Polytetramethylene Glycol PTMG 1000
CAS 25190-06-1
HO-(C₄H₈O)ₙ-H
Chemicals
MW: ~1,000 g/mol (Mn)
Physical & Chemical Specifications
| Property | Specification | Test Method |
|---|
| Hydroxyl Number | 106–118 mg KOH/g | ASTM E1899 |
| Number-Average MW (Mn) | 950–1,050 g/mol | GPC |
| Viscosity (40°C) | 200–280 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
- Polyurethane (PU) elastomer & coating synthesis
- Spandex (Lycra®) elastic fiber production
- Thermoplastic polyurethane (TPU) compounding
- High-performance adhesives & sealants
- Polyether-ester copolymer (COPE/TPC) synthesis
Packaging
200 kg iron drums; 1,000 kg IBC
Storage & Shelf Life
Below 30°C, away from heat & light. Nitrogen blanket for long-term storage. 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).