Description

Poly(Oxy-1,4-Butanediyl), .Alpha.-Hydro-.Omega.-Hydroxy-, Polymer With 1,1-Methylenebis4-Isocyanatobenzene is a high-performance polyurethane prepolymer based on poly(tetramethylene ether) glycol (PTMEG) and 4,4'-methylenebis(phenyl isocyanate) (MDI). This specialized polymer is engineered to deliver exceptional mechanical strength, hydrolytic stability, and chemical resistance in demanding formulations. It is a critical raw material for manufacturers in the adhesives, sealants, coatings, and elastomers industries seeking to enhance product durability and performance under harsh conditions.

Application

• High-Performance Elastomers: Used as a prepolymer for manufacturing cast polyurethane (CPU) and thermoplastic polyurethane (TPU) elastomers with superior abrasion resistance and low-temperature flexibility.
• Industrial Adhesives & Sealants: Serves as a key component in formulating moisture-curing and two-component polyurethane adhesives and sealants for construction, automotive, and marine applications.
• Protective Coatings: Imparts toughness, chemical resistance, and weatherability to industrial and maintenance coatings for metal, concrete, and flooring.
• Fiber & Fabric Treatment: Utilized in coatings for synthetic leather, textile laminates, and other coated fabrics to improve durability and feel.
• Specialty Binders: Acts as a binder in composite materials, foundry sands, and other industrial applications requiring strong adhesion and flexibility.
• Footwear & Sporting Goods: A base material for producing durable, flexible soles, midsoles, and components in footwear and athletic equipment.

Basic Information

Item	Details
Product Name	Poly(Oxy-1,4-Butanediyl), .Alpha.-Hydro-.Omega.-Hydroxy-, Polymer With 1,1-Methylenebis4-Isocyanatobenzene
CAS No.	9048-58-2
Molecular Formula	(C4H8O)n·C15H10N2O2
Molecular Weight	Varies (Polymer)
Synonyms	PTMEG-MDI Prepolymer; Poly(tetramethylene ether) glycol-MDI prepolymer; MDI-terminated PTMEG; Polyurethane prepolymer based on PTMEG and MDI; 4,4'-MDI/PTMEG prepolymer; Poly(tetrahydrofuran)-MDI copolymer; α-Hydro-ω-hydroxy-poly(oxy-1,4-butanediyl)-poly[1,1'-methylenebis(4-isocyanatobenzene)]; PolyTHF-MDI adduct
EINECS	Contact for details

Quality Control

Our Poly(Oxy-1,4-Butanediyl), .Alpha.-Hydro-.Omega.-Hydroxy-, Polymer With 1,1-Methylenebis4-Isocyanatobenzene is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure consistent properties such as NCO content, viscosity, and moisture levels, meeting precise customer specifications. Certificates of Analysis (COA) documenting all critical parameters are provided with each shipment to guarantee traceability and batch-to-batch consistency.

Storage

Preserve in a tightly closed container, protected from light. 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 (e.g., nitrogen) to prevent moisture absorption and premature reaction. Isolate from sources of heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Colorless to pale yellow viscous liquid
Identification (IR)	Conforms to structure
NCO Content	As per grade (Typical range: 3.0 - 6.0 %)
Viscosity @ 25°C	As per grade (Typical range: 2,000 - 10,000 mPa·s)
Moisture (Karl Fischer)	≤ 0.05 %
Specific Gravity @ 25°C	~1.05 - 1.10

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