Description

Isocyanic Acid, Polymethylenepolyphenylene Ester, Polymer With .Alpha.-Hydro-.Omega.-Hydroxypolyoxy(Methyl-1,2-Ethanediyl) is a polymeric isocyanate, a key reactive intermediate in polyurethane chemistry. This compound matters for its ability to form durable, cross-linked polymer networks, providing essential properties like adhesion, flexibility, and chemical resistance. 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 Coatings Binder: A fundamental building block for high-performance industrial, automotive, and protective coatings requiring excellent weatherability and chemical resistance.
• Adhesive & Sealant Formulation: Used as a cross-linking agent to create strong, flexible polyurethane adhesives and sealants for construction, automotive assembly, and composite bonding.
• Elastomer Production: Serves as a key component in the synthesis of polyurethane elastomers for applications like rollers, wheels, gaskets, and impact-resistant parts.
• Rigid & Flexible Foam Manufacture: Acts as a core isocyanate component in the production of insulation foams for appliances and construction, as well as flexible foams for furniture and bedding.
• Composite Materials: Utilized in the production of fiber-reinforced plastics and other composite materials to enhance matrix properties and interfacial adhesion.
• Waterproofing Membranes: Incorporated into formulations for liquid-applied and sheet-based waterproofing systems in roofing and civil engineering.

Basic Information

Product Name	Isocyanic Acid, Polymethylenepolyphenylene Ester, Polymer With .Alpha.-Hydro-.Omega.-Hydroxypolyoxy(Methyl-1,2-Ethanediyl)
CAS No.	53862-89-8
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 α-hydro-ω-hydroxypoly(oxy(methyl-1,2-ethanediyl)); Polyether-modified polymeric MDI; MDI prepolymer.
EINECS	Contact for details

Quality Control

Our Isocyanic Acid, Polymethylenepolyphenylene Ester, Polymer With .Alpha.-Hydro-.Omega.-Hydroxypolyoxy(Methyl-1,2-Ethanediyl) is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure consistent performance, including measurement of NCO content, viscosity, and hydrolyzable chlorine. Certificates of Analysis (COA) documenting full specifications are available upon request 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 tightly sealed under a dry inert gas (e.g., nitrogen) blanket to prevent moisture ingress and premature polymerization. Isolate from heat, open flames, and incompatible materials such as alcohols, amines, and strong bases.

Specification

Item	Specification
Appearance	Brown viscous liquid
NCO Content	Contact for details
Viscosity (25°C)	Contact for details
Hydrolyzable Chlorine	≤ 0.1%
Acidity (as HCl)	≤ 0.05%
Specific Gravity (25°C)	~1.23

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