Description

Isocyanic Acid, Polymethylenepolyphenylene Ester, Polymer With 1,1'-Methylenebis[4-Isocyanatobenzene], Methyloxirane And Oxirane CAS NO 76755-68-5 is a specialized polymeric isocyanate, a key intermediate in the production of high-performance polyurethane systems. This compound is engineered to provide enhanced reactivity and structural versatility, enabling the formulation of materials with superior mechanical and thermal properties. It is primarily sought after by manufacturers in the coatings, adhesives, sealants, and elastomers (CASE) industries, as well as for advanced composite and foam applications.

Application

• High-Performance Polyurethane Coatings: Used as a cross-linking agent in industrial, automotive, and protective coatings for exceptional durability, chemical resistance, and gloss retention.
• Adhesives and Sealants: Serves as a critical component in formulating structural and elastic adhesives with strong bonding strength and flexibility.
• Elastomers and Castables: Enables the production of polyurethane elastomers for rollers, wheels, gaskets, and industrial parts requiring high abrasion resistance.
• Rigid and Flexible Foams: Acts as a core reactant in the synthesis of insulating foams for construction and appliance applications.
• Composite Materials: Utilized as a matrix resin or modifier in fiber-reinforced composites for the aerospace and automotive sectors.
• Binder Systems: Employed in foundry sands, abrasives, and other composite systems where strong, resilient binding is required.

Basic Information

Product Name	Isocyanic Acid, Polymethylenepolyphenylene Ester, Polymer With 1,1'-Methylenebis[4-Isocyanatobenzene], Methyloxirane And Oxirane
CAS No.	76755-68-5
Molecular Formula	Complex Polymer (Contact for details)
Molecular Weight	Varies by grade (Contact for details)
Synonyms	Polymeric MDI modified with propylene oxide and ethylene oxide; Modified polymeric diphenylmethane diisocyanate; PMDI-polyol adduct; Isocyanate-terminated polyether prepolymer; Polymeric isocyanate prepolymer; Oxirane, methyl-, polymer with oxirane and methylenebis[4-isocyanatobenzene], polymethylenepolyphenylene ester with isocyanic acid; MDI-based polyisocyanate polyol.
EINECS	Contact for details

Quality Control

Our production of this polymeric isocyanate adheres to strict quality management systems, ensuring 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 full specifications are provided with every shipment to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at temperatures recommended for the specific grade (typically between 15°C and 25°C). This product is hygroscopic (moisture-sensitive); containers must be kept sealed under a dry atmosphere (e.g., nitrogen blanket) to prevent moisture ingress and premature reaction.

Specification

Item	Specification
Appearance	Clear to pale yellow liquid
NCO Content	Contact for details
Viscosity @ 25°C	Contact for details
Specific Gravity @ 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.