Description

Castor Oil, Polymer With Dipropylene Glycol, 1,1'-Methylenebis[4-Isocyanatobenzene] And Polypropylene Glycol CAS NO 68989-48-0 is a specialized polyurethane prepolymer derived from castor oil, a renewable resource. This product matters as it offers a unique combination of flexibility, hydrolytic stability, and adhesion derived from its bio-based polyol component, making it a valuable alternative to purely petrochemical-based prepolymers. It is primarily needed by formulators in the adhesives, sealants, coatings, and elastomers industries seeking to enhance the performance and sustainability profile of their polyurethane systems.

Application

• Polyurethane Adhesives & Sealants: Used as a key prepolymer component to formulate flexible, moisture-curing adhesives and sealants with excellent adhesion to various substrates.
• Coatings and Binders: Serves as a bio-based polyol modifier in coatings to improve flexibility, impact resistance, and chemical resistance.
• Elastomer Manufacturing: Employed in the production of castable polyurethane elastomers, contributing to toughness and reduced moisture sensitivity.
• Composite Materials: Acts as a matrix resin or toughening agent in fiber-reinforced composites.
• Footwear and Automotive Parts: Utilized in the soles of footwear, gaskets, and other molded polyurethane components requiring durability.
• Encapsulation and Potting Compounds: Provides a protective, flexible barrier for electronic components.

Basic Information

Product Name	Castor Oil, Polymer With Dipropylene Glycol, 1,1'-Methylenebis[4-Isocyanatobenzene] And Polypropylene Glycol
CAS No.	68989-48-0
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Castor Oil Polyurethane Prepolymer; MDI-based Castor Oil Prepolymer; Polyurethane Prepolymer from Castor Oil and MDI; 4,4'-Methylenebis(phenyl isocyanate), polymer with castor oil, dipropylene glycol and polypropylene glycol; Polymeric MDI terminated with castor oil polyol; Bio-based Polyurethane Prepolymer; PU Prepolymer based on Castor Oil
EINECS	Contact for details

Quality Control

Our Castor Oil Polyurethane Prepolymer 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 moisture content. A Certificate of Analysis (COA) detailing all relevant specifications is 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 room temperature (15-25°C / 59-77°F). Due to its hygroscopic nature, exposure to atmospheric moisture must be minimized to prevent premature reaction and viscosity increase. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Yellow to amber viscous liquid
NCO Content	Contact for details
Viscosity (25°C)	Contact for details
Moisture Content	< 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.