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| Place of Origin: | CHINA |
| Brand Name: | ExceedChem |
| Certification: | ISO9001:2008 |
| Model Number: | PTMEG 250 |
| Minimum Order Quantity: | 1000kg |
|---|---|
| Price: | FOB QINGDAO USD3.6/kg |
| Packaging Details: | 200kg/drum, ISO tank |
| Delivery Time: | within two weeks after confirming the order |
| Payment Terms: | T/T, L/C at sight |
| Supply Ability: | 1000tons per year |
| Appearance: | Clear And Transparent Liquid | CAS NO.: | 25190-06-1 |
|---|---|---|---|
| Molecular Weight: | 250 | Characteristics: | Excellent Low-temperature Elasticity, Microbial Resistance And Hydrolysis Stability |
| Packing: | 200kg/drum, ISO Tank | Application: | Used In Elastomer Block Polymers |
PTMEG 250 Used in Elastomer Block Polymers CAS NO.: 25190-06-1
Introduction
PTMEG is a linear polyether glycol with hydroxyl groups at both ends of the molecule, which is formed by ring-opening polymerization of tetrahydrofuran.
Application
PTMEG has excellent reactivity and is widely used in elastomer block polymers, showing excellent low-temperature elasticity, microbial resistance and hydrolysis stability, including polyurethane fiber (spandex), polyurethane elastomer, synthetic Leather, coating, adhesive, sealant, polyester elastomer and polyamide elastomer.
Specification
| Type | PTMEG 250 |
| Appearance | Clear and transparent liquid |
| Molecular Weight g/mol |
220-300 |
| Hydroxyl No., mgKOH/g | ＜500 |
| Water, ppm | ≤300 |
| Color, APHA | ≤50 |
Package
200kg / drum or ISO tank for packaging and transportation.
Storage and Handling
Because PTMEG is hygroscopic and oxidized, it is very important to protect PTMEG against exposure to moisture and air.
Our PTMEG contain oxidation inhibitors to prevent peroxides. PTMEG is ignitable at high temperature. Water spray, alcohol resistant foam, dry chemical or CO2 extinguishers may be used to fight fire. When water or foam is used, frothing may occur.
When PTMEG is impregnated into high-surface-area material such as fibrous insulation (e.g., glass fibre, rock wool), PTMEG can be decomposed rapidly, releasing very flammable tetrahydrofuran, gamma- butyrolactone, etc. and may ignite at temperatures as low as 100°C.
Solidified PTMEG can be molten by being heated in melting room about 70℃ for about 2~3 days. Temperatures above 90℃ are not recommended for prolonged storage.
Drums should be stored in dry places such as warehouse with roof and before use any water on top plate of drums should be removed to prevent moisture contamination. During opening of drums and use of PTMEG in drums, nitrogen should be serviced into drums to avoid the contact with moisture and air.
Shipping temperature of ISO tank for PTMEG is about 60℃. ISO tank is insulated and provided with heating coils for reheating. If temperature is low and the product is solidified, enough reheating is required for melting and careful attention is required to avoid plugging of vent, nitrogen gas line and product line. Insure that ISO tank is adequately grounded before connecting and unloading.
The storage tank must be provided with external or internal heating to maintain a temperature of about 50~60℃ (Internal heating coil is recommended due to heating efficiency).
Because PTMEG is hygroscopic and oxidized, it is very important to protect PTMEG against exposure to moisture and air.
Therefore, Korea PTG recommends that PTMEG should be stored in completely enclosed tanks or containers under a dry nitrogen blanket.
Expiration date
Shelf life of PTMEG is approximate 2 years, under condition that the product is stored in unopened, tightly sealed original container at no greater than 90℃ and is not contacted with air under a dry nitrogen blanket.
