Description

Isocyanic Acid, Polymethylenepolyphenylene Ester, Polymer With Methyloxirane Polymer With Oxirane Ether With 1,2,3-Propanetriol (3:1) is a specialized polymeric isocyanate, commonly known as a polyisocyanate prepolymer or hardener. This compound is a critical component in the formulation of high-performance polyurethane coatings, adhesives, and elastomers, providing excellent cross-linking properties and durability. It is essential for manufacturers in the coatings, automotive, construction, and industrial adhesive sectors seeking to produce materials with superior chemical resistance, mechanical strength, and weatherability.

Application

• High-Performance Polyurethane Coatings: Used as a curing agent or hardener in two-component (2K) polyurethane systems for industrial, automotive, and marine coatings.
• Adhesives and Sealants: Serves as a key cross-linking component in structural adhesives, providing strong bonds and flexibility.
• Elastomers and Castables: Employed in the production of polyurethane elastomers for wheels, rollers, and industrial parts requiring toughness.
• Construction Chemicals: Formulated into waterproofing membranes, concrete sealers, and flooring compounds for enhanced durability.
• Composite Materials: Acts as a matrix resin or binder in fiber-reinforced plastics (FRP) and other composite applications.
• Industrial Finishes: Used in wood, plastic, and metal finishes that demand high gloss, abrasion resistance, and fast curing.

Basic Information

Product Name	Isocyanic Acid, Polymethylenepolyphenylene Ester, Polymer With Methyloxirane Polymer With Oxirane Ether With 1,2,3-Propanetriol (3:1)
CAS No.	58228-05-0
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Polymeric MDI prepolymer; Polyisocyanate hardener; PMDI polyol adduct; Polymeric methylene diphenyl diisocyanate adduct; Isocyanic acid, polymer with methyloxirane and oxirane ether with glycerol (3:1); Polyurethane crosslinker; PU curing agent; Aromatic polyisocyanate resin.
EINECS	Contact for details

Quality Control

Our production of this polyisocyanate adduct follows rigorous quality protocols to ensure batch-to-batch consistency and performance. Quality is monitored through key parameters including NCO content, viscosity, and hydrolyzable chlorine levels. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and performance specifications is provided with every shipment to guarantee it meets your formulation requirements.

Storage

Preserve in a tightly closed, moisture-proof container, protected from light. Store in a cool, dry, and well-ventilated area at temperatures recommended for polyisocyanate products (typically 15-25°C/59-77°F). This product is hygroscopic (moisture-sensitive). Prolonged exposure to atmospheric moisture will cause degradation and loss of activity. Keep away from heat, open flames, and incompatible materials such as alcohols, amines, and water.

Specification

Item	Specification
Appearance	Clear, viscous liquid
Color (Gardner)	≤ 3
NCO Content	Contact for details
Viscosity (25°C)	Contact for details
Density (25°C)	Contact for details
Flash Point	> 200 °C
Hydrolyzable Chlorine	< 0.1 %

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