Description

1,2-Propanediol, Polymer With 1,1'-Methylenebis[Isocyanatobenzene] And Methyloxirane is a specialized polyurethane polyol prepolymer, synthesized from propylene glycol, methylene diphenyl diisocyanate (MDI), and propylene oxide. This compound is engineered to serve as a high-performance reactive intermediate, offering controlled molecular weight and hydroxyl functionality for tailored polymer properties. It is primarily utilized by formulators in the polyurethane, coatings, adhesives, sealants, and elastomers (CASE) industries seeking to enhance product durability, flexibility, and chemical resistance.

Application

• Polyurethane Elastomers: As a key polyol component for manufacturing flexible and cast elastomers with superior mechanical properties.
• Coatings & Paints: Used in high-performance polyurethane coating formulations for industrial, automotive, and protective applications.
• Adhesives & Sealants: Serves as a building block in reactive hot-melt and moisture-curing adhesive systems.
• Binder Systems: Employed in composite materials and foundry binders for improved strength and thermal stability.
• Foam Modification: Acts as a compatibilizer or property modifier in rigid and flexible polyurethane foam production.
• Resin Intermediates: Used for further chemical synthesis to create custom urethane acrylates or other functional polymers.

Basic Information

Product Name	1,2-Propanediol, Polymer With 1,1'-Methylenebis[Isocyanatobenzene] And Methyloxirane
CAS No.	99784-49-3
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Propylene Glycol-MDI-Propylene Oxide Polymer; MDI-Propylene Glycol-Propylene Oxide Prepolymer; Polyurethane Polyol Prepolymer; Poly(oxy(methyl-1,2-ethanediyl)), α-hydro-ω-hydroxy-, polymer with 1,1'-methylenebis[4-isocyanatobenzene]; Oxirane, methyl-, polymer with 1,1'-methylenebis[isocyanatobenzene] and 1,2-propanediol; Urethane Polyol based on MDI and Propylene Oxide; Polyether Polyurethane Polyol; Reactive Polyol Intermediate.
EINECS	Contact for details

Quality Control

Our production of this polyurethane polyol adheres to strict quality management protocols to ensure batch-to-batch consistency and performance reliability. Key parameters such as hydroxyl value, isocyanate content, viscosity, and moisture are rigorously monitored. A comprehensive Certificate of Analysis (COA) detailing all specifications is provided with each 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 room temperature (15-25°C / 59-77°F). This product is hygroscopic (moisture-sensitive); containers must be kept sealed to prevent absorption of atmospheric moisture, which can affect product performance. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Viscous liquid
Color (Gardner)	≤ 3
Hydroxyl Value (mg KOH/g)	Contact for details
Viscosity @ 25°C (cPs)	Contact for details
Moisture (Karl Fischer)	≤ 0.05%
Isocyanate (NCO) Content	≤ 0.5%
Specific Gravity @ 25°C	Contact for details

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