Description

Benzenamine, 4,4'-Methylenebis-, Polymer With 1,3-Diisocyanatomethylbenzene And .Alpha.-Hydro-.Omega.-Hydroxypoly[Oxy(Methyl-1,2-Ethanediyl)] is a specialized polyurethane prepolymer or resin, formed from methylene diphenyl diisocyanate (MDI), a diamine chain extender, and a polyether polyol. This chemical structure is engineered to deliver exceptional durability, flexibility, and strong adhesion properties in final formulations. It is a critical raw material for industrial manufacturers requiring high-performance elastomers, coatings, adhesives, and sealants that must withstand demanding environmental and mechanical stress.

Application

• High-Performance Elastomers: Used in the production of cast polyurethane elastomers for industrial wheels, rollers, and mining screens.
• Protective Coatings & Paints: Serves as a key binder in industrial and marine coatings, providing excellent abrasion and chemical resistance.
• Adhesives & Sealants: A fundamental component in formulating structural adhesives for automotive, aerospace, and construction applications.
• Waterproofing Membranes: Utilized in liquid-applied roofing and waterproofing systems for buildings and infrastructure.
• Composite Materials: Acts as a matrix resin in fiber-reinforced composites for automotive parts and industrial components.
• Flexible Foams: Can be used in specialized, high-resilience molded flexible foams.
• Potting & Encapsulation: Employed for electrical potting compounds to protect sensitive components from moisture and vibration.

Basic Information

Product Name	Benzenamine, 4,4'-Methylenebis-, Polymer With 1,3-Diisocyanatomethylbenzene And .Alpha.-Hydro-.Omega.-Hydroxypoly[Oxy(Methyl-1,2-Ethanediyl)]
CAS No.	51888-37-0
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	4,4'-Methylenebisbenzenamine polymer with 1,3-diisocyanatomethylbenzene and α-hydro-ω-hydroxypoly[oxy(methyl-1,2-ethanediyl)]; MDI-based polyurethane prepolymer; Polyurethane resin from MDI, polyether polyol, and methylene dianiline; Polyether-based MDI prepolymer; Methylene diphenyl diisocyanate-polyether prepolymer; PU prepolymer; Isocyanate-terminated polyurethane prepolymer; Adhesive resin 51888-37-0
EINECS	Contact for details

Quality Control

Our production of this polyurethane prepolymer adheres to strict quality management systems to ensure batch-to-batch consistency and performance reliability. Key parameters such as isocyanate (NCO) content, viscosity, and equivalent weight are rigorously monitored. A comprehensive Certificate of Analysis (COA) detailing all relevant specifications is provided with every shipment to support your quality assurance protocols.

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). This product is hygroscopic (moisture-sensitive). Keep container tightly sealed under a dry inert atmosphere (e.g., nitrogen) to prevent moisture absorption and premature polymerization. Isolate from sources of heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Viscous liquid
Color (Gardner)	≤ 3
NCO Content (%)	Contact for details
Viscosity (cPs @ 25°C)	Contact for details
Equivalent Weight	Contact for details
Specific Gravity (25°C)	Contact for details
Moisture Content (Karl Fischer)	≤ 0.05%

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