Description

Polypropylene Polyol Diphenylmethanediisocyanate Prepolymer is a specialized isocyanate-terminated prepolymer derived from polypropylene glycol (PPG) and diphenylmethane diisocyanate (MDI). This compound is a crucial intermediate in the formulation of high-performance polyurethane systems, offering a balance of flexibility, hydrolytic stability, and processing control. It is primarily utilized by manufacturers in the adhesives, sealants, coatings, and elastomers industries seeking to enhance product durability and performance.

Application

• Polyurethane Adhesives & Sealants: A key raw material for formulating high-strength, moisture-curing adhesives and sealants with excellent flexibility and chemical resistance.
• Elastomer Production: Used in the manufacture of cast, thermoplastic, and millable polyurethane elastomers for industrial wheels, rollers, and gaskets.
• Coatings & Paints: Serves as a binder in protective and decorative coatings, providing abrasion resistance, weatherability, and adhesion to various substrates.
• Binder Systems: Employed in composite materials and foundry sand binders to improve mechanical properties and dimensional stability.
• Footwear & Sporting Goods: A component in the production of durable, flexible soles for footwear and components for sporting equipment.
• Automotive Components: Used in the fabrication of interior parts, under-the-hood components, and vibration-damping materials.

Basic Information

Product Name	Polypropylene Polyol Diphenylmethanediisocyanate Prepolymer
CAS No.	9048-57-1
Molecular Formula	Contact for details
Molecular Weight	Variable (Prepolymer)
Synonyms	MDI-PPG Prepolymer; PPG-MDI Prepolymer; Isocyanate-Terminated Polypropylene Glycol; Polypropylene Glycol Modified Diphenylmethane Diisocyanate; Polyurethane Prepolymer (PPG/MDI); 4,4'-Methylenediphenyl Diisocyanate Prepolymer with Polypropylene Glycol; Oligomeric MDI with Polypropylene Oxide Polyol
EINECS	Contact for details

Quality Control

Our Polypropylene Polyol Diphenylmethanediisocyanate Prepolymer is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing to ensure consistent performance, including measurement of NCO content, viscosity, and moisture levels. Certificates of Analysis (COA) documenting full specifications are provided with every shipment to guarantee compliance with 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 the specific grade, typically between 15°C and 25°C. This material is hygroscopic (moisture-sensitive) and must be protected from atmospheric moisture to prevent premature reaction and gelation.

Specification

Item	Specification
Appearance	Colorless to pale yellow viscous liquid
NCO Content	Contact for details
Viscosity (25°C)	Contact for details
Moisture (Karl Fischer)	< 0.05%
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.