Description

Polyoxy(Methyl-1,2-Ethanediyl), .Alpha.-Hydro-.Omega.-Hydroxy-, Polymer With 1,1-Methylenebisisocyanatobenzene, Isocyanate-Terminated is a specialized, isocyanate-terminated prepolymer derived from a polyether polyol and MDI (4,4'-methylenebis(phenyl isocyanate)). This product is engineered to serve as a critical reactive intermediate, offering a precise balance of flexibility and chemical reactivity for advanced polymer synthesis. It is essential for formulators and manufacturers in the polyurethane, adhesive, and specialty coating industries who require consistent, high-performance building blocks for their production processes.

Application

• Polyurethane Elastomer Precursor: A key component for casting, molding, and RIM (Reaction Injection Molding) systems to produce high-performance seals, gaskets, and industrial wheels.
• Adhesive & Sealant Formulation: Used as the isocyanate-reactive component in high-strength, moisture-curing structural adhesives and flexible sealants.
• Specialty Coating Binder: Imparts durability, chemical resistance, and flexibility in industrial and protective coatings for metal, concrete, and plastic substrates.
• Binder for Composite Materials: Employed in the production of fiber-reinforced composites and foundry binders, enhancing mechanical properties.
• Footwear & Automotive Components: Used in the manufacture of microcellular soles, automotive interior parts, and other molded polyurethane goods.
• Potting & Encapsulation Compounds: Provides excellent electrical insulation and environmental protection for electronic components.

Basic Information

Item	Detail
Product Name	Polyoxy(Methyl-1,2-Ethanediyl), .Alpha.-Hydro-.Omega.-Hydroxy-, Polymer With 1,1-Methylenebisisocyanatobenzene, Isocyanate-Terminated
CAS No.	96328-90-4
Molecular Formula	Contact for details
Molecular Weight	Contact for details (Varies by grade and NCO content)
Synonyms	MDI-terminated polyether prepolymer; Polyether polyol-MDI prepolymer; Isocyanate-terminated polyoxyethylene polyoxypropylene copolymer; Polyoxyalkylene polyol, polymer with methylenebis(phenyl isocyanate); Polyurethane prepolymer based on polyether and MDI; NCO-terminated polyether; Reactive polyurethane intermediate; 4,4'-MDI polyether prepolymer
EINECS	Contact for details

Quality Control

Every batch of our isocyanate-terminated prepolymer is manufactured under strict process controls and undergoes comprehensive analytical testing to ensure it meets precise specifications for NCO content, viscosity, and functionality. We provide a Certificate of Analysis (COA) with each shipment, detailing key parameters to guarantee batch-to-batch consistency and performance reliability for your formulations. Our quality system is designed to support demanding applications in regulated industries.

Storage

Preserve in a tightly closed, moisture-proof container, protected from light. Store in a cool, dry, and well-ventilated area at temperatures recommended for the specific grade (typically between 15-25°C). This product is hygroscopic (moisture-sensitive) and highly volatile; exposure to atmospheric moisture will cause reaction and viscosity increase. Keep away from heat, sparks, and open flame. Under recommended storage conditions, the product is typically stable for 6-12 months from the date of manufacture.

Specification

Item	Specification
Appearance	Colorless to pale yellow viscous liquid
NCO Content	As per grade (e.g., 4.0% - 12.0%)
Viscosity @ 25°C	As per grade
Specific Gravity @ 25°C	1.05 - 1.15
Hydrolyzable Chloride	< 0.1%
Moisture Content (Karl Fischer)	< 0.05%

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