Silane Terminated Polyether

Introduction

SiSiB® STP71320 is an alkoxy silane terminated polyether polymer. It can be used in moisture curing elastic sealant, elastic structure sealant and sealing coatings to achieve excellent adhesion to broad range of substrates.

SiSiB® STP71320 is a trimethoxysilyl-terminated polyether polymer used as a base polymer in elastic sealants, elastic structure sealants, encapsulating adhesives, and coatings. It cures via moisture and can be used in both single- and two-component systems.

Properties

Features

• High activity, Low-medium Modulus, High transparence

• Good adhesion strength and tensile elasticity

• Fast curing, tin catalysts free

• Excellent aging and yellowing resistance

• Superb water resistance, solvent resistance

• Excellent elastic recovery rate and storage stability

• Solvent free, odorless, eco-friendly

Application

SiSiB® STP71320 polymer can be used as base polymer in elastic sealants, elastic structure sealants, encapsulate adhesives and coatings by moisture curing. It is suitable for both single component and two-component system.

• Transportation industry sealant

• Transparent encapsulate adhesive

• Low-Medium Modulus construction sealant

• Personal DIY sealant

• Eco-friendly decoration sealant

Processing

• SiSiB® STP71320 polymer dissolves readily in standard organic solvents. It is virtually insoluble in aqueous media, and react slowly releasing methanol and ethanol forming inert material. Despite its highly reactive terminal groups, uncatalyzed SiSiB® STP71320 is stable in air for several days. However, its reactivity with water or atmospheric humidity must be taken into account during storage and processing, since the material will slowly start to condensate.

• SiSiB® STP71320 polymer can be formulated by conventional methods and mixing processes. Water scavengers should be added to stabilize the formulations against premature curing during compounding or as a result of exposure to moisture during storage. We suggest using SiSiB® PC6110 vinyltrimethoxysilane.