Description

Isocyanic Acid, Polymethylenepolyphenylene Ester, Polymer With α-Hydro-ω-Hydroxypoly(Oxy(Methyl-1,2-Ethanediyl)) And 1,1-Methylenebis(4-Isocyanatobenzene) is a specialized polymeric isocyanate, CAS 76720-59-7, engineered for high-performance applications. This product is valued for its ability to impart exceptional durability, chemical resistance, and structural integrity in advanced material formulations. It is a critical raw material for manufacturers in the polyurethane, coatings, and specialty adhesives sectors seeking reliable and consistent performance.

Application

• High-Performance Polyurethane Elastomers: Used as a key isocyanate component in the production of durable elastomers for industrial wheels, rollers, and seals.
• Specialty Coatings and Paints: Serves as a cross-linking agent in advanced coating systems, providing excellent weatherability, abrasion resistance, and chemical protection.
• Structural Adhesives and Sealants: Formulated into high-strength adhesives for demanding applications in automotive, aerospace, and construction.
• Composite Materials: Acts as a binder or matrix resin in fiber-reinforced composites, enhancing mechanical properties and thermal stability.
• Flexible and Rigid Foams: Utilized in the synthesis of specialized polyurethane foams with tailored density and insulation properties.
• Waterproofing Membranes: A critical ingredient in liquid-applied roofing and waterproofing systems due to its excellent adhesion and moisture resistance.

Basic Information

Product Name	Isocyanic Acid, Polymethylenepolyphenylene Ester, Polymer With α-Hydro-ω-Hydroxypoly(Oxy(Methyl-1,2-Ethanediyl)) And 1,1-Methylenebis(4-Isocyanatobenzene)
CAS No.	76720-59-7
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Polymeric MDI (PMDI) modified with polyether polyol; Polyurethane prepolymer based on MDI and polyoxyethylene glycol; Isocyanic acid, polymer with α-hydro-ω-hydroxypoly[oxy(methyl-1,2-ethanediyl)] and methylenebis[4-isocyanatobenzene]; MDI-based polyurethane prepolymer; Polyether-modified polymeric isocyanate; Polymeric diphenylmethane diisocyanate prepolymer; PMDI prepolymer; Polyurethane resin precursor.
EINECS	Contact for details

Quality Control

Our production of this polymeric isocyanate adheres to strict quality management systems to ensure batch-to-batch consistency and performance reliability. Key parameters such as NCO content, viscosity, and hydrolyzable chlorine are rigorously monitored. Certificates of Analysis (COA) documenting all relevant specifications are provided with each shipment 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., nitrogen blanket) in a cool, well-ventilated area. Recommended storage temperature is between 15°C and 25°C. Keep away from heat, open flames, and sources of ignition. Containers must be kept tightly sealed when not in use to prevent moisture absorption and contamination.

Specification

Item	Specification
Appearance	Clear to pale yellow liquid
NCO Content	Contact for details
Viscosity (25°C)	Contact for details
Density (25°C)	Contact for details
Hydrolyzable Chlorine	≤ 0.1%
Identification (IR)	Conforms

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