profile or faster reaction is required.

Can Manta MS350 be supplied in IBCs or plastic drums?

No. MS350 is supplied only in a steel drum with an aluminum-foil liner bag, and this cannot be changed on request. MS350 is highly reactive, and an IBC does not seal as well as the steel drum, so moisture can get in more easily during storage and transport. The product would then hydrolyze in the container, and its viscosity could rise or it could gel.

How long does MS350 remain usable in storage?

Store in the tightly closed original 200 kg steel drum in a cool, dry place, protected from moisture and direct sunlight. Shelf life: 16 months from the date of production when stored as recommended. The product is classified as non-hazardous. Refer to the current Safety Data Sheet (SDS) for safety, handling and transport information. Moisture must be excluded during storage to help limit premature gelation or an increase in viscosity.

Need a finished adhesive or sealant rather than the polymer? See our custom MS adhesives and sealants service.

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