Polytetramethylene Ether Glycol PTMEG 2000
CAS 25190-06-1
HO-(C₄H₈O)ₙ-H
Chemicals
MW: ~2,000 g/mol (Mn)
Physical & Chemical Specifications
| Property | Specification | Test Method |
|---|
| Hydroxyl Number | 54–61 mg KOH/g | ASTM E1899 |
| Number-Average MW (Mn) | 1,800–2,200 g/mol | GPC |
| Viscosity (50°C) | 1,100–1,500 mPa·s | Brookfield |
| Water Content (KF) | ≤ 0.05% | Karl Fischer |
| Color (APHA, 50°C) | ≤ 15 | ASTM D1209 |
| Acid Value | ≤ 0.05 mg KOH/g | Titration |
| Peroxide Value | ≤ 5 meq/kg | Titration |
| Appearance (25°C) | White waxy solid | Visual |
Typical Applications
- High-elongation polyurethane elastomers
- High-MW Spandex / Lycra® soft segment
- Copolyester-ether (COPE/TPC-ET) synthesis
- Soft-touch TPU for footwear & film
- High-performance coatings & adhesives
Packaging
200 kg iron drums; 1,000 kg IBC
Storage & Shelf Life
Below 30°C. Nitrogen blanket recommended. Shelf life: 12 months.
All values are typical and may vary by lot. This TDS does not constitute a warranty.
Contact TKNCO for lot-specific Certificate of Analysis (COA).