Polytetrahydrofuran Structure25190-06-1

Polytetrahydrofuran Structure 25190-06-1 (PTMEG), identified by CAS 25190-06-1, is a homopolymer produced via cationic ring-opening polymerization of tetrahydrofuran (THF) monomer with the aid of a catalyst. Classified as a linear polyether diol, it features primary hydroxyl groups at its terminals. The molecular makeup of this compound is defined by recurring –(CH₂)₄O– units, and it comes in various grades based on relative molecular weight, including 650, 1000, 1800, 2000, and 2900 Da. Notably, industrial manufacturing allows for adjustments to molecular weight as per market requirements, enabling the production of diverse specifications.​
 

At room temperature, PTMEG appears as a white waxy solid with a melting point ranging from 30 to 35°C; beyond this temperature range, it transitions into a clear, colorless liquid. It exhibits good solubility in alcohols, esters, ketones, aromatic compounds, and chlorinated hydrocarbons, while remaining insoluble in aliphatic hydrocarbons and water. Its primary application lies in the realm of high-performance elastomers.

Polytetrahydrofuran uses natural gas as raw material and is produced using the heterogeneous catalyst process of the American company Invista. The product quality is in a leading position in the world. In January 2013, it passed the INVISTA PTMEG commercial qualification certification and became the first company in China to obtain the INVISTA PTMEG technology license. manufacturer, and its products are used by many companies such as Foshan Invista and Huafeng Spandex, and have received unanimous praise. Our company can provide customers with high-quality 1000, 1800, 2000 and other molecular weight products.

1.Mainly used for the production of polyurethane elastomer, spandex and ester ether copolymer elastomer.

2.Thermoplastic polyurethane produced with PTMEG as raw material is widely used in petrochemical, machinery, military, shipbuilding, automobile, synthetic leather and other industries.

3.It is widely used in the production of coatings and surfactants.
 

 

 

Performance Validation Data

For Spandex Fibers:

Elastic recovery: ≥95% after 300% stretch

Tenacity: 0.8–1.2 g/denier

Yellowing resistance: Δb* <1.0 (500h UV)

For TPU Applications:

Shore hardness: 70A–95A (2000Da MW)

Tear strength: 60–120 kN/m

Low-temp flexibility: -60°C pass

Bulk can be filled by tankers, tankers and ISO tanks, all of which are insulated and equipped with heating coils.

Storage: Nitrogen, not with strong inorganic oxidants (e.g. nitric acid), moisture-absorbent, keep container tightly closed, preferably at temperatures above 45°C (113°F) to prevent solidification.

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