PTMEG

polytetramethylene Ether Glycol (PTMEG) is a linear polyether diol polymerized from tetrahydrofuran (THF), which is derived from 1,4-butanediol. At room temperature, it appears as white waxy solid, and turns into colorless transparent viscous liquid after heating.

Product Introduction

Polytetramethylene Ether Glycol (PTMEG) is a linear polyether diol polymerized from tetrahydrofuran (THF), which is derived from 1,4-butanediol. At room temperature, it appears as white waxy solid, and turns into colorless transparent viscous liquid after heating.

PTMEG features excellent elasticity, low-temperature resistance, hydrolysis resistance, wear resistance and high tensile strength. It is the key soft segment material for high-performance elastic products. It is primarily used for manufacturing spandex (elastane), thermoplastic polyurethane (TPU), thermoplastic polyester elastomer (TPEE), high-grade polyurethane elastomers, sealants and special adhesives.

Basic Specifications

Item Common Standard Index

Chemical Name Polytetramethylene Ether Glycol (PTMEG)

Abbreviation PTMEG

Appearance White waxy solid (25 °C); Colorless viscous liquid (above 30 °C)

Common Molecular Weight 1000 / 1800 / 2000 (main commercial grades)

Hydroxyl Value (mgKOH/g) 107~117 (MW1000) / 54~58 (MW2000)

Water Content (wt%) ≤0.03

Acid Value (mgKOH/g) ≤0.05

Melting Range 26 ~ 30 °C

Viscosity (40 °C, mPa·s) 350 ~ 550

Main Applications