Description

Isocyanic Acid, Polymethylenepolyphenylene Ester, Polymer With α-Hydro-ω-Hydroxypoly( Oxy-1,2-Ethanediyl) is a specialized polymeric isocyanate, commonly recognized as a key component in polyurethane chemistry. This compound matters for its role as a reactive intermediate, providing the essential isocyanate functionality required to form high-performance urethane linkages. It is primarily needed by manufacturers in the coatings, adhesives, sealants, and elastomers (CASE) industries, as well as for producing rigid and flexible foams.

Application

• Polyurethane Foam Production: Serves as a core isocyanate component in the formulation of both flexible and rigid polyurethane foams for insulation, automotive seating, and furniture.
• Coatings and Paints: Used in the synthesis of polyurethane coatings that offer exceptional durability, chemical resistance, and gloss for industrial, automotive, and wood finishing applications.
• Adhesives and Sealants: Acts as a building block for high-strength, moisture-curing polyurethane adhesives and sealants used in construction and automotive assembly.
• Elastomers: A critical raw material for manufacturing polyurethane elastomers, which are valued for their abrasion resistance and elasticity in parts like wheels, gaskets, and rollers.
• Binder Systems: Employed in foundry sands and composite materials as a polymeric binder to enhance structural integrity.
• Modifier for Polymers: Used to modify the properties of other polymers, improving characteristics such as toughness, thermal stability, and adhesion.

Basic Information

Product Name	Isocyanic Acid, Polymethylenepolyphenylene Ester, Polymer With α-Hydro-ω-Hydroxypoly( Oxy-1,2-Ethanediyl)
CAS No.	57636-09-6
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Polymeric MDI; PMDI; Polymethylene polyphenylene polyisocyanate; Crude MDI; Polymeric diphenylmethane diisocyanate; Isocyanic acid, polymer with formaldehyde and phenol; Polyisocyanate; Aromatic polyisocyanate.
EINECS	Contact for details

Quality Control

Our Isocyanic Acid, Polymethylenepolyphenylene Ester, Polymer With α-Hydro-ω-Hydroxypoly( Oxy-1,2-Ethanediyl) is produced under stringent quality management systems. Each batch undergoes rigorous analytical testing to ensure consistent purity, reactivity, and performance, meeting the specifications required for polyurethane applications. A comprehensive Certificate of Analysis (COA) detailing key parameters such as NCO content, viscosity, and acidity is provided with every shipment.

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). Ensure containers are sealed immediately after use to prevent contact with atmospheric moisture, which can cause polymerization or gelation. Keep away from heat, sparks, open flames, and incompatible materials such as alcohols, amines, and strong bases.

Specification

Item	Specification
Appearance	Brown viscous liquid
NCO Content	30.0 - 32.0 %
Viscosity (25°C)	150 - 250 mPa·s
Acidity (as HCl)	≤ 0.05 %
Hydrolyzable Chlorine	≤ 0.10 %
Specific Gravity (25°C)	1.22 - 1.25
Identification (IR)	Conforms

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