Description

Isocyanic Acid, Polymethylenepolyphenylene Ester, 1,4-Butanediol, Alph A-Hydro-ω-Hydroxypoly(Oxy(Methyl-1,2-Ethanediyl)) Polymer is a specialized polyurethane prepolymer or polyol-isocyanate adduct, representing a high-performance building block for advanced polymer systems. This compound matters for its ability to impart tailored properties such as enhanced flexibility, adhesion, and chemical resistance in final polymeric materials. It is primarily needed by manufacturers in the coatings, adhesives, sealants, and elastomers (CASE) industries, as well as for producing specialized polyurethane foams and composites.

Application

• High-Performance Coatings: Used as a key component in formulating durable, chemical-resistant, and flexible polyurethane coatings for industrial and protective applications.
• Adhesives & Sealants: Serves as a reactive prepolymer to enhance the bonding strength, elasticity, and environmental durability of structural and specialty adhesives.
• Elastomer Production: Acts as a crucial intermediate in the synthesis of castable, thermoplastic, or millable polyurethane elastomers for gaskets, wheels, and industrial parts.
• Composite Materials: Incorporated into polymer matrices to improve interfacial adhesion and mechanical properties in fiber-reinforced composites.
• Specialty Foams: Utilized in the formulation of microcellular foams or foams requiring specific density and resilience profiles.
• Binder Systems: Functions as a polymeric binder in advanced materials such as foundry sands, abrasives, and non-woven fabrics.

Basic Information

Product Name	Isocyanic Acid, Polymethylenepolyphenylene Ester, 1,4-Butanediol, Alph A-Hydro-ω-Hydroxypoly(Oxy(Methyl-1,2-Ethanediyl)) Polymer
CAS No.	66072-18-2
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Polyurethane Prepolymer (MDI/Butanediol/Polyether); MDI-Based Polyurethane Pre-polymer; Polymeric MDI Adduct with Polyether Polyol and 1,4-Butanediol; 4,4'-Methylenediphenyl Diisocyanate (MDI) Adduct; Isocyanate-Terminated Polyether; Polyether-Modified Polyisocyanate; PU Prepolymer; CAS 66072-18-2
EINECS	Contact for details

Quality Control

Our Isocyanic Acid, Polymethylenepolyphenylene Ester, 1,4-Butanediol, Alph A-Hydro-ω-Hydroxypoly(Oxy(Methyl-1,2-Ethanediyl)) Polymer undergoes rigorous quality testing to ensure batch-to-batch consistency and compliance with industry standards. Production adheres to strict in-process controls, and each lot is characterized for critical parameters such as isocyanate (NCO) content, viscosity, and hydroxyl value. Certificates of Analysis (COA) detailing these specifications are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. This material is hygroscopic (moisture-sensitive) and must be stored under a dry, inert atmosphere (e.g., under dry nitrogen) to prevent premature reaction and degradation. Recommended storage temperature is between 15°C and 25°C in a cool, dry, well-ventilated area away from heat, sparks, and open flames. Keep container tightly sealed when not in use.

Specification

Item	Specification
Appearance	Viscous Liquid
Color (Gardner)	≤ 3
Isocyanate (NCO) Content	Contact for details
Viscosity @ 25°C	Contact for details
Hydroxyl Value (mg KOH/g)	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.