Description

Poly(Oxy-1,4-Butanediyl), .Alpha.-Hydro-.Omega.-Hydroxy-, Polymer With 1,1-Methylenebisisocyanatobenzene is a specialized polyurethane prepolymer based on polytetramethylene ether glycol (PTMEG) and methylene diphenyl diisocyanate (MDI). This high-performance material is valued for its excellent mechanical properties, hydrolytic stability, and chemical resistance, making it a critical intermediate for demanding elastomeric applications. It is primarily sought by manufacturers in the automotive, industrial machinery, and advanced materials sectors for producing durable components like seals, gaskets, wheels, and impact-resistant parts.

Application

• Cast Polyurethane Elastomers: Used as a key prepolymer for manufacturing high-performance cast elastomer parts requiring superior abrasion resistance and load-bearing capacity.
• Industrial Rollers and Wheels: Formulated into durable rollers for printing, paper handling, and material transport, as well as heavy-duty industrial wheels.
• Automotive Components: Serves as a base for producing suspension bushings, seals, gaskets, and other under-the-hood parts that demand oil and fuel resistance.
• Mining and Oilfield Equipment: Utilized in the production of wear-resistant liners, seals, and other components exposed to harsh environments.
• Adhesives and Sealants: Acts as a building block for high-strength, flexible polyurethane adhesives and sealants used in construction and assembly.
• Technical Molding: Employed in the reaction injection molding (RIM) or casting of complex, high-durability technical parts.

Basic Information

Product Name	Poly(Oxy-1,4-Butanediyl), .Alpha.-Hydro-.Omega.-Hydroxy-, Polymer With 1,1-Methylenebisisocyanatobenzene
CAS No.	51855-41-5
Molecular Formula	(C4H8O)n·C15H10N2O2
Molecular Weight	Varies (Polymer)
Synonyms	PTMEG-MDI Prepolymer; Poly(tetramethylene ether glycol)-MDI Prepolymer; Polytetrahydrofuran-MDI Adduct; MDI-terminated PTMEG; 4,4'-Methylenebis(phenyl isocyanate), polymer with poly(tetramethylene ether) glycol; Polyurethane Prepolymer based on PTMEG and MDI; α-Hydro-ω-hydroxypoly[oxy(1,4-butanediyl)] polymer with 1,1'-methylenebis[4-isocyanatobenzene]
EINECS	Contact for details

Quality Control

Our Poly(Oxy-1,4-Butanediyl), .Alpha.-Hydro-.Omega.-Hydroxy-, Polymer With 1,1-Methylenebisisocyanatobenzene is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing to ensure consistent performance, including measurement of NCO content, viscosity, and moisture levels. Certificates of Analysis (COA) detailing the specific results for all controlled parameters are provided with every shipment to guarantee traceability and compliance with your formulation requirements.

Storage

Preserve in a tightly closed container, protected from light. This product is hygroscopic (moisture-sensitive). Store in a cool, dry, and well-ventilated area at temperatures typically between 15-25°C (59-77°F). Keep containers tightly sealed when not in use to prevent moisture absorption and reaction with atmospheric humidity. Store away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Colorless to pale yellow viscous liquid
NCO Content	Contact for details
Viscosity @ 25°C	Contact for details
Moisture (Karl Fischer)	< 0.05%
Specific Gravity @ 25°C	Contact for details
Functionality	~2.0

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