CAS number ：25190-06-1
Molecular formula ：C8H18O4
Chemical name ：polytetramethylene ether glycol; polytetrahydrofuran
Uses ：PTMEG is mainly used in the production of polyurethane elastomers, polyurethane elastic fibers (known as spandex in domestic, Spandex in international) and ester ether copolymer elastomers.
Product packaging ：200KG barrels, loose water
|
Test parameters |
Numerical value |
testing method |
|
molecular weight |
975-1025g/mol |
Calculated |
|
Hydroxyl content |
109.5-115.1mg KOH/g |
DIN 53 240 |
|
maximum acid |
0.05 mg KOH/g |
DIN EN ISO 2114 |
|
water content |
≤150 mg/kg |
DIN 51 777 |
|
Chroma |
≤40 APHA |
DIN EN 1557 |