PTMEG-1000 Polytetramethylene Etherglycol Used in Spandex Fiber, TPU, Adhesive
1. Description
PTMEG 1000 (Polytetramethylene EtherGlycol) is nominal 1000 molecular weight diol based on THF (Tetrahydrofuran) polymerization. It's enhanced reactivity make it well suited to use of polyurethane.
Manufacturing Process:
Monomer: THF Polymer: PTMG
C4H8O + H2O → H(OCH2CH2CH2CH2)nOH
2. Application
PTMEG 1000 is used extensively in the production of convention polyurethane elastomer, such as spandex fiber, coating agent of artificial leather, thermoplastic polyurethane (TPU), thermoplastic polyester elastomer and others (adhesive, foam etc.)
3. Technical Specification
| Appearance | Clear liquid |
| Average Molecular Weight | 1000 |
| Viscosity, at 40℃ | 195~245 |
| APHA Color | ≤20 |
| Hydroxyl Number, mg KOH/g | 106.9~118.1 |
| Water Content, % | ≤0.01 |
| Acid Value, mgKOH/g | ≤0.05 |
| BHT, ppm | 200~300 |
4. Physical and Chemical Properties
| Form | Liquid to waxy |
| Odor | Odorless |
| Color | Colorless |
| PH value | 7 |
| Melting point | 24℃ |
| Boiling point | ≥250℃ |
| Vapor pressure | ≤0.01 mbar (20℃) |
| Density | 0.975g/cm3 (40℃) |
| Solubility in water | Sparing soluble (20℃) |
5. Storage
PTMEG 1000 is hygroscopic and absorption of moisture would affect polyurethane reactivity and physical properties of resulting polymer. The material should be stored in sealed containers and in dry conditions, away from direct sources of light. The recommended storage temperature is between 40 ~ 45 ℃. Opened drums must be reclosed tightly immediately after drawing off material.
6. Package
200kg / drum; ISO Tank Container
7. Handling Precautions
PTMEG 1000 has very low odor of acute toxicity and does not present a significant health hazard to users. Normal standards of industrial hygiene should however be observed when handling this chemical.Suitable protective clothing and safety glasses must be worn to avoid unnecessary contacts and accidental ingestion. In case of skin or eye contact, wash promptly with copious amount of clean water. In case of eye contact, seek medical attention.
PTMEG polyether glycol will burn under certain condition and can explode if heated to decomposition temperature in a confined area. Polyols fires can be extinguished with water fog, carbon dioxide or dry chemicals.
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