PTMEG
Key Component for Elastic Fiber Production
- Formula
- (C4H8O)n
- Density
- 982 kg/m³
- Melting point
- 23 to 28 °C (73 to 82 °F; 296 to 301 K)
- Molar mass
- Variable
- Appearance
- White, Waxy-like
Polytetramethylene ether glycol (PTMEG) is a waxy, white solid that melts to a clear, colorless, viscous liquid near room temperature. Polytetramethylene ether glycol is produced by the catalyzed polymerization of tetrahydrofuran (THF). The chief uses of Polytetramethylene ether glycol are in the production of spandex (polyurethane) fibers, polyurethane elastomers, and copolyester-ether elastomers.
Applications of PTMEG
Use of PTMEG are in the production of spandex (polyurethane) fibers, polyurethane elastomers, TPU, and copolyester-ether elastomers.
Specification
| Specification of Polytetramethylene-Ether-Glyol (PTMEG,PTG) | ||||||
| Grade | 850 | 1000 | 1400 | 1800 | 2000 | 3000 |
| Hydroxyl Number (mgKOH/g) |
126~140 | 107~117 | 77~84 | 60~65 | 53~59 | 35~39 |
| Molecular Weight | 801~890 | 959~1049 | 1336~1457 | 1726~1870 | 1901~2117 | 2877~3206 |
| Color | Max. 50 | Max. 50 | Max. 50 | Max. 50 | Max. 50 | Max. 50 |
| Acid Number (mgKOH/g) |
Max. 0.05 | Max. 0.05 | Max. 0.05 | Max. 0.05 | V | Max. 0.05 |
| Water (%) | Max. 0.02 | Max. 0.02 | Max. 0.02 | Max. 0.02 | Max. 0.02 | Max. 0.02 |