Silane Terminated Polyether

Introduction

SiSiB® STP31351 is an alkoxy silane terminated polyether polymer. It could be applied in moisture curing elastic sealant, elastic structure sealant and sealing coatings. Sealants based on SiSiB® STP31351 not only have excellent adhesion properties, but also have adhesion to broad range of substrates. Different from polyurethane and silicone system, this formulation have no solvent and isocyanate, as well as no bubbles and odor generated from curing. It is especially suitable for construction industry, transportation industry and general industry application.

Physical Properties

Features

• High Activity , Medium-High Modulus

• High transparence

• Good adhesion strength and tensile elasticity

• Fast curing , non-tin catalysts used if needed, more eco-friendly

• Excellent aging and yellowing resistance

• Excellent water resistance , resistance to chemical corrosion

• Excellent storage stability

• Solvent free , odorless , eco-friendly

Application

SiSiB® STP31351 polymer is used as base polymer in elastic sealants, elastic structure sealants, encapsulate adhesives and coatings. The curing mode of the polymer is moisture curing. It can be made into a single component or two-components system.

• High Modulus sealant

• Transportation industry elastic sealant

• Industrial sealant

• Personal DIY sealant

• Eco-friendly decoration sealant

Processing

• SiSiB® STP31351 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 STP31020 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 starts to condensate.

• SiSiB® STP31351 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, particularly for vinyltrimethoxysilane.