Silane Terminated Polyether

Introduction

SiSiB® STP51303 is alkoxy silane terminated polyether polymer. It could be used in moisture curing elastic sealant, elastic structure sealant and sealing coatings to achieve excellent adhesion to various substrates.

SiSiB® STP51303 based system is free of solvent, isocyanate, bubbles and odor during curing, which is quite different from polyurethane and silicone system. It is especially suitable for construction industry, transportation industry and general industry application.

Physical Properties

Features

• Moderate Activity , Moderate Modulus

• Good adhesion strength

• Fast curing , non-tin catalysts used if needed

• Excellent anti-aging, anti-yellowing property

• Excellent water resistance, chemical corrosion resistance

• Excellent elastic recovery rate

• Excellent storage stability

• Solvent free, odorless, eco-friendly

• Could be blended with other STP polymers

Application

SiSiB® STP51303 polymer can be 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-component system.

• Low modulus construction sealant

• Transportation industry elastic sealant

• Personal DIY sealant

• Eco-friendly decoration sealant

Processing

• SiSiB® STP51303 polymer dissolves readily in standard organic solvents. It is virtually insoluble in water. Despite its highly reactive terminal groups, uncatalyzed STP51303 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® STP51303 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.