Description

1,4-Butanediol, Polymer With .Alpha.-Hydro-.Omega.-Hydroxypoly(Oxy-1,4-Butanediyl) And 1,1-Methylenebisisocyanatobenzene is a specialized polyurethane prepolymer or thermoplastic polyurethane (TPU) elastomer derived from MDI and poly(tetramethylene ether) glycol (PTMEG). This engineered polymer is valued for its excellent mechanical properties, including high elasticity, abrasion resistance, and hydrolytic stability. It is a critical raw material for manufacturers in the adhesives, sealants, coatings, and high-performance elastomer industries seeking durable and flexible polymer matrices.

Application

• High-Performance Thermoplastic Polyurethane (TPU) Elastomers: Used as a key prepolymer component for producing TPUs with superior tensile strength, flexibility, and resistance to oils and chemicals.
• Polyurethane Adhesives & Sealants: Serves as a base polymer in formulating high-strength, flexible adhesives and sealants for automotive, construction, and industrial assembly applications.
• Specialty Coatings and Binders: Employed in creating durable, protective coatings for textiles, industrial fabrics, and electronic components that require abrasion and moisture resistance.
• Elastomeric Fibers and Films: A precursor for spin-grade polymers used in the manufacture of elastic fibers (spandex-type) and breathable, waterproof films.
• Medical Device Components: Suitable for manufacturing certain medical tubing, catheter balloons, and other biocompatible elastomeric parts where purity and consistency are paramount.
• Industrial Rollers and Gaskets: Used in the production of molded or extruded parts that demand a combination of hardness, resilience, and long service life.

Basic Information

Product Name	1,4-Butanediol, Polymer With .Alpha.-Hydro-.Omega.-Hydroxypoly(Oxy-1,4-Butanediyl) And 1,1-Methylenebisisocyanatobenzene
CAS No.	37383-28-1
Molecular Formula	(C15H10N2O2 · C4H10O2 · (C4H8O)n)x
Molecular Weight	Varies (Polymer)
Synonyms	Poly(tetramethylene ether) glycol-MDI prepolymer; PTMEG-MDI prepolymer; 4,4'-Methylenebis(phenyl isocyanate), polymer with .alpha.-hydro-.omega.-hydroxypoly(oxy-1,4-butanediyl) and 1,4-butanediol; MDI/PTMEG polyurethane prepolymer; Thermoplastic polyurethane prepolymer based on MDI and PTMG; Polyurethane elastomer based on diphenylmethane diisocyanate and polytetramethylene ether glycol; TPU prepolymer (MDI/PTMEG type); Poly(oxy-1,4-butanediyl), .alpha.-hydro-.omega.-hydroxy-, polymer with 1,4-butanediol and 1,1'-methylenebis[4-isocyanatobenzene]
EINECS	Contact for details

Quality Control

Our 1,4-Butanediol, Polymer With .Alpha.-Hydro-.Omega.-Hydroxypoly(Oxy-1,4-Butanediyl) And 1,1-Methylenebisisocyanatobenzene is manufactured under a strict quality management system. Each batch is analyzed to ensure consistent NCO content, viscosity, and molecular weight distribution, which are critical for predictable polymerization behavior and final product performance. Certificates of Analysis (COA) detailing key specifications are provided with every shipment. We can support compliance requirements for various industrial standards.

Storage

Preserve in a tightly closed container, protected from light. This material is hygroscopic (moisture-sensitive). Store in a cool, dry, and well-ventilated area at room temperature (15-25°C/59-77°F). Keep the container tightly sealed under a dry inert atmosphere (nitrogen) to prevent moisture absorption and premature reaction. Isolate from strong bases, acids, and sources of heat or ignition.

Specification

Item	Specification
Appearance	Colorless to pale yellow viscous liquid or solid
NCO Content	Contact for details
Viscosity (@ 25°C)	Contact for details
Molecular Weight (Mw)	Contact for details
Moisture (Karl Fischer)	≤ 0.05%
Identification (IR)	Conforms

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.