polythf 2900 ptmeg3000 molecular weight 25190-06-1
chemical name ：polytetramethylene ether glycol; polytetrahydrofuran
cas number : 25190-06-1
molecular formula : c8h18o4
purpose : ptmeg is mainly used to produce polyurethane elastomers, polyurethane elastic fibers (domestically known as spandex, internationally known as spandex) and ester-ether copolymer elastomers.
product packaging ：200kg, barreled
|
test parameters |
unit |
test method |
eigenvalue |
|
hydroxyl content |
mgkoh/g |
ksm0065 |
37.4~40.1 |
|
molecular weight |
g/mol |
calculate value |
2800~3000 |
|
water content |
mg/kg |
ksm0010 |
max. 150 |
|
acidity |
mgkoh/g |
ksm0065 |
max. 0.05 |
|
chroma |
apha |
ksm9172 |
max. 40 |
|
bhtcontent |
mg/kg |
uv |
200~350 |