Dynasylan® VTMO works as moisture scavenger 

Dynasylan® VTMO acts as a water scavenger both in the production process and during the storage of adhesives and sealants prior to application. This enables the production of storage-stable SMP and silicone products with the required shelf life. 

Vinyl silanes such as Dynasylan® VTMO tend to hydrolyze quickly. Since Dynasylan® VTMO reacts faster with water than the moisture-curing polymers used, they are used as drying agents (water scavengers) in moisture-curing SMP and, in some cases, silicone systems. Even the most minute traces of moisture are thus eliminated. In this way, Dynasylan VTMO protects the polymers used from pre-curing. . 

At the same time, the drying properties of the silane also improve the storage stability of the adhesive or sealant by absorbing water from the environment. 

Moreover, Dynasylan® VTMO improves adhesion strength in wet conditions and resistance to abrasion. This reaction also takes place when the formulation contains further silanes. Besides Dynasylan® VTMO Evonik offers further products as moisture scavengers

The drying agent is subject to additional requirements depending on the end application, e.g., a high flash point or low volatility. In such cases, Dynasylan® 6490, an oligomeric and environmentally friendly drying agent from the Evonik portfolio, is recommended. 

Evonik’s silane experts continuously enhance their products: Depending on the respective requirement, they develop new custom solutions together with customers to ensure that the adhesive or sealant is durable even under challenging conditions. 

• Prevents premature crosslinking during the manufacture and storage of adhesives and sealants 
• Improves the storage properties of adhesives and sealants 
• Better adhesion and mechanical properties 
• Longer shelf life