Polytetramethylene Ether Glycol (PTMEG)

Spandex Fibers: The primary raw material for manufacturing elastic fibers used in high-performance sportswear and apparel.
Polyurethane Elastomers: Used in the production of high-load industrial wheels, rollers, and mechanical seals.
Specialty Coatings: Incorporated into high-performance waterborne polyurethane dispersions (PUDs) for textiles and leather.

PTMEG, PTHF, Polytetrahydrofuran.

CAS: 25190-06-1
EC: 607-637-9
Sectors: Plastics & Polymers, Rubber & Elastomers, Textiles, Leather & Paper

Polytetramethylene Ether Glycol (PTMEG) (CAS 25190-06-1) is a Polymer Grade polyether polyol that appears as a waxy white fused mass at room temperature and melts to a clear liquid when heated, serving as the soft segment in high-performance polyurethanes for spandex fibers, industrial wheels and specialty coatings. Offering High Chemical Stability , it is the critical soft segment for high-performance polyurethanes. It is renowned for imparting superior elasticity, high tensile strength, and exceptional resistance to abrasion and fungal attack in finished polyurethane elastomers. PTMEG-based polyurethanes exhibit excellent low-temperature performance and hydrolytic stability compared to polyester-based alternatives. It is a vital raw material for the production of Spandex fibers, high-durability wheels, and specialized medical devices.

Typical Properties

Molecular formula	(C₄H₈O)nH₂O
Molecular weight	305.43 g/mol
Form	Fused mass
Melting point	20 °C
Boiling point	>204
Density	0.978 g/cm³ @ Temp: 23 °C
Water solubility	<10g/L
Flash point	>230 °F
pH	7 (H2O, 20°C)Aqueous solution
GHS signal word	Warning · Irritant / harmful
Grades available	Technical Grade

Typical literature values for identification; lot-specific results are stated on the certificate of analysis (COA) and the safety data sheet (SDS) that accompany every delivery.

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